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1. Investigation on the temperature sensitivity of the S-CO2 Brayton cycle efficiency

Author:
Wang, Lin; Pan, Liang-ming; Wang, Junfeng; Chen, Deqi; Huang, Yanping; Hu, Lian
Source:
Energy 2019 v.178 pp. 739-750
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; temperature; thermodynamics;     Show all 3 Subjects
Abstract:
... With the development of compact heat exchangers in the past few decades, S-CO2 recompression Brayton cycle has attracted much attention. However, the cycle efficiency of the traditional S-CO2 recompression Brayton cycle is sensitive to the compressor inlet temperature, which limits the application of the cycle. According to the property of S-CO2, rapid property change appears in different temperat ...
DOI:
10.1016/j.energy.2019.04.100

2. Outlet temperatures of a slinky-type Horizontal Ground Heat Exchanger with the atmosphere-soil interaction

Author:
Tang, Fujiao; Nowamooz, Hossein
Source:
Renewable energy 2020 v.146 pp. 705-718
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; heat transfer; renewable energy sources; soil; surface temperature;     Show all 5 Subjects
Abstract:
... Generally, a Horizontal Ground Heat Exchanger (HGHE) is installed in shallow depths, which can influence the land surface temperature during its operation period, especially when a high heat demand is required. Consequently, the existing methods of using time-varying land surface temperatures are not sufficient for the HGHE simulations. In this paper, a numerical framework considering the atmosphe ...
DOI:
10.1016/j.renene.2019.07.029

3. Potentials of porous materials for energy management in heat exchangers – A comprehensive review

Author:
Rashidi, Saman; Kashefi, Mohammad Hossein; Kim, Kyung Chun; Samimi-Abianeh, Omid
Source:
Applied energy 2019 v.243 pp. 206-232
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; energy; porous media;     Show all 3 Subjects
Abstract:
... Heat exchangers are recognized as popular thermal devices with various and important applications in industrial energy systems. Many techniques were employed in order to manage the energy in these devices. Among these techniques, porous materials with high potentials for the energy management and enhancing the thermal performances in heat exchangers were employed widely. This paper reviews recent ...
DOI:
10.1016/j.apenergy.2019.03.200

4. Conventional and advanced exergy analysis of a grid connected underwater compressed air energy storage facility

Author:
Ebrahimi, Mehdi; Carriveau, Rupp; Ting, David S.-K.; McGillis, Andrew
Source:
Applied energy 2019 v.242 pp. 1198-1208
ISSN:
0306-2619
Subject:
heat exchangers,   etc   ; air; exergy; Canada;     Show all 4 Subjects
Abstract:
... A data driven exergy analysis has been conducted for the first known grid connected Underwater Compressed Air Energy Storage facility, located in Toronto, Canada. Further to examining the plant through conventional exergy analysis, results were enhanced by splitting exergy destruction rates into avoidable and unavoidable, as well as endogenous and exogenous parts via advanced exergy analysis. The ...
DOI:
10.1016/j.apenergy.2019.03.135

5. Effects of tube shapes on the performance of recuperative and regenerative heat exchangers

Author:
Tran, Ngoctan; Wang, Chi-Chuan
Source:
Energy 2019 v.169 pp. 1-17
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; heat transfer; prediction;     Show all 3 Subjects
Abstract:
... In the present work, the effects of tube shapes on the heat transfer and fluid flow characteristics of the shell-and-tube heat exchangers –including square, rectangular, circular, elliptical, equilateral- and isosceles-triangular shapes –are numerically investigated in detail. Six parameters –including (1) rectangular-tube ratios (⍺ = tube height/width), (2) triangular-tube ratios (β = two-side ed ...
DOI:
10.1016/j.energy.2018.11.127

6. Improving the thermal performance of ground air heat exchanger system using sand-bentonite (in dry and wet condition) as backfilling material

