Dual-medium supercritical low-temperature thermal performance test platform

Abstract

The invention relates to a dual-medium supercritical low-temperature thermal performance test platform. The test platform comprises the following components: a low-temperature loop, a high-temperature loop and an ethylene glycol loop, wherein a first test sample machine and a second test sample machine are arranged in parallel in the low-temperature loop; in the high-temperature loop, a high-temperature medium circulation pump, a high-temperature loop flow meter and a valve for cutting off an opening and closing pipe connected in series by a high-temperature medium circulation pipe are arranged between a high-temperature loop storage tank and a hot-side medium channel of the first test sample machine; in the ethylene glycol loop, an ethylene glycol circulation pump, an ethylene glycol loop flow meter and a valve for cutting off an opening and closing pipe connected by an ethylene glycol circulation pipeline are arranged between an ethylene glycol storage tank and a hot-side medium channel of the second test sample machine. With the adoption of a technical scheme provided by the invention, the thermal performance test for heat exchange between a low-temperature medium and each of two media including high-temperature water and ethylene glycol can be realized, thereby greatly expanding a test range of the supercritical low-temperature medium. The low-temperature medium in the invention comprises, but is not limited to, liquid nitrogen, liquid oxygen, liquid argon, liquefied natural gas and the like.

Description

technical field [0001] The invention belongs to the field of cryogenic technology, and in particular relates to a dual-medium supercritical low-temperature thermal performance testing platform for testing the thermal performance of supercritical low-temperature fluid heat transfer and flow in a heat exchanger. Background technique [0002] With the deepening of people's understanding of supercritical fluid, not only its extraction has been widely used, but its heat transfer has also been applied in many fields. For example, in the field of LNG, the gasification of LNG in the gasifier, the liquefaction and gasification of air in the supercritical air energy storage system, the supercritical water reactor in the field of power generation, and the supercritical hydrocarbon fuel in the aerospace cold zone Aero-engine active cooling, etc. [0003] In these applications, especially in the field of low-temperature LNG and transboundary air energy storage systems, the core technolo...

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Problems solved by technology

[0006] However, there are many deficiencies in this low-temperature thermal performance testing platform

If the test pressure of the cold side is provided by the gasifier in the tank car, the test pressure cannot reach the supercritical state; the low-temperature medium is transported by the pressure of the low-temperature storage tank of the tank car, and does not have the flow adjustment function; the hot side is an open water cycle , only one test medium can be provided, and the test temperature can only be between normal temperature and 100°C

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