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Performance analysis of an open cycled AHP for recovery waste heat from sludge drying exhaust air.

Number: pap. n. 27

Author(s) : ZHENG J., CHEN G., YE B.

Summary

This paper presents an open cycled absorption heat pump (AHP) for recovering the waste heat from exhaust-air of waste-water sludge dryers. In order to recover the heat as more as possible in higher temperature, the absorption process was analyzed and optimized by using a “double-stage absorption” system. Steam with the saturation temperature of up to about 116? can be generated from the absorber. A double-effect generator is used to decrease the energy demanding for driving the heat pump and increase the COP. A thermal dynamic model was established to analyze the performance of the system. Considering the crystallization problem, the highest concentration of the absorbent say as LiBr-water solution was limited to 70% wt. The highest COP can reach 1.75.

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Pages: 9 p.

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Details

  • Original title: Performance analysis of an open cycled AHP for recovery waste heat from sludge drying exhaust air.
  • Record ID : 30013456
  • 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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