Device for testing heat exchange performance of solar thermal collector interpolated with nanometer fluid heat pipe

Abstract

The invention discloses a device for testing the heat exchange performance of a solar thermal collector interpolated with a nanometer fluid heat pipe. The testing device comprises a vacuum heat pipe, a glass vacuum pipe, a heat exchanger, a solar radiometer, an air velocity transducer and an environment thermometer, wherein the vacuum heat pipe is divided into an evaporation section and a condensation section, the evaporation section of the vacuum heat pipe is inserted into the glass-vacuum pipe, the condensation section of the vacuum heat pipe is connected with the heat exchanger, cold water is continually supplied for the condensation section of the vacuum heat pipe by a water tank, the inlet and outlet of the heat exchanger are respectively provided with a thermocouple, and the output ends of the thermocouples, the solar radiometer, the air velocity transducer and the environment thermometer are connected with a data recorder. The testing device disclosed by the invention has the advantages of simple structure, low cost and convenience in use, and can be used for testing the heat exchange performance of the solar thermal collector interpolated with the nanometer fluid heat pipe.

Description

Technical field [0001] The invention relates to a device for testing the heat exchange performance of an interpolated nano-fluid heat pipe solar collector. Background technique [0002] Nanofluid as a new type of enhanced heat transfer working medium is mainly used in two-phase flow and heat transfer, especially gas-liquid two-phase flow will be an effective way to greatly improve the heat transfer effect. Due to the small size effect of nanomaterials, its behavior is close to liquid molecules. Compared with traditional heat transfer fluids or fluids containing micron-sized solid particles, nanofluids have many advantages: (1) Nanoparticles have a larger specific surface area. It is expected to greatly improve the thermal conductivity and heat capacity of the fluid, thereby reducing the energy consumption of the circulating pump, reducing the cost, and reducing the wear of pipelines and equipment. (2) Due to the small size of the nanoparticles, the Brownian motion in the fluid m...

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Problems solved by technology

The current solar collectors mainly have the following disadvantages: (1) In low temperature, cloudy and windy weather, they cannot meet the needs of production and life; (2) The impact of harsh weather will lead to the destruction of its internal materials, resulting in poor performance , the system cannot operate normally; (3) The pressure-bearing capacity of the collectors produced by domestic collector manufacturers is low, especially after the collectors are connected in series or in parallel, the rubber sealing device at the connecting part between the collectors is pressure-bearing Weak point, it is prone to aging, not suitable for use in forced circulation

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