Integrated detection system for thermal performance of lower-medium vacuum compound insulation pipeline and application of integrated detection system

Abstract

The invention discloses an integrated detection system for thermal performance of a lower-medium vacuum compound insulation pipeline and application of the integrated detection system. The integrated detection system is composed of a control and data acquisition system, a conduction oil circulating system and a constant temperature chamber, wherein the control and data acquisition system is used for acquiring data including the temperature, the output power of an electric heater, the heat flow and the like on one hand, and controlling the temperature of a working steel tube, adjusting the output power of the electric heater and controlling the pressure of a vacuum layer on the other hand; the conduction oil circulating system is used for providing conduction oil of a certain temperature for a test tube section; the constant temperature chamber is used for keeping the temperature of the test tube section in a certain range. The integrated detection system disclosed by the invention has the beneficial effects that: the parameters including the temperature, the output power of the electric heater and the heat flow and the like can be automatically recorded and controlled; and the test result is accurate and high in reliability, which is helpful for research on a heat-transfer mechanism of the insulation pipeline.

Description

technical field [0001] The invention belongs to the technical field of thermal performance detection, in particular to an integrated detection system for thermal performance of a low-medium vacuum composite thermal insulation pipeline and its application. Background technique [0002] Heat pipeline is an important part of central heating system to transport hot water, steam and other heat media. In recent years, the temperature of the heat medium transported by mainstream heat pipelines at home and abroad has increased from about 150-250°C to over 600°C, and the steam pressure has reached above 2.5Mpa. The vacuum composite insulation layer in the thermal pipeline is a new technology to improve the thermal insulation performance of the pipeline, ensure the thermal parameters of the transported heat medium, enhance the anti-corrosion performance of the pipeline and dynamically monitor the leakage. In 2004, direct-buried pipelines with vacuum layer composite insulation with lo...

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Problems solved by technology

Judging from the literatures publicly reported at home and abroad, only the reports of various material physical property test devices and the overall thermal performance test device of the wall are seen, but no report of the thermal resistance test device of the overall thermal insulation structure of the composite thermal insulation pipeline, especially A report on the thermal resistance test device for the overall insulation structure of composite insulation pipes with a vacuum layer with low and medium vacuum degrees and suitable for heat medium temperatures as high as 200-350°C and above

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