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An energy-efficient multi-drying-chamber-based heat pump wood drying system.

Number: 1130

Author(s) : FIX A., PEI Y., SEABOURNE T., GAO L., YANG J., MUEHLBAUER J., HWANG Y., RADERMACHER R., YANG B.

Summary

The lumber industry is a carbon-intense industry that relies on the combustion of fossil fuels for wood drying. Heat pumps offer an efficient, electrically-driven alternative for the process heating in wood drying systems, though a unique system design is required to achieve substantial energy savings. In this work, we present a theoretical model for single-effect and two-effect heat pump wood drying systems, where the two-effect system recovers heat from one drying chamber and uses that heat to run a second drying chamber. Various low global warming potential (GWP) and natural refrigerants are evaluated, with propane standing out as the most advantageous. Under nominal conditions, the two-effect system could achieve a specific moisture extraction ratio (SMER) of up to 11 kg/kWh for an ideal dryer and an SMER of 4.5 kg/kWh under more practical conditions. The two-effect system achieves an SMER nearly two times that of the single-effect dryer.

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Pages: 12 p.

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Details

  • Original title: An energy-efficient multi-drying-chamber-based heat pump wood drying system.
  • Record ID : 30032664
  • Languages: English
  • Source: 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
  • Publication date: 2024/08
  • DOI: http://dx.doi.org/10.18462/iir.gl2024.1130

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