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1. Multi-body interaction effect on the energy harvesting performance of a flapping hydrofoil

Author:
Lahooti, Mohsen; Kim, Daegyoum
Source:
Renewable energy 2019 v.130 pp. 460-473
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; kinematics; power generation;     Show all 4 Subjects
Abstract:
... The effect of an upstream bluff body on energy harvesting performance of a heaving and pitching hydrofoil is investigated numerically using a two-dimensional immersed boundary method at Re=1000. The presence of the upstream body changes flow structure around the hydrofoil and enhances efficiency significantly by two mechanisms. Mutual interaction of the vortex shed from the upstream body and the l ...
DOI:
10.1016/j.renene.2018.06.054

2. Experimental study on the vibrational performance and its physical origins of a prototype reversible pump turbine in the pumped hydro energy storage power station

Author:
Zhang, Yuning; Zheng, Xianghao; Li, Jinwei; Du, Xiaoze
Source:
Renewable energy 2019 v.130 pp. 667-676
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; monitoring; power plants; prototypes;     Show all 5 Subjects
Abstract:
... In the present paper, the vibrational performance and its physical origins of a prototype reversible pump turbine in the pumped hydro energy storage power station is experimentally investigated. Specifically, the vibrations of the unit in the X, Y and Z directions of the top cover, the upper and the lower brackets were all measured for three water heads (from 48% to 90% in terms of non-dimensional ...
DOI:
10.1016/j.renene.2018.06.057

3. Particle swarm optimization algorithm for optical-geometric optimization of linear fresnel solar concentrators

Author:
Ajdad, H.; Filali Baba, Y.; Al Mers, A.; Merroun, O.; Bouatem, A.; Boutammachte, N.
Source:
Renewable energy 2019 v.130 pp. 992-1001
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; algorithms; guidelines; solar collectors; system optimization;     Show all 6 Subjects
Abstract:
... In this work we propose the application of the particle swarm optimization (PSO) method to Optical-geometric optimization of linear Fresnel reflector solar concentrators (LFR). The optical-radiative behavior of the system is modeled based on the Ray tracing-Monte Carlo algorithm that calculates the optical performances and the radiative energy collected by the absorber tube. For this system, the a ...
DOI:
10.1016/j.renene.2018.07.001

4. State-of-the-art of hosting capacity in modern power systems with distributed generation

Author:
Ismael, Sherif M.; Abdel Aleem, Shady H.E.; Abdelaziz, Almoataz Y.; Zobaa, Ahmed F.
Source:
Renewable energy 2019 v.130 pp. 1002-1020
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; case studies; electric power; markets; politics;     Show all 6 Subjects
Abstract:
... Currently, renewable energy is rapidly developing across the world in response to technical, economic and environmental developments, as well as political and social initiatives. On the other hand, excessive penetration of distributed generation (DG) systems into electrical networks may lead to various problems and operational limit violations, such as over and under voltages, excessive line losse ...
DOI:
10.1016/j.renene.2018.07.008

5. Comparison of the biogas upgrading methods as a transportation fuel

Author:
Hosseinipour, Sayed Amir; Mehrpooya, Mehdi
Source:
Renewable energy 2019 v.130 pp. 641-655
ISSN:
0960-1481
Subject:
energy,   etc   ; biogas; refrigeration; temperature; transportation;     Show all 5 Subjects
Abstract:
... The aim of this study is investigating and analyzing the water scrubbing, cryogenic separation, amine scrubbing and caustic wash biogas upgrading processes. In order to comparing the upgrading processes, input condition is supposed to be fixed for all of the processes. The results of this study indicate that although amine scrubbing process consumes less power but the required hot utility is highe ...
DOI:
10.1016/j.renene.2018.06.089

