Device for testing specific heat capacity of solution through heating by using approach method and testing method

A technology of specific heat capacity and approximation method, which is applied in the field of devices that use the approximation method to increase temperature and measure the specific heat capacity of a solution, and can solve the problems of long measurement period, large sample volume, and complicated operation.

Inactive Publication Date: 2018-03-20
UNIV OF SCI & TECH BEIJING +1
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Problems solved by technology

For example, the traditional adiabatic calorimetry method for measuring specific he...

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  • Device for testing specific heat capacity of solution through heating by using approach method and testing method

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Embodiment Construction

[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0026] The invention provides a device and a test method for measuring the specific heat capacity of a solution by using an approximation method to raise the temperature.

[0027] In the specific implementation process, the inner tube uses a glass tube with an inner diameter of 250 mm, a height of 80 mm, and a wall thickness of 1.5 mm. The outer cylinder uses a glass tube with an inner diameter of 350 mm and a height of 85 mm. The heating body in the inner tube is a cylindrical ceramic heating body. The inner and outer tubes and the heating rod casing are glass tubes, and the diameter of the inner tube is reduced. The thermocouple in the inner tube is an armored K-type thermocouple, and the thermocouple in the inner wall of the outer tube is a T-type the...

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Abstract

The invention discloses a device for testing the specific heat capacity of a solution through heating by using an approach method, and a testing method and belongs to the technical field of specific heat capacity testing. The device comprises an inner tube solution heating system, an outer tube automatic approach heating system, an outer tube vacuum thermal-insulating system and a data acquisitionsystem, wherein a solution is continuously heated through a built-in heating rod; a magnetic heating stirrer is powered on; and an inner tube solution is stirred by using a magnetic stirrer, and thena uniform temperature field is formed inside an inner tube. On and off of an outer tube heating circuit is controlled by a relay, then the temperature of an outer tube approaches to the temperature of the solution constantly, and heat exchange of the solution with the environment in a heat conduction manner is prevented. Meanwhile together with measures such as vacuuming and heat-preservation layers, heat of the solution is not radiated to the environment, and the heat of the heating rod can be completely adopted to heat the inner tube solution heating system. By virtue of an equation Q=Pt=cmdetalT, the specific heat capacity of the solution is tested, and in the equation, P is the heating power of a heating body and is directly tested by using a power meter. The device is simple in structure, convenient to operate, capable of automatically controlling the temperature of the outer tube, and high in control precision together with a PID (Proportion Integration Differentiation) algorithm.

Description

technical field [0001] The invention relates to the technical field of specific heat capacity measurement, in particular to a device and a test method for measuring the specific heat capacity of a solution by using an approximation method to raise the temperature. Background technique [0002] The specific heat capacity represents the ability of a substance per unit mass to absorb or release heat when the temperature increases by 1K without phase transition, and is an important physical property parameter for studying the thermal properties of materials. There are many methods for measuring specific heat capacity, but there are certain problems such as heat dissipation and uneven stirring. [0003] The mixing method is a method of mixing a substance with a known heat capacity and a substance to be measured. This method is mostly used for measuring the specific heat capacity of a solid, and is not suitable for measuring the specific heat capacity of a solution. [0004] The ...

Claims

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Application Information

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IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 宋清诗张辉张永杰刘应书刘志强张宣凯陈国军李东
Owner UNIV OF SCI & TECH BEIJING
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