Rotational flow evaporating heat exchanger
A technology of evaporative heat exchanger and helical wire, which is applied in the field of coil-type swirl evaporative heat exchanger, can solve the problems of rising air humidity and decreasing evaporation efficiency, and achieve improved heat transfer effect, weakened wall attachment effect, and improved evaporation efficiency effect
Inactive Publication Date: 2009-08-05
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology
Therefore, regardless of the form of continuous or intermittent replenishment, within the replenishment period, objectively, the humidity of the ambient air near the water film on the metal surface will rise or even be in a saturated state, resulting in a significant decrease in evaporation efficiency.
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[0012] The present invention will be further described below in conjunction with the accompanying drawings.
[0013] Such as figure 1 As shown, the swirling flow evaporation heat exchanger of the present invention is made of metal tubes with good thermal conductivity, such as copper tubes, stainless steel tubes, etc., and the metal tubes are coiled to form a disk-like body, and the disk-shaped body is preferably made of Coiled in a helical progression. Different from the flow phenomenon in ordinary tubes, in the swirling flow evaporation heat exchanger of the present invention, the fluid flows along the tangential direction of the helix, which can weaken the Coanda effect of the fluid and improve the heat exchange effect. For any pipe section, the cross-sectional flow velocity of the fluid in the pipe is always uneven. This uneven cross-sectional flow velocity can effectively disturb the wall attachment layer of the fluid in the pipe, further reduce the thermal resistance dur...
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The invention discloses a coil type swirling evaporation heat exchanger which can cool liquid in a pipe by the evaporation process of water on the surface of metal and has the characteristic of favorable heat exchanging effect. The heat exchanger is made of metal pipes with high heat conductivity, and the metal pipes are coiled in a progressive mode of a spiral line to form a disk-shaped body which is approximate to a disk. The structure improves the flowing characteristic of liquid in a pipe, can weaken the wall attaching effect of the liquid so as to improve the heat exchanging effect. Meanwhile, the heat exchanger is matched with an evaporation water replenishing device periodically replenishing water so that a water replenishment process of a water film in any position of the surface of metal can be instantly carried out, thus the evaporation efficiency of the heat exchanger is effectively improved. The heat exchanger can be widely used for various occasions that liquid in a pipe is cooled by the evaporation process of water on the surface of metal.
Description
technical field [0001] The invention relates to a cooling device heat exchanger, in particular to a coil type swirl evaporation heat exchanger which realizes fluid cooling in a tube through the metal surface moisture evaporation process. Background technique [0002] The process of using the water film evaporation on the metal surface to absorb the latent heat of vaporization is one of the common heat exchange methods in the field of thermal engineering. Since this process achieves the purpose of "heat exchange" through the "mass exchange" between water and air, the water consumption of the water film is also inevitable. To maintain the continuation of the evaporation process, the metal surface must be replenished with water in a timely manner. The most common means of replenishment is by means of (continuous or intermittent) water spray or mist. In view of the mechanism of the surface evaporation process, the efficiency of evaporation mainly depends on the relative humidi...
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IPC IPC(8): F28D5/02F28F21/08F28F13/06
Inventor 钟星灿何叶从曾臻曹树勇叶冲
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD