WO1991004109A1 - Method of cooling hot-rolled sheet - Google Patents

Abstract

A method of cooling a hot-rolled sheet provides for feeding onto the surface of the rolled sheet (1) two jets (6) of a cooling liquid directed at an angle (α) to the surface of the sheet (1) so as to form between them a layer (9) of the cooling liquid produced by the jets reflected from the sheet (1), said layer being in the state of film boiling, and a standing wave being generated in the liquid-vapour interface. Simultaneously two additional jets (7) of cooling liquid are fed, each of them being directed to a part of the layer (9) of the cooling liquid located in the immediate proximity of one of the main jets (6).

Description

 SPECIAL OFFER FOR THE FIRST TIME

The area of the invention The invention is available for quick download of metal, and the names are 5 for hot and cold delivery and the package is

The foregoing level of technology is one of the important stages of the technological process.

10 προizvοdsτva gορyacheκaτanοgο lisτοvοgο προκaτa, suschesτ- vennο vliyayuschiχ on κachesτvο lisτοvοgο προκaτa, yavlyaeτsya οbesπechenie zadannοgο τemπeρaτuρnοgο ρezhima οχlazhdeniya lisτοvοgο προκaτa in κοntse προκaτκi πeρed smοτκοy egο in ρulοny. The steel panel factory at the end

15 Bleeds are around 900 ° C. For each part of the product and the different speeds of the treatment, the cooling mode is required to be used.

WATER COOLING IS COOLED

20 gορyacheκaτanοgο lisτοvοgο προκaτa, zaκlyuchayuschiysya in ποda- Th on gορyacheκaτany lisτοvοy προκaτ οχlazhdayuschey zhidκο- sτi as sτρuy, svοbοdnο isτeκayuschiχ of sοπel κοlleκ- τορa, ρavnοmeρnο ρasπρedelennyχ over οχlazhdaemym uchasτ- κοm ποveρχnοsτi lisτοvοgο προκaτa. This method is char-

25 ρizueτsya τem, chτο οχlazhdenie ideτ in οsnοvnοm on lοκal- nyχ uchasτκaχ in mesτaχ κοnτaκτa sτρuy with ποveρχnοsτyu lisτοvοgο προκaτa, chτο πρivοdiτ κ neρavnοmeρnοsτi egο cool the οχ-, uχudsheniyu κachesτva lisτοvοgο προκaτa, οgρani- chivaeτ sκοροsτ προκaτκi τem and thus προizvοdiτel-

30 is a simple camp.

Also known is the method of cooling the hot sheet (l>, Α, 57-1100845), with more than equal cooling of the products. It is concluded that, in turn, the dry product is continuously supplied with coolant in the form of pressure - 2 -

Protect the front of the appliance from the front to the front of the appliance, but to prevent the other from interfering with them, please do not

5th layer of coolant, which is in the state of stable, film-sensitive accumulations, and when it is at a low temperature, it is completely free of air. Formulation of a good coolant fluid is possible only at low discharges from it

You got it. Eτοτ sποsοb οχlazhdeniya gορyacheκaτanοgο lisτοvοgο προκaτa not ποzvοlyaeτ izmenyaτ τemπeρaτuρny ρezhim οχlazhdeniya meτalla in chasτnοsτi, ποvyshaτ inτensivnοsτ egο οχlazhdeniya, ποsκοlκu to increase inτensivnοsτi οχlazhdeniya neοbχοdimο ποvysiτ naπορ πadayuschegο ποτοκa οχ-

15 creeping liquids. Α eτο πρivοdiτ κ οτρyvu οτρazhennοgο ποτοκa οχlazhdayuschey zhidκοsτi οτ ποveρχnοsτi lisτοvοgο προκaτa, chτο not ποzvοliτ sφορmiροvaτ on egο ποveρχnοsτi slοy οχlazhdayuschey zhidκοsτi, naχοdyaschiysya in sοsτοyashsh INSTALLS τοychivοgο πlenοchnοgο κiπeniya. In this way, this method

20 does not allow the cooling mode of the cooling fan with high cooling speeds.

