Using economizer in R-744 heat pump cycle is an effective way to improve the heating capacity in cold climates. In this paper, a modification construction of reciprocating compressor with economizer port, a Voorhees compressor was introduced and the heat pump cycle with Voorhees economizer was compared with the traditional screw or scroll economizer cycles. Both the R-744 transcritical heat pumps with and without Voorhees economizer were tested at the same conditions with different air mass flow rates and different evaporating temperatures. The results show that the heating capacity of the heat pump with Voorhees economizer can be two times higher than the transcritical heat pump without economizer at low evaporating temperature conditions. At the same capacity operation conditions, the efficiency of the heat pump with Voorhees economizer is higher at high refrigerant mass flow rate conditions. The optimum discharge pressure of the heat pump with Voorhees economizer is found to be higher than the heat pump without economizer at the same ambient conditions. For mobile heat pump application, CO2 transcritical heat pump with Voorhees economizer demonstrates better performance comparing to the conventional transcritical CO2 heat pump without economizer when the evaporating temperature is lower than -20 deg C, or when the mobile is idling with low compressor RPM.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Investigation of R-744 Voorhees transcritical heat pump system


    Weitere Titelangaben:

    Untersuchung der transkritischen Voorhees-Wärmepumpe, betrieben mit R-744


    Beteiligte:
    Zha, Shitong (Autor:in) / Hafner, Armin (Autor:in) / Neksa, Petter (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2008


    Format / Umfang :

    7 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Transcritical CO2 heat pump air conditioning system control method and related equipment

    MA PENGCHAO / LU YAO / XU YONG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Transcritical CO2 air conditioner heat pump system control method for plateau rail vehicle

    CAO FENG / REN JIAHANG / SONG YULONG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Transcritical CO2 heat pump air conditioning system integrated thermal management control method and system

    SONG YULONG / XIE HONGSHENG / YANG MENGYING et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Transcritical carbon dioxide air conditioner heat pump PID regulation zone control method and system

    CAO FENG / JIA FAN / YIN XIANG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Electric vehicle thermal management system and method based on transcritical carbon dioxide heat pump air conditioner

    CAO FENG / WANG HAIDAN / SONG YULONG | Europäisches Patentamt | 2021

    Freier Zugriff