The Thermodynamic Analysis On Low Boiling Point Working Medium Of Combined Power And Refrigeration Cycle

As is known to all, the residual heat can not be used usually and it is released to the air directly Since it is a kind of low taste energy.The efficiency of IHCP system is relatively low,and it will cause a lot of energy wasted.For these, the thesis lists several energy conservation and research of CCHP system, and then makes a comparison of primary energy consumption between CCHP system and IHCP system.The two cyclic working substances in CCHP system is ammonia, and the two cycles share a condenser. The heat energy utilization coefficient will increase when either of the temperature of superheated steam, the pressure of superheated steam, the evaporation temperature in regenerative cycle is rising; The heat energy utilization coefficient will decrease when either of the temperature of superheated steam, the pressure of superheated steam, the evaporation temperature in regenerative cycle is decreasing. The heat energy utilization coefficient will decrease when the condensation temperature is rising; The heat energy utilization coefficient will increase when the condensation temperature is decreasing.The changing rule of the heat energy utilization coefficient remain unchanged when the dynamic cycle and refrigeration cycle using two kinds of working medium.When putting the reheat cycle in the dynamic part, different reheating parameters make heat energy utilization coefficient have different variation, which is mainly depends on the reheat steam pressure.When putting the regenerative cycle in the dynamic part, the heat energy utilization coefficient will have a preliminary growth. In general, The heat energy utilization coefficient will be increased when the pressure in regenerative cycle is rising; The heat energy utilization coefficient will be decreased when the pressure in regenerative cycle is decreasing. When using compressor exhaust regenerative cycle, the heat energy utilization coefficient will also increase, but the effect is more obvious than regenerative cycle.The effect of using compressor exhaust regenerative cycle is more obvious when either of the evaporation temperature in refrigeration cycle, the temperature of Superheated steam in dynamic cycle is decreasing.The effect of using compressor exhaust regenerative cycle is less obvious when either of the evaporation temperature in refrigeration cycle, the temperature of Superheated steam in dynamic cycle is rising.The effect of using compressor exhaust regenerative cycle is more obvious when either of the evaporation temperature in refrigeration cycle, the temperature of Superheated steam in dynamic cycle is decreasing.The effect of using compressor exhaust regenerative cycle is less obvious when either of the evaporation temperature in refrigeration cycle, the temperature of Superheated steam in dynamic cycle is rising.The steam in the steam turbine will generate entropy because of the existence of friction resistance, which makes a contribution to the decrease of the heat energy utilization coefficient. The steam after through the evaporator will generate entropy because of the existence of friction resistance, which makes a contribution to the decrease of the heat energy utilization coefficient, which is because the entropy is irreversible process. When the working medium after the supercooling, its evaporating pressure will be low, which makes a contribution to the increase of the heat energy utilization coefficient.After the compared analysis of several different cycle, it is easy to see that the compressor exhaust regenerative cycle is more beneficial to energy saving and environment protection.