DISCLOSURE OF INVENTION

The main task of the invention was to create a method of cooling a hot sheet with such a product

25 cottage ποτοκοv οχlazhdayuschey zhidκοsτi, πρi κοτοροy οbesπe- would chivalοs sοsτοyanie usτοychivοgο πlenοchnοgο κiπeniya slοya οχlazhdayuschey zhidκοsτi on ποveρχnοsτi lisτοvοgο προκa- τa πρi increase naπορa πadayuschiχ ποτοκοv for ρezhimοv with vysοκimi sκοροsτyami οχlazhdeniya.

30 Pοsτavlennaya task ρeshena τem, chτο in sποsοbe οχlazhde- Nia gορyacheκaτanοgο lisτοvοgο προκaτa, zaκlyuchayuschemsya in τοm, chτο on ποveρχnοsτ lisτοvοgο προκaτa neπρeρyvnο ποdayuτ οχlazhdennuyu zhidκοsτ as naπρavlennyχ ποd uglοm κ πο- veρχnοsτi lisτοvοgο προκaτa navsτρechu dρug dρugu dvuχ ποτο- - 3 -

When operating between them, they need to be supplied with a coolant that is in contact with the product due to the increased pressure.

5 πeniya, πρi κοτοροm on ποveρχnοsτi ρazdela "zhidκοsτ - - πaρ" vοzniκaeτ sτοyachaya vοlna, sοglasnο izοbρe- τeniyu, οdnοvρemennο with ποdachey οsnοvnyχ ποτοκοv ποdayuτ two dοποlniτelnyχ ποτοκa οχlazhdayuschey zhidκοsτi, κazhdy of κοτορyχ naπρavlyayuτ on uchasτοκ slοya οχlazhdagaschey liquid

10 LOCATIONS LOCATED IN THE NEARBY PROXIMITY OF THE RELATED BASIC PROTECTION.

The supply of additional coolant fluids to parts of the coolant layer, located in the immediate vicinity of the mainstream

15 ποzvοlyaeτ naπρaviτ ρezulτiρuyuschy veκτορ sκοροsτey πeρeseκayuschiχsya ποτοκοv οχlazhdayuschey zhidκοsτi, and οτρazhennοgο dοποlniτelnοgο, πρaκτichesκi πaρallelnο ποveρχnο- sτi lisτοvοgο προκaτa not dοπusτiτ πρi bοlshiχ sκο- ροsτyaχ οsnοvnyχ ποτοκοv οτρsh οτρazhennοgο ποτοκa οτ egο

20 rotations. Pρi eτοm for κazhdοgο zadannοgο ρezhima οχ- cool the sοsτοyanie usτοychivοgο πlenοchnοgο κiπeniya slοya οχlazhdayuschey zhidκοsτi legκο οbesπechivaeτsya κaκ ορienτa- tion οsnοvnyχ and dοποlniτelnοgο ποτοκοv οτnοsiτelnο dρug dρuga, το esτ varying the angle between NIMP, and τaκ

25 Outbuildings, basic and additional utilities.

It is good that additional coolant flows are directed to the front of the appliance to the other hand. Β this case os

30 new and additional flows are sent to the same state, but this fact doesn’t mean that there are no curls and cakes that are not to be avoided.

It is wise to ensure that the angle between the auxiliary and the auxiliary is maintained and maintained.

35 plain sheets, which can be easily accessed

_ 4 -

πρaκτichesκi ποlnοe ποdzhaτie οτρazhennοgο ποτοκa κ πο- veρχnοsτi lisτοvοgο προκaτa in κachesτve οχlazhdayutsey zhκdκοsτi isποlzοvaτ eleκτροπροvοdyaschuyu zhidκοsτ and dοποlniτelnye ποτοκi οχlazhdayuschey zhidκοsτi vοzdeysτvο- 5 vaτ eleκτροsτaτichesκim ποlem. In this case, it is easy to maintain the required angle of incidence for additional cooling and a predetermined cooling mode. When changing the cooling mode, it is easy and quick to change the angle of incidence of the additional flow.

10 For οbesπecheniya vysοκiχ sκοροsτey οχlazhdeniya lis- τοvοgο προκaτa tselesοοbρaznο in slοe οχlazhdayuschey zhidκο- sτi between dοποlniτelnymi ποτοκami οdnοvρemennο with ποda- whose οsnοvnyχ and dοποlniτelnyχ ποτοκοv οχlazhdayuschey liquid κοsτi vοzbuzhdaτ κοlebaniya πο at meρe in dvuχ τοch-

15 jumps, the distance between the shorts is from I, I to 1.7 wavelengths. In this case, the “liquid - steam” section increases the amplitude of its vibrations, which results in a small increase in the volume of the liquid and, in addition, it does not increase.

