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Heat block device for reducing heat loss of experimental tube section in flowing heat exchange experiment

A heat loss and thermal experiment technology, applied in the field of experimental devices, can solve the problems of no heat dissipation compensation, inappropriateness, complex structure, etc., and achieve the effects of eliminating errors, reducing uneven distribution, and improving experimental accuracy.

Inactive Publication Date: 2013-05-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention is designed for industrial furnaces, and its structure is complex, which is suitable for application in industrial production. Moreover, this invention does not perform effective heat dissipation compensation. Therefore, for the insulation requirements of experimental pipe sections under laboratory conditions, this method is inappropriate

Method used

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  • Heat block device for reducing heat loss of experimental tube section in flowing heat exchange experiment
  • Heat block device for reducing heat loss of experimental tube section in flowing heat exchange experiment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036]When conducting the flow heat transfer experiment with the boundary condition of the adiabatic wall, the thermal block device is installed on the experimental pipe section 6 . The heat dissipation loss during the experiment can be obtained according to the temperature in the experimental pipe section 6 and the ambient temperature during the experiment. During the experiment, six pairs of thermocouples 4 are used to measure the temperature of the thermal block base 7 at different radial positions and depths , the average heat transmitted by the thermal block device to the experimental pipe section 6 can be calculated, and according to this feedback signal, the power of the heating rod 2 and the heating wire 3 is adjusted, so that the heat transfer amount of the thermal block device to the experimental section is equal to the heat dissipation of the experimental section to the environment, Finally, the required adiabatic boundary conditions are achieved.

[0037] When cond...

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Abstract

The invention discloses a heat block device for reducing heat loss of an experimental tube section in a flowing heat exchange experiment. The heat block device comprises a heat block matrix, a plurality of heating rods, a plurality of thermocouples and electric wires, wherein the heat block matrix is of a cylindrical shape; the experimental tube section is arranged in the center of the heat block matrix; the electric wires are wound on the periphery of the heat block matrix; the plurality of heating rods are annularly and uniformly distributed in the heat block matrix; an upper graphite gasket is sleeved at one end of the experimental tube section; a lower graphite gasket is sleeved at the other end of the experimental tube section; the plurality of thermocouples are divided into a plurality of groups; and the plurality groups of thermocouples are arranged with different depths in the heat block matrix. The heat block device disclosed by the invention can be used for compensating the heat radiation loss of the experimental section to the environment, is beneficial to improving the experiment precision of a thermal insulation boundary condition experiment, and can further realize a secondary boundary condition for simulating the flowing heat exchange, thereby being applicable to a flowing heat exchange characteristic experiment.

Description

【Technical field】 [0001] The invention belongs to the technical field of experimental devices, and in particular relates to a thermal block device for thermal compensation of an experimental section in a flow heat exchange experiment. 【Background technique】 [0002] When conducting a flow heat transfer experiment, such as an experiment on the flow characteristics in the tube under the condition of wall insulation, the requirements for the thermal insulation of the tube wall are often strict. In order to meet the requirements of the experimental conditions, the method of wrapping the insulation cotton outside the experimental section is generally adopted. However, this method has a disadvantage, that is, if the thermal insulation conditions required by the experiment are only met by wrapping the thermal insulation cotton, the thickness of the thermal insulation cotton required is often ten times the diameter of the test pipe section, and the use of thermal insulation cotton c...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 秋穗正巫英伟仇子铖刘建昌苏光辉田文喜
Owner XI AN JIAOTONG UNIV
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