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Experimental research of heating characteristics on an air source heat pump system with capillary direct floor radiant.

Author(s) : NIU J., WANG H., LV T., XU S.

Type of article: IJR article

Summary

A new-type air source heat pump system with capillary direct floor radiant (ASHPCFR) was proposed, in which the vapor refrigerant condensed directly in the capillary under the floor to heat the room. Theoretical calculation of heat transfer in the capillary floor was conducted. The results indicated that the optimal capillary spacing should be 100 mm and it was best for a thickness smaller than 60 mm with the floor cement layer. An experimental apparatus for the ASHPCFR system was developed, and its low-temperature heating process and normal heating process were experimentally investigated. Experimental results showed that when the outdoor temperature was -5 °C, the indoor air temperature reached 20 °C after 120 min of running, while the temperature difference of a 20 mm thick cement floor could reach 1.73 °C and its maximum temperature could reach 27.5 °C. When the outdoor temperature was -10 °C, the system heating COP was stable at 3.06.

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Pages: 224-235

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Details

  • Original title: Experimental research of heating characteristics on an air source heat pump system with capillary direct floor radiant.
  • Record ID : 30033377
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 170
  • Publication date: 2025/02
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2024.11.031

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