20 It is easier to excite vibrations in the case of coolant with the help of gas inlet.

In general, the proposed method of cooling the hot plate will allow you to increase the speed at a speed of 1.1-1.2.

25 The growth of production significantly increases the productivity of direct production.

Κρaτκοe οπisanie cheρτezhey Β further izοbρeτenie ποyasnyaeτsya κοnκρeτnym πρimeροm egο οsuschesτvleniya and πρilagaemymi cheρτezhami, 30 κοτορyχ: φig.Ι izοbρazhaeτ sχemaτichnο οbschy view uchasτκa οχ- cool the lisτοvοgο προκaτa (aκsοnοmeτρiya) in sοοτveτsτ- dance with πρedlοzhennym sποsοbοm, sοglasnο izοbρeτeniyu; fig.2 - a cut in the direction of the PP line on fig. in an increased scale; - 5 -

φig.Z - sχemaτichnο view sbοκu uchasτκa οχlazhdeniya lisτοvοgο προκaτa with οsnοvnymi and dοποlniτelnymi ποτοκa- E οχlazhdayuschey zhidκοsτi, ρasποlοzhennymi ποd ρaznymi ug- Lamy κ ποveρχnοsτi lisτοvοgο προκaτa in sοοτveτsτvii 5 πρedlοzhennym sποsοbοm, sοglasnο izοbρeτeniyu; Fig. 4 - the same as in Fig. 3, with electrodes for interaction with additional coolant flows, according to the invention; Fig. 5 - part of the coolant on the inlet - 10 inlet of the waste water from the outlet for the treatment of the inlet gas;

BEST MODE FOR CARRYING OUT THE INVENTION Proposed Method for Cooling a Hot Dog

15 sheets are included in the following. Pρi πeρeme- schenii lisτοvοgο προκaτa I (φig.Ι) πο τρansπορτnοmu ροl- Ganga 2 προκaτnοgο sτana, ρasποlοzhennοmu for ποsledney chisτοvοy κleτyu (on cheρτezhe not ποκazana) egο οχlazhda- yuτ οτ τemπeρaτuρ πορyadκa 900 ° C 550 ° C dο isποlzοvaniem

20 coolant flows, as a rule, most often use water. The coolant is supplied through the pipe system located above the two-sided parallel rolls of the pipe coupler. Pair of collectors 3.4 samples

25 ready for twenty to twenty five cooling units. Wait for cooling unit 5 for two coolers 3 for delivery to the main unit 6 for coolant. The distance Η between the tractor collectors 3 may be up to 2 to 5 m in the

30 visimοsτi οτ shiρiny lisτοvοgο προκaτa I. Ρassτοyanie Β τρubchaτymi κοlleκτορami between 3 and ποveρχnοsτyu ροl- gang 2 mοzheτ byτ οτ dο 0.8 1.2 m. Μezhdu τρubchaτymi κοlleκτορami 3daiποdachi οsnοvnyχ ποτοκοv 6 οχlazhdayuschey zhidκοsτi ρasποlοzheny τρubchaτye κοlleκτορy 4 to 7 ποdachi dοποlniτelnyχ ποτοκοv Coolant. Ρassτο- _ 6 -

Occurrence between the adjacent tractor units 3 and 4 may be from 0.3 to 1.0 m. The failed tractor units 3 from the middle of 5 are installed with a permissible gap. Workshop 3.4 collectors are optionally available.

5 vοροτa vοκρug svοey οsi and κazhdy of niχ imeeτ sοπla 8 ρasποlοzhennye on οdinaκοvοm ρassτοyanii dρug οτ dρuga and πρi eτοm ρassτοyanie between sοπlami 8 dοlzhnο byτ τaκim, chτοby οτdelnye sτρui οχlazhdayuschey zhidκοsτi, isτeκayuschie of sοπel 8 κazhdοgο of κοlleκτοροv 3.4 at the onset

10 leafy I purchased a common one. The diameter of each nozzle 8 may be from 8 to 16 mm.

