Abstract
Many system configurations of large-scale heat pumps (HP) are applicable to a district heating system, and choosing the right HP technology may be a challenge. In this study, thermodynamic models of eight different HP configurations are used to compare the Coefficient of Performance (COP) and Lorenz efficiency, for a range of sink and source outlet temperatures. Furthermore, for a specific case the total volume flow rate for each configuration was compared. The results revealed that a configuration with two two-stage cycles with low stage desuperheat heat exchangers in most operating conditions was superior in terms of COP. However, for all considered operating conditions at least three configurations obtained a COP which was less than 3 % lower than the best one. Comparing the volume flow rates among the configurations a combination of a one-stage cycle and a two-stage cycle with low stage desuperheat heat exchanger holds the lowest needed volume flow rate.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 25th IIR International Congress of Refrigeration |
| Number of pages | 8 |
| Publisher | International Institute of Refrigeration |
| Publication date | 2019 |
| Publication status | Published - 2019 |
| Event | 25th IIR International Congress of Refrigeration (ICR 2019) - Montréal , Canada Duration: 24 Aug 2019 → 30 Aug 2019 |
Conference
| Conference | 25th IIR International Congress of Refrigeration (ICR 2019) |
|---|---|
| Country/Territory | Canada |
| City | Montréal |
| Period | 24/08/2019 → 30/08/2019 |
Bibliographical note
Copyright © IIF/IIR.Published with the authorization of the International Institute of Refrigeration (IIR): www.iifiir.org
Keywords
- Large-scale heat pumps
- District heating
- Natural refrigerant
- COP
