Analysis of Dynamic Characteristics of Heat Pump with Thermal Accumulator

Abstract

For the purpose of reducing their production costs, most of domestic scale heat pumps are thermostatic controlled with fixed speed compressors. Often, different temperatures in different rooms of the same building are achieved by using thermostatic valves which, when opened and closed, change the thermal load of the heat pump. To prevent frequent switching On/Off of the pump, as this reduce energy efficiency and pump life cycle, heat accumulators are installed with the task of absorbing the excess heat delivered by the pump. The use of heat accumulators affects both the dynamics of the pump itself and the accuracy of the regulated temperature. The paper address dynamic characteristics of heat pump with accumulator using relay feedback technique.