Effective Heat Utilization of Range of Atmospheric Temperature and Solar Radiation : (Performance of System using Diurnal Range of Atmospheric Temperature)

Abstract

Behavior of space cooling system using the diurnal range of atmospheric temperature in the summer is characterized by numerical simulation. The system consists of radiators, a thermal energy storage tank, fan-coil coolers, and an electric cooler. Conditions for the calculation are assumed from the actual weather and characteristics of appliances. Total consumption of electric power is used for evaluating the system performance. The larger the volume of the storage tank becomes, the smaller the consumption becomes. The consumption is smaller in case the radiator is operated for a period of some limited hours than in case through the night. To decrease the consumption, there are also the most suitable values in the flow rate of the pumps and in the on off temperature of the fan-coil cooler. Stratified tanks could reduce the consumption by 3.3% compared with mixed ones. This system has a possibility to reduce demand for electricity or shift the demand to off-peak hours.