Avaliação experimental do conforto térmico de uma cabine veicular

Abstract

With the increase in climatic temperatures, combined with the physical wear and tear of intense days, the need for vehicle thermal comfort has become essential, taking into account the demand for more efficient air conditioning systems, with less loss of performance. The objective of this work is to experimentally evaluate the thermal comfort of a Renault Duster vehicle cabin by measuring the dry and wet bulb temperatures and solar radiation with the refrigeration system in operation. The feeling of thermal comfort will be evaluated using the Predicted Average Vote (PMV) method. Type “K” extension cables were installed to obtain the air temperatures of the cabin, the external environment and the internal and external surfaces of the vehicle wrap, on 12/09/2022 in the afternoon. The MES 200 Solarimeter was used to measure solar radiation. The tests were carried out with the configuration of the air conditioner in closed and open recirculation at maximum power, using the TAVR-650 Anemometer equipment to measure the air flow from the air diffusers open. The vehicle was parked exposed to the sun, and with an occupant in the front passenger position. The analysis of the results obtained with the use of the PMV method in transient regime, with the open recirculation configuration reached the value of the interval 2.85 - 2.88, and the closed recirculation reached the value of the interval of 3.28 - 3,03, demonstrating that the vehicle is in the “very hot” condition according to the thermal comfort scale provided by ASHRAE. Keywords: Vehicle Thermal Load, Thermal Comfort, PMV.