R-22螺旋壓縮式蓄熱儲冰系統之效益分析

Beneficial Analysis for Duo-thermal Storage System Using R-22 Screw Compressor

方智勇(Chih-Yeong Fang)

指導教授 ： 柯明村

國立臺北科技大學/機電學院/機電整合研究所/碩士(2006年)

摘要

螺旋式壓縮機目前大多使用於冰水主機，但可依不同之使用目的設計不同的冷媒系統，以提高能源多樣化應用的效果，並提升電力能源使用率，進而降低化石能源的消耗、減少系統運轉費用與抑制二氧化碳排放量。
本研究以蒸氣壓縮式冷凍循環為基礎，搭配離峰用電時間同時蓄熱儲冰的構想，就雙儲能系統（DTSS；Duo-thermal Storage System）與一般傳統設計系統（冰水主機與鍋爐）比較二個系統的年度運轉費用與二氧化碳排放量。蓄熱儲冰系統主要利用離峰用電時間於高溫側將水由30℃加熱至50℃，同時低溫側提供低溫的滷水將0℃的水結成冰，可使得特定建築物之空調系統發揮尖峰電力負荷(load leveling)平抑的效果，達到降低建築物電力契約容量，降低台電尖峰供電量，最具有效利用能源整合之特色。本系統除了具有節省運轉費用效益外更具有運轉安全度高而且不會排放廢氣造成環境污染的優點。
本研究之蓄熱儲冰主機運轉過程中，製熱性能係數(coefficient of performance of heating, COPH)可達2.595~3.663，製冷性能係數(coefficient of performance of cooling, COPc)可達1.595~2.663。
由蓄熱儲冰系統與一般傳統設計系統在運轉費用和二氧化碳排放量作比較，可得其運轉費用為一般傳統設計系統之14.11％ ~ 29.11％、二氧化碳排放量為一般傳統設計系統之74.89％
~93.04％。

關鍵字

蓄熱儲冰系統 ； COP

並列摘要

Screw compressors have been used by most of the maker of chiller units nowadays. Its refrigerant system can be designed according to different functions and environments to diversify the application for energy and multi-purpose application. We could expect the high-performance of efficiency, lowering consumption for fossil fuel, saving the system running cost and reduced the discharge quantity of Carbon dioxide at the same time.
This study is based on the concept of vapor compressing refrigerating cycle so heat and ice could be stored at the same time while the unit running on off-peak hour to contrast the difference of running expenses and discharge quantity for CO2 between the DTSS (Duo-thermal Storage System) and traditional design system (Chiller units and boiler).This system under the study is to warm up the high-temp side water temperature from 30℃to 50℃ on off-peak. Meanwhile, the water on low-temp side supplies low-temp brine water to freeze the 0℃ water to ice. So the load leveling of the air-conditioning system of the certain building can be balanced. Besides, the contract power capacity of the building and the burden of fulfilling the electricity requirement on-peak during day-time can be lowered. It is the characteristics of this study that the limited energy can develop the highest efficiency. This system also very friendly to the environment, no exhaust gas would pollute the air and always at its very high reliability and safety running pattern.
The coefficient of performance of heating (COPH),we could have from the Thermal Storage units under this research can is around 2.595~3.663 and the coefficient of performance of cooling (COPc ), is around 1.595~2.663 .
In comparison this application with the traditional system design, we can get the following conclusions:
The running expenses under this application cost only the 15.56％~41.39％ of the traditional system design while the discharge quantity of CO2 is only the 67.16％~82.71%.

並列關鍵字

Duo-thermal Storage System ； COP

參考文獻

[2] 國立台灣大學全球變遷研究中心，全球CO2追蹤網

Charles E.Dorgan,2000.

Heat Recovery system，pp.8.1~8.7，2004，

[7] FU SHENG Industrial CO.,LTD. SR Screw Refrigerant Compressor Instruction

[10] ASHRAE Fundamentals.CH-20 Thermophysical Properties of Refrigerant,