Title: Performance of chemisorption refrigeration system

Biography:

Michael John is PhD student at the age of 38 years at the University of Dar es Salaam, Tanzania. He is the Assistant Lecturer at the Department of Mechanical and Industrial Engineering. He has published 1 book chapter and international conferences papers.

Abstract

An experimental study of the adsorption performances of ammonia on calcium chloride was described. A single bed water cooled condenser adsorption refrigerator prototype, which utilises Calcium chloride-ammonia pair has been developed and tested in the laboratory. Experiments have been conducted for desorption temperatures of 100 ï‚°C with desorption time varying from 1hour to 4 hours using an electric tape heater and timer. The adsorption temperature profile, adsorption rate and the prototype performance have been analysed and discussed. For the tested heating desorption temperature of 100°C and heating desorption time of 1 hour to 4 hours, the cold chamber of the prototype obtained temperature between -0.8°C to 8.3°C which is in line with the vaccine requirement of 2°C  to 8°C . The estimated system COP ranges from 0.025 to 0. 076.