Siphon type fluid specific heat capacity measuring method

Abstract

The invention discloses a siphon type fluid specific heat capacity measuring method. A device adopted by the measuring method comprises a mixing container for accommodating mixed fluid, a fluid container for accommodating to-be-measured fluid, a temperature control heating mechanism for heating the fluid container at a constant temperature, an atomizing nozzle, two groups of inlet pipes communicated with an inlet of the atomizing nozzle, temperature measuring elements of each unit and a temperature display. According to the method, the working fluid and the to-be-measured fluid are rapidly and fully mixed through the siphonic effect, the temperature of the working fluid, the to-be-measured fluid and the mixed fluid and the mass of the to-be-measured fluid and the mixed fluid are measured, and the specific heat capacity of the to-be-measured fluid is measured according to the first law of thermodynamics. The siphon fluid to be measured in the measuring method is impacted by the high-speed working fluid to be atomized, heat exchange of the cold fluid and the hot fluid is sufficient, and the measuring method has the advantages of simple device structure, clear physical principle, simple data processing, short response time, small error and the like, and is suitable for accurately measuring the specific heat capacity of the fluid.

Description

technical field [0001] The invention belongs to the technical fields of fluid mechanics and heat, and in particular relates to a method for measuring the specific heat capacity of a siphon fluid. Background technique [0002] Liquid specific heat capacity is an important parameter in the application of liquid energy and fluid working medium. Accurate and reliable data are required in heat preservation, heat supply, heat storage pipeline design, working fluid material design, and energy storage material research and development. Accurate fluid specific heat capacity data is mainly obtained by experimental measurement. However, there are problems such as immature devices, limited measurement range and accuracy, and lack of relevant data in China. It is necessary to develop high-precision high-temperature individual specific heat measuring instruments. The traditional measurement methods of specific heat capacity of liquid mainly include electrothermal method, comparison method...

AI Technical Summary

Problems solved by technology

The traditional measurement methods of specific heat capacity of liquid mainly include electrothermal method, comparison method, mixing method, etc. The main disadvantages are that there are too many equipments and complicated operation, and human operation will have a great impact on the experimental results. Accurate results require a large number of complex calculations

Among them, the heating rod of the electrothermal method cannot heat the fluid to be tested evenly, and its stirring device easily causes heat dissipation and accelerates the evaporation of the liquid, so it cannot fundamentally solve the problem of heat exchange with the surrounding environment

The comparison rule has complex operations and a large amount of calculation, which makes it impossible to intuitively calculate the specific heat capacity of the liquid

However, when the traditional mixing method is used to measure the specific heat capacity of a liquid, it cannot effectively overcome the heat dissipation during the experiment and the error caused by the temperature measurement of the alcohol thermometer. In the end, it still needs to be manually corrected to obtain an accurate value.

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