變頻離心式冰水主機之節能分析

Economic Analysis of VFD Centrifugal Chiller

劉青龍(Liu-Ching Lung)

指導教授 ： 張永宗

國立臺北科技大學/機電學院/冷凍空調工程系所/碩士(2005年)

https://doi.org/10.6841/NTUT.2005.00089

摘要

建築物裡冰水主機、冷卻水塔、水泵與空調箱的馬達佔去中央空調系統的絕大部分耗電量，近年來最佳的策略即是加裝變頻器去改變電源的頻率以變化馬達的轉速來應付建築物之負荷變動，以節省能源。雖然冰水主機是多數商業建築物中的單一最大的用電負載，但是離心式冰水主機與變頻器之合作關係，從來只是存在於空調節能技術文章之中，由於最近兩年內由於大馬力(200~1200HP)的變頻器其技術得到改良與價格大幅下降，使得離心式冰水主機附加變頻器已經逐漸普及，本文將以電腦軟體配合台灣本地全年氣候來模擬主機設計與能源消耗功率比較。接著設定四種最常見的主機噸位搭配方式，以定速離心式冰水主機為對照組，找到此購物中心最具經濟性的變頻離心式冰水主機搭配組合，並將運轉費用加入初置成本以算出每一組合的空調電費預估及回收年限，希望以此方式建立一個變頻離心式冰水主機經濟行評估模型，幫助國內的空調設計與廠務工程師脫離單純以冰水主機全載效率來評估整棟建築物冰水系統耗電量的窘境。

關鍵字

變頻器 ； 離心式冰水主機 ； 變頻離心式冰水主機 ； 冰水主機之節能分析

並列摘要

Motors of chiller、cooling tower、pump and air handing units are the major part of electric power consumptions for HVAC system in normal building. When the building cooling load changed, Change the motor speed by variable frequency drive (VFD) is a good energy saving strange in recently years. Although commercial building largest single electric consumption is chiller. The relationship between variable frequency drive (VFD) and centrifugal chiller only can be seen in the paper study before. The large VFD (200~1200 HP) becomes more popular because cost down and performance improved. The technology of VFD centrifugal chiller becomes possible. This paper will use computer software to calculate chiller system design and energy consumption in Taiwan climate. Study the energy differences between the fix speed and variable speed centrifugal chiller in 4 seasons of a standard year. In order to set up a chillers economic analysis model for HVAC system. Design 4 different chiller tonnage combinations for a shopping center. Finding the best energy saving chiller’s design for this building. This chillers economic analysis model can help HVAC consultant and owner to find a good way know VFD centrifugal chiller saving energy for their building.

並列關鍵字

VFD centrifugal Chiller ； VFD ； Centrifugal chiller

參考文獻

[2]Frank J. Lenarduzzi, P.Eng, P.E. Steven S. Yap, P.Eng , Measuring the Performance of a Variable-Speed Drive Retrofit on a Fixed-Speed Centrifugal Chiller, ASHRAE TO-98-6-3, ATLANTA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1998, pp.2-3.

[9]ASHRAE,” Compressor,” HVAC system and equipment, CH 34, ATLANTA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 2000, pp.27-32.

[10]ASHRAE, “nonresidential cooling and heating load calculation procedures,” HVAC Fundamentals Handbooks, CH. 29, ATLANTA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.,2001, pp.2-3.

[15]ASHRAE, ”Supervisory control strategies and optimization,” Applications Handbook CH 40, ATLANTA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1999, pp.9-12.

[17]Jan F. Kreider, Peter S. Curtiss, Ari Rabl., Heating and cooling of buildings, design for efficiency , New York: McGraw-Hill, 2002, second edition. pp. 839-848.