Thermal comfort findings: Scenario at Malaysian automotive industry

Thermal Science

关键词: thermal comfort;    WBGT;    PMV;    PPD;   

DOI  :  10.2298/TSCI111111015I

来源: DOAJ

【 摘 要 】

This paper discusses the findings of thermal comfort assessment at Malaysianautomotive industry. Nine critical workstations were chosen as subjects forthe study in order to determine the thermal comfort among workers atMalaysian automotive industry. The human subjects for the study comprises ofthe operators from tire receiving, dashboard assembly, drum tester, bodyassembly, seat assembly, door check assembly, stamping workstation, enginesub assembly and paint shop of the factory. The environmental factors such asWet Bulb Globe Temperature (WBGT), relative humidity, air velocity,illuminance were measured using BABUC A apparatus and Thermal ComfortMeasurement equipment. Through questionnaire survey, the demographic data ofsubjects and their perceptions on thermal comfort at each workstation wereassessed based on ISO Standard 7730 and thermal sensation scale usingPredicted Mean Vote (PMV). Then, Predicted Percentage of Dissatisfied (PPD)is used to estimate the thermal satisfaction of occupants. The resultsindicated that most of the workstations of the automotive industry areconsidered as uncomfortable. Tire receiving station is considered havingbetter working environment compared to other stations with lowest PMV indexof 1.09 to 1.41 and PPD of 46%. Meanwhile, the engine sub assembly stationand paint shop of assembly are considered the worst thermal environment withthe PMV index values ranging between 2.1 to 2.9 and PPD values of 81% to 99%.Therefore, these two workstations are considered not comfortable because thethermal sensation scale is warm and almost hot.

【 授权许可】

Unknown