Thermodynamic Analysis Of Steam Ejector And The Application In Energy Saving Reconstruction Of Variable Condition In Thermal Power Unit

Steam ejector due to its simple, reliable, low-cost is applied more and more widely in all walks of life. Firstly this paper is based on the thermodynamic method, design a suitable computational model of steam ejector theory. The process of the steam ejector is conducted with the thermodynamic analysis from the ideal and actual steam, and put forward a set of calculation method of steam ejector, then, the ejector coefficient and Momentum efficiency is analyzed emphatically. Because of the large capacity of main units need to take part in peak load operation, in low-load operating conditions, thermal efficiency and safety of thermal power units is decreased significantly at the time. This is grim situation of our electric power industry at present. This paper presents a revamping plan to a conventional system of thermal power units. It uses the steam ejector in thermal power unit to save energy in the transformation of the low load operation. Using the thermodynamic margin of the main and auxiliary equipments to improve the temperature of the boiler feed water, then, the heat economy of unit is improved. The computational method raised in this paper is used to calculate the transform of the case unit to prove the the considerable effect of energy saving. Then, the software called EBSILON is used to simulate the reconstruction of the case unit. And find that we get the same energy saving trend.