The Fuel Specific Consumption Analysis Of Compression Refrigeration System

"The Fuel Specific Consumption Analysis theory" is a theoretical and computational method of energy usage, which is derived on the basis of exergy analysis and the second law of thermodynamics. Based on consumption theory we can calculate the irreversible loss, additional consumption and additional coal consumption of energy-consuming products of each equipment and all aspects of the production process. It can also get the anti-balance efficiency, which based on the second law of thermodynamics, according to anti-balance method.It can be more accurate when describing all aspects of energy usage of the energy system, using the exergy efficiency based on the second law of thermodynamics as the energy usage evaluation criteria of cooling system, than using the thermal efficiency based on the first law of thermodynamics. It can also clearly point out the irreversible loss of each process of cool (heat) production of the system. So that it can be more clearly when redesigning the device and doing energy-saving reform of the weaknesses in the cooling system.In this paper, the exergy efficiency model of different vapor compression cooling system was established for electricity and primary energy fired coal, based on consumption theory and the second law of thermodynamics exergy efficiency. It also considered the two-phase pressure drop of heat exchanger refrigerant into the irreversible loss in the cooling system, so that the additional consumption of each process of vapor compression cooling system and changes of cooling system exergy efficiency based on China’s annual average power consumption can be clearly obtained.