Abstract: The study simulated heating and cooling energy consumption of typical office building during 1981 to 2010 in Tianjin based on a TRNSYS energy simulation software.Daily or hourly extreme energy consumption was determined by a percentile method and the response of extreme energy consumption to climate was analyzed in order to provide references for energy conservation of typical office building.The results show that the number of extreme heating energy consumption days is in a decreasing trend, while that of the cooling is in an increasing trend.Both are not significant at a confidence test.Also, the percentage of extreme energy consumption to the total does not change significantly.The extreme heating energy consumption is mainly influenced by temperature and wind, whereas the cooling is dominantly related to temperature, moisture and solar radiation.The dry bulb temperature, wet bulb temperature, wind speed and solar radiation influence the hourly extreme heating energy consumption.There is a delay of hourly extreme heating energy consumption on wind speed and solar radiation.On the other hand, wet bulb temperature and solar radiation influence the hourly extreme cooling energy consumption.No delay is found in the impacts of solar radiation on hourly extreme cooling energy consumption, while the response to wet bulb temperature delays 2-3 hours.Building energy conservation design and operation phases should therefore fully take into account of the different meteorological factors in winter and summer.

Key words: Extreme energy consumption, Climate response, Typical office building, Energy consumption simulation, Heating period, Cooling period