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You searched for: Journal name Applied energy Remove constraint Journal name: Applied energy Subject geometry Remove constraint Subject: geometry
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1. Asymmetric phenomenon of flow and heat transfer in charging process of thermal energy storage based on an entire domain model

Author:
Xuchen Ying; Weijia Huang; Wenhua Liu; Guiliang Liu; Jun Li; Mo Yang
Source:
Applied energy 2022 v.316 pp. 119122
ISSN:
0306-2619
Subject:
asymmetry; carbon; convection; geometry; liquids; nonlinear models; paraffin wax; temperature; thermal energy
Abstract:
... Phase change energy storage is getting increasing attention as a representative technology to achieve carbon neutrality. The phase change process exists typical phenomenon of asymmetry that affects the energy storage performance. However, the mechanism of asymmetry is currently lack of elaboration because the half domain model is always used to simplify the numerical simulation and avoid the appea ...
DOI:
10.1016/j.apenergy.2022.119122

2. Design of spatial variability in thermal energy storage modules for enhanced power density

Author:
Michael Shanks; Charles M. Shoalmire; Michael Deckard; Karan N. Gohil; Henry Lewis; Darin Lin; Patrick J. Shamberger; Neera Jain
Source:
Applied energy 2022 v.314 pp. 118966
ISSN:
0306-2619
Subject:
case studies; dynamic models; geometry; heat transfer; phase transition; thermal energy
Abstract:
... Peak load shifting requires strategies to efficiently and cost effectively absorb and discharge various forms of energy, including thermal energy. The energy storage rate of a thermal energy storage (TES) module containing phase change materials (PCMs) depends on the module geometry and dimensions, the internal distribution and orientation of PCMs and thermally conductive elements, the thermophysi ...
DOI:
10.1016/j.apenergy.2022.118966

3. Investigation of proton exchange membrane fuel cell stack with inversely phased wavy flow field design

Author:
Cong Yin; Yating Song; Meiru Liu; Yan Gao; Kai Li; Zemin Qiao; Hao Tang
Source:
Applied energy 2022 v.305 pp. 117893
ISSN:
0306-2619
Subject:
anodes; cathodes; convection; energy; fuel cells; geometry; models; temperature; water content
Abstract:
... The proton exchange membrane fuel cell stack based on metallic bipolar plate is promising in fuel cell vehicle applications due to its compact design and high power density. As the flow field design is critical to the fuel cell performance, in this work, the novel wavy flow fields designed in metallic bipolar plate with inverse phase for anode and cathode are investigated by both experiment and si ...
DOI:
10.1016/j.apenergy.2021.117893

4. Liquid desiccant dehumidification and regeneration process: Advancing correlations for moisture and enthalpy effectiveness

Author:
Alessandro Giampieri; Zhiwei Ma; Janie Ling-Chin; Huashan Bao; Andrew J. Smallbone; Anthony Paul Roskilly
Source:
Applied energy 2022 v.314 pp. 118962
ISSN:
0306-2619
Subject:
air; air temperature; cost effectiveness; dehumidification; desiccants; energy; enthalpy; geometry; liquids; mass flow; systems engineering; water content
Abstract:
... The paper developed correlations for predicting moisture and enthalpy effectiveness of the liquid desiccant dehumidification and regeneration process. Experimental dehumidification and regeneration data available from the literature with different system dimensions, liquid desiccant solutions (LiBr and LiCl), geometry and size of the packing and flow configuration (counter- and cross-flow) were ga ...
DOI:
10.1016/j.apenergy.2022.118962

5. Maximising the hydrodynamic performance of offshore oscillating water column wave energy converters

Author:
Eric Gubesch; Nagi Abdussamie; Irene Penesis; Christopher Chin
Source:
Applied energy 2022 v.308 pp. 118304
ISSN:
0306-2619
Subject:
energy conversion; geometry; hydrodynamics; models; water power
Abstract:
... This paper provides a thorough examination and discussion of a design process developed to improve the hydrodynamic performance of an asymmetrical offshore Oscillating Water Column (OWC) Wave Energy Converter (WEC). The resulting WEC geometry was based on a column-stabilised semi-submersible platform where an asymmetrical OWC chamber was integrated into the moonpool of the platform, resembling bot ...
DOI:
10.1016/j.apenergy.2021.118304

6. Option pricing of carbon asset and its application in digital decision-making of carbon asset

Author:
Yue Liu; Lixin Tian; Huaping Sun; Xiling Zhang; Chuimin Kong
Source:
Applied energy 2022 v.310 pp. 118375
ISSN:
0306-2619
Subject:
algorithms; assets; carbon; carbon markets; case studies; decision making; energy; geometry; models; prices; risk reduction; uncertainty
Abstract:
... Carbon emission allowances are issued to limit the carbon emission by enterprises, but some unforeseen variables may cause their demand unpredictable. Together with the high volatility of carbon price dynamic, management of carbon asset is of great significance and difficulty for those enterprises with heavy carbon consumption. To cope with the demand and price uncertainty of carbon emission right ...
DOI:
10.1016/j.apenergy.2021.118375

