热风供暖房间室外冷风水平作用范围的实测研究
Horizontal influence range of outdoor infiltration cold air in warm-air heating rooms
摘要：
实测研究了室外冷风侵入对碰撞射流通风(IJV)和混合通风(MV)供暖房间近地面温度分布的影响。结果表明：IJV供暖时，送风热气流对近地面空气温度的控制能力强于MV供暖，并且前者近地面的空气温度远高于后者；IJV和MV供暖房间近地面的温度分布均不受冷风侵入频率的影响，前者受冷风的影响范围随冷风侵入量的减小而减小，而后者任意冷风侵入量下的冷风均覆盖于整个地面。通过设置适当的送风参数可使IJV供暖房间受室外冷风的影响程度和范围缩小，并存在基本消除室内热力分层的可能性，但MV供暖基本不可能实现这些目的。
Abstract：
Experimentally studies the effect of outdoor infiltration cold air on the air temperature distribution near the ground in the impinging jet ventilation (IJV) and mixing ventilation (MV) heating rooms, respectively. The measured results indicate that the control capability of the warm supply air for the floor temperature in IJV heating room is stronger than that in MV heating room, and the air temperature near the ground in the former is much higher than that in the latter. The temperatures near the ground in both IJV and MV heating rooms are not affected by the frequency of outdoor infiltration cold air, and the influence range of the infiltration cold air decreases with decreased amount of outdoor air in IJV heating room, while the infiltration cold air distributes along the whole ground for any amount of outdoor cold air in MV heating room. By setting the appropriate supply air parameters, the influence degree and range of the infiltration cold air can be decreased and the indoor thermal stratification may be eliminated for IJV, but for MV there is no possibility to achieve these purposes.
Keywords:coldairinfiltration,impingingjetventilation,mixingventilation,influencerange,thermalstratification,warm-airheating