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1. Novel dynamic equivalent circuit model of integrated energy systems

Author:
Jing Chen; Fan Li; Haoran Li; Bo Sun; Chenghui Zhang; Shuai Liu
Source:
Energy 2023 v.262 pp. 125266
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; electricity; energy; models;     Show all 4 Subjects
Abstract:
... With the transformation from individual energy systems to integrated energy systems (IES), equivalent circuit IES modeling is developed to represent the heat and electricity consistently for coordinated analysis, control and optimization. However, physical properties of equivalent parameters are a mismatch, and the key operation characteristics, including dynamics and coupling, have not yet been f ...
DOI:
10.1016/j.energy.2022.125266

2. Effect of flow direction on heat transfer characteristics of supercritical CO2 in a heating serpentine micro-tube

Author:
Yong Xu; Zhengming Yi
Source:
Energy 2023 v.262 pp. 125474
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; carbon dioxide; energy; gravity; mass transfer; serpentine;     Show all 6 Subjects
Abstract:
... The combined effect of gravitational buoyancy, centrifugal force and centrifugal buoyancy on the heat transfer of supercritical CO₂ in a serpentine micro-tube under different flow directions is numerically studied. The comprehensive heat transfer performance in the four flow directions is vertical upward flow (VU), horizontal flow vertical bend (HV), horizontal flow horizontal bend (HH) and vertic ...
DOI:
10.1016/j.energy.2022.125474

3. Effect of lossy thin-walled cylindrical food containers on microwave heating performance

Author:
Huacheng Zhu; Junhao Su; Fengming Yang; Yuping Wu; Jinghua Ye; Kama Huang; Yang Yang
Source:
Journal of food engineering 2023 v.337 pp. 111232
ISSN:
0260-8774
Subject:
heat transfer,   etc   ; energy; microwave treatment; optics; porous media; temperature;     Show all 6 Subjects
Abstract:
... Cylindrical containers are commonly used in microwave food processing applications. However, due to the shape effect, microwave energy mainly focuses in the center of the sample within the container, leading to a nonuniform temperature gradient between the inner and outer layers of the sample. Employing a lossy container may be an effective method to address this issue because the heat conduction ...
DOI:
10.1016/j.jfoodeng.2022.111232

4. Coupled system model analysis for a small modular reactor cogeneration (combined heat and power) application

Author:
Seong Woo Kang; Man-Sung Yim
Source:
Energy 2023 v.262 pp. 125481
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; carbon; economic feasibility; energy; fossil fuels; heat exchangers; markets; models;     Show all 8 Subjects
Abstract:
... The goal of this research is to develop a flexible, simple, and accurate coupled system model for nuclear combined heat and power cycle (CHP) to investigate various heat-source applications of a small modular reactor (SMR) based on off-design component models. A CHP heat exchanger system model was developed and coupled with the SMR secondary system model for a typical SMR-CHP analysis. The coupled ...
DOI:
10.1016/j.energy.2022.125481

5. An energy self-circulation system based on the wearable thermoelectric harvester for ART driver monitoring

Author:
Jiangfan Chen; Zheng Fang; Ali Azam; Xiaoping Wu; Zutao Zhang; Linhai Lu; Dongyang Li
Source:
Energy 2023 v.262 pp. 125472
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; electric potential difference; electric power; foams; humans; wind speed; China;     Show all 7 Subjects
Abstract:
... With the popularity and application of Autonomous-rail rapid transit in China, the status of drivers has also attracted more attention to reducing the number of accidents on complex urban roads. The previously used sensors to monitor driver status require external power, limiting the further development and application of the sensor. This paper proposes a sensor energy self-circulation system base ...
DOI:
10.1016/j.energy.2022.125472

6. Novel sandwich-like membrane with hydrophilic-omniphobic-hydrophilic structure for sustainable water recovery in membrane distillation

Author:
Long-Fei Ren; Jun Li; Yubo Xu; Jiahui Shao; Yiliang He
Source:
Resources, conservation, and recycling 2023 v.188 pp. 106646
ISSN:
0921-3449
Subject:
heat transfer,   etc   ; distillation; emulsions; energy; hexadecane; sodium dodecyl sulfate; temperature; water vapor;     Show all 8 Subjects
Abstract:
... Membrane distillation (MD) is attractive for water recovery from surfactant-stabilized oil-in-water emulsion due to its unique characteristics. To address the membrane fouling and wetting issues, a novel hydrophilic-omniphobic-hydrophilic sandwich-like membrane (PFZP) was firstly developed. Top PDA skin layer induced the hydration shell facing feed, which endowed membrane with high energy barriers ...
DOI:
10.1016/j.resconrec.2022.106646

