區域型地熱能熱電冷共生系統性能解析

Performance Analysis of District Geothermal Energy Cogeneration System

盧文添(Wen-Tien Lu)

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.2009.00633

摘要

台灣地區自產能源貧乏，絕大部份能源均需依賴進口，加上於二氧化碳減排意識日益抬頭，使得開發潔淨再生能源之重要性日益顯著。傳統化石燃料發電系統，不僅發電效率不高，而且會排放大量污染物，故需尋求潔淨發電系統；傳統冷凍空調系統為電壓縮型冷凍循環，不僅消耗大量電能，並且系統使用的合成冷媒含有導致臭氧層破壞及溫室暖化的物質，故需尋求替代冷煤或其他能源驅動型之冷凍空調系統。 台灣地區先天具有豐富地熱資源，因此本論文規劃將(1)低溫地熱用來驅動各型溴化鋰吸收式冷凍系統，分析其系統性能表現，並更進一步比較各型能源驅動吸收式冷凍系統之初級能源比(PER)及二氧化碳排放量。(2)使用高溫地熱來區域型驅動熱電冷汽電共生系統來產生熱能、電能與冷能於民生大眾使用，藉以熱力學第一、第二定律來解析地熱能熱電冷汽電共生系統，分析地熱能汽電共生系統之各組成子系統可用能損失和效率表現以及整體汽電共生系統性能特性，故可根據本研究結果來改善系統性能表現，以達到最佳化之區域型地熱能熱電冷汽電共生系統。 i

關鍵字

地熱能 ； 吸收式冷凍 ； ORC(Binary)循環 ； 汽電共生 ； 可用能(exergy)

並列摘要

Due to the limited indigenous resources in Taiwan, most energy resource are relied and imported from other countries. In addition, people are aware of carbon dioxide reducing and also the importance of clean renewable energy. With the inefficiency of the traditional fossil fuel systems and the pollutant emission, we need to look for any clean energetic system. Traditional refrigeration and air-conditioning are vapor compression refrigeration cycle that not only causes an enormous amount of electrical energy but leads to ozone-depleting and the global warming by releasing synthetic refrigerant substances. The reason why we need to seek the alternative refrigerant or even other energy lies in driven refrigeration and air-conditioning system.
Because of the abundance of natural geothermal resources in Taiwan, the thesis presents mainly on（1）Using low temperature geothermal energy to drive LiBr/H2O absorption system and analyze the performances of it. Furthermore, this thesis compares primary energy ratio (PER) and carbon dioxide emission of the various energy-driven absorption systems.（2）Using high temperature geothermal energy to drive district cogeneration system that provides thermal energy, electricity and cooling energy to the residence of the region. Analyze the geothermal energy cogeneration system with thermodynamic first and second laws, showing the analysis of the energy losses and efficiency of each subsystem and entire cogeneration system. Therefore, the results of this research can be used to improve the further systematical performance and achieve optimum of district geothermal energy cogeneration system.

並列關鍵字

Gothermal Energy ； Absorption System ； Organic Rankine Cycle ； Cogeneration System ； Exergy

參考文獻

[1]Enrico Barbier, “Geothermal energy technology and current status : an overview”, Renewable & Sustainable Energy Review, Vol. 6, pp. 3-65, 2002.

[2]John W. Lund, “Geothermal Energy Focus”, refocus, pp. 48-51, 2006.

[3]John W. Lund, Derek H. Freeston, Tonya L. Boyd, “Direct application of geothermal energy : 2005 Wordwide review”, Geothermics, Vol. 34, pp. 691-727, 2005.

[4]Ruggero Bertani, “World geothermal power generation in the period 2001-2005”, Geothermics, Vol. 34, pp. 651-690, 2005.

[5]Falin Chen, Shyi-Min Lu, Yi-Lin Chang, “Renewable energy in Taiwan: Its developing status and strategy”, Energy, Vol. 32, pp. 1634-1646, 2007.