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Research on Heat and Humidity Transfer Performance Evaluation of Spraying Mine Exhaust Air Heat Exchanger

  • Lingling BaoEmail author
  • Yang Zhao
  • Xiu Su
  • Ziyong Wang
  • Yajing Rong
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 980)

Abstract

The indexes for evaluating the thermal performance of the spray chamber at home and abroad are introduced and analyzed. Due to the high relative humidity of the exhaust air in the mine, the air-water heat and humidity exchange process is usually carried out along the saturation line, and it is found that the general heat exchange efficiency is basically 1 through testing of different heat and humidity treatment processes, therefore, this indicator has been unable to accurately evaluate the performance of the heat and humidity exchange unit. An index for evaluating the heat and humidity exchange performance of the heat and humidity exchange unit is proposed, defining the heating efficiency and cooling efficiency by used water as the treatment medium in the heat and humidity exchange unit, taking the cooling and dehumidification process of counter-flow air-water heat and mass transfer as an example, the formulas for theoretical calculation include overall heat exchange efficiency, heat transfer efficiency and heating efficiency are derived, furthermore, three dimensionless efficiencies are obtained, and their relationship with the dimensionless mass transfer unit number and water-air ratio is analyzed. It provides a theoretical basis for thermal calculation and performance analysis of counter-flow heat and humidity exchange equipment.

Keywords

Mine return air Energy recovery Heat and mass transfer Efficiency Number of mass transfer unit (NTUm

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Lingling Bao
    • 1
    Email author
  • Yang Zhao
    • 1
  • Xiu Su
    • 1
  • Ziyong Wang
    • 1
  • Yajing Rong
    • 1
  1. 1.College of Energy and Environmental EngineeringHebei University of EngineeringHandanChina

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