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Effective thermal conductivity of adsorption packed beds.

Number: AD-YR2-1028

Author(s) : ROUHANI M., HUTTEMA W., BAHRAMI M.

Summary

This paper presents a comprehensive theoretical model for predicting the effective thermal conductivity of a randomly-packed bed as a function of number of adsorbent layers, particle size, bed porosity, water uptake, temperature, and gas pressure. Effects of the main parameters on the effective thermal conductivity and thermal contact resistance (TCR) of packed beds are studied. An asymptotic solution is proposed for randomly-packed bed. The present model can successfully predict the experimental results, with relative difference less than10% for temperature between 10 to 80 °C. Moreover, the effective thermal conductivity of FAM-Z02 is measured with a heat flow meter for several different numbers of adsorbent layers at various temperatures. The effect of thermal contact resistance (TCR) is deconvoluted from the measured bed thermal resistance. A significant effect of TCR to the bed thermal resistance is observed experimentally, i.e., 67% for 2 mm diameter FAM-Z02 at 25°C and atmospheric pressure.

Details

  • Original title: Effective thermal conductivity of adsorption packed beds.
  • Record ID : 30023093
  • Languages: English
  • Source: International sorption heat pump conference, ISHPC 2017, Tokyo august 7-10.
  • Publication date: 2017/08/07

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