Simulation Analysis of the Dynamic Performance of a Solar Heat Pump Water Heater Operating in Medellin, Colombia

Santiago Valencia-Cañola, Cesar A. Isaza-Roldán, Carolina Mira-Hernandez, Carlos A. Bustamante-Chaverra, David A. Oliva-Patiño

    Producción científica: Capítulo del libro/informe/acta de congresoPonencia publicada en las memorias del evento con ISBNrevisión exhaustiva


    The dynamic performance of a direct-expansion solar heat pump water heater (DX-SHPWH) system, for domestic water heating application, is analyzed by means of an in-house numerical model considering typical environmental conditions in Colombia. The DX-SHPWH system uses a thermodynamic collector as an evaporator and a condenser submerged in an accumulation tank for water heating. Natural refrigerant R290 is selected as a working fluid due to its low global warming potential, compared to more common refrigerants, and its zero ozone depletion potential. Also, a photovoltaic system is included as a power source to harness a renewable source of energy. A basic design for the system is obtained via thermodynamic analysis at nominal operational parameters and time-averaged environmental conditions. The dynamic behavior of the basic design is simulated considering a transient energy balance equation for the water accumulation tank and pseudo-stationary energy balance equations for the components in the thermodynamic cycle. Time varying solar radiation and ambient temperature meteorological data from Medellin, Colombia are specified as inputs to the numerical model to assess the transient behavior of: water temperature, cycle working pressures, compressor power consumption and system coefficient of performance. From simulation results, relevant insights are obtained to improve basic component sizing and selection, including thermodynamic collector and a photovoltaic array for the system.

    Idioma originalInglés
    Título de la publicación alojadaASHRAE Virtual Annual Conference, ASHRAE 2021
    Número de páginas9
    ISBN (versión digital)9781955516006
    EstadoPublicada - 2021
    Evento2021 ASHRAE Virtual Annual Conference, ASHRAE 2021 - Virtual, Online
    Duración: 28 jun. 202130 jun. 2021

    Serie de la publicación

    NombreASHRAE Transactions
    ISSN (versión impresa)0001-2505


    Conferencia2021 ASHRAE Virtual Annual Conference, ASHRAE 2021
    CiudadVirtual, Online

    Nota bibliográfica

    Publisher Copyright:
    © 2021 ASHRAE.


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