Confirming method for turbine standard backpressure in thermal power generating unit energy consumption assessment and coal consumption check test

Abstract

The invention relates to a confirming method for turbine standard backpressure in a thermal power generating unit energy consumption assessment and a coal consumption check test. The standard backpressure is used for replacing rated backpressure with large deviation. The confirming method includes the steps that actual performance data of a cooling tower and a condenser are obtained through the test, circulation water amount and temperature rise data of the condenser are obtained, by means of combination of the test with calculation, the data obtained by the test and other design data of parameters are adopted, the standard backpressure is calculated and confirmed according to a general process, and circulation water schedule is based on an actual schedule way of an annual mean weather condition during testing. The obtained backpressure data results are truer than those of the rated backpressure, randomness of the current rated backpressure data results is avoided, backpressure conditions and equipment states of a machine set can be deeply understood, comparison with other machine sets is particularly facilitated, the confirming method is used for obtaining the accurate standard backpressure, the assessment of the situations and energy-saving potential of the machine set can be objective and deep, and the confirming method plays an important role.

Description

technical field [0001] The invention relates to the determination of the reference back pressure of the steam turbine in the energy consumption evaluation of thermal power units and the coal consumption checking test. The reference back pressure is used to replace the rated back pressure with large deviation by combining testing and calculation. Background technique [0002] The exhaust pressure of the steam turbine is also called the back pressure, which refers to the absolute pressure behind the blades of the last stage of the steam turbine, and is an extremely important parameter affecting the economy of thermal power units. The optimization of the design back pressure of the steam turbine is the basis for the selection of the steam turbine and cold-end equipment, and will directly relate to the economical operation of the unit. [0003] The condensing system of the steam turbine is that the exhausted steam after work enters the steam side of the condenser, and a large am...

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Problems solved by technology

[0011] When domestic electric power design institutes calculate the rated back pressure of thermal power units, many factors are ignored, and some data based on them are not accurate. The results often deviate from reality and lack representativeness. The above three aspects do not play well.

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