7. Wave energy extraction and hydroelastic response reduction of modular floating breakwaters as array wave energy converters integrated into a very large floating structure

Author:
Yong Cheng; Chen Xi; Saishuai Dai; Chunyan Ji; Maurizio Collu; Mingxin Li; Zhiming Yuan; Atilla Incecik
Source:
Applied energy 2022 v.306 pp. 117953
ISSN:
0306-2619
Subject:
geometry; mathematical models; water power
Abstract:
... Combing floating breakwaters with wave energy converters (WECs) and integrating them into very large floating structure (VLFS) can provide a viable option to explore economically offshore wave energy resources and simultaneously to protect marine structures. In this paper, the time-domain numerical model is developed based on the modal expansion theory with nonlinear consideration to optimize the ...
DOI:
10.1016/j.apenergy.2021.117953

8. 3-D numerical simulation and experimental study of PV module self-cleaning based on dew formation and single axis tracking

Author:
Kiyarash Rahbar; Shahab Eslami; Ramin Pouladian-Kari; Lars Kirchner
Source:
Applied energy 2022 v.316 pp. 119119
ISSN:
0306-2619
Subject:
capital; dew; dust; energy; geometry; labor; markets; mathematical models; runoff; solar collectors; solar energy
Abstract:
... Despite the global acceptance and rapid market penetration of PV power plants and recent advancements in increasing panels electrical efficiency, soiling is still one of the most critical challenges that deteriorate the performance. This study proposes a unique method for PV panel self-cleaning based on dew formation on panel’s active surface and with aid of Single Axis Tracking (SAT) mechanism. B ...
DOI:
10.1016/j.apenergy.2022.119119

9. Design and optimization of a liquid cooled heat sink for a motor inverter in electric vehicles

Author:
Feng Han; Hong Guo; Xiaofeng Ding
Source:
Applied energy 2021 v.291 pp. 116819
ISSN:
0306-2619
Subject:
energy; geometry; heat; liquids; mathematical models; temperature
Abstract:
... The rapid development of power electronic devices has made them have higher power density, which puts forward higher requirements for cooling technology. The contribution of this paper is the integrated design of the liquid cooled heat sink for a 30 kW motor inverter considering the distribution of power devices. In order to find an optimal heat sink configuration, the cooling performance of three ...
DOI:
10.1016/j.apenergy.2021.116819

10. Development and parameterization of a control-oriented electrochemical model of lithium-ion batteries for battery-management-systems applications

Author:
Yizhao Gao; Chenghao Liu; Shun Chen; Xi Zhang; Guodong Fan; Chong Zhu
Source:
Applied energy 2022 v.309 pp. 118521
ISSN:
0306-2619
Subject:
electric potential difference; electrochemistry; geometry; ionic liquids; liquids; models; thermodynamics
Abstract:
... A precise electrochemical battery model is critical for advanced battery management systems to improve the safety and efficiency of electric vehicles. This paper presents a novel methodology to develop and parameterize the electrochemical model through cell teardown and current/voltage data estimation. The partial differential equations of ionic electrolyte and potential dynamics in the solid and ...
DOI:
10.1016/j.apenergy.2022.118521

11. Effects of bolt torque and gasket geometric parameters on open-cathode polymer electrolyte fuel cells

Author:
Shuang Xing; Chen Zhao; Wei Liu; Jiexin Zou; Ming Chen; Haijiang Wang
Source:
Applied energy 2021 v.303 pp. 117632
ISSN:
0306-2619
Subject:
cathodes; deformation; dielectric spectroscopy; electrolytes; energy; geometry; mass transfer; polymers; torque
Abstract:
... Open-cathode polymer electrolyte fuel cells with compact design have attracted increasing attention in the field of portable energy equipment. In view of the open cathode design, these cells usually exhibit large ohmic and mass transfer resistances. Such resistances can be reduced by using optimized bolt torque as well as gasket. The present study explores the effects of bolt torque and gasket geo ...
DOI:
10.1016/j.apenergy.2021.117632

12. Exergoeconomic analysis for a thermoelectric generator using mutation particle swarm optimization (M-PSO)

Author:
Xi Wang; Paul Henshaw; David S.-K. Ting
Source:
Applied energy 2021 v.294 pp. 116952
ISSN:
0306-2619
Subject:
algorithms; commercialization; cost effectiveness; exergy; geometry; mutation; temperature; thermoelectric generators
Abstract:
... Efficiency and cost-effectiveness play dominant roles in the commercialization of thermoelectric generator (TEG) technology. In this paper, the exergy analysis of a TEG module with 199 TE couples was considered. Two objective functions, the exergy efficiency and levelized cost of energy (LCOE), were established for exergoeconomic analysis. The geometric structure and working conditions involving T ...
DOI:
10.1016/j.apenergy.2021.116952

13. Experimental and numerical study on thermal performance of an indirectly irradiated solar reactor with a clapboard-type internally circulating fluidized bed

