Device and method for testing heat exchange coefficient of cooling water pipe walls
A technology of heat exchange coefficient and cooling water pipe, which is applied in the field of devices for testing the heat exchange coefficient of cooling water pipe wall, can solve problems such as inconsistencies, and achieve the effects of low cost, easy garbage disposal, and high efficiency
Inactive Publication Date: 2015-08-05
HOHAI UNIV
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Problems solved by technology
J.-K. Yang, Y. Lee, J.-K. Kim. Heat transfer coefficient in flow convection of pipe-cooling system in massive concrete. J Adv Concr Technol, 9 (1) (2011), pp. 103– 114. Use a new device to calculate the heat exchange coefficient. The total length of the water pipe is only 1 meter. When this device is used, the surface temperature is controlled to a certain value, which is not in line with the actual situation.
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[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0027] like figure 1 and figure 2 As shown, a cooling water pipe wall heat exchange coefficient testing device is characterized in that it includes a sandbox 1, a cooling water pipe 2, a temperature probe 4, a heating rod 3 and a thermometer, and the sandbox 1 is a length × width A standard cuboid with a height of 1.7×1.2×0.83m is the main frame of the device. The 60-meter-long cooling water pipes inside the sandbox are evenly arranged in 5 layers in a serpentine shape, and the horizontal and vertical spacing of the cooling water pipes are 16.5× 16.5cm, the heating rods 3 are 24 in total, evenly laid in the middle of two layers of water pipes, a total of 4 layers, the horizontal and vertical ...
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The invention discloses a device for testing a heat exchange coefficient of cooling water pipe walls. The device is characterized by comprising a sand box, cooling water pipes, temperature probes and heating rods, wherein the cooling water pipes are uniformly arranged inside the sand box in an S shape; a heating rod is arranged between every two layers of cooling water pipes; and the temperature probes are arranged on the cooling water pipes from the inlets at intervals. According to the device and the method for testing the heat exchange coefficient of the cooling water pipe walls disclosed by the invention, due to the arrangement of the sand box, the cooling water pipes, the temperature probes and the heating rods, the heat exchange coefficient of the water pipe walls under the conditions of different materials, water with different temperatures and different flow velocities can be obtained by recycling the device, and the device is close to reality. Moreover, according to the device and the method for testing the heat exchange coefficient of the cooling water pipe walls, the temperature probes are arranged on the cooling water pipes from the inlets at intervals, the damaged probes can be timely replaced, and the test is not influenced.
Description
technical field [0001] The invention relates to a device for testing the heat exchange coefficient of a cooling water pipe wall, in particular to a sandbox for testing the heat exchange coefficient of a water pipe wall in which sand is used instead of concrete. Background technique [0002] After the self-cooling water pipe was applied in the American concrete dam-Hoover gravity arch dam in the 1930s, it was found that it could significantly reduce the maximum temperature inside the concrete. Later, because of its flexibility, adaptability and versatility, it has been widely used in the construction of concrete dams in various countries. [0003] The cooling effect of the water pipe is related to many factors, among which the more important is the relationship between the heat exchange coefficient of the water pipe and its material and the temperature and flow rate of the cooling water. Their values will affect the size of the concrete stress field during the construction ...
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Inventor 强晟别亚静沈振中
Owner HOHAI UNIV