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Detailed and dynamic variable speed air source heat pump water heater model: Combining a zonal tank model approach with a grey box heat pump model.

Author(s) : DEUTZ K. R., CHARLES G. L., CAURET O., et al.

Type of article: Article, IJR article

Summary

Air Source Heat Pump Water Heaters (ASHPWHs) are efficient and fast-developing sanitary hot water production systems for the building sector. However, it was shown that their energy performance can still be improved. Therefore, a dynamic grey box Modelica based model is developed representing a split type ASHPWH with a mantle heat exchanger. The thermal storage model includes a zonal model to model convection during heat-ups and the heat pump is modeled using the TIL® thermal component library. The model is first compared to dynamic experimental data during 9 heat-up tests under various operating conditions, including low temperature defrosting stages. On such heating periods, the overall mean relative error reached is of 2% for the COP and the maximum temperature error over the height of the tank is less than 1°C. The model is reproducible and can be used to conduct further design based optimization studies.

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Pages: 55-69

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Details

  • Original title: Detailed and dynamic variable speed air source heat pump water heater model: Combining a zonal tank model approach with a grey box heat pump model.
  • Record ID : 30024286
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 92
  • Publication date: 2018/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.05.022

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