Determination method of total heat transfer coefficient of condenser of thermal generator set

Abstract

The invention discloses a determination method of a total heat transfer coefficient of a condenser of a thermal generator set. The method is as follows: generator set load, circulating water flow, circulating water inlet temperature, the practical total heat transfer coefficient of the condenser, the total theoretical heat transfer coefficient of the condenser are input into a preset multiple regression equation under multiple test working conditions; and the coefficient of the equation is determined and the condenser heat transfer integrated revision factor of the condenser is obtained, so that the deviation influences among the structural characteristics, the operating condition and the theoretical value of the condenser are revised. In the determination method provided by the invention, the modifying factor is used so as to modify the total theoretical heat transfer coefficient which is calculated by a traditional empirical equation, of the condenser, and the total heat transfer coefficient with small error, of the condenser can be obtained, thereby improving the accuracy of energy-saving diagnosis and optimization management of the cold end system of the generator set.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a method for determining the overall heat transfer coefficient of a condenser of a thermal power generation unit. Background technique [0002] In the background of worldwide energy shortage, strengthening the economic operation of thermal power generating units has significant economic and social benefits. The loss of the cold end is the main factor restricting the thermal efficiency of thermal power generation, so it is of great significance to carry out energy-saving diagnosis and optimal management of the cold end. [0003] The condenser is the main equipment of the cold-end system of the thermal power generating unit. Its working performance directly affects the economy and safety of the whole unit. As a steam-water heat exchange equipment, heat transfer calculation is the core of its thermal calculation under variable working conditions. The overall heat t...

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Problems solved by technology

[0004] However, in the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: because the empirical formula fails to cover the respective unique structural characteristics and operating conditions of all condensers (such as tube bundle tube sheet arrangement, tube fouling degree, the amount of air accumulated in the condenser, etc.), although the empirical formula has a certain degree of versatility, it always has its imperfect considerations for each specific condenser. Therefore, in the actual application process, use experience There is always a large error between the overall heat transfer coefficient of the condenser calculated by the formula (called the theoretical overall heat transfer coefficient of the condenser) and the actual overall heat transfer coefficient of the condenser

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