Design and simulation of a new PCM heat exchanger for domestic hot water and air temperature control

Robadey, Jacques (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Rime, Simon (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Voide, Dominique (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland)

Based on previous experiences which have proven the efficiency of PCM heat exchangers for air temperature control, we designed and simulated new PCM heat exchanger structures made of multiple PCM layers sandwiched between loading and discharge layers. By circulating air or water in the discharge circuit, these heat exchangers can be used for heating air or water, respectively. For both use cases, a threedimensional analysis of the phase change and calculations of the charge/discharge powers were performed for the fusion and solidification processes. We obtained heating discharge powers ≥ 2.6 kW/m3 for 8 hours for air and ≥ 65 kW/m3 for 13 minutes for water with a respective total storage capacity of 28 kWh/m3 and 37 kWh/m3 . The heat extraction of air and water flows and their time dependence are discussed according to the percentage of liquid PCM and the temperature profile of the discharge flow inside the heat exchanger.


Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIA-FR
Institute:
Energy - Institut de recherche appliquée en systèmes énergétiques
Publisher:
Tallinn, Estonia, 6-9 September 2020
Date:
2020-09
Tallinn, Estonia
6-9 September 2020
Pagination:
5 p.
Published in:
Proceedings of the 12th Symposium on Building Physics, 6-9 September, Tallinn, Estonia
Appears in Collection:



 Record created 2020-06-02, last modified 2020-06-16

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