摘要
采用数值方法,分析研究集雨水再利用对工业厂房屋面进行喷淋降温的可行性。运用COMSOL Multiphysics软件对屋面喷淋雨水与不喷淋雨水进行蒸发冷却模拟和共轭传热模拟,对比研究两工况下屋面温度、厂房内人员活动区(高度2.5 m以下)温度以及水流带走屋面热量的差异。在蒸发冷却模拟中,喷淋雨水对屋面温度的上升起到了减缓作用,人员活动区温度比不喷淋雨水时低0.1~2.9℃;16:00后屋面温度逐渐下降,不再需要喷淋降温,以节约水电资源。在共轭传热模拟中,喷淋雨水工况下的屋面平均温度为37℃,出口水温大约升高3.17℃;不喷淋雨水工况下的屋面平均温度为41℃,出口水温大约升高4.16℃。喷淋雨水通过减缓屋面温度上升速度有效地降低了人员活动区温度,且不同屋面温度水流带走的热量值差异较大,降温效果明显。喷淋降温符合绿色建筑理念,并可提供较为舒适的工作环境。
Numerical method is used to analyze the feasibility of reusing the water collected during rainy seasons to cool the roof of an industrial factory in summer. COMSOL Multiphysics software is used to perform evaporative cooling simulation and conjugate heat transfer simulation when the roof is sprayed and non-sprayed, respectively, to make a comparison between the contrasts of roof temperature, the temperature of the personnel＇s active area（below the height of 2.5 m） in the factory, and the heat taken away from the roof by the water flow. In the evaporative cooling simulation, the sprayed water has a slowing effect on the increase of the roof temperature, and the temperature in the personnel activity area is0.1~2.9℃ lower than the condition without spraying. As the roof temperature drops gradually after 16：00,it is no longer necessary to carry out spray cooling to save water and electricity resources. In the conjugate heat transfer simulation, the average roof temperature under the spraying condition is 37℃, and the outlet water temperature rises by approximately 3.17℃; the average roof temperature under the condition without spraying is 41℃, and the outlet water temperature rises by approximately 4.16℃. The sprayed water slows down the temperature increase on the roof surface, which effectively reduces the temperature of the personnel＇s active area. The heat taken away from the two roof temperatures is different, indicating that the cooling effect is obvious. Spray cooling is in line with the green building concept and can provide the personnel with a more comfortable working environment.
作者
朱常琳
邓信青
张荣国
卢金锁
孟庆军
李胜涛
江荷
ZHU Chang-lin;DENG Xin-qing;ZHANG Rong-guo;LU Jin-suo;MENG Qing-jun;LI Sheng-tao;JIANG He(School of Environment ＆ Municipal Engineering, Xi ＇an University of Architecture and Technology, Xi ＇an 710055, China;Nanning Rail Transit Co., Ltd., Nanning 530000, China)
出处
《工业技术创新》
2018年第3期83-88,共6页
Industrial Technology Innovation
基金
南轨科[2016]04号:南宁轨道交通"海绵车辆段"研究
关键词
集雨水再利用
工业厂房
屋面
喷淋降温
数值分析
Reuse of Collected Water
Industrial Factory
Roof Surface
Spray Cooling
Numerical Analysis
