Economic analysis of air-cooled chiller with advanced heat rejection

被引：8
作者：
Yu, F. W. [1 ]
Ho, W. T. [1 ]
Chan, K. T. [2 ]
Sit, R. K. Y. [1 ]
Yang, J. [2 ]
机构：
[1] Hong Kong Polytech Univ, Hong Kong Community Coll, Hong Kong, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, Dept Bldg Serv Engn, Hong Kong, Hong Kong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION | 2017年 / 73卷
关键词：
Air-cooled chiller; Condenser fan; Mist precooling; Random forest; Variable speed control; ENERGY PERFORMANCE; TEMPERATURE; SIMULATION; BUILDINGS; SYSTEM;
D O I：
10.1016/j.ijrefrig.2016.09.016
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This study analyses economic benefits of an air-cooled chiller retrofitted with advanced heat rejection features. The rated capacity was 282 kW and operating variables were monitored comprehensively to develop random forest models. The top five variables to ensure model accuracy were identified. Electricity savings were predicted by the models with 3 advanced operating modes: variable speed control for condenser fans with an adjustable condensing temperature (the VSD mode), mist precooling of condenser air (the Mist mode), and their composites (the VSD + Mist mode). The integrated part load value (IPLV) was 2.90, 3.31, 2.93 and 3.34 for the normal mode, VSD mode, Mist mode, and the VSD + Mist mode, respectively. For a chiller system serving an office building, the VSD mode gave the highest economic benefit with a simple payback of 10.83 yrs and an internal rate of return of 4.38% over a 15-yr life cycle. (C) 2016 Elsevier Ltd and IIR. All rights reserved.
引用
收藏
页码：54 / 64
页数：11
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