Development of an optimal control method of chilled water temperature for constant-speed air-cooled water chiller air conditioning systems
Development of an optimal control method of chilled water temperature for constant-speed air-cooled water chiller air conditioning systems
复制标题
恒速风冷冷水机组空调系统冷冻水温度优化控制方法的开发
DOI：
10.1016/j.applthermaleng.2020.115802
复制
发表时间：
2020-11
影响因子：
6.4
通讯作者：
Deng Shiming
中科院分区：
文献类型：
--
作者：
Sun Yuying;Xue Huiyu;Wang Wei;Wu Shangjiang;Wu Yong;Hong Yang;Deng Shiming
恒速空冷机组通常是根据冷冻水返回温度（Twr）的固定设定点进行开关控制的，这严重限制了其在部分负荷工况下的效率。为了提高CAWC空调系统的性能，本文提出了一种实时复位CAWC的最优控制方法。首先，以北京某实际办公楼为例，以风机盘管（fcu）为终端设备，建立了CAWC空调系统仿真平台。其次，通过仿真计算得到不同零件载荷条件下twrat的最优值数据集；第三，为了使数据集能够实际使用，建立了通用回归神经网络（GRNN）模型，根据三个环境参数和一个操作参数预测最优twrvalue。最后，提出了一种基于GRNN的CAWC/FCU空调系统最优控制方法。数值计算结果表明，该方法能较好地控制室内热环境，使空调系统在制冷季节的能耗降低11.0%。该研究为干燥气候条件下CAWC/FCU空调系统提供了一种有前景的冷冻水温度控制方法。
Constant-speed air-cooled water chillers (CAWCs) are typically on–off controlled in accordance with a fixed set point of chilled water return temperature (Twr), which seriously restricts their efficiency during part load conditions. To improve the performance of CAWC air conditioning (A/C) systems, this paper developed an optimal control method to reset theTwrof CAWCs real time. Firstly, a simulation platform was established based on an actual office building with a CAWC A/C system using fan coil units (FCUs) as terminal devices in Beijing. Secondly, a dataset of optimal values ofTwrat different part load conditions was calculated by simulation. Thirdly, to enable the practical use of the dataset, a general regression neural network (GRNN) model was built to predict the optimalTwrvalue according to three ambient parameters and one operation parameter. Finally, a GRNN based optimal control method was developed for the CAWC/FCU A/C system. The numerical results demonstrated that the proposed method can achieve a good control over indoor thermal environment, and lead to a reduced energy use for the A/C system by 11.0% over the cooling season. This study provided a promising control method of chilled water temperature for CAWC/FCU A/C systems in dry climates.
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DOI：
10.1007/bfb0095332
发表时间：
1998-06
期刊：
--
影响因子：
--
作者：
P. Fritzson
通讯作者：
P. Fritzson
影响因子：
6.4
作者：
Xin-qiao Jin;Zhimin Du;Xiaokun Xiao
通讯作者：
Xin-qiao Jin;Zhimin Du;Xiaokun Xiao
影响因子：
6.4
作者：
K. F. Fong;V. Hanby;T. Chow
通讯作者：
K. F. Fong;V. Hanby;T. Chow
影响因子：
11.2
作者：
R. Murr;H. Thieriot;A. Zoughaib;D. Clodic
通讯作者：
R. Murr;H. Thieriot;A. Zoughaib;D. Clodic
DOI：
10.1088/1742-6596/501/1/012032
发表时间：
2014-04
期刊：
Journal of Physics: Conference Series
影响因子：
--
作者：
Luis S W Muhlen;Behzad Najafi;F. Rinaldi;R. Marchesi
通讯作者：
Luis S W Muhlen;Behzad Najafi;F. Rinaldi;R. Marchesi