[en] Zeotropic mixtures of refrigerants can improve the performance of heat pumps in applications with high temperature
differences. However, more experimental campaigns are needed to improve confidence in the approach to customize
refrigerant mixtures, especially with hydrocarbons. This study investigates the influence of adjusting the composition
of a mixture with Isopentane and Propane on a high temperature heat pump at operating conditions with 30 K
temperature difference in the source and sink, at a source inlet temperature of 70 °C and a sink outlet temperature
120 °C. The results show that the COP increased by 13.3 % and the heating capacity by 60 % for the most efficient
composition. Differences between the charged composition and the calculated circulating composition were observed,
but the reason is unclear.
Disciplines :
Energy
Author, co-author :
Lemke, Paul ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Lemort, Vincent ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Thermodynamique appliquée
Bertsch, Stefan S.; Institute for Energy Systems > Eastern Switzerland University of Applied Sciences
Brendel, Leon P.M.; Institute for Energy Systems > Eastern Switzerland University of Applied Sciences
Language :
English
Title :
Experimental Investigation on Optimal Composition of Propane/Isopentane – Mixture in a High Temperature Heat Pump
Publication date :
13 July 2026
Event name :
Herrick Conferences 2026
Event organizer :
Herrick Laboratories - Purdue University
Event place :
West Lafayette, United States
Event date :
13th - 16th of July 2026
Audience :
International
Development Goals :
7. Affordable and clean energy
Name of the research project :
BRIDGE Discovery: flexible refrigerant mixtures make heat pumps more efficient