6. Less is more in energy conservation and efficiency messaging

Author:
Farrow, Katherine; Grolleau, Gilles; Mzoughi, Naoufel
Source:
Energy policy 2018 v.122 pp. 1-6
ISSN:
0301-4215
Subject:
energy; energy conservation; energy policy,   etc   ; energy use and consumption; psychology;     Show all 5 Subjects
Abstract:
... Campaigns aiming to encourage people to reduce their energy consumption frequently make three well-intentioned but inadvertent mistakes in their communications strategies. These mistakes are driven by a deeply embedded yet often counterproductive popular intuition: that ‘more is better.’ We identify three messaging pitfalls that can result from this assumption, namely that a message will be more p ...
DOI:
10.1016/j.enpol.2018.07.007

7. Linker-Dependent Singlet Fission in Tetracene Dimers

Author:
Korovina, Nadezhda V.; Joy, Jimmy; Feng, Xintian; Feltenberger, Cassidy; Krylov, Anna I.; Bradforth, Stephen E.; Thompson, Mark E.
Source:
Journal of the American Chemical Society 2018 v.140 no.32 pp. 10179-10190
ISSN:
1520-5126
Subject:
energy,   etc   ; isomers;     Show all 2 Subject
Abstract:
... Separation of triplet excitons produced by singlet fission is crucial for efficient application of singlet fission materials. While earlier works explored the first step of singlet fission, the formation of the correlated triplet pair state, the focus of recent studies has been on understanding the second step of singlet fission, the formation of independent triplets from the correlated pair state ...
DOI:
10.1021/jacs.8b04401

8. Extendable multirate real-time simulation of active distribution networks based on field programmable gate arrays

Author:
Wang, Zhiying; Wang, Chengshan; Li, Peng; Fu, Xiaopeng; Wu, Jianzhong
Source:
Applied energy 2018 v.228 pp. 2422-2436
ISSN:
0306-2619
Subject:
energy; solar energy,   etc   ; algorithms; equations;     Show all 4 Subjects
Abstract:
... Real-time simulation of large-scale active distribution networks exhibiting a wide range of time-scales puts forward higher requirements for simulation accuracy and efficiency. This paper presents an extendable method and design for the real-time simulation of active distribution networks utilising high-performance hardware field programmable gate arrays. In the aspect of numerical algorithm, a hi ...
DOI:
10.1016/j.apenergy.2018.07.099

9. DSO-TSO cooperation issues and solutions for distribution grid congestion management

Author:
Hadush, Samson Yemane; Meeus, Leonardo
Source:
Energy policy 2018 v.120 pp. 610-621
ISSN:
0301-4215
Subject:
energy; energy resources,   etc   ; electricity; markets;     Show all 4 Subjects
Abstract:
... The role of DSOs is evolving due to the increasing penetration of intermittent and distributed energy resources in the distribution system. On the one hand, TSOs are accessing flexibility resources connected to the distribution grid. On the other hand, DSOs are actively managing distribution grid congestion, moving away from the conventional fit and forget approach. As a result, the need for DSO-T ...
DOI:
10.1016/j.enpol.2018.05.065

10. Decomposition of energy efficiency and energy-saving potential in China: A three-hierarchy meta-frontier approach

Author:
Feng, Chao; Wang, Miao; Zhang, Yun; Liu, Guan-Chun
Source:
Journal of cleaner production 2018 v.176 pp. 1054-1064
ISSN:
0959-6526
Subject:
energy conservation; energy efficiency,   etc   ; China;     Show all 3 Subject
Abstract:
... Considering both regional heterogeneity and industrial heterogeneity, this paper proposes a three-hierarchy meta-frontier data envelopment analysis (DEA) to decompose energy efficiency and energy-saving potential into three components, i.e., industrial structure, regional balance development, and management. Based on this approach, the paper then analyses the historical evolution and current statu ...
DOI:
10.1016/j.jclepro.2017.11.231

11. Structural and Electronic Properties of Two-Dimensional Organic–inorganic Halide Perovskites and their Stability against Moisture C

