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Numerical study of an ammonia/water absorption heat transformer to upgrade low-temperature industrial waste heat in regard to rising ambient temperature.

Number: 1108

Author(s) : COLLIGNON R., DEMASLES H., PHAN H. T.

Summary

Multiple industries require heat at a high temperature while dissipating heat at moderate to low temperature. In this context, sorption systems are a promising solution able to valorise waste energy at a low electricity cost, up to ten times less electrical power compared to an equivalent vapor compression heat pump. Specifically, Absorption Heat Transformer (AHT) are a type of absorption machine able to recover lowlevel waste heat (~80°𝐶) in order to provide higher-level heat (> 100°𝐶). In this study, a single stage AHT based on the NH3/H2O mixture is developed. Results enable to evaluate the performances of the AHT fed by industrial waste heat and cooled by ambient air and show that the standard architecture is limited by summer operating conditions. The influence of both the waste heat and ambient air temperatures are evaluated and the effect of the inclusion of a compressor in the cycle is discussed.

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Pages: 8 p.

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Details

  • Original title: Numerical study of an ammonia/water absorption heat transformer to upgrade low-temperature industrial waste heat in regard to rising ambient temperature.
  • Record ID : 30034168
  • Languages: English
  • Subject: Technology
  • Source: 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Publication date: 2025/08
  • DOI: http://dx.doi.org/10.18462/iir.adaptation.2024.1108

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