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Chauffe-eau à pompe à chaleur économique.

Low cost heat pump water heater (HPWH).

Auteurs : MEI V. C., BAXTER V. D., LAMB D. S.

Résumé

Two low cost HPWH designs based on the immersed direct heat exchanger (IDX) condenser concept were developed and subjected to experimental evaluations. The initial concept achieved a laboratory measured energy factor of 1.79 and an average COP of 1.75 in a field test. It, however, required a modification of the standard water tank design to enable insertion of the IDX condenser into the tank. This was a problematic issue from the standpoint of added cost and lack of interest by water heater tank manufacturers. Therefore it was abandoned and a second design concept pursued that requires no modification of the tank. A laboratory proof-of-concept prototype HPWH based on the newer design achieved an energy factor of 2.02, 2.24 times higher than typical values for current electric water heaters. This result was achieved using a single wall immersed condenser design for the proof-of-concept lab tests. It is recognized that codes require that refrigerant-to-water heat exchangers in contact with potable water must be of a double-wall design. However, the test results show that the IDX concept is capable of yielding a HPWH design with reasonably high efficiency. The next phase of the work will focus on developing a workable double-wall condenser design and verifying HPWH performance with double wall condenser.

Documents disponibles

Format PDF

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Low cost heat pump water heater (HPWH).
  • Identifiant de la fiche : 2008-2281
  • Langues : Anglais
  • Source : 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Date d'édition : 17/07/2006

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