在室外空气温度低的地方，由于热泵冬季供热量不足，需设辅助加热器。
At outdoor air temperatures and low places, because of lack of heat in winter for heat, the need for auxiliary heater.
在室外空气温度低的地方，由于热泵冬季供热量不足，需设辅助加热器。
Outdoor air temperature in the low places, due to lack of heat in winter for the heat required to set up auxiliary heater.
提出用灰色系统方法来分析建筑热过程的非确定性，给出太阳辐射照度和室外空气温度变化的灰色模型。
Presents gray system method to analyse building thermal process. Proposes gray models for solar radiation intensity and the change of outdoor air temperature.
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