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暖通空调>期刊目次>2021年>第10期

竖壁贴附通风与混合通风供热方式室内热环境及通风性能实测比较

Measurement and comparison of thermal environment and ventilation performance under different heating air supply modes of wall attached ventilation and mixed ventilation

韩 腾[1] 邓红娜[1] 李安桂[1] 刘 华[2] 杜 辉[2]
[1]西安建筑科技大学 [2]空调设备及系统运行节能国家重点实验室 [2]珠海格力电器股份有限公司

摘要:

在人工热舒适实验室内,对竖壁贴附通风与混合通风2种供热方式下室内热环境和通风性能进行了详细的对比实验研究。结果表明:采用竖壁贴附通风供热方式,室内竖向温度梯度造成的上热下冷现象得到改善,热量能有效送入工作区,有利于降低供热能耗;室内温度分布更均匀,人体头脚温差和温度不均匀系数更小,热浮升力对室内热舒适造成的不利影响得到有效克服;大风量、小温差送风可以缓解和优化冬季供热室内温度分布不均匀的问题,同时在满足送风可及性要求条件下,竖壁贴附通风室内温度分布对送风参数变化的敏感度较小,工程应用适应性强。

关键词:竖壁贴附通风,混合通风,供热,室内热环境,通风性能,热浮升力

Abstract:

Experimentally investigates and compares the thermal environment and ventilation performance in detail under different heating modes of wall attached ventilation and mixed ventilation in an artificial thermal comfort laboratory. The results show that the phenomenon of upper hot and lower cold caused by indoor vertical temperature gradient is improved with wall attached ventilation, and the supply energy can be sufficiently utilized by the occupants, which is beneficial to reduce the heating energy consumption. The problem of indoor thermal discomfort caused by thermal buoyancy is effectively improved, such as more uniform indoor temperature distribution, smaller temperature difference between head and foot of human body, and smaller temperature non-uniformity coefficient. In addition, the air supply with large air volume and small temperature difference can alleviate and optimize the problem of uneven temperature distribution in the heating room in winter. Because the temperature distribution in the wall attached ventilation room is less sensitive to the change of air supply parameters under the condition of meeting the requirements of air supply accessibility, the engineering application is more adaptable.

Keywords:wallattachedventilation,mixedventilation,heating,indoorthermalenvironment,ventilationperformance,thermalbuoyancy

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