[en] The market share of heat pump systems has grown significantly in Europe in the past decades and, in residential applications, air-source heat pumps (ASHP) are usually considered due to their relatively low cost. In the literature, it has been widely demonstrated that injection cycle can improve the system performance and operating range. This paper presents an experimental study and a compressor model of such a system.
The first part of the paper focus on the experimental results collected from a vapor injection and variable speed scroll compressor air-to-water residential heat pump. The unit is a 10kW residential system working with R410a as working fluid and capable of providing floor heating and domestic hot water. It was tested in a controlled environment in order to achieve a wide range of outdoor and indoor conditions. The impact of the split lines and of the four-way valve on the superheat level is described. Finally, the impact on the system performance of the levels of superheat of both injection and suction ports is discussed.
The second part of this paper presents a model of the variable speed compressor. A thermodynamic model of the vapor injection scroll compressor is developed using empirical correlations for the volumetric efficiency, isentropic efficiency and the ratio between the injection and suction mass flow rates.
Finally, the comparison between the compressor model predictions and results from a steady-state experimental campaign is given.
Disciplines :
Mechanical engineering
Author, co-author :
Dechesne, Bertrand ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Lemort, Vincent ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Language :
English
Title :
MODELING AND EXPERIMENTAL RESULTS OF A RESIDENTIAL HEAT PUMP WITH VAPOR INJECTION AND VARIABLE SPEED SCROLL COMPRESSOR
Alternative titles :
[fr] Modélisation et résultats expérimentaux d'un pompe à chaleur résidentielle avec un compresseur spiro-orbital à vitesse variable et injection de vapeur
Publication date :
23 April 2018
Event name :
REHVA Annual Meeting Conference
Event organizer :
REHVA
Event place :
Brussels, Belgium
Event date :
23 avril 2018
Audience :
International
Main work title :
Proceedings of the REHVA Annual Meeting Conference
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