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Gas-fired air conditioning using a carbon-ammonia convective thermal wave cycle.

Author(s) : CRITOPH R. E.

Summary

The convective thermal wave is part of a patented cycle which utilizes the high number of transfer units and effectiveness characteristics of packed beds to obtain both high COP's and compact size from solid sorption pairs. Rather than heating the bed directly, it is possible to heat the refrigerant gas outside the bed and to circulate it through the bed in order to heat the sorbent. The high surface area of the grains leads to very effective heat transfer with only low levels of parasitic power needed for pumping. The new cycle presented here utilises a packed bed of inert material such as steel balls to store heat between the adsorption and desorption phases of the cycle. Experimental heat and mass transfer and pressure drop measurements have been made for argon (inert) and ammonia (adsorbed) passing through an active carbon bed at temperatures up to 200 deg C and flow velocities up to 0.5 m/s. There are used to model a complete cycle in an air conditioning application using a one dimension finite difference model.

Details

  • Original title: Gas-fired air conditioning using a carbon-ammonia convective thermal wave cycle.
  • Record ID : 1998-0292
  • Languages: English
  • Source: Ab-sorption 96. Towards sustainable technologies. Proceedings./ Ab-sorption 96. Vers les technologies durables. Comptes rendus.
  • Publication date: 1996/09/17
  • Document available for consultation in the library of the IIR headquarters only.

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