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Improving the cost effectiveness of heat pumps for hot water installations.

Author(s) : GREYVENSTEIN G. P., ROUSSEAU P. G.

Summary

Air source water heating heat pumps (WHHPs) are extremely energy efficient when compared to direct electrical resistance heaters. However, although energy savings of approximately 67 per cent can be realized, the savings are often not large enough to offset the higher initial cost of the heat pumps. It is therefore essential to design water heating installations in such a way that the initial cost of WHHPs is substantially reduced. The paper shows that for a given daily hot water consumption, electricity tariff and heat pump unit cost, both the size (and therefore also the initial cost) of the heat pump and the life-cycle cost can be reduced by maximizing the daily runtime of the heat pump. The different factors involved in this problem are studied.

Details

  • Original title: Improving the cost effectiveness of heat pumps for hot water installations.
  • Record ID : 1998-0580
  • Languages: English
  • Source: Heat pumping technologies towards the next century: applications and markets. Proceedings of the 5th IEA Conference.
  • Publication date: 1996/09/22
  • Document available for consultation in the library of the IIR headquarters only.

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