夏热地区商场类建筑集中空调系统全新风运行性能分析

Performance in Full Fresh Air Mode of Centralised Air-conditioning System for Shopping Malls in China's Hot Summer Region

分析了中国夏热地区的室外气候条件,对于冬季,有近乎100%的时间可以采用全新风模式,而过渡季节会有一半左右的时间可以采用全新风模式,从而全年可以减少30%~60%的人工冷源运行时间。通过对焓值控制和温度控制2种调控模式的分析,研究了不同室内负荷强度、不同通风量和不同室内空气温湿度设定值条件下的调控方案。研究发现：室内负荷越大,采用全新风模式的节能效果越好;送风量宜设置为6~8 h-1;室内空气参数对节能效果影响很大,考虑到室内外温差对人体热舒适的影响,可以考虑不同季节不同的室内空气参数设置;对于调控模式,冬季和过渡季节可采用焓值控制模式;夏季宜采用温度控制模式。采用全新风模式,每年可以实现100~180kWh/m2的节能效果,从而产生30~50 kg/m2的碳减排量。

Based on the analysis of the outdoor weather condition in China＇s hot summer region,it is found that the full fresh air mode can work in the whole winter and half of the time in transition season.Thus,about 30%-60% runtime of the artificial cold source can be reduced.It studies the control strategies at different conditions of indoor load,ventilation and indoor air temperature and humidity by analyzing two control modes-enthalpy control and temperature control.It shows that the higher the indoor load is,the more efficient the full fresh air mode is.And the airflow is better to be set as 6~8 h-1.Since the indoor air parameter has great influence on energy saving,it is necessary to set different indoor air parameters in different seasons by taking the effect of temperature difference on human thermal comfort into consideration.It is also found that the enthalpy control mode can be used in winter and in transition season,while the temperature control mode can be applied in summer.If the full fresh air mode were adopted,it would cut down the energy consumption by 100~180 kWh/m2 and the carbon emission by 30~50 kg/m2 each year.