SU1513368A1 - Heat exchanging tube - Google Patents

Abstract

The invention relates to heat exchange tubes used in heat exchangers with gas coolant inside the tubes for the power, metallurgical, shipbuilding and other industries. The aim of the invention is to intensify heat exchange and reduce metal consumption. The goal is achieved by the fact that the top 2 and bottom 3 edges with respect to the axis of the pipe 5 are located at an angle of 10-30 ° C, and the side edges 4 are at an angle of 5-13 ° C, the distance between the top 2 and bottom 3 edges is It is 1.5-3 times the diameter of the pipe, and the width of the tape is 0.7-0.9 times its diameter. The tape insert with the specified characteristics provides the maximum energy coefficient K = 1.3. 2 Il.

Description

one

(21) 4293636 / 23-06; (22) 05/03/88 (46) 10/07/89. Bksh. Number 37

(71) Scientific and Production Association for Research and Design of Energy Equipment. I.Polzunova and the All-Union Scientific Research and Design and Design-Design Institute of Aluminum, Magnesium and Electrode Industries

(72) V.K. Migay, P.G. Bystroy, V.I. Sedletsky, V; A; € edletska, G.V.Telnikov, V.M.Averin

and F.V. Hajiyev (53) 621.57 (088.8) (56) Yamada Ya., Akay M., Mori Ya. Intensification of heat exchange in a cross-flow shell-and-tube heat exchanger through the use of radiating walls. - Heat transfer. 1984, t. 106, № 4.

(54) HEAT EXCHANGE PIPE (57) The invention relates to heat exchange pipes used in heat exchangers with gas heat transfer fluid inside pipes for the power, metallurgical, shipbuilding and other industries. The aim of the invention is to intensify heat exchange and reduce metal consumption. The goal is achieved by the fact that the upper 2 and lower 3 ribs with respect to the axis of the pipe 5 are located at an angle of 1О-ЗО, and the lateral edges 4 - at an angle of 5-13, the distance between the upper 2 and lower 3 edges is 1.5 The diameter of the pipe is 3, and the tape width is 0.7-0.9 times the diameter. The ribbon insert with the specified characteristics provides the maximum energy coefficient K 1.3. 2 Il.

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The invention relates to heat exchange tubes used in heat exchangers with gas coolant inside the tubes for power, metallurgy, shipbuilding, chemical, and other types of pipes.

The purpose of the invention is to intensify heat exchange and reduce metal consumption.

FIG. 1 shows a tape intensifier, a general view of FIG. 2 - a test-tube with a ribbon holder located in it.

The convective-radiation tape (band) intensifier 1 is a flat tape (strip), curved along its entire length, having upper 2, lower 3 and lateral 4 edges.

The top 2 and bottom 3 edges are located with respect to the longitudinal axis of the pipe 5 at an angle of / 5 equal to 10

thirty ; and the side ribs 4 are with the pipe axis an angle oi equal to 5-13, and the distance p between the upper and lower ribs is 1.5-3 times the diameter of the pipe d into which the intensifier is placed, and its width is 0.7 -0.9 pipe diameter.

The choice of the optimal design of the intensifier was determined by the value of the energy coefficient

K - - 6i

where about and 0 are, respectively, heat transfer coefficients in a pipe with an insert and in a smooth pipe at equal power costs with a smooth pipe for the advancement of the heat carrier.

For heat exchanger tubes with intensifiktf, optimum results are ensured by band (strip)

Intensively, the plane of the tape of which is curved along the entire length in such a way that the upper and lower edges with respect to the pipe axis are angled | - 10-ZO, and the side edges with respect to the pipe axis make an angle oi 5-13, with this, the distance between the upper and lower edges is 1.5-3 times the diameter of the pipe, and the width of the tape is 0.7-0, 9 diameter pipe.

The tape insert with the above characteristics provides the maximum energy coefficient K „1.3, taking into account only the convective component. The radiant constituent is an additive that significantly intensifies the heat exchanger. The insert is the more effective, the greater the level of temperature and temperature pressure. It is much simpler to manufacture the auger, since it is made from a thin sheet, while the auger from a thin sheet cannot be cjotent - the material tears and deforms.

F. formula of invention

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Heat transfer pipe with located-; a convective-radiation belt intensifier inside it, characterized in that, in order to intensify heat exchange and reduce metal consumption, the plane of the belt is curved along the length so that the upper and lower edges are in relation to the chi of the tube at an angle of 10 ° 30, and the side edges at an angle of 5-13, wherein the distance between the upper and lower edge is 1.5-3 times the diameter of the pipe, and the width of the tape is 0.7-0.9 times its diameter.

Editor V.Danko

Compiled by N. Alekseev

Tehred L. Oliynyk M. Sharoshi Corrector

Order 6072/44

Circulation 570

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101

FIG. 2

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Claims (1)

F. op mula inventions Heat exchange pipe with located; convection-radiation tape intensifier inside it, characterized in that, in order to intensify heat transfer and reduce metal consumption, the plane of the tape is curved along the length so that the upper and lower ribs with respect to the pipe axis are at an angle of 10-30 °, and the side ribs at an angle of 5–13 °, the distance between the upper and lower ribs is 1.5–3 di> pipe diameter, and the tape width is 0.7–0.9 of its diameter.