| Issue |
E3S Web Conf.
Volume 172, 2020
12th Nordic Symposium on Building Physics (NSB 2020)
|
|
|---|---|---|
| Article Number | 12006 | |
| Number of page(s) | 5 | |
| Section | Heating and DHW | |
| DOI | https://doi.org/10.1051/e3sconf/202017212006 | |
| Published online | 30 June 2020 | |
Design and simulation of a new PCM heat exchanger for domestic hot water and air temperature control
University of Applied Science of Western Switzerland, 1700 Fribourg, Switzerland
* Jacques Robadey, Simon Rime and Dominique Voide, Corresponding author: jacques.robadey@hefr.ch
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 three-dimensional 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.
© The Authors, published by EDP Sciences, 2020
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