热风供暖送风方式对室外侵入冷风作用范围的影响
Influence of warm-air heating supply mode on outdoor cold air infiltration during heating season
摘要：
针对供暖房间有明显室外冷风侵入的情况，实测研究了碰撞射流通风和混合通风2种送风方式的供暖效果。结果表明，供暖房间近地面的温度均因为室外冷风侵入而明显下降，但碰撞射流通风热风供暖房间所受影响范围远小于混合通风房间。尽管提高送风速度可减小混合通风热风供暖房间的温度梯度，并缩小冷风对房间热环境的影响范围，但依然没有较低送风速度的碰撞射流通风热风供暖效果好。
Abstract：
In a heating room with significant outdoor cold air infiltration, studies the heating effects of impinging jet ventilation (IJV) and mixing ventilation (MV) by a series of experiments. The results indicate that the temperatures near the ground are obviously decreased both in the two air supply modes due to the intrusion of outdoor cold air, but the effect scope of cold air in the room with impinging jet ventilation is much smaller than that with mixing ventilation. Although increasing the supply air speed can decrease the temperature gradient of heating room with mixing ventilation and reduce the effect scope of cold air on indoor thermal environment, the heating effect of impinging jet ventilation with lower supply air speed is better.
Keywords:impingingjetventilation,mixingventilation,heating,coldairinfiltration,energyutilizationfactor,draughtsensation