Abstract
Influence of operating temperatures at generator, absorber, condenser and evaporator on the performance of a single-stage vapour absorption refrigeration system (VARS) working with HCFC22-DMA, HCFC22-DMF and HCFC22-DMETEG pairs as working fluids is studied by performing thermodynamic analysis. Variations of circulation ratio (CR), heat load at each component, Carnot and thermodynamic coefficients of performance (COP cr and COP th ) and second law efficiency (∈) at various operating parameters are reported. It is deduced that the CR, COP th and ∈ decrease with T g while COP th decreases and CR and ∈ increases with T a and T C . Also, CR values are lower whereas COP th and ∈ values are higher at high T e . HCFC22-DMETEG yields the lowest value of CR at low heat source temperature while the change in CR between the considered pairs is negligible at high heat source temperature. HCFC22-DMA stands out when both COP th and ∈ are included.
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