CN103791741B

CN103791741B - A kind of phase transformation plate type heat exchanger

Info

Publication number: CN103791741B
Application number: CN201410023620.7A
Authority: CN
Inventors: 吴俐俊; 鞠贵冬; 王文平
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2014-01-20
Filing date: 2014-01-20
Publication date: 2016-08-17
Anticipated expiration: 2034-01-20
Also published as: CN103791741A

Abstract

The present invention relates to a kind of phase transformation plate type heat exchanger, it includes heat exchanger core body, heat transferring medium import, heat transferring medium outlet, phase change medium import header, phase change medium outlet header.Described corrugated plating heat exchange core body is stacked together by organizing the dislocation of plate bundle more.Plate bundle is added together by two pieces of identical plate stacks, utilizes laser penetration to weld, and forms prominent wealthy and collapsed shape by pressurising and cross section is the oval or oblate phase change medium circulation canal of class, and the dislocation of adjacent panels interfascicular stacks another heat transfer medium channels of formation.Circulation canal is arranged from more to less, and along with phase change medium condenses, volume greatly reduces, and medium enters from multichannel, and few passage goes out；If phase change medium evaporates, volume is significantly increased, and medium just enters from few passage, and manifold is said.Overcome the condensation of diabatic process medium and become, from gaseous state, problem that liquid causes volume minimizing that flow velocity can be made to decline because of phase transformation and medium evaporated volume is significantly increased, in the problem that pressure increases makes plate, pressure is average, structure is the most reasonable, this phase transformation plate type heat exchanger is easily assembled to adjust, compact conformation degree is higher, heat transfer effect is strong, and high temperature high voltage resistant, flow resistance is low.

Description

A kind of phase transformation plate type heat exchanger

Technical field

The invention belongs to high efficient heat exchanging energy-saving equipment field, relate to a kind of phase transformation plate type heat exchanger.

Background technology

Phase-change heat-exchanger is frequently with fin-tube heat exchanger at present.In wherein phase change medium walks pipe, another medium walks fin side, uses cross-flow heat exchange between phase change medium and another medium, but this fin-tube heat exchanger heat transfer effect is bad, cause in pipe medium can not phase transformation completely, waste substantial amounts of energy；On the other hand fin-tube heat exchanger exchange capability of heat is poor, need to consume substantial amounts of tubing, floor space is big, and processing cost is higher, mechanical seal is poor, the easy dust stratification in fin side, and fin easily comes off and causes thermal contact resistance to increase simultaneously, causing heat exchanger exchange capability of heat to be greatly lowered, service life reduces.

In prior art, less to the report of phase transformation plate type heat exchanger, and plate type heat exchanger has compact conformation, floor space is little, heat transfer efficiency high, although but Conventional plate-type heat exchanger compact conformation, but runner is complicated, medium both sides flow resistance is the biggest, Conventional plate-type heat exchanger needs seal with elastometic washer simultaneously, it is not suitable for high-temperature steam heat exchange, steam generation phase transformation simultaneously can cause volume to be greatly reduced, and Conventional plate-type is not changed on cross section of fluid channel is long-pending, after causing phase transformation, rate of flow of fluid does not reaches turbulent flow, heat transfer effect reduces, so needing to develop phase transformation plate type heat exchanger.

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art, a kind of phase transformation plate type heat exchanger is provided, this phase transformation plate type heat exchanger have employed the design philosophy being different from traditional heat exchangers, shell-and-tube, plate-fin and the advantage of several heat exchangers such as board-like are merged, there is compact conformation, exchange capability of heat is strong, and flow resistance is little, the feature of easy cleaning.Which overcome conventional phase-change heat-exchanger exchange capability of heat poor, consumptive material is many, cost is high, seal poor and that flow resistance is big shortcoming, use the way that runner reduces successively simultaneously, make phase change medium cross section of fluid channel in phase transition process long-pending more and more less, add the turbulivity of phase change medium, make heat transfer effect be greatly enhanced.

The technical solution adopted in the present invention is:

A kind of phase transformation plate type heat exchanger, including heat exchanger core body 1, heat transferring medium import 2, heat transferring medium outlet 5, phase change medium import header 3 and phase change medium outlet header 4；Described heat exchanger core body 1 side arranges phase change medium import header 3 and phase change medium outlet header 4；Described heat exchanger core body 1 upper and lower side is respectively provided with heat transferring medium import 2 and heat transferring medium outlet 5, constitutes a kind of heat transfer fluid passages；Described heat exchanger core body 1 is vertically stacked by some groups of plate bundles 12 and forms, described plate bundle 12 is superimposed by two pieces of identical plates 9, laser penetration is utilized to weld, it is the oval or oblate phase change medium circulation canal 10 of class by pressurising Formation cross-section, between adjacent plate bundle 12, uses dislocation to stack the another kind of heat transfer medium channels 11 of formation；Described phase change medium circulation canal 10 is arranged the most from more to less, and along with phase change medium condenses, volume greatly reduces, and phase change medium enters from multichannel, and few passage goes out；If phase change medium evaporates, volume is significantly increased, and phase change medium just enters from few passage, and manifold is said.

In the present invention, described plate bundle 12 1 upper lateral part is provided with phase change medium import 6 and bottom is provided with phase change medium outlet 7.

Described plate all uses steel or other metal materials to make.

