Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-TH-25

NUMERICAL STUDY OF A TWO-STAGE ADSORPITON
CHILLER EMPLOYING RE-HEAT SCHEME WITH
DIFFERENT MASS RATIOS

M. Z. I. Khan1, SK. Farid2, S. Sultana3
1Bangladesh University of Engineering and Technology (BUET), Bangladesh
2Mirpur Girls’Ideal Laboratory Institute, Dhaka, Bangladesh
3Stamford University, Bangladesh

ABSTRACT

This paper deals with the performance investigation of a silica gel/ water-based two-stage adsorption chiller employing re-heat scheme with different mass ratios and compared with that of the two-stage conventional chiller with re-heat scheme using equal mass allocation (upper bed : lower bed = 1:1). The performance of a two-stage adsorption chiller using re-heat scheme with different mass allocation between upper and lower beds have been investigated numerically. Results show that cooling capacity can be improved with the optimum allocation of adsorbent mass to the upper beds than that of lower beds. The improvement in Co-efficient of Performance (COP) values, however, is less significant. It is also seen that the improvement in cooling capacity is more significant for the relatively higher heat source temperature. It is shown that the cooling capacity can be improved up to 8% if the heat source temperature is 80°C.

Keyword: Adsorption Cycle, Two-Stage Chiller, Re-Heat, Silica Gel, Water

Click here to download full report.