Author:
Agrawal, Kamal Kumar; Misra, Rohit; Agrawal, Ghanshyam Das
Source:
Renewable energy 2020 v.146 pp. 2008-2023
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; air; air flow; backfilling; cooling; heat transfer; renewable energy sources; soil thermal properties;     Show all 8 Subjects
Abstract:
... Thermal performance of ground-air heat exchanger (GAHE) depends on the rate of heat transfer between air and soil, which is governed by thermal properties of soil surrounding the GAHE pipe. Soil thermal properties around GAHE pipe can be improved either by increasing its moisture contents or by using some thermally enhanced backfilling materials. In the present study experimentally investigates th ...
DOI:
10.1016/j.renene.2019.08.044

7. To study the effect of different parameters on the thermal performance of ground-air heat exchanger system: In situ measurement

Author:
Agrawal, Kamal Kumar; Misra, Rohit; Agrawal, Ghanshyam Das
Source:
Renewable energy 2020 v.146 pp. 2070-2083
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; air flow; air temperature; cooling; renewable energy sources; soil water content; water content;     Show all 7 Subjects
Abstract:
... In the present experimental work, two identical real field experimental setups (with dry soil and wet soil) of ground-air heat exchanger (GAHE) have been developed in order to evaluate the influence of change in inlet air temperature, airflow velocity, diameter of pipe and soil moisture content on the thermal performance of GAHE system. Influence of these parameters on the required pipe length to ...
DOI:
10.1016/j.renene.2019.08.065

8. Effect of inner pipe type on the heat transfer performance of deep-buried coaxial double-pipe heat exchangers

Author:
Li, Chao; Guan, Yanling; Yang, Ruitao; Lu, Xiong; Xiong, Wenxue; Long, Anjie
Source:
Renewable energy 2020 v.145 pp. 1049-1060
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; heat transfer; mathematical models; pipes; renewable energy sources; temperature; water flow;     Show all 7 Subjects
Abstract:
... In the present study, based on the currently used deep-buried coaxial double-pipe heat exchange systems for closed loop heat extraction, the influence of several inner pipe types on the heat transfer performance of buried pipe systems is analyzed. The deep-buried coaxial double-pipe with a smooth inner pipe used in current practice was taken as an example, and a full-scale three-dimensional (3D) n ...
DOI:
10.1016/j.renene.2019.06.101

9. Superposition of the single point source solution to generate temperature response factors for geothermal piles

Author:
Fossa, M.; Priarone, A.; Silenzi, F.
Source:
Renewable energy 2020 v.145 pp. 805-813
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; analytical methods; buildings; drilling; enthalpy; heat; heat pumps; models; pipes; renewable energy sources; temperature;     Show all 11 Subjects
Abstract:
... Geothermal piles are a very promising technique to exploit the low enthalpy resource for ground coupled heat pumps. In fact, they are heat exchangers integrated in the foundation structures of the buildings, with reduced need in term of ground surface availability and diminished drilling costs. Unfortunately, to evaluate the ground thermal response to their presence it is not possible to use class ...
DOI:
10.1016/j.renene.2019.05.011

10. Multi-objective optimization of propane pre-cooled mixed refrigerant (C3MR) LNG process

Author:
Primabudi, Eko; Morosuk, Tatiana; Tsatsaronis, George
Source:
Energy 2019 v.185 pp. 492-504
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; algorithms; exergy; precooling; propane;     Show all 5 Subjects
Abstract:
... Multi-Objective optimization of propane pre-cooled mixed refrigerant (C3MR) LNG process is performed with two objective functions: (a) maximizing the exergy efficiency and (b) minimizing the total cost of the product. The process simulation is developed using Aspen Plus, while the feasible solutions are produced using non-dominated sorting genetic algorithm II (NSGA-II). The results from exergy-ba ...
DOI:
10.1016/j.energy.2019.07.035

11. Simulation of particle deposition in a plate-fin heat exchanger using a particle deposition model with a random function method

