Share

IIR document

Performance of a packed bed absorber for an aqua ammonia absorption refrigeration system.

Author(s) : SELIM A. M., ELSAYED M. M.

Type of article: Article, IJR article

Summary

The model is used to predict the performance of the bed at various design and operating conditions. The governing equations and the boundary conditions are derived to predict the bed performance. A numerical integral method and an interaction scheme are used to solve the governing one dimensional, non-linear simultaneous differential equations which are subjected to three point boundary value problem. A computer program is prepared and carefully debugged to solve the governing equations with the help of some supporting equations to describe the properties of the working fluids and the heat and mass transfer coefficients in the bed. The analysis show that the absorption process is affected by the following parameters: the volumetric heat rejection model, bed height, vapour and solution flow rates to the bed and the inlet conditions; and packing material type. The effect of changing each of those parameters on the performance of the bed is studied after suggesting a model for the volumetric heat rejection from the bed. The results show that changing the bed pressure and/or the vapour inlet temperature have a negligible effect on the performance of the bed. Changing other parameters are found to affect the performance of the bed by different degrees. Also, the results show that within the present range of parameters, a bed height less than 0.7 meters guarantees an absorption efficiency better than 91%.

Available documents

Format PDF

Pages: 283-292

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Performance of a packed bed absorber for an aqua ammonia absorption refrigeration system.
  • Record ID : 1999-2889
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 4
  • Publication date: 1999/06

Links


See other articles in this issue (8)
See the source

Indexing