Numerical Simulation of Indoor Thermal Environment Effected by Air Supply Temperature and Grille Angle on Stratum Ventilation in a Typical Office

摘要

Based on for indoor thermal environment and human thermal comfort, the air distribution in a typical air-conditioned office in the mode of stratum ventilation was simulated with the Fluent Airpak simulation software in this paper. The variation regularity of indoor thermal environment effected on air supply temperature and grille angle was explored and human thermal comfort and energy efficiency was analyzed. The following conclusions could be obtained. Under this condition with air supply angle and other parameters unchanging, air conditioning room temperature appeared overall upward trend with the air temperature increased;; The average indoor wind speed appeared overall upward trend;; the average indoor predicted percentage of dissatisfaction PPD decreased firstly and then increased. When the air temperature was 20 "C, PPD achieved the minimum value. When the air supply temperature and other parameters were unchanging, the average value of PPD was increased firstly and then decreased with the air supply angle changing. When the air supply angle was 90 degrees, PPD achieved the maximum value.