Experimental device and method for determining heat exchange efficiency of vapor-liquid-liquid heat exchanger
A technology of heat exchange efficiency and experimental equipment, applied in the direction of measuring equipment, machine/structural component testing, instruments, etc., can solve the problems of insufficient understanding, mistakes, and not many researches on the influence of heat exchange efficiency of heat exchangers, and achieve safety High performance and feasibility, broad application prospects and simple operation
Active Publication Date: 2021-11-09
HARBIN ENG UNIV
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Problems solved by technology
If considered in terms of single-phase, it is bound to cause errors
[0004] So far, the factors affecting the heat transfer efficiency of single-phase heat exchangers such as liquid-liquid and gas-liquid have been well understood, but there are not many studies on gas-liquid-liquid two-phase heat exchangers. Due to the complexity of the experiment, the two The influence of the phase ratio on the heat transfer efficiency of the heat exchanger is even more insufficient
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[0062] The present invention will be further described in detail below with reference to the accompanying drawings.
[0063] The following detailed description will be further illustrated by the following specific embodiments.
[0064] like figure 1 As shown, a vapor-liquid-liquid heat exchange is a schematic diagram of the heat transfer efficiency measuring device, which consists of four parts: (1) power segment (label 1); (2) heating section (label 2 in the figure); 3) Test section (label 3); (4) cooling section (reference numeral 4).
[0065] The main circuit includes pump 1, filter 2, observation port 3, flow surface 4, electric wire heating device 5, blender 6, observation port 7, 8, vapor-liquid-liquid heat transfer, known calibration efficiency Heat 11 (can be a plate, tube, etc.), reservoir 14, throttle valve 15, and the like.
[0066] In the main pipe, the overcold liquid from the tank is pushed out by the pump 1, and the port 3, the flow surface 4, the electric wire heat...
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The invention provides an experimental device and method for determining the heat exchange efficiency of a vapor-liquid-liquid heat exchanger. The experimental device comprises a power section, a heating section, a testing section and a cooling section. The power section comprises a pump, a filter and a liquid storage tank and is used for providing power for a main loop of the whole device and allowing steam of the main loop of the device to flow; the heating section comprises an electric heating wire heating device and a gas-liquid mixer, the heating section is used for heating the supercooled liquid in the main loop to a gas-liquid two-phase state, and the steam dryness of an inlet of the testing section is changed by controlling the heating section; the testing section comprises a vapor-liquid-liquid heat exchanger, the testing section heats or cools the vapor flow in the main loop so as to obtain the heat exchange efficiency of the vapor-liquid-liquid heat exchanger in two different working states, and the cooling section cools the vapor flow from the testing section to a supercooled liquid state; the heat exchange efficiency of the vapor-liquid-liquid two-phase heat exchanger in the heat transfer test is measured, and the influence of different steam dryness in a pipeline and different fluid flow patterns at an inlet and an outlet of the heat exchanger on the vapor-liquid-heat exchange efficiency is verified.
Description
Technical field [0001] The present invention relates to an experimental apparatus and method according to a heat transfer efficiency of a vapor fluid-liquid heat exchange, belonging to the heat exchanger experimental design, and is used to measure the heat transfer efficiency of the two-phase heat exchanger in the heat transfer test. Indirect measurement And real-time control of local steam dryness in the heat exchanger, and inspect different steam dryness and fluid flow type in the pipeline on the heat transfer efficiency of the vapor - liquid - liquid heat exchange, to improve the heat transfer efficiency of the two-phase heat exchanger Vacancies. Background technique [0002] The heat exchanger industry plays an important role in industrial production in global production. It is a sun industry in a booming period. In the world exchanger industry competition, China, Russia, Brazil, India market is a few countries and regions that have grown rapidly in recent years, and the four...
Claims
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IPC IPC(8): G01M99/00
CPCG01M99/002G01M99/005
Inventor 张小彬冯玉祥谷德林吕红庆梁文彦
Owner HARBIN ENG UNIV