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Développement d’une plateforme de régulation du dégivrage pour les unités de pompes à chaleur de toiture à usage commercial.

Development of defrost controller platform for commercial rooftop heat pump units.

Numéro : 2430

Auteurs : ALI J., SIDDHARTH R., ALEXANDER A., BACH C. K.

Résumé

Heat pumps are an increasingly attractive option for residential or commercial space heating applications. In the United States, where air conditioners are a standard for many buildings, an upgrade to air-source heat pumps is comparatively simple. The formation of frost on the outdoor heat exchanger coil surface leads to reduced heat transfer capabilities, compromising the heat pump's efficiency and capacity, a problem, especially for cold and humid regions. Defrosting is required to return the coil back to near original condition. The timing of the defrost initiation as well as the control of the defrost process are linked to the heat pump’s performance in the next heating cycle with many options for component speed paths during the defrost. Developing the necessary algorithms is challenging, and typical on-board platforms are more difficult to program than what can be done in higher level languages such as Python. This paper presents the development of a defrost controller prototyping platform using the Raspberry Pi microcomputer. Leveraging Raspberry Pi’s reliability, ease of debugging Python coding, ease of monitoring internal controller states, and cost-effectiveness, the controller ensures the seamless integration of the defrost function into prototype heat pumps.
Improving the overall efficiency and reliability of air source heat pumps in challenging environmental conditions requires robust defrost algorithms that can handle extreme ambient conditions as well as faulty sensors throughout the lifespan of the equipment. Robust controls contribute to the good reputation of heat pumps and by that to the advancement of sustainable and resilient heating technologies. The Raspberry Pi-based prototyping solution offers a practical and economical approach to control prototyping. Following a successful trial with the prototyping platform, there is potential for its utilization for a wide range of heat pump controls prototyping beyond solely defrosting controls.

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Pages : 9 p.

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Détails

  • Titre original : Development of defrost controller platform for commercial rooftop heat pump units.
  • Identifiant de la fiche : 30033131
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 17/07/2024

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