Share

IIR document

Measured and simulated behavior of heat pump in low energy building: short cycling and storage impact.

Number: pap. n. 40

Author(s) : SIMON F., PIRIOU C., CORGIER D., et al.

Summary

In a French research project, a new predictive building model tuning have been developed and applied to a fully occupied, well instrumented demonstrator 700 m² offices building with a high level of thermal insulation of the envelope. In the first part of the paper, the building characteristics with equipments and the monitoring specifications are described. In a second part, the development and validation process of the EnergyPlus building energy performance simulation model used in the project are explained. This experimental validation has been done in four steps: (i) building air tightness testing and HVAC equipment commissioning, (ii) tuning of parameters influencing dynamics calculation (iii) comparison of long term energy consumption (iv) analysis of heat pump equipment performances discrepancies especially with specific dynamic measurement campaigns. The high impact of the load factor on heat pump system efficiency and on start and stop cycles is clearly shown. In a third part, a parametric study is discussed to explain the heat pump system behaviour in running conditions. Two building models with quite different levels of thermal insulation and air tightness have been simulated in order to assess the monitoring analysis results. Then, the last part is dedicated to a parametric study performed so as to evaluate the impact of the hydraulic circuit (serial / parallel hydraulic circuit of the thermal energy storage tank with different storage sizes) of the heat pump system and control strategies used for its operation. An optimal operation scheme has been applied by simulation to the thermal energy storage system thank to a dedicated system model using MATLAB software. The efficiency of this optimal solution has been evaluated by simulation. The Coefficient Of Performance (COP) and the System Performance Factor (SPF) of the heat generation system are dramatically improved and number of start and stop cycles reduced.

Available documents

Format PDF

Pages: 8 p.

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Measured and simulated behavior of heat pump in low energy building: short cycling and storage impact.
  • Record ID : 30015075
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0040

Links


See other articles from the proceedings (657)
See the conference proceedings

Indexing