Sustainable Ventilation Solution for Thermal Comfort Using Bubble Sheet as A False Ceiling

Abstract - Ventilation with human comfort is gaining prominence in the HVAC sector. Although renewable energy sources are in the limelight, there is still a lot to be discovered in this field. Ventilation with a sufficient air change rate (ACR) is necessary for healthy indoor air quality, particularly in buildings with poor ventilation. Conventional electromechanical systems work well but tend to be costly and energy-hungry. This phenomenon is more for sheet metal-roofed buildings, where the heat gain is much greater than in concrete slabs. The transfer of heat by conduction, convection, and radiation causes discomfort for people. A bubble sheet fixed as a false ceiling at a certain distance can function as a radiation barrier. The bubble sheet returns radiated heat to the roof, and a solar chimney or turbo ventilator removes the hot air between the sheet and roof. Adjustable ceiling openings permit controlled air change. In heavily populated areas, an ACR of up to 10 should be used. A green ventilating system with such attributes has been put in place in room B-341 of S.S.V.P.'s B.S. Deore College of Engineering, Dhule, Maharashtra. Sensors were installed to check efficacy. Findings indicate a temperature drop of 6–7°C without power, which is an important step in the direction of green energy solutions. Keywords: ACR (Air Change Rate), HVAC (Heating, Ventilation, and Air Conditioning).