Sistema de ar condicionado para ônibus urbano

Abstract

Absorption refrigeration systems are equipment that uses a thermal source to cold generation, with an exclusive source or from residual heat from another process. The buses engines produce large volume of gases at high temperature which is wasted to the environment, but could be used as a heat source to the absorption system. This work proposes the use of absorption equipment to the air conditioning of a bus with the characteristics of vehicles used on urban transport in Dourados, MS, with environmental conditions from this city. Is performed the calculation of the thermal load inside the bus, dimensioning of vapor compression and absorption refrigeration systems using different refrigerants, cycle energy balance and pipe dimensioning. There are two chapters that deal solely the diesel engine capacity to produce heat to the absorption system. It is concluded that the heat of the engine escape gases is sufficient to feed the cycle demand, providing the vehicle with lower fuel consumption, because it now have a cogeneration system, where the engine consumes the same energy and produces traction to the vehicle and thermal comfort to the passengers.