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Energy, exergy and economic analysis of a vacuum belt drying system integrated with mechanical vapor recompression (MVR) for aqueous extracts drying.

Author(s) : XU P., ZHANG Z., PENG X., YANG J., ZHANG H., WANG Y., LI X., YUAN T., JIA X.

Type of article: IJR article

Summary

Vacuum belt drying (VBD) is a kind of continuous large-scale drying equipment that can effectively guarantee drying material quality but high energy consumption. In this paper, a novel mechanical vapor compression vacuum belt drying system (MVR-VBD) is constructed. And based on the vacuum belt drying experiment of traditional Chinese medicine aqueous extracts, the energy, exergy and economy analysis of VBD and MVR-VBD was investigated. Exergy efficiencies and exergy destruction rates of each component of the two drying systems were evaluated to improve the performance. As a result, the exergy efficiency of the vacuum pump of VBD is range from 61% to 81%, and the relative irreversibility of the heat source is much higher than other components. MVR technology can effectively reduce the powder of vacuum components and electric heating of VBD. The energy-saving ratio of MVR-VBD can reach 8.1% when the vacuum drying condition is 20 kPa, 100 °C, and the payback period is just 5 months. MVR technology is a suitable energy-saving technology for VBD.

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Pages: 96-106

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Details

  • Original title: Energy, exergy and economic analysis of a vacuum belt drying system integrated with mechanical vapor recompression (MVR) for aqueous extracts drying.
  • Record ID : 30030799
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 145
  • Publication date: 2023/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2022.09.021

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