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Reversible air-to-water heat pumps: annual performances in residential buildings.

Number: pap. n. 119

Author(s) : MADONNA F., BAZZOCCHI F.

Summary

The HVAC sector is paying a growing interest to the use of heat pump systems, which are able to produce relevant energy savings and to contribute to reaching the goal of a nearly zero energy building (NZEB). However there is still a lot of uncertainty on heat pumps’ actual performances in real life: indeed, the same unit could have a very different efficiency depending on local climate, settings, building characteristics and user behaviour. In order to investigate these effects, focusing on air-to-water heat pumps providing both space heating and cooling in small residential buildings, a field trial monitoring campaign was conducted on a “state of the art” unit. A model that simulates heat pump hourly efficiency was developed based on the data obtained from this in a field campaign and used to predict the behaviour, both in heating and in cooling mode, of similar heat pumps installed in a set of residential buildings located in different Italian cities. The study highlights how the climate and the building typology and age influence annual performances; in particular the role of the ratio between heating and cooling peak load and the benefits coming from a weather compensation strategy are discussed.

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Pages: 11 p.

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Details

  • Original title: Reversible air-to-water heat pumps: annual performances in residential buildings.
  • Record ID : 30008663
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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