%0 Journal Article
%A Odunfa, K. M.
%A Fagbenle, R. O.
%A Oyewola, Olanrewaju M.
%A Ohunakin, O.S.
%D 2014
%F eprints:7423
%I Scientific Research Publishing
%J Energy and Power Engineering
%K Ammonia-Water Absorption Refrigeration, Magnetic Field Force, Ammonia Solution  Concentration, Coefficient of Performance, Finite Difference Scheme, Numerical Solution
%P 54-68
%T Magnetic Field Enhancement in  Ammonia-Water Absorption Refrigeration  Systems
%U http://eprints.covenantuniversity.edu.ng/7423/
%X Absorption enhancement has been considered as an effective way of improving coefficient of performance  (COP) of refrigeration systems and magnetic enhancement is one of these methods. A  model of magnetic field enhancement in ammonia-water absorption systems is presented in this  paper. A numerical model using finite difference scheme was developed based on the conservation  equations and mass transport relationship. Macroscopic magnetic field force was introduced in  the momentum equation. The model was validated using data obtained from the literature. Changes  in the physical properties of ammonia solution while absorbing both in the direction of falling  film and across its thickness were investigated. The magnetic field was found to have some positive  effect on the ammonia-water falling film absorption. The results indicate that absorption performance  enhancement increased with magnetic intensity. The COP of simple ammonia solution  absorption refrigeration system increased by 1.9% and 3.6% for magnetic induction of 1.4 and 3.0  Tesla respectively