Author:
Xu, Zhiming; Sun, Aodi; Han, Zhimin; Yu, Xiaoyan; Zhang, Yu
Source:
Powder technology 2019 v.355 pp. 145-156
ISSN:
0032-5910
Subject:
heat exchangers,   etc   ; models; particle size; temperature;     Show all 4 Subjects
Abstract:
... The particle deposition characteristics of plate-fin heat exchangers were studied using a particle deposition model with a random function method. The effects of the inlet velocity, particle size, and temperature difference on particle deposition and the distribution of the particles deposited in plate-fin heat exchangers were investigated. The simulation results showed that the thermal diffusion– ...
DOI:
10.1016/j.powtec.2019.07.031

12. Multi-objective energy and exergy optimization of different configurations of hybrid earth-air heat exchanger and building integrated photovoltaic/thermal system

Author:
Li, Z.X.; Shahsavar, Amin; Al-Rashed, Abdullah A.A.A.; Kalbasi, Rasool; Afrand, Masoud; Talebizadehsardari, Pouyan
Source:
Energy conversion and management 2019 v.195 pp. 1098-1110
ISSN:
0196-8904
Subject:
heat exchangers,   etc   ; air; cold; exergy; mass flow;     Show all 5 Subjects
Abstract:
... Multi-objective optimization of a hybrid building integrated photovoltaic/thermal (BIPVT) system and earth-air heat exchanger (EAHE) is studied. According to the position of the BIPVT and EAHE systems, two different configurations (i.e. configuration A and configuration B) are examined. In the heating mode of the configuration A, the cold outdoor air is twice preheated by passing through the EAHE ...
DOI:
10.1016/j.enconman.2019.05.074

13. Design of plate-fin surfaces for multi-fluid heat exchanger applications

Author:
García-Castillo, Jorge L.; Picón-Núñez, Martín
Source:
Energy 2019 v.181 pp. 294-306
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; case studies; enthalpy; heat transfer;     Show all 4 Subjects
Abstract:
... Amidst the various design approaches available for the design of plate-fin heat exchangers for multi-fluid applications, are those based on the segmentation of the exchanger length into blocks that correspond to the enthalpy intervals in the Composite Curves. Such methods are characterized by three main features: identification of exchanger sections, surface selection from among the available type ...
DOI:
10.1016/j.energy.2019.05.174

14. Experimental study of the organic rankine cycle under different heat and cooling conditions

Author:
Zhang, Hong-Hu; Xi, Huan; He, Ya-Ling; Zhang, Yu-Wen; Ning, Bo
Source:
Energy 2019 v.180 pp. 678-688
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; evaporation; heat; temperature; working conditions;     Show all 5 Subjects
Abstract:
... A small-scaled organic Rankine cycle (ORC) system using R123 as working fluid was experimentally investigated. For ORC and regenerative organic Rankine cycle (RORC), the impacts of the evaporating and condensing temperatures on the performances of main components (i.e., the expander, the pump, and heat exchangers) and the system were tested. The comparison between these two systems under identical ...
DOI:
10.1016/j.energy.2019.05.072

15. Reduced Plate Height of 1.65 on a 20 × 3 mm Column Packed with 1.8 µm Particles in Supercritical Fluid Chromatography (SFC)

Author:
Berger, Terry A.
Source:
Chromatographia 2019 v.82 no.6 pp. 971-974
ISSN:
0009-5893
Subject:
heat exchangers,   etc   ; supercritical fluid chromatography; temperature;     Show all 3 Subjects
Abstract:
... The plumbing of a commercial supercritical fluid chromatograph was modified by replacing all the connector tubing with the shortest possible lengths (65 cm) of 75 µm ID tubes. Heat exchangers controlling column temperatures and column outlet temperature were bypassed. The UV detector flow cell was replaced with an experimental cell with a 75 µm inlet tube, and a 2 µL internal volume. All these ste ...
DOI:
10.1007/s10337-019-03722-z

