High-temperature step combination-performance testing device for phase-change heat storage device and testing method

Abstract

The invention discloses a high-temperature step combination-performance testing device for a phase-change heat storage device and a testing method. The testing device comprises a filter, a draught fan, an air discharging valve, a flow meter, an air feeding valve, an air heater, an experiment connecting pipe, the phase-change heat storage device, a cooler, six high-temperature electrically operated valves, a plurality of temperature sensors, a plurality of pressure sensors and a data collection and control system. The highest temperature of heat transferring fluid of the testing device can be 800 DEG C, and the testable range is expanded; meanwhile, the step heat-storage technology of the phase-change heat storage device can be researched, the structure is compact, testing of the real and non-steady-state condition of a solar high-temperature air collector can be achieved, and testing is more comprehensive. According to the testing device, the used heat transferring working medium is air, and the testing device is environmentally friendly and free of pollution.

Description

technical field [0001] The invention belongs to the field of thermal energy industrial waste heat and solar thermal energy storage and utilization, and in particular relates to a comprehensive performance testing device and testing method for high-temperature cascade phase-change heat storage equipment. Background technique [0002] In view of the intermittent and unstable characteristics of new energy sources such as solar energy and industrial waste heat, it is necessary to adopt effective heat storage methods to solve the problem of time and space mismatch in energy utilization, effectively improve energy utilization efficiency, and alleviate Energy pressure and the promotion of sustainable development of social economy are of great significance. The phase change heat storage material has the advantages of high heat storage density and small temperature change during the heat storage and discharge process, and has become a heat storage material with broad application pros...

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Problems solved by technology

[0003] However, phase change heat storage materials still have shortcomings such as low thermal conductivity, severe corrosion, supercooling, and phase separation, which need to be improved through relevant experimental research.

At present, there are few studies on phase change heat storage equipment, and the temperature range of the test is small. At the same time, the function of the experimental device for performance testing of phase change heat storage materials and phase change heat storage equipment is relatively single. For example, most performance test platforms can only A single-stage test section, a single direction of flow direction or a fixed working condition test for a phase change thermal storage device cannot achieve a comprehensive performance test for a phase change thermal storage material or a phase change thermal storage device

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