Turning the sheet I, moving at the second wheel speed 2 with a speed of 7 to 12 m / s

15 dependencies. οτ τρebuemοgο ρezhima οχlazhdeniya on κazh- dοm of uchasτκοv 5 οdnοvρemennο ποdayuτ οsnοvnye and dοποl- niτelnye ποτοκi 6 and 7 of οχlazhdayuschey zhidκοsτi sοοτveτ- sτvuyuschiχ τρubchaτyχ κοlleκτοροv 3 and 4, between φορmiρuya ni- E οτρazhennymi οτ ποveρχnοsτi lisτοvοgο προκaτa ποτοκa-

20 mi of 9 coolant with a thickness of 0.03 to 0.1 m, which is in the state of a stable film storage. A good amount of storage is obtained in that 9 (Fig. 2) of the coolant is separated from the surface of the filter at a rate of 10 mm, 0.2 mm

25 at a speed at the "- с π π" "" section, the wavelength arises, the length is short, as it is short of time:

where: b'-coefficient of surface tension of the coolant, nm; - acceleration of free fall, m / s; - πlοτnοsτ οχlazhdayuschey zhidκοsτi, κg / m ^with s, p ₂ - πlοτnοsτ πaρa, κg / m ^3. - 7 -

For water, the length of the wavelength is 0.17 m. The main flow generates a corner ^ (Fig. 3) for the purpose of disengaging the customer’s equipment. This angle can be between 15 ° and 80 ° and depends on the condition of the 5th position between the cooling units 3 and the cooling unit and the Optional 7 coolant fluids are supplied from the working unit 4 at the corner β of the front panel

10, part I, on the other hand, friend to friend. OPTIONAL PROCESSES 7 APPLICABLE FOR PREPARATION OF EMPLOYED ACCESSORIES FOR OPERATION OF FOLDING I.

These 7 optional paths may be inverted to the transverse part of the leaf I, since

15 in the case eτοm uπροschaeτsya iχ ποdacha on lisτοvοy προκaτ I. Οdnaκο uslοviya for ποdzhaτiya οτρazhennyχ ποτοκοv 7 κ πο- veρχnοsτi lisτοvοgο προκaτa I χuzhe, τaκ κaκ veκτορa dο- ποlniτelnyχ and οsnοvnyχ ποτοκοv imeyuτ vsτρechnοe naπρav- Leniye, chτο chasτο πρivοdiτ κ οbρazοvaniyu bρyzg and on the rush

20th anniversary of coolant layer 9.

The angle β depends on the angle ο, always greater or less than it and can be from 20 ° to 90 °. Angle β> in front is visually dependent on direct operation and in a predetermined cooling mode, so that there is no

25 rupture of layer 9 on the other hand, the speed of the leaf I. The speed of the additional accessories 7 is always larger or equal to the speed of 6%.

Β In that case, if the working collectors 3, 4 are installed

30 nοvleny neποdvizhnο and naπορ οχlazhdayuschey zhidκοsτi mοzhnο uvelichivaτ in τaκiχ πρedelaχ, chτο dοποlniτelnymi ποτο- κami 7 nevοzmοzhnο ποdzhaτ οτρazhennye ποτοκi κ ποveρχ- nοsτi lisτοvοgο προκaτa I, in κachesτve οχlazhdayuschey zhidκοsτi isποlzuyuτ eleκτροπροvοdyaschuyu zhidκοsτ. Conventional any process water used for cooling is - 8 -

It is electrified. And for the optional 7 coolant fluids, they are electrically powered to maintain the required supply angle 7.

5 with the help of elec- trons II (Fig. 4), as well as high voltage, a value of 50 to 120 κΒ. The disruption of the movement of the additional 7 flows in the electros-

10 garlics in parallel with leaves 2.

Items II can be made in the form of a unit installed in the immediate vicinity of the optional 7 process unit with a 4-way connection.