Author:
Xian Li; Liping Wei; Chia Wei Lim; Jialing Chen; Peng Chu; Wojciech Lipiński; Ning Yan; Yanjun Dai; Chi-Hwa Wang
Source:
Applied energy 2022 v.305 pp. 117976
ISSN:
0306-2619
Subject:
Singapore; biogasification; energy; fluidized beds; geometry; heat; hydrodynamics; mass transfer; models; solar energy; solar radiation; synthesis gas; thermal conductivity
Abstract:
... Fluidized-bed based solar reactors for the gasification of biomass have been widely recognized as a promising approach to produce high-quality syngas due to the merits, e.g. continuous operation and superior heat and mass transport. In this work, a novel high-temperature solar reactor with a clapboard-type internally circulating configuration that can efficiently mitigate the overheating of the be ...
DOI:
10.1016/j.apenergy.2021.117976

14. Forecasting the price-response of a pool of buildings via homothetic inverse optimization

Author:
Ricardo Fernández-Blanco; Juan Miguel Morales; Salvador Pineda
Source:
Applied energy 2021 v.290 pp. 116791
ISSN:
0306-2619
Subject:
energy; geometry; prototypes
Abstract:
... This paper focuses on the day-ahead forecasting of the aggregate power of a pool of smart buildings equipped with thermostatically-controlled loads. We first propose the modeling of the aggregate behavior of its power trajectory by using a geometric approach. Specifically, we assume that the aggregate power is a homothet of a prototype building, whose physical and technical parameters are chosen t ...
DOI:
10.1016/j.apenergy.2021.116791

15. Geometric neuro-fuzzy transfer learning for in-cylinder pressure modelling of a diesel engine fuelled with raw microalgae oil

Author:
Ji Li; Dawei Wu; Hassan Mohammadsami Attar; Hongming Xu
Source:
Applied energy 2022 v.306 pp. 118014
ISSN:
0306-2619
Subject:
air pollution; biofuels; biomass; carbon dioxide; diesel engines; energy; geometry; greenhouse gases; microalgae; models; oils; photosynthesis; prediction
Abstract:
... Bioenergy attracts more attention owing to the reduction of both air pollution and greenhouse gas emissions in a whole life cycle compared to fossil fuels. As a third-generation biofuel, Microalgae Oil (MAO) can utilise carbon dioxide and light energy at an increased photosynthetic efficiency compared to energy crops for biomass. Due to the wide variety of MAO and their blends with diesel in diffe ...
DOI:
10.1016/j.apenergy.2021.118014

16. High spatial resolution temperature profile measurements of solid-oxide fuel cells

Author:
Mohamed A.S. Zaghloul; Jerry H. Mason; Mohan Wang; Michael Buric; Zhaoqiang Peng; Shiwoo Lee; Paul Ohodnicki; Harry Abernathy; Kevin Peng Chen
Source:
Applied energy 2021 v.288 pp. 116633
ISSN:
0306-2619
Subject:
anodes; cathodes; electrochemistry; energy; fuel cells; geometry; irradiation; longevity; temperature profiles
Abstract:
... Temperature gradients resulting from local electrochemical reactions, current distribution and geometry of gas flow channels in solid oxide fuel cells (SOFCs) create thermal stresses, localized thermophysical property gradients and uneven property evolution, contributing to SOFC degradation. This paper presents a new method to perform temperature measurements (up to 800 °C) at high spatial resolut ...
DOI:
10.1016/j.apenergy.2021.116633

17. Investigations on heat and mass transfer in gas diffusion layers of PEMFC with a gas–liquid-solid coupled model

Author:
Daokuan Jiao; Kui Jiao; Shenghui Zhong; Qing Du
Source:
Applied energy 2022 v.316 pp. 118996
ISSN:
0306-2619
Subject:
condensates; condensation (phase transition); convection; deformation; droplet size; electrical conductivity; energy; geometry; liquids; mass transfer; models; stochastic processes; temperature; water distribution
Abstract:
... Improvement of heat and water management in gas diffusion layers (GDL) is a critical issue to high-performance proton exchange membrane fuel cells (PEMFC). In this study, we develop a gas–liquid-solid coupled solver to simultaneously model the liquid water transport, vapor condensation, conjugate heat transfer, electric conduction and their interactions. A stochastic method is employed to reconstr ...
DOI:
10.1016/j.apenergy.2022.118996

18. Life cycle embodied, operational and mobility-related energy and greenhouse gas emissions analysis of a green development in Melbourne, Australia

Author:
Alejandro Lara Allende; André Stephan
Source:
Applied energy 2022 v.305 pp. 117886
ISSN:
0306-2619
Subject:
case studies; computer software; embodied energy; energy efficiency; geometry; greenhouse gases; Australia
Abstract:
... At least 40% of total greenhouse gas emissions are related to the built environment, mostly because of energy coming from fossil fuels. In response, developments with an improved energy efficiency (e.g. so-called ‘green’ or ‘net-zero energy’ developments) have been built. Despite reductions in operational energy use in ‘green’ developments, previous studies have identified trade-offs in terms of e ...
DOI:
10.1016/j.apenergy.2021.117886