Author:
Ma, Zi-Qian; Shao, Yangfan; Wong, Pak Kin; Shi, Xingqiang; Pan, Hui
Source:
Journal of physical chemistry 2018 v.122 no.11 pp. 5844-5853
ISSN:
1932-7455
Subject:
energy; solar energy,   etc   ; adsorption; oxygen;     Show all 4 Subjects
Abstract:
... Organic–inorganic halide perovskites have attracted increasing interest for solar-energy harvesting because of the simple fabrication process, high efficiency, and low cost. In this work, we systematically investigate the structural and electronic properties, and stability of two-dimensional (2D) hybrid organic–inorganic perovskites (HOIPs) based on density-functional-theory calculations. We explo ...
DOI:
10.1021/acs.jpcc.7b06673

12. A new approach to sizing the photovoltaic generator in self-consumption systems based on cost–competitiveness, maximizing direct self-consumption

Author:
Talavera, D.L.; Muñoz-Rodriguez, F.J.; Jimenez-Castillo, G.; Rus-Casas, C.
Source:
Renewable energy 2019 v.130 pp. 1021-1035
ISSN:
0960-1481
Subject:
electric energy consumption; energy; renewable energy sources,   etc   ; ecosystem services; electricity; electricity costs; households; irradiation; profitability; small businesses; Spain;     Show all 11 Subjects
Abstract:
... Applications for sizing Photovoltaic (PV) self-consumption systems have been studied over recent years in order to achieve either an optimization of the cost of energy, the investment cost or any economic profitability criteria. However, PV self-consumption systems at the residential or small business level can be designed with the aims of reducing the electricity consumption from the conventional ...
DOI:
10.1016/j.renene.2018.06.088

13. Comparative study of solar-powered underfloor heating system performance in distinctive climates

Author:
Karimi, Mohammad Sadjad; Fazelpour, Farivar; Rosen, Marc A.; Shams, Mehrzad
Source:
Renewable energy 2019 v.130 pp. 524-535
ISSN:
0960-1481
Subject:
energy; energy use and consumption; renewable energy sources,   etc   ; buildings; cities; climatic factors; computer software; heating systems; solar collectors; Iran;     Show all 10 Subjects
Abstract:
... According to the International Energy Agency, buildings are the largest energy-consuming sector globally, producing over one-third of greenhouse gas emissions in 2013. Renewable energies such as solar can be harnessed to fully or partially meet the energy demands of buildings. In this study, solar thermal collectors are used in a building to provide the hot water required for an underfloor heating ...
DOI:
10.1016/j.renene.2018.06.074

14. Effect of electric field strength on electro-dewatering efficiency for river sediments by horizontal electric field

Author:
Wu, Pan; Shi, Yafei; Wang, Zheng; Xiong, Ziming; Liu, Defu; Gerson, Andrea R.; Pi, Kewu
Source:
The Science of the total environment 2019 v.647 pp. 1333-1343
ISSN:
0048-9697
Subject:
energy,   etc   ; dewatering; electric field; models; rivers; sediments;     Show all 6 Subjects
Abstract:
... A series of electro-dewatering experiments were conducted to explore the effect of sediment cake thickness (1–5 cm) and electric field strength (2–50 V cm⁻¹). The final dry solids content, energy consumption and dewatering productivity were modeled and the validity of the model was tested. It was demonstrated that the electric field strength determines final dry solids content and the power utiliz ...
DOI:
10.1016/j.scitotenv.2018.07.464

15. Absorption heat transformers: Sensitivity study to answer existing discrepancies

Author:
Wakim, Michel; Rivera-Tinoco, Rodrigo
Source:
Renewable energy 2019 v.130 pp. 881-890
ISSN:
0960-1481
Subject:
renewable energy sources,   etc   ; absorption; exergy; heat; temperature;     Show all 5 Subjects
Abstract:
... This work aims at bringing an analysis upon the heterogeneity and the accuracy of results expressed by authors studying absorption heat transformers (AHTs). Existing work is based on specific operating conditions for specific applications, which shows that detailed thermodynamic and sensitivity studies for a wide range of operating conditions are lacking. Hence, this work shows the impact of wide ...
DOI:
10.1016/j.renene.2018.06.111

