Vol 6, No 4 (2015) > Mechanical Engineering >

Numerical Simulation of a Two-bed Solar-driven Adsorption Chiller in a Tropical Climate

Nasruddin Nasruddin, Lemington Lemington, Muhammad Idrus Alhamid

 

Abstract:

Cooling systems in tropical countries consume a
large part of energy usage in a building, especially in a tropical climate,
which places a high demand on cooling systems throughout the year. This paper
presents a simulation of a two-bed silica gel-water adsorption chiller,
utilizing solar energy based in the tropical climate of Indonesia. The
adsorption chiller is being mathematically modelled and calculated numerically
using MATLAB®. The simulation is used to show the performance of the chiller
during the working hours, based on maximum and minimum inputs of solar
irradiation in Indonesia Furthermore, mass recovery and heat recovery is also
applied in the adsorption cycle in order to increase the cooling capacity. The
adsorption chiller is based on the most recent chiller developed by Shanghai
Jiao Tong University (SJTU). The simulation results generally demonstrated the
running characteristics of the chiller under a range of different values of
solar radiation. Furthermore, the simulation results in detail showed that
during the maximum value of irradiation, the average value of COP can reach
0.26, while during the minimum value of irradiation the COP is 0.15. At the
same time, the cooling capacity is also varied which can reach up to the
maximum value of 37.8 kW, whereas in the minimum range of irradiation values,
the cooling capacity dropped to 5.3 kW.

Keywords: Adsorption chiller; Indonesia climate; Silica gel

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