19. Numerical simulation of the calcium hydroxide/calcium oxide system dehydration reaction in a shell-tube reactor

Author:
Mengyi Wang; Li Chen; Yuhao Zhou; Wen-Quan Tao
Source:
Applied energy 2022 v.312 pp. 118778
ISSN:
0306-2619
Subject:
calcium hydroxide; calcium oxide; energy conversion; energy density; flow resistance; geometry; heat transfer; mathematical models; porosity; steam; temperature; thermal conductivity
Abstract:
... The Ca(OH)₂/CaO system is a promising candidate for thermochemical energy storage because of its high energy density, low cost and negligible heat loss. Coupling mechanisms of multiple physiochemical processes still need further investigation and the system performance should be further improved. In this work, for the first time, a three-dimensional numerical model is developed to study the thermo ...
DOI:
10.1016/j.apenergy.2022.118778

20. Potential strategies to mitigate the heat island impacts of highway pavement on megacities with considerations of energy uses

Author:
Ling Xu; Jiayu Wang; Feipeng Xiao; Sherif EI-Badawy; Ahmed Awed
Source:
Applied energy 2021 v.281 pp. 116077
ISSN:
0306-2619
Subject:
energy; evaporation; geometry; heat; heat island; humans; pavements; solar collectors; solar energy; thermal properties; urbanization
Abstract:
... With the rapid expansion of urbanization around the world, the urban heat island effect embraced an enormous negative impact on megacities, including energy, environment and health conditions. Unfortunately, constructive geometry and human activities of megacities severely intensified the urban heat island phenomenon. Giving the contributions of pavement on the deterioration of urban heat island i ...
DOI:
10.1016/j.apenergy.2020.116077

21. Using a screw-type machine as reversible compressor–expander in a Carnot Battery: An analytical study towards efficiency

Author:
Daniel Steger; Michael Feist; Eberhard Schlücker
Source:
Applied energy 2022 v.316 pp. 118950
ISSN:
0306-2619
Subject:
batteries; geometry; heat pumps; thermal energy; thermodynamics
Abstract:
... The Carnot Battery is an energy storage concept combining two thermodynamic processes to load and unload a thermal energy reservoir. The idea is under current research by several groups, one possible approach deals with the usage of a Heat Pump Cycle (HP) and an Organic Rankine Cycle (ORC). Saving investment costs, a combination of both processes is possible when using some of the components rever ...
DOI:
10.1016/j.apenergy.2022.118950

22. A comprehensive and fully predictive discrete methodology for volumetric solar receivers: application to a functional parabolic dish solar collector system

Author:
Jorge E.P. Navalho; José C.F. Pereira
Source:
Applied energy 2020 v.267 pp. 114781
ISSN:
0306-2619
Subject:
foams; geometry; heat transfer; hydrodynamics; irradiation; mathematical models; prediction; solar collectors; solar radiation; temperature
Abstract:
... A comprehensive modeling approach is herein presented for accurate and reliable numerical predictions of the optical, hydrodynamic, and thermal performance of concentrating solar collector systems. The methodology is applied to investigate the performance of a particular and fully functional parabolic dish solar collector system fitted with a volumetric absorber (open-cell foam). At the receiver l ...
DOI:
10.1016/j.apenergy.2020.114781

23. A coupled electrical-thermal impedance matching model for design optimization of thermoelectric generator

Author:
Zhi-Zhu He
Source:
Applied energy 2020 v.269 pp. 115037
ISSN:
0306-2619
Subject:
geometry; heat; heat tolerance; models; prediction; system optimization; thermoelectric generators; working conditions
Abstract:
... Based on the definition of numerical-type equivalent thermoelectric parameters through developing a 1D self-consistent numerical method, this paper established a novel coupled electrical-thermal impedance matching (CETIM) model for prediction of the maximum output power and the highest conversion efficiency of thermoelectric generator (TEG). CETIM model could highlight the impacts of thermal worki ...
DOI:
10.1016/j.apenergy.2020.115037

24. A high efficient heat exchanger with twisted geometries for biogas process with manure slurry

Author:
Jingjing Chen; Mikael Risberg; Lars Westerlund; Urban Jansson; Xiaohua Lu; Changsong Wang; Xiaoyan Ji
Source:
Applied energy 2020 v.279 pp. 115871
ISSN:
0306-2619
Subject:
algorithms; anaerobic digestion; animal manures; biogas; energy; energy conservation; geometry; heat exchangers; heat transfer; mathematical models; turbulent flow
Abstract:
... Heat-transfer enhancement in manure slurry is crucial for increasing the efficiency and production of biogas during anaerobic digestion in biogas plants. In this study, a novel heat exchanger with an optimal twisted geometry was developed based on the numerical screening of the twisted tubes with equilateral polygons, and experiments were conducted to validate the numerical results. It was observe ...
DOI:
10.1016/j.apenergy.2020.115871

25. A multi-dimensional parametric study of variability in multi-phase flow dynamics during geologic CO2 sequestration accelerated with machine learning

Author:
Hao Wu; Nicholas Lubbers; Hari S. Viswanathan; Ryan M. Pollyea
Source:
Applied energy 2021 v.287 pp. 116580
ISSN:
0306-2619
Subject:
carbon dioxide; carbon sequestration; energy; geometry; hydrodynamics; neural networks; permeability; uncertainty
Abstract:
... Successful geologic CO₂ storage projects depend on numerical simulations to predict reservoir performance during site selection, injection verification, and post-injection monitoring phases of the project. These numerical simulations solve non-linear sets of coupled partial differential equations, while accounting for multi-phase fluid dynamics on the basis of constitutive equations that are embed ...
DOI:
10.1016/j.apenergy.2021.116580

