Exergy Transfer Analysis for Steam Power Cycle Device

Energy is conservative in its transfer and conversion process.While exergy is known to be non-conservative,it must have the special law for its transfer and conversion.According to the exergy transfer theory,the paper establish the exergy transfer model of unit and the devices for the Steam Power Cycle system.Some criterions to analyze and evaluate the devices and equipments such as the exergy fluid density,exergy fluid density reduction rate,exergy fluid density digressive rate coefficient are raised and defined.The calculation formulas for each criterion are also presented.Taking the technical transformation project in the power plant for example,the exergy transfer calculation is made.The results show that with reasonable utilization of small industry turbine,the power consumption ratio can be obviously reduced,and the thermal efficiency can be prominently enhanced.Therefore,it can provide the detailed suggestions to improve the design of Steam Power Cycle Device and direct the device operation.