侧向局部送风的热舒适设计条件  

The Design Requirements of Thermal Comfort on Localized Lateral Air Supply

作　　者：辛军哲[1] 陈家明 郑才翥 Xin Junzhe;Chen Jiaming;Zheng Caizhu

机构地区：[1]广州大学,510000 [2]广东瑞泰通风降温设备有限公司

出　　处：《洁净与空调技术》2021年第2期67-72,共6页Contamination Control & Air-Conditioning Technology

摘　　要：对侧向局部送风所创造的气流环境的热舒适性进行了分析研究。按照人体占据空间整体达到二级热舒适度等级的要求,对局部送风在室外标准工况环境条件下所产生的射流流场进行了理论计算和分析,给出了不同送风口形式、不同制冷方式、不同送风温度下的设计基本要求。经对计算结果分析发现,蒸发冷却制冷技术相比于蒸汽压缩式制冷技术在局部送风的应用中具有明显的优势,进而对全国气候条件最为恶劣的几个城市及其他典型城市采用蒸发冷却的局部送风进行了计算。结果显示,在我国的大部分城市,只要控制好系统设计参数,蒸发冷却局部送风完全可以达到热舒适的要求。并对局部送风标准有效温度SET沿程变化规律及其影响因素进行了计算,对如何扩大射流作用距离,提出了具体的分析结果和建议,可供将局部送风用于改善人体局部部位热环境的相关研究和设计人员参考。In this paper,the thermal comfort of the air environment created by localized lateral air supply was analyzed and studied.For the purpose that a human body occupied zone achieves the second-level thermal comfort,the jet generated by the localized lateral air supply under outdoor standard working conditions was theoretically calculated and analyzed,and the main design requirements to any air supply outlet,any cooling principle and any air supply temperature are given.The calculation results showed that evaporative cooling technology compared with vapor compression refrigeration technology has obvious advantages in localized air supply.Calculations to the air supply located in the cities under the harshest climatic conditions and other typical cities of China were made using evaporative cooling technology,and it was concluded that the localized air supply with evaporative cooling can fully meet the requirements of thermal comfort in most of the cities of China if the system design parameters are controlled in good.Furthermore,the standard effective temperature(SET)variation and its factors along the flow of localized air supply were calculated.According to the calculation results,some suggestions on expanding the effective distance of the jet were put forward,which can be as a reference for relevant researchers and engineers to improve the thermal environment in part of human body by localized air supply.

关 键 词：局部送风 热舒适 蒸发冷却 标准有效温度 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]