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Evaluation of the benefits in heat pump design when using a dynamic lumped-parameter model.

Number: pap. ID: 550

Author(s) : LEPORE R., REMY M., DUMONT E., et al.

Summary

A heat pump dedicated to building heating (e.g., of the air-to-water type) is subject to variations in the cold source temperature, in the load demand or even in capacity when performance is aimed at. Such changes influence the internal behaviour of the heat pump and a ad hoc control can be achieved provided that a dynamic model describing the mass and heat balances is used.
The authors introduce a dynamic, lumped-parameter model based on moving-boundary exchanger sub-models, static compressor and expansion valve sub-models. The interests of the model for heat pump sizing or for the design of thesuperheating control are shown. Moreover, a refined version of the model is presented here as the desuperheating region of the condenser is described separately, instead of being merged into the condensation region. The benefits of this enhancement are evaluated with respect to the superheating control. Validation through experience will take place in a future but high-priority development step.

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Pages: 8 p.

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Details

  • Original title: Evaluation of the benefits in heat pump design when using a dynamic lumped-parameter model.
  • Record ID : 30001983
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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