26. Additive manufacturing for energy: A review

Author:
Cheng Sun; Yun Wang; Michael D. McMurtrey; Nathan D. Jerred; Frank Liou; Ju Li
Source:
Applied energy 2021 v.282 pp. 116041
ISSN:
0306-2619
Subject:
batteries; climate change; energy; fuel cells; geometry; greenhouse gas emissions; models; nuclear power; oils; pollution
Abstract:
... The conflict between rapidly growing global energy demand and climate change is a grand challenge that requires significant science and technology innovations. Advanced manufacturing could extensively drive down greenhouse gas emission and pollution, and shorten the time-to-market. Additive manufacturing is a process of fabricating three-dimensional objects by depositing materials layer-by-layer d ...
DOI:
10.1016/j.apenergy.2020.116041

27. Assessing the impact of injector included angle and piston geometry on thermally stratified compression ignition with wet ethanol

Author:
Brian Gainey; James Gohn; Deivanayagam Hariharan; Mozhgan Rahimi-Boldaji; Benjamin Lawler
Source:
Applied energy 2020 v.262 pp. 114528
ISSN:
0306-2619
Subject:
diesel engines; ethanol; geometry; injectors; temperature profiles
Abstract:
... Recent results have concluded that the efficacy of compression stroke injections in enhancing natural thermal stratification are dependent on the injector’s included angle. Therefore, there is a need to further understand how different hardware affects the efficacy of thermally stratified compression ignition. In this study, three injector included angles are considered: 150°, 118°, and 60°. Compr ...
DOI:
10.1016/j.apenergy.2020.114528

28. Beyond Leidenfrost levitation: A thin-film boiling engine for controlled power generation

Author:
Prashant Agrawal; Gary G. Wells; Rodrigo Ledesma-Aguilar; Glen McHale; Khellil Sefiane
Source:
Applied energy 2021 v.287 pp. 116556
ISSN:
0306-2619
Subject:
asymmetry; droplets; friction; geometry; heat; hydrodynamics; liquids; lubrication; mass transfer; models; power generation; temperature; thermal energy; vapors
Abstract:
... Overcoming friction between moving components is important for reducing energy losses and component wear. Hydrodynamic lubrication via thin-film boiling provides an opportunity for reduced friction energy and mass transport. A common example of such lubrication is the Leidenfrost effect, where a liquid droplet levitates on a cushion ofits own vapor on a surface heated to temperatures above the liq ...
DOI:
10.1016/j.apenergy.2021.116556

29. Comparing methods for improving spark-ignited engine efficiency: Over-expansion with multi-link cranktrain and high compression ratio with late intake valve closing

Author:
Zhuyong Yang; Niranjan Miganakallu; Tyler Miller; Jeremy Worm; Jeffrey Naber; David Roth
Source:
Applied energy 2020 v.262 pp. 114560
ISSN:
0306-2619
Subject:
engines; equipment design; equipment performance; geometry; models
Abstract:
... A common approach of high efficiency engines is to utilize high compression with late intake valve closing (LIVC) to realize an over-expanded cycle. A multi-link cranktrain can also realize an over-expanded cycle with the same geometric intake displacement as a baseline engine while extending the expansion stroke. These two types of over-expanded cycle engines and a baseline engine are investigate ...
DOI:
10.1016/j.apenergy.2020.114560

30. Design and performance evaluation of a dual-circuit thermal energy storage module for air conditioners

Author:
Anurag Goyal; Eric Kozubal; Jason Woods; Malek Nofal; Said Al-Hallaj
Source:
Applied energy 2021 v.292 pp. 116843
ISSN:
0306-2619
Subject:
air; air conditioning; composite materials; equipment; foams; geometry; graphene; heat exchangers; heat transfer; mathematical models; temperature; thermal energy
Abstract:
... We present experimental results and a validated numerical model of a dual-circuit phase-change thermal energy storage module for air conditioners. The module incorporates a phase-change material encapsulated in compressed expanded natural graphite foam. We used n-tetradecane as the PCM with a transition temperature (~4.5 °C) suitable for air-conditioning applications. Heat exchange to and from the ...
DOI:
10.1016/j.apenergy.2021.116843

31. Design and simulation of a heat-driven direct reverse osmosis device for seawater desalination powered by solar thermal energy

Author:
Peter Godart
Source:
Applied energy 2021 v.284 pp. 116039
ISSN:
0306-2619
Subject:
adults; air temperature; desalination; energy; geometry; reverse osmosis; salinity; seawater; solar radiation; solar thermal energy; water reservoirs
Abstract:
... This paper presents the design and simulation of a high-performance, low-cost, and robust method for using solar thermal energy to power small-scale and short-term seawater desalination via reverse osmosis (RO). In this proposed approach, solar radiation heats a piston containing a saturated working fluid, which directly pressurizes a feed water reservoir connected to an RO membrane assembly. A dy ...
DOI:
10.1016/j.apenergy.2020.116039

