毛细管顶板辐射空调系统数值模拟与性能研究

Numerical Simulation and Performance Study of Capillary Ceiling Radiant Air Conditioning System

毛细管辐射吊顶板是一种新型辐射空调末端设备。为探究其夏季供冷性能,着眼于辐射空调房间整体热环境,利用有限元法建立辐射顶板热传递模型,结合热平衡原理,建立了房间整体传热模型。利用该模型研究辐射板供水参数、顶板材料、室外气候条件因素对顶板供冷量及室内热环境的影响,得到结论:辐射板供水流速过小或过大都不利于系统运行,综合考虑后宜将流速设置在0.05~0.1m/s范围内;辐射顶板的供冷能力受顶板材料的导热性能及其发射率共同影响,在选择顶板材料时应综合考虑这两个因素;辐射板供冷量随室外气候条件的变化幅度较新风供冷量大,具有更好的自调节能力。

Capillary tube radiant ceiling panel is a new style of the terminal equipment of the radiation air conditioning system.This article focuses on the whole thermal environment of the room using radiation air conditioning system.In order to investigate the cooling performance of the capillary tube radiant ceiling panel,the radiant ceiling thermal transfer model established by the finite element method and the room heat balance model are taken to model the whole room heat transfer.After studying supply water of the radiation panel,ceiling material and outdoor climate factors’influence on the ceiling cooling capacity and the indoor thermal environment by using the model,it can be concluded that the feasible speed of the supply water should stay within0.05to0.1meters per second.Both the thermal conductivity and emissivity of the roof material have influence on the radiation ceiling panel’s cooling capacity.The radiation ceiling panel is of better self-regulation than fresh air system when the outdoor climate changes.