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An Experimental Device for Measuring the Boiling Heat Transfer Coefficient of Flow in Refrigerant Tubes

A technology of boiling heat exchange and experimental equipment, applied in the direction of material thermal conductivity, material thermal development, etc., can solve the problems of increasing uncontrollable factors, increasing difficulty of measurement and control, and complicated experimental equipment, and achieves the effect of easy control

Inactive Publication Date: 2016-09-14
SOUTHEAST UNIV
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  • Description
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  • Application Information

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Problems solved by technology

If only to study the boiling heat transfer coefficient of the refrigerant flow in the evaporator and build a complete set of experimental transposition of the refrigeration cycle system, not only the experimental equipment is complicated, but also the uncontrollable factors will increase, and the difficulty of measurement and control will increase.

Method used

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  • An Experimental Device for Measuring the Boiling Heat Transfer Coefficient of Flow in Refrigerant Tubes

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Embodiment Construction

[0016] The present invention will be further explained below in conjunction with the embodiments and the accompanying drawings. The following examples do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation are within the protection scope of the present invention.

[0017] An experimental device for measuring the boiling heat transfer coefficient of refrigerant tube flow, such as figure 1 As shown, the device is composed of a refrigerant cycle ①, a hot water cycle ②, and a cooling water cycle ③.

[0018] The refrigerant cycle ① includes a condenser 1, a downcomer 2, a refrigerant flow regulating valve 3, a one-way valve 4, a refrigerant preheater 5, a first sight glass 14, a shut-off valve 18, a single-pipe evaporator 6, The shut-off valve 19, the second mirror 15, the rising pipe 7, and the third mirror 16 are connected in the following way: the liquid outlet a of the shell side of t...

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Abstract

The invention discloses an experimental device for measuring a pipe flow boiling heat transfer coefficient of a refrigerant. The device is composed of refrigerant circulation, hot water circulation and cooling water circulation, wherein liquid flow is realized by using a conventional circulating pump according to the cooling water circulation and the hot water circulation; according to the refrigerant circulation, the refrigerant is vaporized through heating by virtue of the height difference between a condenser and a single-sleeve-type evaporator, and refrigerant vapor transpires from one side to the condenser, is condensed in the condenser and then flows down under the action of gravity to form natural circulation flow. The pipe flow boiling heat transfer process of the refrigerant can be simulated, and an experiment way is provided for research on the pipe flow boiling heat transfer coefficient of the refrigerant under different working conditions. By virtue of reasonable layout, the state parameters of the refrigerant entering the evaporator can be simulated; meanwhile, according to the device, a compressor and a shielding pump are not adopted as refrigerating circulation power devices, and the flow heat exchange process of the refrigerant in the evaporator is more easily controlled.

Description

technical field [0001] The invention relates to a novel experimental device for simulating the working condition of refrigerant flowing and boiling in a horizontal tube, which can accurately measure the heat transfer coefficient of the refrigerant flowing and boiling in the tube. Background technique [0002] In order to study the flow boiling heat transfer coefficient in the refrigerant tube, it is necessary to simulate the boiling process of the refrigerant flow in the evaporator in the actual refrigeration system. Usually, a compressor or a canned pump is used to provide circulation power for the refrigerant flowing in the system. If a complete set of experimental transposition of the refrigeration cycle system is built just to study the boiling heat transfer coefficient of refrigerant flow in the evaporator, not only the experimental equipment is complicated, but also the uncontrollable factors will increase, and the difficulty of measurement and control will increase. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20G01N25/18
Inventor 杜垲储云霄李彦军李舒宏
Owner SOUTHEAST UNIV
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