7. Design optimization of a district heating and cooling system with a borehole seasonal thermal energy storage

Author:
Massimo Fiorentini; Philipp Heer; Luca Baldini
Source:
Energy 2023 v.262 pp. 125464
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; carbon; case studies; electricity; models; prices; seasonal variation; temperature; thermal energy;     Show all 9 Subjects
Abstract:
... The optimal design of borehole thermal energy storage systems can ensure their techno-economical goals are met. Current design optimization methods either employ detailed modelling unsuitable for numerical optimization or use simplified models that do not consider operational conditions. This paper proposes an optimization-oriented model and a non-convex optimization formulation that, differently ...
DOI:
10.1016/j.energy.2022.125464

8. S–CO2 cooling heat transfer mechanism based on pseudo-condensation and turbulent field analysis

Author:
Y.H. Fan; G.H. Tang; Q. Sheng; X.L. Li; D.L. Yang
Source:
Energy 2023 v.262 pp. 125470
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; cooling; energy; gravity; liquids; mass transfer; specific heat; surface tension; viscosity;     Show all 9 Subjects
Abstract:
... The supercritical-CO₂ (S–CO₂) cooler is one of the main components in S–CO₂ power system. This work aims at revealing the cooling mechanism of S–CO₂ under wide working conditions to assist the S–CO₂ cooler design. The pseudo-condensation is proposed with the analogy between supercritical cooling and subcritical condensation. From the pseudo-condensation and the traditional turbulent field analysis ...
DOI:
10.1016/j.energy.2022.125470

9. Stretching induced alignment of graphene nanoplatelets in polyurethane films for superior in-plane thermal conductivity and electromagnetic interference shielding

Author:
Dineshkumar Mani; Minh Canh Vu; Choong-Sun Lim; Jun-Beom Kim; Tae-Hyeong Jeong; Hye Jin Kim; Md Akhtarul Islam; Jung-Hyurk Lim; Kyung-Min Kim; Sung-Ryong Kim
Source:
Carbon 2023 v.201 pp. 568-576
ISSN:
0008-6223
Subject:
heat transfer,   etc   ; carbon; electromagnetic interference; electron transfer; electronics; heat tolerance; nanocomposites; polyurethanes; thermal conductivity;     Show all 9 Subjects
Abstract:
... The rapid innovation of flexible smart electronics has increased the demand for flexible thermally conductive films with the high performance of electromagnetic interference shielding (EMI). This study focuses on graphene nanoplatelets/polyurethane (GnP/PU) films that were fabricated utilizing the solution casting approach. The stretching-induced alignment method was then used to align the GnP she ...
DOI:
10.1016/j.carbon.2022.09.047

10. Exergy, economic, and exergoenvironmental analyses of new combined heat and power process based on mechanism analysis of working fluid screening

Author:
Lili Wang; Li Xia; Chengyun Li; Yuan Tian; Junfeng Teng; Xiaoyan Sun; Shuguang Xiang
Source:
Energy 2023 v.262 pp. 125308
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; chemical analysis; economic analysis; electricity; equipment; exergy; hydrogen bonding; quantum mechanics; steam; temperature;     Show all 10 Subjects
Abstract:
... A screening strategy was established for obtaining an optimal working fluid (R1234yf) based on quantum chemical analysis. The weak hydrogen bond interactions of R1234yf enhanced the performance of the organic Rankine cycle. The proposed process produced 49.28 MW of electricity and 0.5 MPa of steam. The optimal process was evaluated by multifactor analysis of exergy, economic, and exergoenvironment ...
DOI:
10.1016/j.energy.2022.125308

11. Catalyst-scale investigation of polydispersity effect on thermophysical properties in a commercial-scale catalytic MTO fluidized bed reactor

