Optimization And Energy Saving Transforation Of Propane Refrigeration System

This paper conducts energy saving transformation research on the propane refrigeration device of shallow condensing recovery unit in Daqing oilfield. And this device has low efficiency, high energy consumption, and the problem of production process deviated from the original design values.Using PRO/â…¡software of chemical process simulation, Based on the SRK, PR, LKP thermodynamic equation of state, this study makes simulation calculation for cooling device, analyzes the influence of changing of condensation temperature, evaporation temperature and economizer temperature on cooling system, optimizes the values of condensation temperature, evaporation temperature and economizer temperature, and establishes optimization process of the cooling system with changing seasons.In order to further study energy-saving condition of refrigeration system, this paper analyzes energy consumption characteristics of optimization process from the view of energy-saving point. An exergy analyzing model for cooling system is set up. The models of exergy balance calculation for monomer equipment and systems are set up. Maximum exergy loss of monomers equipment and system is obtained, and improving measures are proposed, which provides theoretical basis for transformation process of the device.According to the results of optimization and exergy analysis, rehabilitation programs, which transform the water-cooled of cooling system to air-cooling, are proposed. And this programs combines with the characteristics of natural cooling source in Daqing field. After transformation, the condensing temperature can be reduced much more. And it solves the problem that the cooling system cannot normally work in summer. Through statistical analysis, transformation process improves the poor consumption situation of device, and achieves the purpose of energy-saving and emission reduction.