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Experimental assessment of a detachable plate falling film heat and mass exchanger couple using lithium bromide and water as working fluids.

Number: pap. n. 1563

Author(s) : HU T., YI Y., XIE X., et al.

Summary

Massiveness and cost have impeded the promotion of absorption heat pump (AHP) system for a long time. An improved detachable plate falling film heat and mass exchanger (HMX) couple using lithium bromide (LiBr) and water as working fluids is proposed and a resulting prototype is experimentally assessed. The HMX couple can work as either a generator-condenser couple, or an absorber-evaporator couple in an AHP using LiBr and water as working fluid. In generatorcondenser condition, overall heat and mass transfer coefficients of the generator were 0.607~1.008 kW×m-2×K-1 and 4.4×10-5~18.4×10-5 m×s-1 respectively, and overall heat transfer coefficient of the condenser varies from 0.372 to 1.466 kW×m-2×K-1; in absorber-evaporator condition, overall heat and mass transfer coefficients of the generator were 0.235~0.422 kW×m-2×K-1 and 0.7×105~1.5×10-5 m×s-1 respectively, and overall heat transfer coefficient of the condenser varies from 0.785 to 1.173 kW×m-2×K-1. The experimental results of the HMX couple prototype show feasibility to scale down the size of AHP, and promote application of absorption technology accordingly.

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Pages: 9

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Details

  • Original title: Experimental assessment of a detachable plate falling film heat and mass exchanger couple using lithium bromide and water as working fluids.
  • Record ID : 30026126
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1563

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