- 學位論文
吸收式換熱器的熱力學分析及性能改進
Thermodynamic analysis and performance improvement of an Absorption Heat Transformer
摘要
在這個星球上，不同用途產生的全部能源中有40％以上是作為廢熱釋放的。大多數國家/地區都在試圖找到一些足夠的方法來回收廢熱。吸收式熱轉換器是回收廢熱的技術之一。 在這項研究中，對在三種不同的工作流體和增強的DAHT系統（雙吸收式熱轉換器）下運行的SAHT（單吸收式熱轉換器）循環的熱力學分析和系統改進進行了研究。通過工程方程求解器（EES）對三種循環液LiBr-Water，LiCl-Water和Water-NH3進行了模擬，以達到最大COP。在研究了不同的循環之後，考慮到許多因素，建議使用LiBr-Water作為最佳解決方案，對於單吸收熱變壓器（SAHT），COP約為0.51，COP較高。修改了雙吸收式熱轉換器（DAHT），以提高循環性能，達到0.64 COP。 與以前的研究相比，該系統在SAHT方面的改進達到了13％，在DAHT中與SAHT相比達到了20％。
關鍵字
吸收式換熱器的並列摘要
More than 40% of the whole energy produced in this planet from different applications is released as a waste heat. Therefore, most of the countries are trying to find some sufficient ways to recover the waste heat. Absorption heat transformer is one of the technologies to recover the waste heat. In this study a thermodynamic analysis and system improvement of a SAHT (Single Absorption Heat Transformer) cycles operating with three different working fluids and enhanced DAHT system (Double Absorption Heat Transformer) have been investigated. The three working fluids LiBr-Water, LiCl-Water and Water-NH3 were simulated for different cycles by Engineering Equation Solver (EES) in order to reach the maximum COP. After studying different cycles, LiBr-Water is suggested as the best solution for many considerations with high COP about 0.51 for single absorption heat transformer (SAHT). As well as a double absorption heat transformer (DAHT) was modified to improve the cycle performance to reach 0.64 COP. The improvement on the system has reached to 13% in SAHT compared with previous studies as well as 20% in DAHT compared with SAHT.
參考文獻
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