Energy efficient operation of underground watersource & water loop heat pump air conditioning systems

Analyses more than two years fieldtest data of the underground watersource & water loop heat pump air conditioning system applied to an apartment in Beijing based on the computative method of calculating the electricity consumption of publicused air conditioning driven equipment and terminal heat pump units by the authors. The results show that the secondary circulating pump system of the original system consumes a lot of energy and its control performance is poor under partial load. Puts forward a scheme of energy efficiency innovation by adding a frequency converter to the original constant flow secondary circulating pump. The reformation effect is notable and the rate of power saving is over 35%.