Experimental investigation and comparative performance analysis of a compact finned-tube heat exchanger uniformly filled with a phase change material for thermal energy storage

2018 ◽  
Vol 165 ◽  
pp. 137-151 ◽  
Author(s):  
Mohamed El Habib Amagour ◽  
Adil Rachek ◽  
Mounir Bennajah ◽  
Mohamed Ebn Touhami
Keyword(s):  
Experimental Investigation ◽  
Energy Storage ◽  
Heat Exchanger ◽  
Performance Analysis ◽  
Thermal Energy ◽  
Finned Tube ◽  
Comparative Performance ◽  
Tube Heat Exchanger ◽  
Finned Tube Heat Exchanger ◽  
Change Material

scholarly journals Indoor Solar Thermal Energy Saving Time with Phase Change Material in a Horizontal Shell and Finned-Tube Heat Exchanger

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
S. Paria ◽  
A. A. D. Sarhan ◽  
M. S. Goodarzi ◽  
S. Baradaran ◽  
B. Rahmanian ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Heat Exchanger ◽  
Thermal Energy ◽  
Finned Tube ◽  
Heat Transfer Fluid ◽  
Solar Thermal Energy ◽  
Tube Heat Exchanger ◽  
Finned Tube Heat Exchanger ◽  
Change Material

An experimental as well as numerical investigation was conducted on the melting/solidification processes of a stationary phase change material (PCM) in a shell around a finned-tube heat exchanger system. The PCM was stored in the horizontal annular space between a shell and finned-tube where distilled water was employed as the heat transfer fluid (HTF). The focus of this study was on the behavior of PCM for storage (charging or melting) and removal (discharging or solidification), as well as the effect of flow rate on the charged and discharged solar thermal energy. The impact of the Reynolds number was determined and the results were compared with each other to reveal the changes in amount of stored thermal energy with the variation of heat transfer fluid flow rates. The results showed that, by increasing the Reynolds number from 1000 to 2000, the total melting time decreases by 58%. The process of solidification also will speed up with increasing Reynolds number in the discharging process. The results also indicated that the fluctuation of gradient temperature decreased and became smooth with increasing Reynolds number. As a result, by increasing the Reynolds number in the charging process, the theoretical efficiency rises.

scholarly journals Designs of PCM based heat exchangers constructions for thermal energy storage tanks – examples and case study for selected design

2018 ◽  
Vol 70 ◽  
pp. 01010
Author(s):  
Marta Kuta ◽  
Dominika Matuszewska ◽  
Tadeusz Michał Wójcik
Keyword(s):  
Energy Storage ◽  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
New Technologies ◽  
Tube Heat Exchanger ◽  
Change Material

Increasing energy consumption in residential and public buildings requires development of new technologies for thermal energy production and storage. One of possibilities for the second listed need is the use of phase change materials (PCMs). This work is focused on solutions in this area and consists of two parts. First one is focused on different designs of thermal energy storage (TES) tanks based on the phase change materials. The second part is the analysis of tests results for TES tank containing shelf and tube heat exchanger and filled with phase change material. Thermal energy storage tank is analyzed in order to use it in domestic heating and hot utility water installations. The aim of this research was to check the applicability of phase change material for mentioned purpose. Results show that using phase change materials for thermal energy storage can increase amount of stored heat. The use of properly selected PCM and heat exchanger enables the process of thermal energy storing and releasing to become more efficient.

Selection of a Heat Exchanger for a Small-Scale Liquid Air Energy Storage System

2021 ◽  
Author(s):  
Alexander S. Fredrickson ◽  
Anthony G. Pollman ◽  
Anthony J. Gannon ◽  
Walter C. Smith
Keyword(s):  
Energy Storage ◽  
Heat Exchanger ◽  
Liquid Nitrogen ◽  
Material Selection ◽  
Storage System ◽  
Energy Storage System ◽  
Finned Tube ◽  
Small Scale ◽  
Tube Heat Exchanger ◽  
Finned Tube Heat Exchanger

Abstract This paper presents the results of a theoretical analysis of a heat exchanger design for the challenging application of a small-scale modified Linde-Hampson cycle liquid air energy storage system (LAESS). A systems engineering approach was taken to determine the best heat exchanger alternative for incorporation into an existing LAESS. Two primary heat exchanger designs were analyzed and compared: a finned tube heat exchanger (FTHE) design and a printed circuit heat exchanger (PCHE) design. These designs were chosen as alternatives due to the gas-to-gas cooling that occurs in the heat exchanger, and material selection was based on the requirement for the heat exchanger to withstand the cryogenic temperatures required for the system to produce liquid nitrogen. Thermodynamic analysis was conducted using the ε-NTU method and fin theory to determine the dimensional requirements for the finned tube heat exchanger and a trade-off study was conducted to compare the alternatives. Based on the results from the study, the PCHE was the preferred alternative due to an inherent small footprint, comparable cost to manufacture, simple integration into the LAESS and inherent safety features that are critical when working with high pressure systems. Future work will include subsystem and system integration and testing to obtain a consistently functional prototype that produces liquid nitrogen.

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