16. Analysis of the hydrodynamics of four different oscillating wave surge converter concepts

Author:
Gunawardane, S.D.G.S.P.; Folley, M.; Kankanamge, C.J.
Source:
Renewable energy 2019 v.130 pp. 843-852
ISSN:
0960-1481
Subject:
renewable energy sources,   etc   ; hydrodynamics; models; torque;     Show all 4 Subjects
Abstract:
... The fundamental hydrodynamic responses for four different oscillating wave surge converters (OWSCs) variants are analysed and compared. The four variants include; an isolated flap, a flap in front of a wall, a flap inside a caisson with an isolated water chamber behind the flap and a flap inside a caisson with a water chamber behind the flap that is linked to the water outside via to a gap under t ...
DOI:
10.1016/j.renene.2018.06.115

17. A study of the flow field of an axial flow hydraulic turbine with a collection device in an open channel

Author:
Nishi, Yasuyuki; Sato, Genki; Shiohara, Daishi; Inagaki, Terumi; Kikuchi, Norio
Source:
Renewable energy 2019 v.130 pp. 1036-1048
ISSN:
0960-1481
Subject:
renewable energy sources,   etc   ; hydraulic systems; hydrodynamics; turbines;     Show all 4 Subjects
Abstract:
... Axial flow hydraulic turbine with a collection device aims to improve the output using an open channel and concentrating/increasing the volume and velocity of flow. The flow field of this turbine is extremely complex because it has a free surface, and its internal and external flows are mixed. Several such hydraulic turbines are occasionally placed in series against a flow. Thus, it is of utmost i ...
DOI:
10.1016/j.renene.2018.06.114

18. Carbon dioxide (CO2) emissions and economic growth: A systematic review of two decades of research from 1995 to 2017

Author:
Mardani, Abbas; Streimikiene, Dalia; Cavallaro, Fausto; Loganathan, Nanthakumar; Khoshnoudi, Masoumeh
Source:
The Science of the total environment 2019 v.649 pp. 31-49
ISSN:
0048-9697
Subject:
energy policy; energy resources,   etc   ; carbon dioxide; databases; economic development; greenhouse gas emissions; meta-analysis; systematic review;     Show all 8 Subjects
Abstract:
... Understanding the nexus CO2 emissions and economic growth helps economies in formulating energy policies and developing energy resources in sustainable ways. Although during recent years, numerous of the previous studies have been very thoroughly investigated the nexus between economic growth and CO2 emissions, there is a lack of research regarding the qualitative systematic review and meta-analys ...
DOI:
10.1016/j.scitotenv.2018.08.229

19. Analytical model for heat transfer between vertical fractures in fractured geothermal reservoirs during water injection

Author:
Abbasi, Mahdi; Mansouri, Mehrshad; Daryasafar, Amin; Sharifi, Mohammad
Source:
Renewable energy 2019 v.130 pp. 73-86
ISSN:
0960-1481
Subject:
energy; renewable energy sources,   etc   ; commercialization; convection; equations; models; power generation; temperature;     Show all 8 Subjects
Abstract:
... In recent years, the demand for energy has vastly increased due to rapid commercialization. This increasing requirement has put a further strain on the conventional power generation units. In this paper, the problem of water injection into a fractured geothermal reservoir in Cartesian coordinate is considered and an exact analytical solution has been presented to describe the transient temperature ...
DOI:
10.1016/j.renene.2018.06.043

20. Annual performance of subcritical Rankine cycle coupled to an innovative particle receiver solar power plant

Author:
Reyes-Belmonte, M.A.; Sebastián, A.; Spelling, J.; Romero, M.; González-Aguilar, J.
Source:
Renewable energy 2019 v.130 pp. 786-795
ISSN:
0960-1481
Subject:
solar energy; thermal energy,   etc   ; annuals; computer software; electricity; heat transfer; power plants; salts; solar collectors; temperature;     Show all 10 Subjects
Abstract:
... Concentrated solar power plants using molten salts as heat transfer and storage fluid have emerged as the preferred commercial solution for solar thermal electricity in central receiver technology. Despite their ability to store large amounts of thermal energy and efficient receiver designs, further efficiency improvements are constrained by tight temperature restrictions when using molten salts ( ...
DOI:
10.1016/j.renene.2018.06.109