کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5017088 | 1466387 | 2017 | 45 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of ejector-equipped Joule-Thomson refrigerator operating below 77âK
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
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چکیده انگلیسی
The lowest attainable refrigeration temperature of a nitrogen based Joule-Thomson refrigerator is generally limited to 77âK since the compressor suction pressure is usually higher than atmospheric pressure. The Joule-Thomson process with an ejector is proposed to achieve a refrigeration temperature as low as 68âK by adjusting the evaporation pressure down to 28âkPa and boosting the return stream pressure up to 147âkPa. A one-dimensional numerical model is developed to predict the performance of the ejector at cryogenic temperature, and its accuracy is compared with experimental data. The analysis results show that the addition of the ejector in the Joule-Thomson refrigeration cycle increases up to 5 times the overall efficiency, where the maximum achievable COP and exergy efficiency are 0.0195 and 6.65%, respectively. Other featured advantages of the proposed Joule-Thomson refrigeration cycle with ejector are the simplicity of cycle, minimization of mechanical moving components, cost effectiveness, and high reliability compared to other cryogenic refrigeration methods using pumps or cold compressors in Joule-Thomson cycles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 78, June 2017, Pages 93-107
Journal: International Journal of Refrigeration - Volume 78, June 2017, Pages 93-107
نویسندگان
Jisung Lee, Cheonkyu Lee, Seungwhan Baek, Sangkwon Jeong,