Share

Absorption refrigeration cycle aided by compression and an auxiliary fluid.

Author(s) : CORONAS A., BOER D., HUOR M. H., PREVOST M.

Summary

The performance of absorption machines working in refrigeration mode can be improved by using an auxiliary fluid. When the working pair is ammonia-water or ammonia-sodium thiocyanate, the third component, immiscible in a liquid phase with the solution, could be an hydrocarbon (propane, isobutane, butane, pentane, etc). At a given evaporator temperature, there is a maximum temperature level allowed in the absorber for each hydrocarbon, increasing with their molar weight. But the cooling effect due to the presence of the auxiliary fluid decreases with it. A way to have the good performance due to the presence of the auxiliary fluid in a large range of absorber temperature is to use a compressor at the entrance of the absorber. So, the existence of a higher total pressure in the absorber than in the evaporator will allow the condensation of the hydrocarbon at higher temperature level. The first conclusion concerning the ammonia-sodium thiocyanate working pair is that the performance of that cycle aided by compression is much better compared with the basic absorption cycle in a large range of temperatures in the absorber and in the evaporator (compression energy lower than 15% of the energy supplied to the generator, at 0 deg C at the evaporator, 40 deg C at the absorber-condenser, with a COP of about 1.2 for the propane as an auxiliary fluid).

Details

  • Original title: Absorption refrigeration cycle aided by compression and an auxiliary fluid.
  • Record ID : 1993-3581
  • Languages: English
  • Source: Heat Pumps for Energy Efficiency and Environmental Progress: Proceedings of the 4th International Energy Agency Heat Pump Conference.
  • Publication date: 1993/04/26

Links


See other articles from the proceedings (62)
See the conference proceedings

Indexing