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Evaluating the low exergy of chilled water in a radiant cooling system

flywoud 添加于 2009-12-4 20:23 | 1855 次阅读 | 0 个评论

作者
WANG S, MORIMOTO M, SOEDA H, YAMASHITA T
摘要
In this paper, in order to make guidelines for designing a low-energy radiant cooling system with an air-handling unit (AHU) for dehumidification, we investigated the impact of various air-conditioning parameters on the exergies of chilled water supplied to radiant panels and a cooling coil. The cooling load, thermal comfort index PMV, relative humidity, area of radiant panels, sensible heat factor (SHF), temperature and air-flow rate of supply air of the AHU, and presence/absence of total heat exchanger were considered. We used computational fluid dynamics (CFD) code in order to analyze the indoor air-flow and thermal environments, and added models for the calculation of thermal transfer to radiant panels and a cooling coil. Furthermore, a feedback control algorithm was introduced to calculate the surface radiant panel temperature, targeting the average PMV of the task area in an office room. As a result, the impact of various air-conditioning parameters on the exergies of chilled water were demonstrated quantitatively. As an example, by reducing the cooling load rate from 100% to 57% and 27%, the exergy of chilled water decreased by 47% and 67%, respectively.
详细资料
- 文献种类: Journal Article
- 期刊名称: Energy and Buildings
- 期刊缩写: Energy and Buildings
- 期卷页: 2008年第40卷第10期 1856-1865页
- ISBN: 0378-7788
学科领域工程技术 » 材料科学
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exergy
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low exergy