32. Frequency regime dependent figures of merit and optimization guidelines for maximizing pyroelectric power output

Author:
Joshua D. Wilbur; Chris Dames
Source:
Applied energy 2021 v.293 pp. 116868
ISSN:
0306-2619
Subject:
energy conversion; geometry; temperature; thermal energy
Abstract:
... Traditionally, pyroelectric energy conversion research has focused on improving energy output per cycle between fixed temperature bounds; however, most end-uses have fixed power, not energy, demands. Here, we analyze pyroelectric energy harvesting systems through the lens of maximizing power output, focusing specifically on the oft-overlooked details of the average temperature amplitude of the pyr ...
DOI:
10.1016/j.apenergy.2021.116868

33. Geometric optimisation of wave energy conversion devices: A survey

Author:
Bingyong Guo; John V. Ringwood
Source:
Applied energy 2021 v.297 pp. 117100
ISSN:
0306-2619
Subject:
energy conversion; geometry; surveys; uncertainty; water power; wind
Abstract:
... Unlike more established renewable energy conversion technologies, such as wind turbines, wave power systems have reached neither commercial maturity, nor technological convergence. The significant variation in device geometries and operating principles has resulted in a diversification of effort, with little coordination or true comparative analysis. The situation is compounded by the relative lac ...
DOI:
10.1016/j.apenergy.2021.117100

34. Heat-transfer enhancement for corn straw slurry from biogas plants by twisted hexagonal tubes

Author:
Jingjing Chen; Zhong Hai; Xiaohua Lu; Changsong Wang; Xiaoyan Ji
Source:
Applied energy 2020 v.262 pp. 114554
ISSN:
0306-2619
Subject:
biogas; corn straw; engineering; equations; gas production (biological); geometry; mathematical models; mixing; slurries; waste heat recovery
Abstract:
... Heat-transfer geometries that enhance heat transfer performance for slurries increase the net raw biogas production in the bio-methane process. In this study, the precise temperature-dependent rheologies of corn straw slurry with 6 and 8% total solid were determined, collected, and modeled to conduct a numerical simulation via CFD, the first instance of such research. Subsequently, the reliability ...
DOI:
10.1016/j.apenergy.2020.114554

35. Hull geometry optimisation of wave energy converters: On the choice of the objective functions and the optimisation formulation

Author:
Anna Garcia-Teruel; Bryony DuPont; David I.M. Forehand
Source:
Applied energy 2021 v.298 pp. 117153
ISSN:
0306-2619
Subject:
commercialization; cost effectiveness; geometry; surface area; water power
Abstract:
... Wave Energy Converters (WECs) with optimised geometries and control systems have been developed in recent years to advance marine energy technologies towards commercialisation. In particular, a number of WEC hull geometry optimisation studies have been performed, due to the high cost reduction potential associated with the device structure. However, no standard and consistent method has been estab ...
DOI:
10.1016/j.apenergy.2021.117153

36. Hull geometry optimisation of wave energy converters: On the choice of the optimisation algorithm and the geometry definition

Author:
Anna Garcia-Teruel; Bryony DuPont; David I.M. Forehand
Source:
Applied energy 2020 v.280 pp. 115952
ISSN:
0306-2619
Subject:
algorithms; cost effectiveness; energy conversion; geometry; system optimization; water power
Abstract:
... It is key in the development of wave energy systems to aim at designing economically competitive solutions that enable maximal annual energy production. Previous studies identify the Wave Energy Converter (WEC) structure, i.e. the hull, to have one of the largest cost reduction potentials. Due to this potential, geometry optimisation of WECs has been previously considered, however, most of these s ...
DOI:
10.1016/j.apenergy.2020.115952

37. Local degradation effects in automotive size membrane electrode assemblies under realistic operating conditions

Author:
Aliaksandr Bandarenka; Tim Lochner; Laurens Hallitzky; Markus Perchthaler; Michael Obermaier; Jarek Sabawa; Simon Enz; Aliaksandr S. Bandarenka
Source:
Applied energy 2020 v.260 pp. 114291
ISSN:
0306-2619
Subject:
anodes; carbon; catalysts; cathodes; corrosion; electric potential difference; electrochemistry; fuel cells; fuels; geometry; hydrogen; mathematical models; monitoring; oxidation; relative humidity; scanning electron microscopy; temperature
Abstract:
... In automotive applications, the operational parameters for fuel cell (FC) systems can vary over a wide range. To analyze their impact on fuel cell degradation, an automotive size single cell was operated under realistic working conditions. The parameter sets were extracted from the FC system modeling based on on-road customer data. The parameter variation included simultaneous variation of the FC ...
DOI:
10.1016/j.apenergy.2019.114291

