大玻璃窗供暖房间温度特征的实验研究

Experimental Study on Law of Temperature in Heating Rooms with Large Windows

玻璃窗面积过大会造成空调房间空气局部负荷偏大,而空调系统设计中不会对此进行专门计算,对大玻璃窗影响的低估会导致人体热舒适不易保证。本文针对冬冷夏热地区某实际办公室,对玻璃窗面积较大的房间冬季供暖期的室内热环境进行了实测。结果表明:玻璃窗是保温薄弱环节,热桥效应会造成供暖房间温度水平分布不均匀,近窗处温度明显低于室内平均温度。对于已存在的空调系统,提高送风速度可减小温度分布的不均匀性。

Oversized glass windows can largen local load of air-conditioning rooms, which is not specially calculated in the design of air-conditioning systems. Underestimating the impact of glass windows results that human thermal comfort cannot easily met. The present paper tested the indoor thermal environment during heating period of an actual office with large windows, which was located in cold-winter and hot-summer zones. Results indicate that the window is the weakness of heat insulation and its thermal bridge effect can cause the horizontally inhomogeneous distribution of temperature and temperature near the window is obviously lower than the average temperature in a heating room. In existing air-conditioning systems, raising supply air velocity can reduce the inhomogeneity.