Share

Monovalent and hybrid air-source heat pump concepts for existing multifamily buildings – Energy performance and CO₂ savings.

Number: 0947

Author(s) : BRISCHOUX P., FRAGA C., RÜETSCHI M., CALAME N., ROGNON F., HOLLMULLER P.

Summary

Heat pump suppliers only propose hydronic concepts for buildings up to 15 kWth, and very few suggest diagrams for large air-source heat pumps (> 50 kWth) in existing multifamily building. This paper analyses the energy and environmental performance of hybrid diagrams adapted to existing and large multifamily buildings via a validated numerical simulation model. The concepts correspond to different fuel-switch scenarios with the possibility of using existing boilers as a back-up. For each concept, sensitivity analysis assesses the impact of different levels of heat demand and heat pump capacity. As a result, over the different scenarios, the seasonal performance of the heat pump varies between 2.8 and 3.3, and the overall performance (heat pump and boiler) between 1.5 and 2.9. Considering the hourly CO₂eq content of the Swiss electricity mix, emissions of hybrid systems are 1.4 to 2.2 times higher than with a monovalent system. However, they remain 2.3 to 3.5 times lower than a gas boiler, which points out their adequacy as a transitional solution to proceed to a fuel-switch before retrofitting the building envelope.

Available documents

Format PDF

Pages: 12 p.

Available

  • Public price

    20 €

  • Member price*

    15 €

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

Details

  • Original title: Monovalent and hybrid air-source heat pump concepts for existing multifamily buildings – Energy performance and CO₂ savings.
  • Record ID : 30033522
  • Languages: English
  • Subject: Environment
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05

Links


See other articles from the proceedings (166)
See the conference proceedings

Indexing