风扇与辐射空调耦合系统的热舒适分析  

Thermal comfort analysis of coupled fan and radiant air conditioning system

作　　者：郭兴国[1] 万双双 陈文华[1] 喻彦喆 GUO Xingguo;WAN Shuangshuang;CHEN Wenhua;YU Yanzhe(School of Infrastructure Engineering,Nanchang University,Nanchang 330038,China)

机构地区：[1]南昌大学,南昌330038

出　　处：《流体机械》2024年第5期84-90,共7页Fluid Machinery

基　　金：国家自然科学基金项目(52268019)。

摘　　要：针对顶板辐射供冷系统存在的噪声问题,提出了一种采用辐射供冷与吸音板耦合系统,同时,通过在辐射顶板和吸音板之间增加风扇(向下吹),来抵消由于吸音板导致的辐射热交换的减少。重点研究了顶板辐射供冷与风扇耦合系统的室内气流分布、热舒适以及传热系数变化,其影响因素包括:吸音板覆盖率、风扇转速、房间高度。结果表明:风扇的加入增强了顶板的对流换热和总换热;随着风扇转速的增加和吸音板覆盖率的降低,室内空气温度降低;与无风扇的顶板辐射系统相比,风扇在高转速工况下的PMV值降低了0.37~0.40,总传热系数增长了28.4%~45.4%,在吸音板覆盖率为16%时,总传热系数的增长率达到峰值;可以通过增加风扇从而强化室内空气流动的方式来补偿较高室温带来的不适感。研究结果为顶板辐射系统的实施提供了有前景和实用的设计方案。A system that couples radioactive cooling and acoustical panels was proposed to solve the noise problem of the radiant ceiling cooling system,and a fan(blowing down)was added between the radiant ceiling and the acoustical panels to offset the decrease of radiant heat exchange due to the panels.The study was focused on the airflow distribution,thermal comfort and the change of heat transfer coefficient of the coupled system.The influencing factors include the coverage rate of the acoustical panels,fan speed and room height.The results show that the addition of fan enhances the convection and total heat transfer of the ceiling.With the increase of fan speed and the decrease of acoustical panels coverage,the indoor air temperature decreases.Compared with the radiant ceiling cooling system without fan,the PMV value is reduced by 0.37~0.40 at high speed of the fan.The total heat transfer coefficient is increased by 28.4%~45.4%.The growth rate of total heat transfer coefficient reaches the peak when the coverage rate of the acoustical panels is 16%.It suggests that the discomfort at higher room temperature can be compensated by increasing the indoor air flow.The research results provide a promising and practical design scheme for the implementation of radiant ceiling system.

关 键 词：辐射顶板 风扇 吸音板 CFD PMV 传热系数 

分 类 号：TH12[机械工程—机械设计及理论]