Performance evaluation of a radiant floor cooling system integrated with dehumidified ventilation
Performance evaluation of a radiant floor cooling system integrated with dehumidified ventilation
复制标题
DOI：
10.1016/j.applthermaleng.2007.10.020
复制
发表时间：
2008-08
影响因子：
6.4
通讯作者：
D. Song;Taeyeon Kim;Suwon Song;Suckho Hwang;S. Leigh
中科院分区：
文献类型：
--
作者：
D. Song;Taeyeon Kim;Suwon Song;Suckho Hwang;S. Leigh
地板辐射供冷系统可以作为全空气供冷系统的替代方案，利用韩国现有的Ondol系统（地板辐射供暖系统）来节省能源并保持室内热舒适性。不幸的是，地板辐射冷却系统在冷却季节期间在炎热和潮湿的条件下可能导致地板表面上的冷凝。此外，由于通常存在于地板辐射冷却系统中的混凝土块的热存储效应，地板辐射系统不能快速响应内部负载变化。本研究提出一种结合除湿通风的地板辐射供冷系统，其通过降低露点温度来防止地板表面结露，从而对通过通风机中的冷却盘管进入的室外空气进行冷却和除湿。此外，室外复位控制用于调节提供给辐射地板的冷冻水的温度，室内温度反馈控制用于响应内部负载的变化。为了评估地板辐射供冷系统与除湿通风相结合的性能，在实验室环境中进行了物理实验，并对韩国的一套公寓进行了TRNSTIM模拟。结果表明，该系统不仅能有效地解决地板表面结露问题，而且能将室内热环境控制在可接受的舒适范围内。此外，该系统还提高了对内部负载变化的响应能力。
The radiant floor cooling system can be used as an alternative to all-air cooling systems, using the existing Ondol system (a radiant floor heating system) in Korea to save energy and maintain indoor thermal comfort. Unfortunately, a radiant floor cooling system may cause condensation on the floor surface under hot and humid conditions during the cooling season. In addition, the radiant floor system does not respond quickly to internal load changes due to the thermal storage effect of the concrete mass, which is usually present in radiant floor cooling systems. This study proposes a radiant floor cooling system integrated with dehumidified ventilation, which cools and dehumidifies the outdoor air entering through the cooling coil in the ventilator by lowering the dew-point temperature to prevent condensation on the floor surface. Furthermore, outdoor reset control was used to modulate the temperature of chilled water supplied to the radiant floor, and indoor temperature feedback control was then used to respond to the internal load changes. To evaluate the performance of the radiant floor cooling system integrated with dehumidified ventilation, both a physical experiment in a laboratory setting and TRNSYS simulation for an apartment in Korea have been conducted. As a result, it was found that the proposed system was not only able to solve the problem of condensation on a floor surface but also to control the indoor thermal environment within the acceptable range of comfort. Furthermore, the proposed system improved the responsiveness to internal load changes.