Experimental validation and numerical simulation of a direct-expansion solar-assisted heat pump for heating water
Palavras-chave:
Solar-assisted heat pump, Model uncertainty, Discharge temperature, COPResumo
In this work, a simulation model was developed to predict the thermal performance and discharge
temperature of a heat pump and compare with the experimental data. In this analysis a lumped model will be used
for each component of the system. The effect of various parameters, including collector area, storage volume,
solar radiation, windy speed, and atmospheric pressure was considered in the simulation. In this case will be
carried out considering the climatic conditions in the city of Belo Horizonte. This model was experimentally
validated using a direct expansion heat pump assisted by solar energy (DX-SAHP) equipped with a thermostatic
expansion valve. The performance of the heat pump simulation was compared with experimental results. The
mean absolute deviation mean deviation between the experimental COP and theoretical COP was 4.2±4.8% and
2.9±5.2%, respectively. The mean absolute deviation mean deviation between the experimental and theoretical
compressor outlet temperature was 3.3±2.0% and -2.0±2.0%, respectively.
