Design and Modeling of Space Heating System Using Solar Energy for Weather Conditions of Pakistan /

Abstract

Due to increased energy demand, development of renewable energy sources is motivated because of shortage of fossil fuels and concerns over environmental impact. A room space heating can utilize solar energy to optimize the efficiency of heating system. Thus decreasing fossil fuel usage. A room space heating which is solar based system, is modeled and simulated in TRNSYS software which attain the load of standard room (8m x 5m x 3.12m). This whole system consists of solar collector, storage tank, auxiliary boiler and radiator. The heated water from the solar collector passes through the storage tank where heat is stored which is then used to heat water which gives heat to the room through radiator which is placed inside the room. Where auxiliary boiler is only used for heating purpose on cloudy days. Weather data file obtained from Meteonorm software for Islamabad (33.71oN, 73.06oE) is used in present work. Simulation is run for whole winter season in TRNSYS by using two different collectors, which are flat plate collector and photovoltaic thermal collector. By varying the collector area, collector slope and storage tank size, analysis are carried out to estimate the optimum system performance in terms of heat stored and compactness of system. Simulation results of whole system shows that proposed system gives significant primary energy savings with payback 7.6 years.