KEYWORDS: Temperature metrology, Thermodynamics, Energy efficiency, Data modeling, Adaptive optics, Control systems, Systems modeling, Fluctuations and noise, Transmitters, Solar energy
This study applies the second law of thermodynamics to analyze the irreversibility of air source heat pump systems. By
using both T type thermocouple wires to measure the inlet and outlet temperatures of key components in the system and
using pressure transmitters to measure the high and low pressure of the experiment systems, we collect data and use two
control volume(CV) models to calculate the generative volume and irreversibility of entropy for each system
component. According to the experiment results for both CV models (the CV of the refrigerant section and the CV of
the whole control), the heat exchanger is found to have the largest irreversibility. The irreversibility error of the
condenser is 4.6% and the irreversibility error of the evaporator is up to 21%. By applying the results of this study it is
possible to improve the function of air source heat pump systems through improving the heat exchanger, achieving both
cost and energy savings.
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