Multi-factor width parameter nanofluid heat transfer characteristic experimental system and experimental method

Abstract

The invention discloses a multi-factor width parameter nanofluid heat transfer characteristic experimental system and an experimental method. The system comprises three parts, namely an experimental loop, a pressure control loop and a cooling loop, wherein the experimental loop is composed of an ultrasonic oscillator, a circulating main pump, a heat regenerator, a mass flow meter, a preheating section, an experimental section, a data acquisition system and an electric heating system; the pressure control loop is composed of a high-pressure nitrogen and gas-liquid header and a safety valve; andthe cooling loop is composed of a cooling tower, a circulating pump and a cooling jacket. According to the experimental system, single-phase heat convection, flow boiling heat exchange and critical heat flux experimental researches under multi-factor and width parameter conditions can be performed aiming at nanofluid of different components under the condition that the stability of the nanofluidis maintained. The invention further provides an experimental method. The stability of the nanofluid is ensured, the influence of a dispersing agent or other additives is avoided, and the influence factors and mechanisms of the single-phase heat convection, flow boiling heat exchange and critical heat flux of the nanofluid can be conveniently researched.

Description

technical field [0001] The invention relates to the related research fields of single convective heat transfer, flow boiling heat transfer and critical heat flux of novel heat transfer nanofluids, and specifically relates to a multi-factor wide-parameter nanofluid heat transfer characteristic experimental system and experimental method. Background technique [0002] Nanofluids are highly expected by scholars to be used as coolants in high-power-density heat exchange systems to quickly remove heat from the system, reduce the temperature of various components, and improve the economy and safety of the system. Since it was put forward, in the study of the heat transfer characteristics of nanofluids, there have been obvious disagreements on whether the flow boiling heat transfer of nanofluids is enhanced. The analysis of the factors affecting the heat transfer characteristics of nanofluids is not deep enough. There is a huge gap in the mechanism, especially the mechanism of crit...

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Problems solved by technology

[0005] The article (Fang X, Chen Y, Zhang H, et al. Heat transfer and critical heat flux of nanofluid boiling: A comprehensive review [J]. Renewable and Sustainable Energy Reviews, 2016, 62:924-940.) pointed out that the current nanofluid boiling The research on heat transfer and critical heat flux does not take into account the influence of pressure, which largely restricts the progress of nanofluid-related mechanism research. To study the effect of pressure on nanofluid boiling heat transfer and critical heat flux, enrich the nanofluid exchange. It is very necessary and significant to understand the heat transfer characteristics of nanofluids from the mechanism of the study of thermal influence factors.

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