Simulation of intermittent transient cooling load characteristic in an academic building with centralized HVAC system
作者单位：Mechanical Engineering Department University Teknologi PETRONAS Bandar Seri Iskandar Malaysia
会议名称：《International Conference on Environment Science and Engineering（ICESE 2011）》
会议日期：2011年
学科分类：080705[工学-制冷及低温工程] 08[工学] 0807[工学-动力工程及工程热物理]
关 键 词：Building simulation intermittent transient cooling load characteristic centralized HVAC system academic glazed building
摘 要：This paper aims to estimate intermittent transient cooling load characteristics in an academic building with large glazing area using TRNSYS. Simulation and experimental studies have been done in the past to estimate cooling load characteristic and to find strategies to reduce the energy used by the centralized HVAC system in various ways. However, these studies were mostly conducted for a building with simultaneous occupancy pattern. Since occupancy pattern in a university is intermittent, the cooling load characteristic would be different with that with simultaneous occupancy pattern. The building thermal and simulation model was first built and validated by comparing the results with experimental results. The validated model was then used to estimate the cooling load characteristic on a year basis. In addition, the effect of the occupancy pattern were also analyzed and discussed. The results showed that the ratio of cooling loads at minimum and maximum were 0.52, 0.54, and 0.68 for the workshop, classroom and office due to the occupancy pattern. The results also implied that the HVAC system should be equipped with additional equipment to track the occupancy and make it work based on the occupancy pattern. This would reduce the energy wasted during unoccupied period.