Combination method for inhibiting frosting of outdoor low-temperature wall surface
A wall and frosting technology, applied in the direction of damage protection, coating, lighting and heating equipment, etc., can solve the problem of easy frosting on the wall of finned tubes
Active Publication Date: 2017-09-15
BEIJING UNIV OF CHEM TECH +2
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Problems solved by technology
[0021] The purpose of the present invention is to provide a composite method for suppressing frosting on the low-temperature wall, so as to solve the problem that the wall of the finned tube is easy to frost when the air-temperature gasifier is working, so as to improve the heat exchange capacity of the gasifier
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[0040] In order to more clearly illustrate the heat transfer scheme of the optimized gasifier conceived by the present invention, the accompanying drawings are used for further detailed description below; based on the embodiments of the present invention, those of ordinary skill in the art have obtained it without creative work. All other embodiments of all belong to the protection scope of the present invention.
[0041] figure 1 It is the physical picture of condensation beads frosting on two kinds of wall surfaces at low temperature. After the surface of the fins is cleaned, the surface of the fin walls is modified according to the construction process of the hydrophobic coating, and the surface of the fins has hydrophobic properties after the coating is cured. The walls of the vertically placed finned tubes are hydrophobic walls and ordinary walls. When the temperature of the walls drops, water vapor in the air condenses on the walls. On the hydrophobic surface, the diam...
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Abstract
The invention discloses a combination method for inhibiting frosting of an outdoor low-temperature wall surface. The combination method is characterized by combining hydrophobization of the wall surface, change of an inclined angle of the wall surface and arrangement of a solar heat absorbing material to achieve the purpose of inhibiting frosting of the low-temperature wall surface. The combination method achieves reduction or inhibition of the frosting thickness of the low-temperature wall surface without additionally consuming such costed heat energy as electric energy when heat exchange equipment is operated, so that the heat exchange efficiency is improved, and the equipment safety is improved. The method performs ultrahydrophobization on the wall surface easy to frost to delay the time of forming a frost layer on the wall surface and to reduce the condensation thickness of the frost layer on the wall surface according to maximum heat exchange heat resistance of low-temperature equipment and low-temperature frosting characteristic of the wall surface; the inclined angle of the wall surface is increased to shorten the stop time of condensed beads on the wall surface; and such methods as arrangement of the solar heat absorbing material to increase the temperature of the wall surface achieve reduction of the frost thickness on the wall surface or inhibition of the frost layer on the wall surface.
Description
technical field [0001] The invention relates to a composite method for suppressing frosting on the outdoor low-temperature wall surface, in particular to a method for suppressing or reducing the frosting on the wall surface of finned tube fins of a gasifier. Background technique [0002] With the increasing shortage of energy and the vigorous implementation of environmental protection policies, air-heated vaporizers have been widely used in the gasification of liquid ammonia, liquid oxygen, liquid nitrogen, and LNG due to their advantages of cleanliness and low energy consumption. The air-heated vaporizers independently designed and manufactured in my country are still at a relatively low level, lacking independent innovation and optimized design, and are generally manufactured and designed based on existing experience. In reality, due to the low temperature and the influence of material properties, the fins of the vaporizer are prone to frost on the surface, and the heat tr...
Claims
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Login to View More IPC IPC(8): F28F19/02
CPCF28D2021/0064F28F19/006F28F19/02
Inventor 张建文江裕孙艳云常立顺沈凤武罗伟
Owner BEIJING UNIV OF CHEM TECH