In order to increase the cooling rate of leaves

15 προκaτa I tselesοοbρaznο in slοe 9 οχlazhdayuschey zhidκοsτi dοποlniτelnο vοzbuzhdaτ κοlebaniya πο menyney meρe in dvuχ τοchκaχ, ρassτοyanie ^ (φig.5) between κοτορymi sο- sτavlyaeτ οτ 1,1 dο length 1.7 b sτοyachey vοlny, sοοτveτ- sτvuschey usτοychivοmu sοsτοyaniyu ποveρχnοsτi Ρ ρ section

20 "fluid - pap". Disturbances in layer 9 of the cooling fluid increase the amplitude and frequency of vibrations of the region Ρ of the “fluid - vapor” section. In order to have a cooling liquid, it must be disposed of in a dry condition, the length of the forced wave required

25 choose in the indicated range, which is simple on the basis of the analysis of the conditions of the hydrodynamic equilibrium of the two-fluid medium, which is not applicable. The most stable existence of such a medium is due to the term "Waves of the Earth". When it comes to

30 <1.1 part of the section Ρ "liquid - vapor" is stable, and the liquid does not affect the metal. In the case of b. > Ι »7 b κοlebaniya bysτρο zaτuχayuτ, τaκ κaκ slοy οχlazhdayuscheysya zhidκοsτi dvizheτsya not προisχοdiτ slοzheniya κοlebany. These vibrations in layer 9 of the coolant are excited by any known

- 9 -

by the way. It is simply to excite vibrations with the help of gas flow, as a result of which you can use the air. Gas streams are supplied through branch 12, connected to the 13th compressed air outlet. Unit 5 12 is dispensed with a coolant fluid in the 9th part, in general, the separation between them sets 0.18 to 0.29 unit. 15 to 25 m ³ / h. There is plenty of food for you to have, so that just 10 stuffy puffing reached the surface of the Ρ "liquid - steam" section and stirred it up.

For better understanding of the cooling process, the hot plates below are consumable. 15 Example I.

Ηa οτvοdyaschem τρansπορτnοm ροlgange 2 (φig.Ι) sτana gορyachey προκaτκi τρansπορschρuyuτ sο sκοροsτyu 7 m / s lisτο- vοy προκaτ I τοlschinοy shiρinοy 3 mm and 1.2 m. Lisτοvοy προκaτ I οχlazhdayuτ οτ τemπeρaτuρy 900 ° C dο 580 ° C for vρe - 20 me 12 s, that is, with a speed of about 27 m / s. For the part of the trans-city reglang 2 2 84 m long, six cooling units with Η = 5 m have been developed. Wastewater through each col-25 unit 3.4 is 32 m ³ / h. Reserves 3.4 are located so that each unit 8 is located at a 50 ° angle and is free of charge. From κοlleκτοροv 4 naχοdya- schiχsya on ρassτοyanii b = 0.35 m οτ κοlleκτοροv 3, πο- 30 dayuτ dοποlniτelnye ποτοκi 7 uchasτοκ where vοzmοzhen οτρyv οτρazhennοgο ποτοκa vοdy οτ ποveρχnοsτi lisτοvοgο προκaτa I. Pρi eτοm οτρyv οτρazhennοgο ποτοκa οτ ποveρχnοsτi lisτοvοgο tsροκaτa I are not observed. Sheet metal I must be cooled at 20 ° С for each of the sixteen sections 5 and at the end of cooling it takes - 10 -

repetition, equal to the given. A good cooling rate with the help of the above-mentioned method is higher than the known cooling speeds by $ 10. For example, 2.

5 Sποsοb οχlazhdeniya gορyacheκaτanοgο lisτοvοgο προκaτa οsuschesτvlyayuτ in οsnοvnοm, κaκ in πρimeρe I, for isκlyuche- τοgο Niemi, chτο κοlleκτορy 4 to 7 ποdachi dοποlniτelnyχ ποτσκοv usτanοvleny neποdvizhnο with uglοm οsyami sοπel between 8 and ποveρχnοsτyu lisτοvοgο προκaτa I, ρavnym 70 °,

10 defining angle = 70 ° С. At a height of 0.5 m from the transformer ль ль ль ль 2 2 2 и 2 and at a distance of 0.1 m ο from the village 8 of the collector 4, the electrodes II are installed in the form of rods. They are supplied with a voltage of 100 kB. By operating the electric field for electric power supply II, additional work

15 7 correct the damage and, at the intersection, the angle β is 55 °. With this, the removal of the waste from the leaf I is not observed, due to which the given speed and intensity are ensured.

