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Review of temperature and humidity control technology for heat pump and air conditioning systems.

Number: pap. 2386

Author(s) : LIN X., HWANG Y., RADERMACHER R., et al.

Summary

Indoor temperature and humidity are the two most significant factors to occupants’ thermal comfort. In residential and commercial buildings, split-type air conditioning systems have been widely used for its compactness and installation flexibility. However, the current split-type systems could not effectively control the thermal comfort of the occupants due to its insufficiency in humidity control. For the single-unit split-type system, the controller design is based on the concept of sensible heat factor (SHF) matching between the air conditioner side and the room side. The experimental and simulation studies are reviewed. It is concluded that this method is only applicable in a narrow operation range. This study also covers variable refrigerant flow (VRF) system, which is a typical multiple-unit split-type system. Existing temperature and humidity control in VRF systems is realized by introducing a solid desiccant heat pump (SDHP) unit. SDHP in the integrated system will cover part of latent and sensible cooling load of system. Both field tests and simulation work show that the integrated system has a better coefficient of performance (COP) than the original VRF system. In cooling season, the COP improvement is 25.7%. After the review of both the single-unit and multiple-unit studies, we further discuss the research progress of VRF system temperature controller design. Finally, based on the review and discussion, we proposed the necessary modifications required to apply single-unit temperature and humidity concept to VRF systems.

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Format PDF

Pages: 9 p.

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Details

  • Original title: Review of temperature and humidity control technology for heat pump and air conditioning systems.
  • Record ID : 30018758
  • Languages: English
  • Subject: Technology
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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