Thermal Analysis of V-Corrugated Double-Glazed Dual Purpose Solar Water-Air Heater

Abstract

In the current work, the authors designed and developed a V-Corrugated Double-Glazed Dual-purpose Air-Water Heater (V-DAWH). This device can provide hot air as well as hot water simultaneously. An experimentally verified mathematical model of the suggested design has been created for the weather of Raipur, CG, India (21.2513° N, 81.6295° E). The V-Corrugated Single Glazed Air-Water Heater (V-SAWH) and the Flat Plate Air Water Heater (F-AWH) have been used to compare the performance of the suggested heater (V-DAWH). For a typical winter day, the maximum and minimum air and water temperatures for V-SAWH and F-AWH are 33.2°C and 55.5°C, respectively, at a mass stream rate of 0.01 kg/s. For V-DAWH, air and water are heated to 30.1°C and 51.4 °C, subsequently. The highest air and water temperatures for V-SAWH are 67.2°C and 70.4°C, subsequently. Consequently, as the airflow rate in the upper compartment increases, the degree of heating decreases but the daily efficiency of the heater increases.For V-DAWH With increase in air flow rate from 0.01kg/s to 0.030 kg/s the drop in water temperature and exit air temperature is about 5.4% and 12.3%, respectively. Whereas the efficiency increases by about 3.1%. The maximum daily efficiency for F-AWH and V-SWAH for a day in winter in Raipur, CG, is approximately 83.9% and 66.4%, respectively. V-DWAH operates at a daily efficiency of roughly 64.1%.