非共沸混合冷媒應用於具迴熱器內複疊冷凍系統之最佳配比的研究

Study on Low-Temperature Auto-Cascade Refrigeration Systems with Regenerator and Zeotropic Refrigerant Mixtures

唐欣傳(Hsin-Chuan Tang)

指導教授 ： 李宗興

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(2012年)

摘要

隨著科技的發展，能源，軍事，生物，醫療，生物科技等對超低溫的要求越來越高，尤其是在生物細胞保存技術方面，生物細胞的保存技術是影響移植成功的關鍵。內複疊冷凍系統使用非共沸混合冷媒、利用一台壓縮機，透過非共沸冷媒在高沸點和低沸點之間實現了自然分離與多級串疊的方法，達到製取-60℃至-160℃低溫的目的。內複疊系統性能特性主要受非共沸混合冷媒的影響，因此，冷媒種類的選取組成和濃度配比是關鍵。本研究主要目的為：利用理論分析之方式，探討非共沸碳氫混合冷媒R1150/R290、R1150/R1270、R1150/R600、以及R1150/R600a，應用於具迴熱器之低溫內複疊冷凍系統之最佳濃度配比及其最佳性能係數。研究結果顯示: 1).R1150/R600混合冷媒在R1150質量分比在0.11的時候有最佳COP值2.01. 2). R1150/R600混合冷媒最佳COP值2.01大於R170/R600混合冷媒最佳COP值1.34. 3) R1150/R600混合冷媒具迴熱器的系統最佳COP值2.21大於R1150/R600混合冷媒不具迴熱器的系統最佳COP值2.01.

關鍵字

內複疊冷凍系統 ； 非共沸混合冷媒 ； 碳氫冷媒 ； 迴熱器

並列摘要

With the development of technology, the requirement for cryogenic freezing is getting stricter in the scope of energy, military, bio-tech, and medical. Especially in medical, the cell preservation technique is the key of graft. Auto-cascade system uses zeotropic mixture as refrigerant to implement the natural separation and multi-stage cascade through the temperature glide for getting low temperature of -60°C to -160°C. The performance of Auto-cascade system is mainly affected by the zeotropic refrigerant, so the key point is to select the composition and fraction. The major issue of this study is to probe into the best fraction and COP of R1150/R290, R1150/R1270, R1150/R600, and R1150/R600a mixtures in Auto-cascade system with Regenerator through the theoretical analyzing. The study shows that 1). R1150/R600 mixture has the best COP 2.01 with R1150 mass fraction of 0.11, 2). The best COP 2.01 of R1150/R600 mixture is greater than the best COP 1.34 of R170/R600 mixture, 3). The best COP of R1150/R600 Auto-cascade with Regenerator has COP 2.21, which is greater than the value 2.01 of COP without Regenerator.

並列關鍵字

Auto-cascade ； zeotropic refrigerants mixture ； Regenerator ； HC refrigerants.

參考文獻

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