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CFD Simulation and Analysis of the Combined Evaporative Cooling and Radiant Ceiling Air-conditioning System

机译:蒸发冷却与辐射天花板组合空调系统的CFD仿真与分析

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摘要

Due to such disadvantages as large air duct and high energy consumption of the current all- outdoor air evaporative cooling systems used in the dry region of Northwest China, as well as the superiority of the ceiling cooling system in improving thermal comfort and saving energy, a combined system is presented in this paper. It combines an evaporative cooling system with ceiling cooling, in which the evaporative cooling system handles the entire latent load and one part of the sensible loads, and the ceiling cooling system deals with the other part of sensible loads in the air-conditioned zone, so that the condensation on radiant panels and the insufficiency of cooling capacity can be avoided. The cooling water at 18? used in the cooling coils of ceiling cooling system can be ground water, tap water or the cooled water from cooling towers in the summer.This new air-conditioning system and existing all- outdoor air evaporative cooling system are applied to a project in the city of Lanzhou. Energy consumption analysis of the building is carried out using the energy consumption code. Velocity and temperature distribution in the air-conditioned zone is computed using CFD. According to the results, the energy consumption and indoor human thermal comfort of both systems are then compared. It is concluded that the new system occupies less building space, reduces energy consumption, improves indoor human thermal comfort and saves initial investment.
机译:由于存在以下缺点,例如,中国西北干旱地区使用的当前全室外空气蒸发冷却系统的风管较大且能耗较高,以及天花板冷却系统在改善热舒适性和节能方面的优势,本文介绍了组合系统。它结合了蒸发冷却系统和天花板冷却系统,其中蒸发冷却系统处理整个潜在负载和一部分显着负载,而天花板冷却系统处理空调区域中的另一部分显着负载,因此这样可以避免辐射板上的凝结和冷却能力不足。 18的冷却水?天花板冷却系统的冷却盘管中使用的夏季可以是地下水,自来水或冷却塔的冷却水。这种新的空调系统和现有的全室外空气蒸发冷却系统已应用于城市的一个项目中兰州使用能耗代码对建筑物进行能耗分析。使用CFD计算空调区域的速度和温度分布。根据结果​​,比较两个系统的能耗和室内人体的热舒适度。结论是,新系统占用更少的建筑空间,减少了能源消耗,提高了室内人体的热舒适度并节省了初期投资。

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