Comprehensive detection and evaluation system and method for heat dissipation loss characteristics of overhead steam heat supply network

Abstract

The invention relates to a comprehensive detection and evaluation system for heat dissipation loss characteristics of an overhead steam heat supply network. The comprehensive detection and evaluation system comprises a steam heat supply network main pipeline, a plurality of heat consumer branch lines, a heat source node, a plurality of heat consumer nodes, an enthalpy drop test section, a plurality of straight pipe surface heat dissipation test points, a plurality of bent pipe surface heat dissipation test points and a data processing terminal. The method has the beneficial effects that quantitative analysis of heat leakage in heat dissipation of different mechanisms in heat dissipation of the heat supply network is realized, the heat dissipation loss proportion of the heat supply network of different mechanisms is sorted out, and the accuracy and reliability of heat dissipation analysis of the heat supply network pipeline are improved; an internal and external heat flow meter method is adopted to accurately test heat leakage characteristics in heat preservation and heat dissipation, heat conduction and heat dissipation and heat leakage loss of a unit section of a pipeline are obtained, meanwhile, an enthalpy drop method is combined, pipe fitting heat dissipation loss on a test section is calculated, and finally the proportion of heat conduction and heat dissipation, heat leakage and pipe fitting heat dissipation is obtained. Quantitative characterization of the heat leakage proportion in heat preservation and heat dissipation is achieved, and a reliable basis is provided for accurate evaluation of heat preservation and heat dissipation performance.

Description

technical field [0001] The invention belongs to the field of heating network testing and energy saving, and in particular relates to a comprehensive detection and evaluation system and method for heat dissipation loss characteristics of an overhead steam heating network. Background technique [0002] With the construction and development of large-scale industrial parks in my country, the demand for steam in the industrial sector is increasing, the heating area and the length of pipeline laying are also increasing, and the long-distance steam heating network technology has been continuously matured and improved in practice. However, the increase of the heating area greatly increases the heat dissipation loss of the heating network, which seriously reduces the economy and reliability of the heating network system. Key points and difficulties in heat network technology. [0003] During the steam transportation process, the enthalpy value of the steam in the pipe keeps decreasi...

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Problems solved by technology

[0005] In the existing research, the research on the measurement of the characteristics of the heat dissipation loss of the heating network is not deep enough, the test methods of different types of heat dissipation losses are not accurate enough, and the application conditions are not clear

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