Different strategies for long term performance of SAGSHP to match residential energy requirements in a cold climate

Francesco Reda (Corresponding Author), Ari Laitinen

    Research output: Contribution to journalArticleScientificpeer-review

    26 Citations (Scopus)

    Abstract

    Awareness about serious environmental problems due to fossil fuel consumption is increasing widely. Furthermore ground source heat pumps (GSHP) have increasingly been used for residential building heating and cooling in recent years and one promising configuration for cold climate is the solar assisted ground source heat pump (SAGSHP), where solar energy could be used for supplying heating energy to the building or for recharging the boreholes. Scientists pointed out that a key role is played by the strategy to control the solar-ground loop (Zhai et al.; Rad et al.; Kjellsson et al. ; Stojanovic and Akander). The presented paper focuses on a new control strategy for such systems aiming to maximize the solar energy use and energy savings. In order to compare different proposed and current operating modes and strategies of SAGSHP systems, simulations have been carried out with the simulation program TRNSYS. Results have shown that the proposed strategy is effective from a specific borehole depth; furthermore the temperature difference between solar collectors and ground source, which has to be exceeded for driving solar energy into the ground, has to be chosen prudently as a function of the borehole depth, the solar filed size and the auxiliary system typology.
    Original languageEnglish
    Pages (from-to)557-572
    JournalEnergy and Buildings
    Volume86
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Geothermal heat pumps
    Boreholes
    Solar energy
    Heating
    Heat pump systems
    Solar collectors
    Fossil fuels
    Fuel consumption
    Energy conservation
    Cooling
    Temperature

    Keywords

    • solar assisted ground source heat pump
    • residential building
    • energy savings
    • cold climate

    Cite this

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    title = "Different strategies for long term performance of SAGSHP to match residential energy requirements in a cold climate",
    abstract = "Awareness about serious environmental problems due to fossil fuel consumption is increasing widely. Furthermore ground source heat pumps (GSHP) have increasingly been used for residential building heating and cooling in recent years and one promising configuration for cold climate is the solar assisted ground source heat pump (SAGSHP), where solar energy could be used for supplying heating energy to the building or for recharging the boreholes. Scientists pointed out that a key role is played by the strategy to control the solar-ground loop (Zhai et al.; Rad et al.; Kjellsson et al. ; Stojanovic and Akander). The presented paper focuses on a new control strategy for such systems aiming to maximize the solar energy use and energy savings. In order to compare different proposed and current operating modes and strategies of SAGSHP systems, simulations have been carried out with the simulation program TRNSYS. Results have shown that the proposed strategy is effective from a specific borehole depth; furthermore the temperature difference between solar collectors and ground source, which has to be exceeded for driving solar energy into the ground, has to be chosen prudently as a function of the borehole depth, the solar filed size and the auxiliary system typology.",
    keywords = "solar assisted ground source heat pump, residential building, energy savings, cold climate",
    author = "Francesco Reda and Ari Laitinen",
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    language = "English",
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    T1 - Different strategies for long term performance of SAGSHP to match residential energy requirements in a cold climate

    AU - Reda, Francesco

    AU - Laitinen, Ari

    PY - 2015

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    N2 - Awareness about serious environmental problems due to fossil fuel consumption is increasing widely. Furthermore ground source heat pumps (GSHP) have increasingly been used for residential building heating and cooling in recent years and one promising configuration for cold climate is the solar assisted ground source heat pump (SAGSHP), where solar energy could be used for supplying heating energy to the building or for recharging the boreholes. Scientists pointed out that a key role is played by the strategy to control the solar-ground loop (Zhai et al.; Rad et al.; Kjellsson et al. ; Stojanovic and Akander). The presented paper focuses on a new control strategy for such systems aiming to maximize the solar energy use and energy savings. In order to compare different proposed and current operating modes and strategies of SAGSHP systems, simulations have been carried out with the simulation program TRNSYS. Results have shown that the proposed strategy is effective from a specific borehole depth; furthermore the temperature difference between solar collectors and ground source, which has to be exceeded for driving solar energy into the ground, has to be chosen prudently as a function of the borehole depth, the solar filed size and the auxiliary system typology.

    AB - Awareness about serious environmental problems due to fossil fuel consumption is increasing widely. Furthermore ground source heat pumps (GSHP) have increasingly been used for residential building heating and cooling in recent years and one promising configuration for cold climate is the solar assisted ground source heat pump (SAGSHP), where solar energy could be used for supplying heating energy to the building or for recharging the boreholes. Scientists pointed out that a key role is played by the strategy to control the solar-ground loop (Zhai et al.; Rad et al.; Kjellsson et al. ; Stojanovic and Akander). The presented paper focuses on a new control strategy for such systems aiming to maximize the solar energy use and energy savings. In order to compare different proposed and current operating modes and strategies of SAGSHP systems, simulations have been carried out with the simulation program TRNSYS. Results have shown that the proposed strategy is effective from a specific borehole depth; furthermore the temperature difference between solar collectors and ground source, which has to be exceeded for driving solar energy into the ground, has to be chosen prudently as a function of the borehole depth, the solar filed size and the auxiliary system typology.

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    KW - residential building

    KW - energy savings

    KW - cold climate

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