臺灣博碩士論文加值系統

本研究主要是以有限時間熱力學的方法應用於不可逆具熱共生之開式布雷頓循環分析。不可逆具熱共生之開式布雷頓循環包括:具熱共生簡單循環及具熱共生傳統回熱循環。循環內最佳化分析的目標函數為整體有用能率與熱效率。此外，藉由可用性觀點分析熱回收裝置，並提出一個新的系統參數加以討論。本文藉由EES 軟體分析熱力循環系統內參數如壓縮比、功熱比、循環系統內高溫比和最低用戶需求溫度比對於整體有用能率與熱效率的影響。並分析無因次化整體有用能率與其對應熱效率間的變化關係。觀察藉由可用性分析熱回收裝置所提出新的系統參數，可得知具熱共生循環更接近於實際循環的情形。

In this paper, the method of finite time thermodynamics was adopted
on the investigations for the irreversible open-Brayton cogeneration
cycles. Two kinds of irreversible cycle are studied including the simple
gas-turbine cogeneration cycle, and the conventional regenerative cycle
with cogeneration. The analysis of the objective function for optimization
is achieved in the total useful energy rate and the thermal efficiency.
Furthermore, a new performance coefficient concerning in the heat
recovery is proposed by the assistance of the availability analysis. In
order to analyze the thermodynamic cycle system, the effects of various
influential parameters including the pressure ratio, the ratio of
power-to-heat, the maximum cycle temperature ratio, and the user’s
demand thermal energy ratio on the total useful energy rate and the
thermal efficiency are numerically assessed by using the EES software.
Variations of the dimensionless total useful-energy rate with to the
thermal efficiency have also been studied. It is observed that the new
performance coefficient based on the availability of the recovery heat
may guide towards a more realistic criterion for actual cogeneration
cycles.

目錄
摘要 Ⅰ
Abstract Ⅱ
誌謝 Ⅲ
目錄 Ⅳ
圖目錄 Ⅵ
表目錄 Ⅹ
符號說明 XI
第一章 緒論1
1.1 研究動機與背景 1
1.2 文獻回顧 3
1.3 本文架構 5
第二章 具熱共生之簡單循環之整體有用能率分析 6
2.1 熱力循環模型 6
2.2 分析與討論 12
第三章 具熱共生之傳統回熱循環之整體有用能率分析 26
3.1 熱力循環模型 26
3.2 分析與討論 32
第四章具熱共生布雷頓循環之可用性分析 47
4.1 熱力模型 47
4.2 分析與討論 50
第五章 結論與未來展望 59
5.1 結論 59
5.2 未來展望 60
參考文獻 61

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