کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
789624 1466449 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transcritical carbon dioxide microchannel heat pump water heaters: Part II – System simulation and optimization
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Transcritical carbon dioxide microchannel heat pump water heaters: Part II – System simulation and optimization
چکیده انگلیسی

This paper presents the development of a transcritical CO2 heat pump water heating system model incorporating analytical heat exchanger models and an empirical compressor model. This study investigated the effects of a suction line heat exchanger (SLHX) and once-through versus recirculating water heating schemes. The once-through systems outperformed the recirculating systems by 10% for the system without an SLHX and 15% with an SLHX. However, a gas cooler twice as large is required. The SLHX was shown to benefit system performance at higher evaporator temperatures with improvements of 16.5% for the once-through and 4% for the recirculating systems. This study can be used to improve the design of microchannel based transcritical CO2 heat pumps; evaluate the impact of varying water inlet temperature, desired outlet temperature and evaporation temperature on system performance; and quantify the effect of differential diurnal electricity rates on system operating costs for these different operation schemes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 34, Issue 4, June 2011, Pages 870–880
نویسندگان
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