Studies on Improvement of Thermal Comfort in Cab (Part 2)

Analysis of Thermal Environment in Cab set up in an Environmental Chamber

Abstract

In this report, a cab of the construction machinery was set up in the environmental chamber where an air temperature and a wind velocity outside the cab in addition to an artificial sunlight were able to be controlled, and the thermal environment in the cab under the various surroundings was analyzed, and the skin surface temperature and humidity of an operator's body were measured under the cooling conditions. As the result, it was found that the wall temperature inside the cab and the skin surface temperature of the operator were non-uniformly increased, and that the cause is mainly due to much solar energy of incident sunlight. Then, it was made clear that the reduction of the incident sunlight by putting a shading film on the glasses, an efficient layout of the louvers, and the adoption of the seat with an air-blow were very effective to improve the thermal comfort of the operator in the cab.