Abstract
A large amount of operational and economic constraints limit the applicability of heat pumps operated with natural working fluids. The limitations are highly dependent on the integration of heat source and sink streams. An evaluation of feasible operating conditions is carried out considering the constraints of available refrigeration equipment and a requirement of a positive Net Present Value of the investment. The considered sink outlet temperature range is from 40 °C to 140 °C, but for the heat pumps considered in this paper, the upper limit is 100 °C. Five heat pumps are studied. For each set of heat sink and source temperatures the optimal solution is determined. At low sink temperature glide R717 heat pumps show best performance, while at higher sink glide transcritical R744 may become important. In a second paper, the results of the VCHP are compared to a similar study considering the ammonia-water absorption-compression heat pump.
| Original language | English |
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| Title of host publication | Proceedings of 11th IIR Gustav Lorentzen Conference on Natural Refrigerants |
| Number of pages | 8 |
| Publisher | Chinese Association of Refrigeration |
| Publication date | 2014 |
| Publication status | Published - 2014 |
| Event | 11th IIR Gustav Lorentzen Conference on Natural Refrigerants - Hangzhou, China Duration: 31 Aug 2014 → 2 Sept 2014 Conference number: 11 http://www.gl2014.org/en/index.asp |
Conference
| Conference | 11th IIR Gustav Lorentzen Conference on Natural Refrigerants |
|---|---|
| Number | 11 |
| Country/Territory | China |
| City | Hangzhou |
| Period | 31/08/2014 → 02/09/2014 |
| Internet address |