کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
789484 1466439 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of heat pump performance by pulsation of refrigerant flow using a solenoid-driven control valve
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Enhancement of heat pump performance by pulsation of refrigerant flow using a solenoid-driven control valve
چکیده انگلیسی

The heating performance of an R410A heat pump system can be enhanced by a pulsatile refrigerant flow in a heat pump cycle. To generate the pulsatile refrigerant flow, a control valve was installed in parallel with the expansion valve located between the outlet of the condenser and the inlet of the evaporator in this system. Intermittent 200-ms openings of the control valve improved the heating performance because of two factors: the ‘pulsation effect’ that enhanced heat transfer and the ‘pushing effect’ that elevated the condensing pressure and increased overall mass flow rate. Heating capacity and COP (coefficient of performance) were increased by 4% and 3.2%, respectively, when the control valve operated at 0.005 Hz and 0.1% duty. In phenomenological view, two-phase invasion is considered when the control valve is operated.


► We report the heat pump system having pulsatile refrigerant flow.
► Heating performance increases by intermittent control valve opening.
► Heat transfer enhancement and pushing effect were the main factors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 35, Issue 6, September 2012, Pages 1547–1557
نویسندگان
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