Performance analysis of wind catcher integrated with shower cooling system to meet thermal comfort conditions in buildings
Performance analysis of wind catcher integrated with shower cooling system to meet thermal comfort conditions in buildings
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DOI：
10.1016/j.jclepro.2017.01.160
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发表时间：
2017-04
影响因子：
11.1
通讯作者：
A. Poshtiri;Seyedeh Mahbubeh Mohabbati
中科院分区：
文献类型：
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作者：
A. Poshtiri;Seyedeh Mahbubeh Mohabbati
本文研究了一栋两层建筑的自然通风和降温问题，该建筑采用了淋浴降温系统来降低环境空气温度。根据自适应热舒适性和ISO/EN 7730标准，在不同的运行条件下对系统满足热舒适条件的能力进行了评估。为了估算每小时的换气量和模拟测试建筑周围和内部的空气流动，利用有限元分析软件Ansys Fluent 6.3，利用热力学模型计算了淋浴冷却系统出口的空气温度。结果表明，在风速大于0.4m/S的情况下，可通过调节窗户的开度，将房间的ACH值设定在3~20h−1的范围内。在此条件下，进入建筑物内的气流温度和相对湿度不随风速变化。此外，还发现当三栋建筑位于一个方向时，中间建筑的ACH值比其他建筑小。随着ACH值的增加，所需冷却需求的较大值将满足热舒适性条件。虽然拟议系统的电能消耗已经低于蒸发式空气冷却器，但它无法与环境空气相对湿度较高的分离式逆变式空调竞争。
In this study, natural ventilation and cooling of a two-floor building connected to a wind catcher were studied in which a shower cooling system has been used to reduce ambient air temperature. The capability of the system to meet thermal comfort conditions based on adaptive thermal comfort and ISO/EN 7730 standards was evaluated under different operating conditions. In order to estimate the air change per hour and air flow simulation around and inside the test building, ANSYS FLUENT 6.3 software was utilized and the air temperature at the outlet of the shower cooling system was computed using a thermodynamic model. The results showed that for the wind velocity beyond 0.4 m/s, the ACH value for the rooms could be set in the range of 3–20 h−1with the regulation of window's aperture. Under this condition, the temperature and relative humidity of air stream into the building did not change with the wind velocity. Also, it was found that when three buildings are situated in one direction, ACH value for the middle building is less than others. As the ACH value increases, thermal comfort conditions are met for larger values of required cooling demands. Although electrical energy consumption of the proposed system is already lower than evaporative air coolers, it cannot compete with split inverter air conditioners where the relative humidity of ambient air is high.