Changing Trend of HVAC Outdoor Air Design Conditions over the Past Half Century in China
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Based on the meteorological data from 1952 to 2014, the changes of outdoor air design conditions in Beijing, Guangzhou, Haikou, Lhasa, and Shanghai were analyzed. The four parameters which are outdoor design temperature for heating, outdoor design temperature for ventilation in winter, outdoor design temperature for air conditioning in winter, and outdoor design average daily temperature for air conditioning in summer were calculated for each city with statistical 30 years and sliding one-year incremental method. Then, the trend of 60 years’ data of each city was analyzed respectively. The results show that over the past half century, the partial outdoor air design conditions for heating ventilation and air conditioning of civil buildings in China have been significantly increased, and the growth trend of conditions in each climate region has different characteristics.
KeywordsOutdoor air design conditions Trend analysis Climate change
This study was supported by the State Key Laboratory of Green Building in Western China (No. LSKF201914) and by “the 13th Five-Year” National Science and Technology Major Project of China (No. 2018YFC0704500).
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