• a simplified method to evaluate the energy performance of co2 heat pump units

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 598
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      the prediction of the performances of co2 transcritical heat pumps demands accurate calculation methods, where a particular effort is devoted to the gas cooler modelling, as the correlation between high pressure and gas cooler outlet temperature strongly affects the cycle performance. the above-mentioned methods require a large amount of input data and calculation power. as a consequence they are often useless for the full characterisation of heat pumps which are sold on the market. a simplified numerical method for the performance prediction of vapour compression heat pumps working in a transcritical cycle is presented, based only on performance data at the nominal rating conditions. the proposed procedure was validated against experimental data of two different tap water heat pumps. for the considered units, simulation results are in good agreement with the experimental ones. the deviations range from −6.4% to +1.7% and from −3.8% to +5.8% for the coph of the air/water heat pump and the water/water heat pump, respectively. the heating capacity deviations stayed within −5.5% and +1.7% range and within −5.0% and +7.9% range for the same units.

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