Distributed energy supply system research of gas, solar steam-organic working fluids combined cycle based on different organic working fluids (July 2014)

In order to improve energy efficiency, realize energy-saving and emission reduction, now taking natural gas and solar as energy, water vapor and organic fluid as working medium, thermodynamic model and energy efficiency model of combined cycle distributed energy system were built, and its thermal economy calculated and organic working fluids screened. And now taking a domestic airport distributed energy unit for example, Based on the complementary role of solar energy and the small latent heat of vaporization of organic working fluid characteristics, The distributed energy supply system of natural gas, solar steam - organic working fluid combined cycle was built. After thermal economy calculation results show that: under the 100%, 75%, 50% cooling (heating) conditions, the new model maintains the total heat consumption of the original unit, the cold source loss of the unit reduced, thermal economy improved; through screening 3 organic working fluids, R245FA is the more suitable organic working fluid for new model.