کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
787196 1466446 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on the improvement of CO2 air conditioning system performance using an ejector
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Experimental study on the improvement of CO2 air conditioning system performance using an ejector
چکیده انگلیسی

Several preceding researches have evidenced that the transcritical air conditioning system using CO2 as a refrigerant has an inherent inefficiency resulting in degraded steady-state system performance of a CO2 air conditioning system compared with that of a conventional air conditioning system. As a practical improvement, two-phase ejector was considered in place of expansion device in this study. The two-phase ejector for CO2 air conditioning system was designed and developed considering the non-equilibrium state for evaluating the sonic velocity and the critical mass flux. The experiments of performance with respect to variation of ejector geometry such as the motive nozzle throat diameter, mixing section diameter and the distance between motive nozzle and diffuser were carried out. There exist optimum design parameters in each test. Experiments showed that the coefficient of performance of the system using an ejector was about 15% higher than that of the conventional system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 34, Issue 7, November 2011, Pages 1614–1625
نویسندگان
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