16. Optimal Design of Double Pipe Heat Exchanger Structures

Author:
Peccini, Alice; Lemos, Julia C.; Costa, André L. H.; Bagajewicz, Miguel J.
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.27 pp. 12080-12096
ISSN:
1520-5045
Subject:
heat exchangers,   etc   ; chemistry; models; process design; streams;     Show all 5 Subjects
Abstract:
... This paper investigates the design optimization of double pipe heat exchanger using mathematical programming. The heat exchanger area is minimized and the thermo-fluid dynamic conditions are considered for the use of the right transport correlations, together with design specifications, such as, maximum pressure drops and minimum excess area. The modular nature of this kind of heat exchanger and t ...
DOI:
10.1021/acs.iecr.9b01536

17. Effect of flow losses in heat exchangers on the performance of organic Rankine cycle

Author:
Sun, Hongchuang; Qin, Jiang; Hung, Tzu-Chen; Huang, Hongyan; Yan, Peigang; Lin, Chih-Hung
Source:
Energy 2019 v.172 pp. 391-400
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; evaporation; exergy; pipes; pumps;     Show all 5 Subjects
Abstract:
... No pressure loss or constant pressure loss were usually used in theoretical study of organic Rankine cycle (ORC). However, in a practical cycle, pressure losses will occur in heat exchangers and pipes. The pressure losses can influence the evaporating and condensing process and further influence the overall performance of ORC. In this study, the flow loss coefficients of evaporator and condenser a ...
DOI:
10.1016/j.energy.2019.01.131

18. Design of heat integrated water networks with multiple contaminants

Author:
Zhao, Hui-Peng; Yang, Yang; Liu, Zhi-Yong
Source:
Journal of cleaner production 2019 v.211 pp. 530-536
ISSN:
0959-6526
Subject:
heat exchangers,   etc   ; cost analysis; equipment design; heat;     Show all 4 Subjects
Abstract:
... The heat integrated water networks have the features of complex network structure and high costs. To overcome the problems, this paper presents a new design method for heat integrated water networks with simple structure and low costs. The proposed method includes two steps: the water-using network is designed first by considering the concentration specifications of water-using processes, which is ...
DOI:
10.1016/j.jclepro.2018.11.210

19. A new heuristic algorithm with the step size adjustment strategy for heat exchanger network synthesis

Author:
Liu, Pu; Cui, Guomin; Xiao, Yuan; Chen, Jiaxing
Source:
Energy 2018 v.143 pp. 12-24
ISSN:
0360-5442
Subject:
heat exchangers,   etc   ; algorithms; hens;     Show all 3 Subjects
Abstract:
... The major difficulty in the heat exchanger network synthesis (HENS) is dealing with the simultaneous optimization of large-scale continuous and integer variables. Heuristic algorithms are used in HENS due to their efficient global search ability and the step size (ΔL) constitutes one of the critical concepts in it. In this paper, by analyzing the influence of ΔL in Random Walk Algorithm with Compu ...
DOI:
10.1016/j.energy.2017.10.115

20. Novel solar PV/Thermal collector design for the enhancement of thermal and electrical performances

Author:
Rejeb, Oussama; Gaillard, Leon; Giroux-Julien, Stéphanie; Ghenai, Chaouki; Jemni, Abdelmajid; Bettayeb, Maamar; Menezo, Christophe
Source:
Renewable energy 2020 v.146 pp. 610-627
ISSN:
0960-1481
Subject:
heat exchangers,   etc   ; coatings; cooling; electric power; heat tolerance; models; renewable energy sources; solar cells; solar collectors; surface area; temperature;     Show all 11 Subjects
Abstract:
... The main objective of this study is to develop a novel photovoltaic thermal collector (PVT) to improve the electrical and thermal efficiencies of the solar collector. The goal is to maximize the electrical power and minimize the thermal losses of the solar panel. A novel photovoltaic thermal collector is designed and tested. The new PVT collector includes: (1) An optical anti-reflective and low-em ...
DOI:
10.1016/j.renene.2019.06.158