Heat transferring tube for downward flow fluid membrane distiller

A heat transfer tube and liquid film technology, applied in vertical tube evaporators, evaporation, tubular elements, etc., can solve the problem of heat transfer performance reduction of heat transfer tubes

Inactive Publication Date: 2003-01-15
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these areas, the heat transfer performance of the heat transfer tube is reduced due to the inability to exchange heat between the refrigerant and the water in the tube.

Method used

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  • Heat transferring tube for downward flow fluid membrane distiller
  • Heat transferring tube for downward flow fluid membrane distiller
  • Heat transferring tube for downward flow fluid membrane distiller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Next, the effects of the embodiments of the present invention will be specifically described in comparison with comparative examples outside the scope of the claims. First, a test method common to each of the following test examples will be described. First, a method of measuring the overall heat transfer coefficient of the heat transfer tube as the heat transfer performance of the heat transfer tube will be described. Figure 4 It is a schematic diagram showing the configuration of the test apparatus used in the heat transfer tube performance evaluation tests of Examples and Comparative Examples of the present invention.

[0056] Such as Figure 4 As shown, a chamber 14 is provided in this test device, and the interior of the chamber 14 is divided into two chambers of an evaporator 14 a and an absorber 14 b by a partition wall 15 . In addition, steam may flow through the upper portion of the partition wall 15 . In the evaporator 14a, six heat transfer tubes 16 are v...

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Abstract

The present invention provides a heat transfer tube for a falling film type evaporator, in which water spreading characteristics, particularly the water spreading characteristics in the tube axis direction, enhancing the heat transfer ability. Three types of projections 2, 3, and 4 are formed on an external surface 1a of a heat transfer tube body 1. A respective plurality of projections 2 to 4 are arranged spirally in parallel to one another, forming projection groups 2a to 4a. The number of each projection group 2 to 4 is one. Pitches P2 to P4 for the projections 2 to 4 are in the range of 0.35 mm<=P4 F28F 1/42 9 17 0 2002/6/12 1391080 2003/1/15 1228603 2005/11/23 2005/11/23 2005/11/23 Kobe Steel Ltd. Japan Ota Yoshio Saiki Chikara Takahashi Hiroyuki wang huimin 11021 The Patent Agency of the Chinese Academy of Sciences Inside the Chinese Academy of Sciences, No.52 Sanlihe Road, Fuwai, Beijing 100864 Japan 2001/6/12 2001-177516

Description

technical field [0001] The present invention relates to a downwardly flowing liquid that exchanges heat with the fluid flowing through the pipe by allowing the refrigerant to flow downward to the outer surface of the pipe, forming a liquid film on the outer surface of the pipe, evaporating the refrigerant, and exchanging heat with the fluid flowing through the pipe Heat transfer tubes for film evaporators. Background technique [0002] The absorption low-temperature water machine is a refrigeration cycle system, equipped with: an absorber for absorbing the vapor of a refrigerant (such as water) in an absorption liquid (such as an aqueous solution of lithium bromide); a regenerator for extracting the vapor of the above-mentioned refrigerant from the above-mentioned absorption liquid; The condenser for extracting the above-mentioned refrigerant and the evaporator for evaporating the condensed refrigerant and exchanging heat. The feature of the absorption low-temperature water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/06B21D17/04F28F1/42
CPCF28F1/422F28F1/42B01D1/065
Inventor 多田义男佐伯主税高桥宏行
Owner KOBE STEEL LTD
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