Method for calculating heat supply steam pipeline production and acceptance evaluation thermal indexes

Abstract

The invention relates to a method for calculating heat supply steam pipeline production and acceptance evaluation thermal indexes. The method is used for a thermal power plant. After a heat supply steam pipeline is put into production, it is required to carry out construction acceptance and evaluation on the steam pipeline. At present, in relevant specifications and data, the evaluation and the acceptance of a heat supply pipeline network mainly relate to requirements for the insulation thickness of the pipeline or a support of the pipeline, but less relate to thermal indexes such as pressuredrop, temperature drop and heat loss. In the present invention, the heat supply steam pipeline production and acceptance evaluation thermal indexes include the temperature drop of the heat supply steam pipeline, the pressure drop of the heat supply steam pipeline, the leakage rate of the heat supply steam pipeline and the heat loss rate of the heat supply steam pipeline, and the method for calculating the temperature drop of the heat supply steam pipeline, the pressure drop of the heat supply steam pipeline, the leakage rate of the heat supply steam pipeline and the heat loss rate of the heatsupply steam pipeline is provided. A calculation result can be compared with a design value so as to evaluate the thermal performance of the heat supply steam pipeline.

Description

technical field [0001] The invention relates to a calculation method for evaluating a thermal index of a heating steam pipeline for commissioning and acceptance evaluation, which is used in a thermal power plant. Background technique [0002] Many power plants transform the units to increase external heat supply to increase economic benefits. Combined with the location of the power plant and the distance from the user, most of the heat supply transformation of the thermal power plant is in the form of a heat supply pipeline, that is, the steam is extracted from the set steam extraction port of the unit, and after pressure and temperature adjustment, it is led to the user. [0003] After the heating steam pipeline is put into operation, construction acceptance and evaluation of the steam pipeline is required. [0004] At present, the evaluation and acceptance of the heating pipe network in relevant specifications and data is mainly whether the insulation thickness of the pi...

AI Technical Summary

Problems solved by technology

However, for steam pipelines in operation, especially when they are just put into production, it is difficult to match the flow, pressure, temperature, etc.

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