Ice water heat exchange coefficient experimental apparatus and measurement method

A technology of heat exchange coefficient and experimental device, applied in the field of ice-water heat exchange coefficient experimental device and measurement, can solve the problems of slow water flow, difficult to directly transplant and adopt, and no report.

Active Publication Date: 2014-02-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the subglacial water flow velocity of sea ice and river ice is relatively fast, generally above 0.1m / s, while the water flow in the reservoir is relatively slow, generally below 0.1m / s, especially in the middle of the reservoir to the front of the dam. Therefore, there is a significant difference between the water quality or flow rate of the reservoir and the applicable conditions of the ice-water heat exchange coefficient of river ice and sea ice obtained through research, and it is difficult to directly transplant and adopt it. The research on water heat exchange coefficient has not been reported at home and abroad

Method used

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  • Ice water heat exchange coefficient experimental apparatus and measurement method
  • Ice water heat exchange coefficient experimental apparatus and measurement method
  • Ice water heat exchange coefficient experimental apparatus and measurement method

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Experimental program
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Embodiment 1

[0064] In this embodiment, the structure of the ice-water heat exchange coefficient experimental device is as follows: Figure 1-5 As shown, it includes a water tank 1, a water pump 3, a gate valve 4, a thermostat 5, a flow meter 6, an ice thickness change measuring instrument 7, and a temperature recorder 8. The thermostat 5 is connected to each other, and the thermostat 5 is connected to the water inlet of the water tank through the pipeline 2 to form a loop. The measuring probes of the flow meter 6 and the temperature recorder 8 measuring probes are all located in the water tank, and the measurement of the ice thickness change measuring instrument 7 The probe is located in the ice layer 19 and water in the tank.

[0065] The water tank is composed of a connected water inlet section 16, a water outlet section 17, and a measuring section 18 between the water inlet and outlet sections. Section 18 is connected to the water tank, and the left horizontal part coincides with the ...

Embodiment 2

[0070] Utilize the method in the device measurement ice-water heat exchange coefficient in embodiment 1, the measurement step of this method is as follows:

[0071] (1) After the water tank 1, the water pump 3, the gate valve 4, and the thermostat 5 are connected and filled with water, the vertical partition 10 is bonded to both ends of the measuring section 18 of the water tank with plexiglass glue to form a water tank with both ends closed , and filled with water to a water depth of 0.26m, and the water depth is 0.01m to submerge the wooden strips. A temperature measurement section 15 is selected in the middle along the transverse direction, and a temperature chain consisting of 7 temperature recorders and 8 measuring probes is arranged vertically downward at 5 mm below the water surface, dense at the top and sparse at the bottom. After setting, start the temperature recorder 8, then choose the ice thickness variation measurement section 14 after the temperature measurement ...

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Abstract

The invention provides an ice water heat exchange coefficient experimental apparatus which comprises a water tank 1, a water pump 3, a gate valve 4, a thermoregulator 5, a current meter 6, an ice thickness change measuring instrument 7 and a temperature recorder 8, wherein the water pump 3, the gate valve 4 and the thermoregulator 5 are sequentially connected through a pipeline 2 and form a loop; measurement probes of the current meter 6 and the temperature recorder 8 are positioned in the water tank 1; a measurement probe of the ice thickness change measuring instrument 7 is positioned in an ice layer 19 and water in the water tank. The invention also provides a method for measuring an ice water heat exchange coefficient by utilizing the device. The device well simulates reservoir icing and low-flow speed water flow conditions, acquires an ice water heat exchange coefficient of a corresponding reservoir and provides a design basis for water conservancy projects, also avoids the difficulty of developing reservoir ice water heat exchange coefficient prototype measurement in a rushing frigid zone reservoir area and provides great convenience and implementation possibility for research.

Description

technical field [0001] The invention belongs to the field of ice-water heat exchange coefficient experimental device and measurement technology, in particular to an experimental device and measurement method for ice-water heat exchange coefficient with flow velocity below 0.1m / s. Background technique [0002] At present, the construction of water conservancy projects in my country is gradually advancing to high-altitude frigid regions. One of the problems that must be considered in the construction of reservoirs in frigid regions is the freezing of reservoirs in winter. Whether drift ice or stable ice sheets are formed after the reservoir freezes, it will first directly affect the winter reservoir shipping, hydropower generation, and canal system transportation. The safety of water, etc., especially after serious ice conditions such as ice jams and ice dams, will also lead to natural disasters such as flooding, which will bring significant losses to people's property and lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
Inventor 脱友才邓云李嘉李克锋李然梁瑞峰安瑞冬李楠何天福
Owner SICHUAN UNIV
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