Author:
Zhanghao Wan; Shiliang Yang; Jianhang Hu; Hua Wang
Source:
Energy 2023 v.262 pp. 125401
ISSN:
0360-5442
Subject:
heat transfer,   etc   ; Reynolds number; catalysts; energy; models; particle size distribution; specific heat; temperature; thermal conductivity; transportation; viscosity;     Show all 11 Subjects
Abstract:
... The methanol-to-olefin (MTO) process is commercialized worldwide, yet the understanding of in-furnace phenomena is still lacking. Accordingly, this work explores the multiphase flow and thermochemical characteristics in a commercial-scale MTO fluidized bed reactor using a three-dimensional multiphase particle-in-cell model. After model validations, the intrinsic relationship of solid transportatio ...
DOI:
10.1016/j.energy.2022.125401

12. Polypyrrole coated carbon nanotube aerogel composite phase change materials with enhanced thermal conductivity, high solar-/electro- thermal energy conversion and storage

Author:
Zhang Tao; Hanying Zou; Min Li; Shibing Ren; Jianhang Xu; Jing Lin; Mu Yang; Yanhui Feng; Ge Wang
Source:
Journal of colloid and interface science 2023 v.629 pp. 632-643
ISSN:
0021-9797
Subject:
heat transfer,   etc   ; aerogels; carbon; carbon nanotubes; energy conversion; molecular dynamics; paraffin wax; phase transition; polymerization; pyrroles; thermal conductivity; thermal energy; vapors; vibration;     Show all 14 Subjects
Abstract:
... Phase change materials (PCMs) have been widely investigated as promising thermal management materials due to their high thermal storage capacity, satisfactory heat transfer rate and multi-responsive energy conversion and storage characteristics. In this work, a shape-stabilized solar-/electro- responsive thermal energy capture and storage system is proposed involving polypyrrole (PPy)-deposited ca ...
DOI:
10.1016/j.jcis.2022.09.103

13. Effect of pasteurization on color, ascorbic acid and lycopene of crushed tomato: A computational study with experimental validation

Author:
E.E. Badin; M.M. Mercatante; R.H. Mascheroni; R. Quevedo-Leon; A. Ibarz; P.D. Ribotta; A.R. Lespinard
Source:
Journal of food engineering 2023 v.337 pp. 111218
ISSN:
0260-8774
Subject:
heat transfer coefficient,   etc   ; ascorbic acid; color; convection; finite element analysis; glass; lycopene; models; pasteurization; specific heat; temperature profiles; thermal conductivity; thermal degradation; tomatoes;     Show all 14 Subjects
Abstract:
... Pasteurization of crushed tomato in glass bottles was evaluated using a multiphysics model, aiming to understand the temperature profiles and quality losses during the heating and cooling stages of the process. In order to rigorously simulate the pasteurization process, a finite element model was built using experimentally measured product and heat transfer parameters (thermal conductivity, densit ...
DOI:
10.1016/j.jfoodeng.2022.111218

14. Improving cooling performance and robustness of NGV endwall film cooling design using micro-scale ribs considering incidence effects

Author:
Zhiduo Wang; Zhenping Feng; Xiaobo Zhang; Jingbo Peng; Fei Zhang; Xing Wu
Source:
Energy 2022 v.253 pp. 124203
ISSN:
0360-5442
Subject:
heat transfer; heat transfer coefficient,   etc   ; energy; horses;     Show all 4 Subjects
Abstract:
... Modern lean-burn combustors generate aggressive swirling flow at the entrance of high-pressure turbine nozzle guide vane (NGV), and lead to cooling performance deterioration of the NGV film cooling system. Improving the cooling performance of NGV becomes a delicate task for the designers. In this study, micro-scale ribs with novel arrangement method were applied to improve the cooling effectivenes ...
DOI:
10.1016/j.energy.2022.124203

15. Influence of external magnetic manipulation on thermal transport characteristics of the bubble-slug flow of ferro-nanocolloids

Author:
Ram Krishna Shah; Sameer Khandekar
Source:
Colloids and surfaces 2022 v.646 pp. 128936
ISSN:
0927-7757
Subject:
heat transfer; heat transfer coefficient,   etc   ; liquids; magnetic fields; slugs;     Show all 5 Subjects
Abstract:
... Bubble-slug flows are an important two-phase flow pattern known for their superior transport characteristics, which predominantly depend on the phase distribution (bubble and slug lengths). In the present work, it is shown that the thermal transport characteristics of such flows can be substantially enhanced and tuned as per requirement by utilizing ferro-nanocolloids or ferrofluids as the primary ...
DOI:
10.1016/j.colsurfa.2022.128936

