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A numerical investigation of the performance of a diffusion absorption heat transformer.

Number: pap. n. 72

Author(s) : WANG S. K., HE W., SUN S. F., et al.

Summary

The paper proposed a diffusion absorption heat transformer without mechanical solution pump and refrigerant pump by introducing the principle of the diffusion absorption refrigeration system. The performance of the diffusion absorption heat transformer which employed H2O as the refrigerant, E181 as the absorbent and R134a as diffusion gas has been investigated theoretically in detail. The results showed that the coefficient of performance (COP) is mainly determined by the following parameters at the specified generating temperature, evaporating temperature, ambient temperature and absorption temperature: system pressure, composition of the rich water solutions, composition of total solution and the distribution ratio of the weak solution. The optimum COP corresponding to the optimum system pressure can be found when the total composition of solution in the generator and the distribution ratio of the weak solution are specified and the composition of the rich water solutions is optimized. Increasing the concentrations of R134a and H2O in total solution are both helpful to improve COP. The application of diffusion absorption heat transformer provides a new way to realize the effective and reliable temperature lift of the industrial waste heat without electricity input.

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Pages: 10 p.

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Details

  • Original title: A numerical investigation of the performance of a diffusion absorption heat transformer.
  • Record ID : 30014349
  • Languages: English
  • Source: International sorption heat pump conference (ISHPC2014), College Park, United States, March 31-April 2, 2014.
  • Publication date: 2014/03/02

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