OPERATION CONTROL OF HYBRID SOLAR HEAT PUMP SYSTEM VIA ENERGY BALANCE LOGIC PROGRAM

Abstract

We are developing solar and ground assisted hybrid solar heat pump (HP) systems for DHW supply. There are various operating modes in the system and for better overall system efficiency, timing of switching between modes is necessary. In this paper, a detailed control strategy in which starting condition of HP, heat source selection of HP and maintenance of constant hot water supply during an operational day to a general house in Japan has been discussed. For improving efficiency of HP, we are controlling hot water flow rate also. The system is controlled via logical programming. And one-day experiment has been discussed.