38. Long term performance analysis of low concentrating photovoltaic (LCPV) systems for building retrofit

Author:
Ranga Vihari Parupudi; Harjit Singh; Maria Kolokotroni; Jose Tavares
Source:
Applied energy 2021 v.300 pp. 117412
ISSN:
0306-2619
Subject:
electric power; energy; geometry; solar collectors; solar radiation
Abstract:
... Low concentrating photovoltaic (LCPV) systems offer viable solution for generating higher energy output per unit cell area compared to a typical flat PV panel, making them potential candidates for building retrofit. However, the best LCPV geometry for a given location is yet to be identified. The current study investigates the technical, economic and environmental feasibility of three geometricall ...
DOI:
10.1016/j.apenergy.2021.117412

39. Model and observation of dispatchable region for flexible distribution network

Author:
Jun Xiao; Guoqiang Zu; Ying Wang; Xinsong Zhang; Xun Jiang
Source:
Applied energy 2020 v.261 pp. 114425
ISSN:
0306-2619
Subject:
electric potential difference; electronic equipment; geometry; models; topology
Abstract:
... Soft open points (SOPs), defined as the power electronic devices installed to replace normally open points in distribution network, can improve the flexibility of power control and thus further enhance the reliability and economy of power grids. Flexible distribution network (FDN) is a system-level concept to describe the distribution network equipped with multiple SOPs. Region method is to descri ...
DOI:
10.1016/j.apenergy.2019.114425

40. Multi-objective approach to the optimization of shape and envelope in building energy design

Author:
Adriana Ciardiello; Federica Rosso; Jacopo Dell'Olmo; Virgilio Ciancio; Marco Ferrero; Ferdinando Salata
Source:
Applied energy 2020 v.280 pp. 115984
ISSN:
0306-2619
Subject:
Mediterranean climate; algorithms; case studies; computer software; energy; energy costs; geometry
Abstract:
... In accordance with national and international regulations, the energy usage and emissions of buildings need to be reduced. Both new constructions and retrofit actions should consider the strict requirements of a more sustainable built environment. In many cases, passive and active strategies are only added to the project after an initial conceptual design of the building has already been drawn up, ...
DOI:
10.1016/j.apenergy.2020.115984

41. Multi-objective optimisation framework for designing office windows: quality of view, daylight and energy efficiency

Author:
Peiman Pilechiha; Mohammadjavad Mahdavinejad; Farzad Pour Rahimian; Phillippa Carnemolla; Saleh Seyedzadeh
Source:
Applied energy 2020 v.261 pp. 114356
ISSN:
0306-2619
Subject:
buildings; climatic factors; decision making; energy efficiency; geometry; lighting; meteorological data; models; solar radiation; systems engineering
Abstract:
... This paper presents a new, multi-objective method of analysing and optimising the energy processes associated with window system design in office buildings. The simultaneous consideration of multiple and conflicting design objectives can make the architectural design process more complicated. This study is based on the fundamental recognition that optimising parameters on the building energy loads ...
DOI:
10.1016/j.apenergy.2019.114356

42. Numerical study on a novel parabolic trough solar receiver-reactor and a new control strategy for continuous and efficient hydrogen production

Author:
Ze-Dong Cheng; Ya-Kun Leng; Jing-Jing Men; Ya-Ling He
Source:
Applied energy 2020 v.261 pp. 114444
ISSN:
0306-2619
Subject:
energy conversion; geometry; hydrogen production; kinetics; methanol; models; solar collectors; solar radiation; temperature; thermal energy
Abstract:
... In this paper, a novel parabolic trough solar receiver-reactor is proposed for continuous and efficient hydrogen production via the methanol-steam reforming reaction. With a concentric through-type tube introduced for thermal energy storage, this novel system canbe effectively applied for better solar thermochemical energy conversion and management. The proposed novel system and the corresponding ...
DOI:
10.1016/j.apenergy.2019.114444

43. Optimization of vapor anode multi-tube alkali metal thermoelectric converter based on an integrated model

Author:
Lei Zhu; Xinbiao Jiang; Huaqi Li; Xiaoya Kang; Xiaoyan Tian; Sen Chen; Suizheng Qiu
Source:
Applied energy 2020 v.259 pp. 114117
ISSN:
0306-2619
Subject:
anodes; cell walls; computer software; electricity; geometry; heat transfer; model validation; models; prediction; temperature; thermal radiation; vapors
Abstract:
... The alkali metal thermal to electric converter (AMTEC) is a promising technology for direct conversion of heat to electricity. Design optimization and cell fabrication have been attracting wide interest to improve the cell performance. An integrated analysis model has been developed in this paper. The model includes three coupled parts of a thermal model, an electric model, and a pressure loss mod ...
DOI:
10.1016/j.apenergy.2019.114117

44. Overheating risk in Mediterranean residential buildings: Comparison of current and future climate scenarios

Author:
Eugénio Rodrigues; Marco S. Fernandes
Source:
Applied energy 2020 v.259 pp. 114110
ISSN:
0306-2619
Subject:
buildings; climate; cooling; data collection; energy; geometry; global warming; heat; meteorological data; residential housing; risk
Abstract:
... One of the effects of climate change is global warming, which will increase cooling demand in buildings. However, scientific literature does not show consensus on the risk of highly insulated buildings being prone to overheating. This paper presents a statistical comparison of two synthetic datasets for current and future climates in sixteen Mediterranean locations. The weather data for the 2050 c ...
DOI:
10.1016/j.apenergy.2019.114110