The beneficial effects of the present invention is:

1) phase change medium passage uses class circulation canal oval, oblate, and the horizontal class outer surface oval, oblate of plunderring of heat exchanging fluid makes heat exchanging fluid preferably to contact by outer surface oval with class, oblate, eliminates heat exchanging corner；2) have employed prominent wealthy and collapsed shape in phase change medium passage, make phase change medium constantly change the flow direction and speed, add disturbance, enhance heat transfer；3) class used circulation canal number oval, oblate is distributed from more to less, solving the condensation of diabatic process medium and become, from gaseous state, problem that liquid causes volume minimizing that flow velocity can be made to decline because of phase transformation and medium evaporated volume is significantly increased, in the problem of pressure increase makes plate, pressure is average.This structure is equivalent to passage reducing, and structure is the most reasonable, thus enhances heat exchange；4) operating pressure is high, pressure 5Mpa, and operating temperature is high, heatproof 30 DEG C 1000 DEG C；5) module design, installs, changes, cleans and easy to maintenance.

Accompanying drawing explanation

Fig. 1 is phase transformation board-like heat exchanger structure figure.

Fig. 2 is present invention heat exchanger sheet structure generalized section.

Fig. 3 is plate area of beam of the present invention schematic diagram.

In accompanying drawing, the assembly representated by each label is as follows:

1 heat exchanger core body, 2. heat transferring medium import, 3. phase change medium import header, 4. phase change medium outlet header, 5. heat transferring medium outlet, 6. phase change medium import, 7. phase change medium outlet, 8. weld line, 9. plate, 10. phase change medium circulation canal, 11. heat transfer medium channels, 12. plate bundles.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described in detail.

With reference to Fig. 1, a kind of phase transformation plate type heat exchanger includes heat exchanger core body 1, heat transferring medium import 2, heat transferring medium outlet 5, phase change medium import header 3 and phase change medium outlet header 4.

With reference to Fig. 2-3, plate bundle 12 is welded and fixed by the sealing wire of the sealing wire 8 in the middle part of some plates 9 and surrounding by two pieces of relative plates 9, and the sealing wire 8 in the middle part of its middle plateform is parallel with the right and left of plate 9, and its length is less than the flat board left and right length of side.On flat board, the region between sealing wire forms, by gases at high pressure or highly pressurised liquid pressurising, the phase change medium circulation canal 10 that class is oval, oblate, phase change medium import 6 has multiple class passage oval, oblate, along with phase change medium phase-change heat-exchange, circulation canal is also arranged accordingly from more to less, last working medium passage oval from one or more classes, oblate flows out, another kind of heat-transfer fluid flows through the plate interfascicular wavy channel that dislocation stacks, and it is the most reasonable to design.

The operation principle of patent of the present invention is:

Plurality of plates bundle 12 dislocation is stacked together, uses all welded type to seal, form the board-like heat exchanger core body of phase transformation.During work, cooling medium flows through class phase change medium circulation canal 10 oval, oblate, it is another kind of that heat transfer fluid medium is horizontal plunders class outer surface oval, oblate, two kinds of fluids are conducted heat by plate, circulation canal is arranged from more to less, and along with phase change medium condenses, volume greatly reduces, medium enters from multichannel, and few passage goes out；If phase change medium evaporates, volume is significantly increased, and medium just enters from few passage, and manifold is said.Overcome the condensation of diabatic process medium and become, from gaseous state, problem that liquid causes volume minimizing that flow velocity can be made to decline because of phase transformation and medium evaporated volume is significantly increased, in the problem that pressure increases makes plate, pressure is average, structure is the most reasonable, simultaneously because phase change medium passage uses prominent wealthy and collapsed shape, cooling medium is made constantly to change the flow direction and speed, add disturbance so that heat transfer effect is more preferably.

The above is one phase transformation plate type heat exchanger of the present invention, and within all spirit in patent of the present invention and principle, any amendment, equivalent and the improvement etc. made, within should be included in the protection domain of patent of the present invention.

Claims

1. a phase transformation plate type heat exchanger, including heat exchanger core body (1), heat transferring medium import (2), heat transferring medium outlet (5), phase change medium import header (3) and phase change medium outlet header (4)；It is characterized in that described heat exchanger core body (1) side arranges phase change medium import header (3) and phase change medium outlet header (4)；Described heat exchanger core body (1) upper and lower side is respectively provided with heat transferring medium import (2) and heat transferring medium outlet (5), constitutes a kind of heat transfer fluid passages；Described heat exchanger core body (1) is vertically stacked by some groups of plate bundles (12) and forms, described plate bundle (12) is superimposed by two pieces of identical plates (9), two pieces of Opposite blade (9) are welded and fixed by sealing wire (8) and surrounding sealing wire in the middle of some plates, laser penetration is utilized to weld, it is the oval or oblate phase change medium circulation canal (10) of class by pressurising Formation cross-section, between adjacent plate bundle (12), uses dislocation to stack the another kind of heat transfer medium channels (11) of formation；Described phase change medium circulation canal (10) is arranged the most from more to less, and along with phase change medium condenses, volume greatly reduces, and phase change medium enters from multichannel, and few passage goes out；If phase change medium evaporates, volume is significantly increased, and phase change medium just enters from few passage, and manifold is said.

Phase transformation plate type heat exchanger the most according to claim 1, it is characterised in that described plate bundle (12) upper lateral part is provided with phase change medium import (6) and bottom is provided with phase change medium outlet (7).