A liquid specific heat capacity measurement system

Abstract

The invention discloses a liquid specific heat capacity measurement system which comprises a liquid flow circulation module, wherein the liquid flow circulation module comprises a sample container, a flow pump, a calorimeter, a cooler and an expansion box, wherein the sample container is connected with the flow pump through a conveying tube, the flow pump is connected with the calorimeter through a conveying tube, the calorimeter is connected with the cooler through a conveying tube, the cooler is connected with the expansion box through a conveying tube, the expansion box is connected with the flow pump through a conveying tube, and an electromagnetic valve is arranged on the conveying tube between the expansion box and the flow pump. The liquid specific heat capacity measurement system has the beneficial effects that the specific heat capacity of a liquid at high temperature is measured, the resolution of temperature measurement is high, the temperature control is accurate, the heat loss is reduced to the greatest extent, the uncertainty of measurement is reduced, the accuracy of a testing result is improved, and the scope of application is expanded.

Description

technical field [0001] The invention relates to the field of specific heat capacity measurement, in particular to a liquid specific heat capacity measurement system. Background technique [0002] As the basic physical property of fluid, specific heat capacity is an important physical quantity for evaluating fluid materials, especially functional fluid materials, in current scientific research projects and industrial production processes, and it is also one of the important parameters in the design and calculation process of fluid working medium thermal system. Accurate fluid specific heat capacity data is mainly obtained by experimental measurement, and there are many measurement methods, which can be divided into two categories: cooling method and heating method according to the heat exchange method of the calorimeter. The heating method is relatively easy to realize in engineering practice and experimental measurement, so it is widely used. Heating method can be divided i...

AI Technical Summary

Problems solved by technology

In developed countries such as Europe, America, Japan, etc., due to the good industrial foundation, perfect intellectual property system, and long-term healthy competition in the market mechanism, there are many thermal physical property measuring instruments that can be used in laboratories and industries. Among them, the specific heat of liquid can be measured. The instruments used are: 1) C80 microcalorimeter from Setaram Company in France, the applicable temperature range of this instrument is from room temperature to 300°C, and this project needs to measure the specific heat capacity of liquid at 0°C to 350°C; 2) KD2Pro from DECAGON Company in the United States Thermal characteristic analyzer, the test temperature range of this instrument is -50 ~ 150 ℃, the specific heat measurement accuracy is 5%, its temperature range and measurement accuracy cannot meet the requirements of this project; 3) Japan Kyoto Electronics Industry Co., Ltd. (KEM ) SHA-500 Liquid Specific Heat Capacity Tester; the measuring temperature range of this instrument is 4-85°C, and the temperature range is narrow, so it cannot be used to measure the specific heat capacity of high-temperature liquids

[0004] In China, the corresponding liquid specific heat measuring instruments are not yet mature, among which the HC2000 liquid specific heat meter of Xi'an Xiaxi Electronic Technology Co., Ltd. is relatively mature, and most of the others are relatively simple measuring devices, integrated and automated The degree is low, there are problems such as low measurement accuracy, repeatability, and poor stability, which cannot meet the needs of industrial applications

[0005] To sum up, the existing liquid specific heat capacity measuring instruments and equipment have a narrow measurement temperature range, or low precision, low degree of integration and automation, limited application range, and it is difficult to meet the specific heat capacity measurement requirements of high temperature liquids.

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