20 Example 3.

On the outgoing runner 2 of the hot mill there is a chance to cut the sheet I from dynamo steel. The width of the unit I is 2.2 mm, the width is 1.5 m. Before you clean it, you must cool it down at 880 ° С to 600 ° С for

25 7 s, that is, at a speed of 40 ° C / s. Turning off work 10 at work unit 3, corner - ^ - delivery of the basic work 6 to the front of the machine I is 55 ° С. Turns on work 10 and collects 4 for delivery of additional supplies 7. Corner delivers 7

30 on the leaflet I is 62 °. Οdnοvρemennο πο- dayuτ vοzduχ πο πyaτi πaτρubκam, naχοdyaschimsya svοimi κοn- Tsami in slοe 9 οχlazhdayuschey zhidκοsτi ρassτοyanii to 0.1 m οτ ποveρχnοsτi lisτοvοgο προκaτa I. Ρassτοyanie between πaτρubκami sοsτavlyaeτ 0.23 m, chτο sοsτavlyaeτ οκοlο 1.3 s, naπορ vοzzuχa It is 0.23 Μ Pa, diameter - II -

pad 16 mm.

In this case, a predetermined (40 ° C / s) speed of cooling of the sheet from the dynamical steel, which requires high speed of cooling of the products, is ensured. A wide range of refrigeration with the help of this method allows you to increase the cost of production by $ 20.

Pροmyshlennaya πρimenimοsτ Pρodlagaemy sποsοb οχlazhdeniya gορyacheκaτanοgο 10 lisτοvοgο προκaτa mοzheτ byτ isποlzοvan πρi οχlazhde- SRI πρeimuschesτvennο sτalnοgο lisτοvοgο προκaτa on sτa- naχ gορyachey προκaτκi κaκ on sτadiyaχ lisτοvοy προκaτκi lisτοv and ποlοs, and τaκ neποsρedsτvennο πeρed smοτκοy egο in ρulοny. Otherwise, this method may be used by 15 when using the machine.

Claims

- 12 - ΟΡΜΟΡΜΟΡΜΑΑ ΑΟΟΡΕΤΕΗΡΕΤΕΗ

1. The method of cooling a hot product, which is concluded in that, on turning on a dry product, is a non-stop (I) food

5 κοsτ as naπρavlennyχ ποd uglοm (σS) κ ποveρχnοsτi lisτοvοgο προκaτa (I) navsτρechu dρug dρugu dvuχ ποτο- κοv (6) therebetween φορmiρuya οτρazhennymi οτ ποveρχnοsτi lisτοvοgο προκaτa (I) ποτοκami slοy (9) οχlazhdayuschey zhidκοsτi, naχοdyaschiysya in the state of stable film

10 nοgο κiπeniya, πρi κοτοροm on ποveρχnοsτi (P) ρazdela "zhidκοsτ - πaρ" vοzniκaeτ sτοyachaya vοlna, ο τ l a- and h w u and d with I τem, chτο οdnοvρemennο with ποdachey οsnοvnyχ ποτοκοv (6) ποdayuτ two dοποlniτelnyχ ποτοκa ( 7) A cooling fluid, each of which directs itself to participation

15 of the coolant layer (9), located in the immediate vicinity of the corresponding primary product (6).

2. The method of cooling a hot leaf at a price of π.Ι, which arises from the fact that

20 additional coolant flows (7) are directed to the corner (() to turn the coolant off (I) in the opposite direction to the other.

3. Cooling method for hot plates π.π.π. I or 2, ο τl

25 of which, as a coolant, use elec- tric fluids and additional fluids (7) as a coolant, they emit electrically.

4. Sποsοb οχlazhdeniya gορyacheκaτanοgο lisτοvοgο προ- 30 κaτa πο π.π.I or 2, οτl ichayuschiysya τem, chτο in slοe (9) between οχlazhdayuschey zhidκοsτi dοποlniτel- GOVERNMENTAL ποτοκami (7) with οdnοvρemennο ποdachey οsnοvnyχ and dο- ποlniτelnyχ ποτοκοv (6 , 7) The coolant excites vibrations at a lower level in two parts, the increase (-C) between the components is 1.1 to 1.7 lengths -thirteen -

(ϊι) at a steady wave. The method of cooling a hot product is just that, in the case of (9) cooling liquids, there is a good

5 coolant flows (6.7) excite vibrations at a lower level in two parts, the distance (s) between shorts is 1.1 to 1.7 times the longest.

5. The method of cooling the hot plate is π 4, which is subject to

10 in the case of a cooling liquid excites with the help of gas inlet.