兩段式壓縮機中間冷卻型二氧化碳熱泵系統性能解析

Performance Analysis of two stage compressor intercooling on CO2 heat pump system

陳世榮(Shih-Jung Chen)

指導教授 ： 莊嘉琛

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2009年)

https://doi.org/10.6841/NTUT.2009.00631

摘要

近年來環境保護意識以全球暖化和臭氧層破壞等議題受到世界各國注目，所以開發新型冷媒為一項重要課題。在眾多自然冷媒中，以二氧化碳(CO2)冷媒(R744冷媒)最受注目，應具有無毒性、無可燃性、無臭氧層破壞、無/低全球暖化、價格便宜與環境協調性之優點，故可成為次世代冷凍空調系統冷媒。故本論文研究分析(1)分析單段和兩段式壓縮機中間冷卻型二氧化碳冷凍系統在固定冷凍容量下，各系統參數變化與COP性能係數之相互影響關係，以期得知系統參數與性能表現之最佳化相互關係。(2)藉以熱力學第一、第二定律能質解析在相同冷凍容量需求下，單段和兩段式壓縮機中間冷卻型二氧化碳熱泵系統之能耗量和COP性能係數，並獲得各別系統組成元件之可用能損失和系統可用能效率，以期得知二氧化碳熱泵系統性能提升依據。

關鍵字

自然冷媒 ； 二氧化碳熱泵 ； 可用能(exergy)分析

並列摘要

Since we have known that the global warming effects and the ozone layer depletion have been worse, more and more attentions have been paid on it. The issue of developing the new refrigerant is critical to the world. Among all the natural refrigerants, the most remarkable ones are CO2 refrigerant(R744 refrigerant), which should consist the advantages of non-toxic, non-flammable, non- ozone-depleting, non-global- warming, inexpensive and environmentally-coordination. Thus it can become next generation refrigerant of refrigeration and air-condtioning.
The discuss and research of this thesis are (1) under the fixed cooling capacity , analyzing the relations between the parametric variation and the coefficiency of performance(COP) with the types of single stage and two stage compressor intercooling CO2 heat pump system. To look forward to know optimum of the relations between the parametric variation and the COP. (2)according to the first and second laws of thermodynamic, by the demand of certain cooling capacity, to know energy consumption and COP of the single stage and two stage compressor intercooling CO2 heat pump system. Furthermore, it’s eager to know the exergy losses (anergy) and exergy efficiency of each system component. In the end, according to the results of this research, the sources can be used to improve the further systematical performance.

並列關鍵字

natural refrigerant ； carbon dioxide heat pump ； exergy analysis

參考文獻

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