16. Enhancement of Boiling with Scalable Sandblasted Surfaces

Author:
Youngsup Song; Chi Wang; Daniel J. Preston; Guanyu Su; Md Mahamudur Rahman; Hyeongyun Cha; Jee Hyun Seong; Bren Philips; Matteo Bucci; Evelyn N. Wang
Source:
ACS applied materials & interfaces 2022 v.14 no.7 pp. 9788-9794
ISSN:
1944-8252
Subject:
heat transfer; heat transfer coefficient,   etc   ; capillarity; power generation; silicon; surface roughness;     Show all 6 Subjects
Abstract:
... Surface engineering has been leveraged by researchers to enhance boiling heat transfer performance, with benefits ranging from improved thermal management to more efficient power generation. While engineered surfaces fabricated using cleanroom processes have shown promising boiling results, scalable methods for surface engineering are still limited despite most real-world industry-scale applicatio ...
DOI:
10.1021/acsami.1c22207

17. Transverse wedge-shaped rib roughened solar air heater (SAH) - Exergy based experimental investigation

Author:
Kapil Chaudhri; J.L. Bhagoria; Vikash Kumar
Source:
Renewable energy 2022 v.184 pp. 1150-1164
ISSN:
0960-1481
Subject:
heat transfer; heat transfer coefficient,   etc   ; air; exergy; mass flow; roughness; solar heaters;     Show all 7 Subjects
Abstract:
... The major challenge faced in heat transfer augmentation in roughened solar air duct is the formation of viscous sublayer near heat transferring surface. The present investigation uses main air supply flow under roughened duct mounted with transverse wedge shaped roughened absorbers for the heated air jet delivery. This technique is prolific as it provides the ambient cool air to the entire absorbe ...
DOI:
10.1016/j.renene.2021.12.005

18. Effect of rib diameter on flow boiling heat transfer with staggered rib arrays in a heat sink

Author:
Di Qi; Jing He; Yongsheng Xu; Mei Lin; Qiuwang Wang
Source:
Energy 2022 v.239 pp. 122323
ISSN:
0360-5442
Subject:
heat transfer; heat transfer coefficient,   etc   ; electronic equipment; energy; mass transfer; models; temperature;     Show all 7 Subjects
Abstract:
... With the integration development of electronic equipment, a more compact and higher efficiency heat dissipation system is required to meet its cooling demands. In this work, the design of ribbed channel heat sink in a limited volume to maximize its heat transfer capacity is analyzed. Two-phase flow boiling performance of rib diameters ranging from D = 1–10 mm is characterized using the Mixture mul ...
DOI:
10.1016/j.energy.2021.122323

19. New general models for condensation heat transfer coefficient of carbon dioxide in smooth tubes by intelligent and least square fitting approaches

Author:
M.A. Moradkhani; S.H. Hosseini; M. Mansouri; H. Omidian Zad; M. Karami; G. Ahmadi
Source:
Journal of cleaner production 2022 v.330 pp. 129762
ISSN:
0959-6526
Subject:
heat transfer; heat transfer coefficient,   etc   ; carbon dioxide; databases; neural networks; normal distribution;     Show all 6 Subjects
Abstract:
... The heat transfer characteristics of carbon dioxide (R744) as a natural and safe refrigerant are quite different from the other refrigerants due to the CO2 unique physical properties. So, it is essential to develop accurate general models for predicting the heat transfer coefficient (HTC) of CO2 condensation inside smooth tubes. In this study, an extensive experimental databank for the CO2 refrige ...
DOI:
10.1016/j.jclepro.2021.129762

20. Experimental study on heat transfer and hydrodynamics of a concentric double-pipe pulsed fluidized bed using microencapsulated phase change material and sand

Author:
Mohammad Reza Assari; Milad Setareh; Hassan Basirat Tabrizi; Amin Salehianfard
Source:
Powder technology 2022 v.409 pp. 117832
ISSN:
0032-5910
Subject:
heat transfer; heat transfer coefficient,   etc   ; air; fluidized beds; hydrodynamics; microencapsulation; phase transition; sand;     Show all 8 Subjects
Abstract:
... This paper presents an experimental study on the heat transfer and hydrodynamic of a concentric double-pipe gas-solid pulsed fluidized bed filled in outer tube with microencapsulated phase change material and inner tube with sand. The effect of flow velocity, frequency and bed height are investigated on the heat transfer. Experiments are carried out at frequency in the range of 1 to 5Hz with the b ...
DOI:
10.1016/j.powtec.2022.117832