DE3612770A1

DE3612770A1 - Heat exchanger

Info

Publication number: DE3612770A1
Application number: DE19863612770
Authority: DE
Inventors: Wolfgang Haferkamp; Bernd Jaworek; Elmar Schaefer
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-04-16
Filing date: 1986-04-16
Publication date: 1987-10-22

Abstract

Because, as is generally known, the degree of heat exchange depends not only on the temperature difference and the exchange surface but also on the path of the medium through the pipe, the speed and its thorough mixing, by using tubes with screw-shaped corrugation or twist in heat exchange apparatuses of the most different arrangement this effect can be used to increase the exchange efficiency.

Description

Description of the invention

Die Erfindung betrifft die Verwendung von Rohren mit schrauben förmiger Wellung oder Verwindung für Zwecke des Wärmetausches (Fig. 1).The invention relates to the use of tubes with screw-shaped corrugation or twisting for the purpose of heat exchange ( Fig. 1).

Für Wärmetauscher werden meist Glattrohre oder Rippenrohre ver wendet. Auch ringförmig gewellte Rohre sind schon vorgeschlagen worden. Hier soll der Effekt der Oberflächenvergrößerung genutzt werden. Bei Ringspaltwärmetauschern ist schon der Einsatz von schraubenförmig gewellten Rohren vorgeschlagen worden, um neben der Rohroberflächenvergrößerung den Effekt der Zwangsführung zu nutzen und zu verbessern.Smooth tubes or finned tubes are usually used for heat exchangers turns. Tubular corrugated tubes have also been proposed been. Here the effect of the surface enlargement should be used will. In the case of annular gap heat exchangers, the use of helically corrugated tubes have been proposed to be next to the pipe surface enlargement has the effect of positive guidance use and improve.

Die Erfindung löst die Aufgabe, die Wärmeübertragung vom Medium im Rohrinneren an das die Rohrwand umgebende Medium dadurch zu erhöhen, daß durch die Verwendung von Rohren mit schraubenför miger Wellung (Fig. 1) das Medium im Rohrinneren durch die drall artige Ausbildung der Rohrwände in Rotation (1) versetzt und dadurch der Weg des Mediums durch das Rohr wesentlich verlängert wird. Außerdem entstehen zusätzlich durch die Rotation Verwir belungen im Rohrinneren, durch die das Medium im Rohrinneren während des Durchgangs durch das Rohr vermischt wird. Hierdurch wird erreicht, daß im Gegensatz zum glatt- oder ringförmig ge wellten Rohr auch der innere Teil im Kern des Mediums besser mit der Rohrwand in Berührung kommt und so stärker am Austausch teilnimmt.The invention solves the problem of increasing the heat transfer from the medium inside the pipe to the medium surrounding the pipe wall in that by using pipes with a screw-shaped corrugation ( FIG. 1) the medium inside the pipe by the swirl-like design of the pipe walls in rotation ( 1 ) offset and thereby the path of the medium through the tube is significantly extended. In addition, the rotation creates turbulence in the interior of the tube, through which the medium in the interior of the tube is mixed during passage through the tube. This ensures that, in contrast to the smooth or ring-shaped corrugated tube, the inner part in the core of the medium comes into better contact with the tube wall and thus participates more in the exchange.

Application of the invention, examples

Der Einsatz von Rohren mit schraubenförmiger Wellung oder Ver windung ist vorgesehenThe use of tubes with helical corrugation or Ver winding is provided

a) in the case of heat exchangers consisting of tube bundles ( FIG. 2), registers ( FIG. 3) and coils ( FIG. 4),
b) in heat exchangers with a jacket and fixed or extendable tube bundles or registers with straight or curved tubes ( FIG. 6),
c) in heat exchangers with a jacket and fixed or extendable coils, which are arranged individually or in one another or next to one another and are connected either in series or in series either internally or externally ( FIG. 6),
d) in heat exchangers with a jacket, in which the arrangement according to a) and b) are combined ( FIG. 5),
e) in heat exchange devices without an outer jacket, in which the tube bundle, register or coil are introduced directly into another medium ( FIG. 7),
f) in heat exchangers according to a) to d), using double-walled safety tubes with helical corrugation of both the inner and the outer tube, in which the space is filled with another medium ( 3 ) that probably also participates in the exchange process , whose real task is, by monitoring z. B. changes from Druckver to report leaks in the pipes. As a result, monitored safety heat exchangers can be used e.g. B. with harmful and water-polluting substances and flammable liquids, in which the disadvantage of the reduction of heat transfer through the intermediate medium can be partially compensated for by the use of tubes with helical corrugation ( Fig. 8).

Claims

1. Heat exchanger with tube bundles, registers or tube coils, in which a medium flows positively through the tubes and the second medium flows freely around the tube bundle, register or tube coil, characterized in that for the tube bundle, register and tube coil, tubes with helical corrugation or twist can be used.

2. Heat exchanger according to claim 1, characterized in that Pipe bundle, pipe register or pipe coil with helical Corrugation or twisting combined with those from smooth tubes will.

3. Heat exchanger according to claim 1 and 2, characterized in that the tube bundle, tube register or the tube coil of one Containers are enclosed.

4. Heat exchanger according to claim 1, characterized in that they are freely introduced into a medium flowing around them.

5. Heat exchanger according to claim 1 to 4, characterized in that as a helical corrugated tube, a double jacket safe Corrugated corrugated tube is used, the space with a Medium for leakage monitoring is filled.