Research on indoor thermal comfort of expressway service building based on SPMV

According to the characteristics of “temporary stay” and “streamlined” passenger flow in expressway service buildings, this article uses the “streamlined thermal comfort” index to characterize the indoor thermal comfort condition of the buildings,to create an overall comfortable space based on the “streamline trajectory”.The article proposes to divide comprehensive thermal comfort into “regional static thermal comfort” and “inter-zone dynamic thermal comfort”, revise the existing PMV(Predicted Mean Vote) index, and integrate the characteristics of the two types of indicators to form a comprehensive thermal comfort evaluation index based on “passenger trajectory”. The main work of this article includes: Firstly, using the temperature frequency method, a regression curve fitting between actual thermal sensation and indoor operative temperature is conducted to obtain the acceptable thresholds of MTS(Median Thermal Sensation), PMV neutral temperature, and actual temperature, forming a streamlined static thermal comfort index. The metabolic rate M value is segmented according to a 6-minute stabilization time to form a streamlined dynamic thermal comfort index; Introduce the factor of regional residence time τ to form a comprehensive thermal comfort index for streamlining. Secondly, an empirical analysis was conducted on the revised indicators, and the measured TSV(Thermal Sensation Vote) = -1, 0, 1 curves under different operating conditions in summer and winter were fitted with the SPMV(Streamline-Predicted Mean Vote) curve, revealing that the error in each functional area was within 10 %. The analysis results show that the modified index SPMV has greatly improved its consistency with the measured thermal sensation TSV, and can be used to evaluate the indoor thermal comfort of expressway service buildings in cold regions.The research results have high practical value for creating comfortable indoor environments in different indoor spaces of transportation commercial complexes, and have universal significance for creating streamlined indoor dynamic comfortable environments in urban commercial complexes.