Efficient shell and tube type condenser

Abstract

The invention discloses an efficient shell and tube typed condenser, including a heat transfer tube bundle and a shell. The condenser is characterized in that the heat transfer tube bundle is composed of two or even more heat transfer tubes; the heat transfer tube bundle is matched with corresponding heat transfer tubes according to three different heat exchange course, namely, gas superheating, gas condensing, and liquid overcooling. The condenser of the invention has the beneficial effects as follows: the optimal heat transfer tubes are correspondingly adopted for the condenser according to the different heat transfer course and the characteristics of the gas superheating tube bundle, a gas condensing upper layer tube bundle, a condensing lower layer tube bundle and an overcooling tube bundle. Compared with the traditional condenser which adopts the same heat transfer tube to optimize the heat exchange of the condensing upper bundle, the shell and tube typed condenser of the invention effectively improves the heat exchange effect of the condenser.

Description

technical field [0001] The invention relates to a condenser, in particular to a shell-and-tube condenser, which has a relatively high heat transfer coefficient and belongs to the technical field of heat transfer equipment. Background technique [0002] In refrigeration and air conditioning and related industries, water-cooled condensers have been widely used. Most of them are shell and tube heat exchangers. In the condenser, there are mainly three heat exchange processes, including: [0003] 1) cooling of superheated gas (desuperheating); [0004] 2) The gas condenses into a liquid; [0005] 3) The liquid is further cooled to a supercooled state. [0006] Among them, 1) and 3) are sensible heat exchange processes without gas-liquid state changes, and 2) are latent heat heat exchange processes with state changes. Although the heat transfer of these processes is very different, at present, in the condenser, a unified condensing heat exchange tube is used. And this kind of...

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Problems solved by technology

However, when the number of tube rows in the condenser increases significantly, the heat transfer tubes located in the lower area have a larger amount of condensate dripping on the surface, and the new heat transfer tubes are prone to deposit on the surface due to the surface tension of the three-dimensional surface. Reduce heat transfer efficiency, so the larger the number of heat transfer tubes, the greater the heat transfer attenuation

In this way, the heat exchange of the heat exchange tubes in the lower area is poor

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