Informatics Publishing Limited

S. Manu ¹, T. K. Chandrashekar ², C. Girisha ³

Affiliations
1 Department of Thermal Engineering, SSIT, Tumkur – 572105, Karnataka, IN
2 Department of Mechanical Engineering, MITE, Mangalore – 574225, Karnataka, IN
3 Department of Mechanical Engineering, AMCEC, Bangalore – 560011, Karnataka, IN

Abstract

The study attempts to optimize the parameters for LiBr –water absorption refrigeration system using Taguchi. The investigation was carried out to optimize the Coefficient of Performance (COP) for heat removal of 100W. The three factors considered were: Generator Temperature (Tg), Condenser Temperature (Tc), Absorber Temperature (Ta), Evaporator Temperature (Te). at three different levels. The L9 orthogonal array was selected and the best optimum conditions were identified based on Signal to Noise (S/N ratio) ratio, under the clause: larger is the best. The results showed generator temperature contribution is more on COP.

Keywords

LiBr-H2O, COP, Taguchi.

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S. Manu ¹, T. K. Chandrashekar ², C. Girisha ³

Affiliations
1 Department of Mechanical Engineering, SSIT, Tumkur, Karnataka, IN
2 Department of Mechanical Engineering, MITE, Tumkur, Karnataka, IN
3 Department of Mechanical Engineering, AMCE, Bangalore, Karnataka, IN

Abstract

The growth in industrialization and improvement in the science technology has developed a new system for the sophistication for the mankind. According to ASHRAE reported more than 50% of the generated power is consumed by the refrigeration and Air-conditioning systems. This resulted in the energy crisis and attributed to development novel systems like vapour absorption refrigeration system.  LiBr-H₂O (Lithium Bromide-water) vapour absorption refrigeration system showed the promising solution because it uses heat energy to run the system and also it uses natural refrigerant as water due to this there is no detrimental effect on the environment. The key components of this system are generator and absorber and there it is necessary to maintain required concentrations if not resulting in scaling in the line. The literature review showed that, conventional methods are used to determine the concentration. In this regard, the paper attempts to develop the new method to measure the concentration quickly, accurately and at low cost by using conductivity under ambient conditions. The results showed the accuracy in the measurement on compared with conventional method.

Keywords

Lithium Bromide, Concentration, Heat Pump, Conductivity.

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