18 May 2017

O.1.8.5 Experimental and Numerical Study of the Dynamic Behavior of an Air to Water Heat Pump

This work is focused on studying the dynamic behavior of an air to water heat pump both experimentally and
numerically. The system consists of a conventional heat pump cycle (compressor, condenser, capillary tube and
evaporator) which transfers heat from the surrounding air into a storage tank with water. The transient heating
process of the water has been analyzed under different external conditions (ambient temperature), operational
settings (refrigerant mass charge) and geometric characteristics (capillary tube length). A numerical model has
been used to predict the system response under all the aforementioned conditions using a pseudo-transient
approach. The model has been validated with measurements obtained from a fully instrumented experimental
facility. The results show relatively good agreement against measurements.