Theoretical Investigation on Transient Heat Transfer through Building for PV-powered Solar Summer Air Conditioning

Abstract

The present work determines the transient heat transfer through wall for solar air conditioning study in summer. Suitable recirculation, indoor dry-bulb temperature, wet-bulb temperature, outdoor dry-bulb temperature and relative humidity are chosen. Considering the plaster on inside-wall and outside-wall construction, roof construction, floor construction, door size and thermal conductivities of glass, concrete, bricks, plaster, and the latent heat and sensible heat from the room are determined. Direct and diffuse radiation is obtained for the month of March, April and May. The sol-air temperature is estimated by considering these radiations, outdoor temperature and outside heat transfer coefficient. From the sol-air temperature, time lag of temperature difference between indoor and outdoor is calculated. Equivalent temperature difference method is also used to determine the temperature difference between these indoor and outdoor. The transient heat transfer coefficient is calculated by the values of temperature differences. Power required to run the solar panel is calculated from the determined values of heat transfer coefficient.