Study on the Performance of Fan-coil Unit in a Moderate Water Temperature Air Conditioning System

Bai Mengmeng; Wang Fenghao; Wang Zhihua; Ma Ruixue; Li Ke

doi:10.3969/j.issn.0253-4339.2019.03.052

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Study on the Performance of Fan-coil Unit in a Moderate Water Temperature Air Conditioning System

更新时间：2024-07-18

- Study on the Performance of Fan-coil Unit in a Moderate Water Temperature Air Conditioning System
- Journal of Refrigeration Vol. 40, Issue 3, (2019)
- 作者机构：
  
  西安交通大学建筑节能研究中心
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2019.03.052
  CLC：
- Published：2019
- 稿件说明：
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Bai Mengmeng, Wang Fenghao, Wang Zhihua, et al. Study on the Performance of Fan-coil Unit in a Moderate Water Temperature Air Conditioning System[J]. Journal of refrigeration, 2019, 40(3).
DOI：

Bai Mengmeng, Wang Fenghao, Wang Zhihua, et al. Study on the Performance of Fan-coil Unit in a Moderate Water Temperature Air Conditioning System[J]. Journal of refrigeration, 2019, 40(3). DOI： 10.3969/j.issn.0253-4339.2019.03.052.

摘要

本文结合中温水全回风空调系统与常规全回风空调系统的对比实验，分析了FP85系列风机盘管处理室内回风至平衡状态点时室内温湿度参数的变化规律，并通过盘管仿真的研究方法，模拟分析了冷冻水供水温度和管排数对盘管换热性能的影响规律。实验结果表明，当冷冻水供水温度从7 ℃增至9 ℃时，3排盘管FP85处理潜热的能力出现突降，且不能保证室内湿度舒适。当冷冻水供水温度每升高1 ℃时，室内平衡状态点的相对湿度增加11.03%~12.05%。对于6排盘管FP85，当冷冻水供水温度为9~12 ℃时，室内平衡状态点的温湿度参数均可满足舒适性空调的设计要求。仿真结果表明，当室内回风干、湿球温度分别为27.01 ℃和19.51 ℃，且4、5、6排风机盘管FP85均可保证室内温湿度舒适时，冷冻水供水温度每升高1 ℃，4排盘管的换热量降低6.13%，析湿系数降低0.045。相比于5、6排盘管，4排盘管的传热系数较大，除湿能力较优，故4排FP85盘管更适用于中温水空调系统。该研究表明中温水空调系统极具发展潜力并为其系统设计提供了理论依据。

Abstract

In this paper

the variation in the indoor temperature and humidity when FP85 series fan-coil units are used to treat indoor return air to its equilibrium point is analyzed based on the experimental comparison between an air conditioning system with a moderate water temperature and a conventional air conditioning system. Then

the influence of a chilled water supply temperature and tube numbers on the heat transfer performance of a fan-coil unit is simulated and analyzed by a coil simulation method. The experimental results show that when the temperature of the chilled water supply increased from 7 °C to 9 °C

the latent heat capacity of the 3-row FP85 fan-coil unit was reduced. As a result

the indoor humidity cannot be guaranteed in the comfortable range. As the chilled water supply was increased by 1 °C

the relative humidity of the indoor equilibrium point increased by 11.03%–12.05% accordingly. For the 6-row FP85 fan-coil unit

the temperature and humidity of the indoor equilibrium state can meet the design requirements of comfortable air conditioning

system with a chilled water supply temperature in the range of 9–12 ℃. Moreover

the simulation results state that the 4-row

5-row

and 6-row FP85 fan-coil units can ensure an equilibrium indoor temperature and humidity in the comfortable range for an indoor return air with dry bulb temperature 27.01 °C and wet bulb temperature 19.51 °C

respectively. The heat exchange and dehumidification coefficients of the 4-row fan-coil unit decreased by 6.13% and 0.045

respectively

when the supply chilled water temperature increased by 1 °C. The heat transfer coefficient and dehumidification ability of the 4-row fan-coil unit are superior to that of the 5-row and 6-row fan-coil units. Therefore

the 4-row FP85 fan-coil unit is more appropriate for an air conditioning system with moderate water temperature. This study indicates that the air conditioning system with moderate water temperature has great application potential

and provides a theoretical basis for the design of air conditioning system with moderate water temperature.

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