Abstract
In this study, cases of single-stage and multi-stage compression have been compared and contrasted through various angles while concentrating on refrigeration systems with 600 kW cooling capacity and working with ammonia. For five different numbers of stages, power consumption, costs of investment, operation and maintenance (O and M), COP and 2nd law efficiencies have been calculated. As the amount of stages increase, power consumption decreases. The payback period of the gain from this decrease has been calculated as far as the increasing investment expenditures are concerned. Dimensionless profit factor has been calculated according to each case and presented in the diagram.
Highlights
Increasing power consumption and the provision of power from significantly limited natural resources An application: Schematic layout of the three-stage in the world, cause costs rise day by day. system which is used as the calculation model has been
The most frequently used refrigeration cycle is the evaporator has been assumed as 5°C
The profit that will be obtained during the operation period of different refrigeration systems has been calculated in the following equation[12]: As seen in profit factor data, the most economical system is the three-stage one
Summary
Economic analysis for optimization of refrigeration systems. Increasing power consumption and the provision of power from significantly limited natural resources An application: Schematic layout of the three-stage in the world, cause costs rise day by day. system which is used as the calculation model has been. While interstage pressures are maintained, Probert[4] and Yumrutas et al.[5] Analyzed refrigeration the optimum values, which will minimize isentropic cycle basing their studies on the Second Law of compression work, have been calculated. Kaushik et al.[6] Derived a general in the case of a two-stage refrigeration system, the expression for the optimum COP of a refrigerator at minimum power input and given cooling load conditions They studied the effect of various operating optimal interstage pressure between the condenser and evaporator is P = (Pkon x Pev) 1/2 and in a case of a three-stage refrigeration system with two intercoolers, parameters on the cooling performance of the cascaded refrigeration cycles.
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