45. Overview on the applications of three-dimensional printing for rechargeable lithium-ion batteries

Author:
Yang Yang; Wei Yuan; Xiaoqing Zhang; Yuhang Yuan; Chun Wang; Yintong Ye; Yao Huang; Zhiqiang Qiu; Yong Tang
Source:
Applied energy 2020 v.257 pp. 114002
ISSN:
0306-2619
Subject:
commercialization; cost effectiveness; electrochemistry; energy; energy conservation; geometry; lithium batteries; manufacturing; three-dimensional printing
Abstract:
... Rechargeable lithium-ion battery (LIB) is a kind of electrochemical energy storage and conversion device with both high energy and power densities. The real application of various advanced LIBs (e.g., three-dimensional (3D) LIBs, flexible, wearable or customized LIBs) and integrated manufacturing of LIBs or LIB-powered devices depend on specific fabrication processes. However, conventional commerc ...
DOI:
10.1016/j.apenergy.2019.114002

46. Rooftop photovoltaic potential in Istanbul: Calculations based on LiDAR data, measurements and verifications

Author:
Deniz Yildirim; Gürcan Büyüksalih; Ahmet Duran Şahin
Source:
Applied energy 2021 v.304 pp. 117743
ISSN:
0306-2619
Subject:
computer software; digital elevation models; electric energy consumption; electric power; electricity generation; geometry; lidar; solar energy; solar radiation; vegetation
Abstract:
... Usage of solar energy is increasing steadily especially in the rooftop installations of buildings in large cities. This study contains calculations of electrical energy produced by photovoltaic panels placed on roofs of buildings for city of Istanbul using building data and verify calculated results by a mobile measurement system. Three dimensional city model utilizes light detection and ranging d ...
DOI:
10.1016/j.apenergy.2021.117743

47. Simply built microfluidics for fast screening of CO2 foam surfactants and foam model parameters estimation

Author:
Guoqing Jian; Ayrat Gizzatov; Mohammed Kawelah; Zuhair AlYousef; Amr I. Abdel-Fattah
Source:
Applied energy 2021 v.292 pp. 116815
ISSN:
0306-2619
Subject:
carbon dioxide; cost effectiveness; energy; foams; geometry; microfluidic technology; oil fields; oils; surfactants; texture; viscosity
Abstract:
... Surfactant-stabilized CO₂ foam is a promising technique to increase an oil reservoir’s sweep efficiency and therefore produce more oil. The development of successful CO₂ foam formulations requires extensive screening and development of commercially available and new chemicals. In this work, we provide a detailed procedure to build a cost-efficient microfluidic device for rapid prescreening of CO₂ ...
DOI:
10.1016/j.apenergy.2021.116815

48. Static technologies associated with pedaling energy harvesting through rotary transducers, a review

Author:
Maria C. Arellano-Sánchez; Juan Reyes-Reyes; Mario Ponce-Silva; Víctor Olivares-Peregrino; Carlos Astorga-Zaragoza
Source:
Applied energy 2020 v.263 pp. 114607
ISSN:
0306-2619
Subject:
electric power; electronic equipment; energy; geometry; humans; renewable energy sources; transducers (equipment)
Abstract:
... Pedaling energy is a clean and sustainable energy source capable of supplying power to a variety of low power electronic devices. Furthermore, pedaling energy has proven to be a sustainable energy solution, in combination with other renewable energy sources for developing communities. However, currently, the use of this energy is still limited. The main contribution of this paper is to present a r ...
DOI:
10.1016/j.apenergy.2020.114607

49. A comprehensive albedo model for solar energy applications: Geometric spectral albedo

Author:
Hesan Ziar; Furkan Fatih Sönmez; Olindo Isabella; Miro Zeman
Source:
Applied energy 2019 v.255 pp. 113867
ISSN:
0306-2619
Subject:
computer simulation; energy; geometry; irradiation; mathematical models; solar energy; weather
Abstract:
... Albedo is the measure of irradiation energy, which comes from reflecting surroundings. Location, time, geometry, and weather conditions influence the value of albedo. By altering any of the aforementioned parameters, even a little, the albedo value changes. This makes albedo challenging to model. Here we present a mathematical model to cluster all the influential parameters, which affect albedo. W ...
DOI:
10.1016/j.apenergy.2019.113867

50. A comprehensive assessment of alternative absorber-exchanger designs for hybrid PVT-water collectors

Author:
María Herrando; Alba Ramos; Ignacio Zabalza; Christos N. Markides
Source:
Applied energy 2019 v.235 pp. 1583-1602
ISSN:
0306-2619
Subject:
collectors; construction materials; copper; deformation; fluid mechanics; geometry; heat transfer; models; polymers; solar collectors; thermal expansion; thermal stress
Abstract:
... In this paper, 26 alternative absorber-exchanger designs for hybrid PV-Thermal (PVT) solar collectors are proposed and compared against a reference-case, commercial sheet-and-tube PVT collector. The collectors involve different geometric design features based on the conventional sheet-and-tube configuration, and also on a newer flat-box structure constructed from alternative polymeric materials wi ...
DOI:
10.1016/j.apenergy.2018.11.024