SE468365B - HEAT MIPPANA, WHERE HEAT-TRANSFORMING WALLS ARE SUPPLIED WITH TURBULENCING BODY ON THE SMOKE GAS SIDE - Google Patents
HEAT MIPPANA, WHERE HEAT-TRANSFORMING WALLS ARE SUPPLIED WITH TURBULENCING BODY ON THE SMOKE GAS SIDEInfo
- Publication number
- SE468365B SE468365B SE8603907A SE8603907A SE468365B SE 468365 B SE468365 B SE 468365B SE 8603907 A SE8603907 A SE 8603907A SE 8603907 A SE8603907 A SE 8603907A SE 468365 B SE468365 B SE 468365B
- Authority
- SE
- Sweden
- Prior art keywords
- flue gas
- wall
- heat
- boiler according
- tube
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/022—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being wires or pins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
- F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
- F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
- F24H1/285—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged alongside the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
- F24H9/0026—Guiding means in combustion gas channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Incineration Of Waste (AREA)
Description
15 20 25 30 35 O\ 01 Ändamålet med uppfinningen är att åstadkomma en värmepanna av det inled- ningsvis nämnda slaget, vilken- uppvisar ett väsentligt förbättrat värmeöver- gångstal på rökgassidan, vilket i sin tur kan medföra lägre temperatur på den utgående rökgasen och därmed förbättrad värmeekonomi, varvid trvckfallet genom konvektionselementen ej får öka. The object of the invention is to provide a boiler of the type mentioned in the introduction, which has a significantly improved heat transfer number on the flue gas side, which in turn can lead to a lower temperature of the outgoing flue gas and thus improved heat economy, whereby the pressure drop through the convection elements must not increase.
Uppfinningen kännetecknas i detta syfte av de tillhörande patentkraven 1-8.The invention is characterized for this purpose by the appended claims 1-8.
Enligt uppfinningen är således på väggens rökgassida anordnade ett flertal turbu- lensskapande organ väsentligen riktade vinkelrätt mot väggen och väsentligen likformigt fördelade över väggen med inbördes mellanrum. Organens höjd sam- manfaller väsentligen med tjockleken hos rökgasströmmens gränsskikt. Organens längdutsträckning är större än höjden och deras sidoväggar är begränsade av väsentligen räta linjer till ett tvärsnitt hos organen av 2 X2 till 7 x7rnm.According to the invention, a plurality of turbulence-creating means are thus arranged on the flue gas side of the wall, substantially directed perpendicular to the wall and substantially uniformly distributed over the wall at mutual intervals. The height of the members substantially coincides with the thickness of the boundary layer of the flue gas stream. The longitudinal extent of the members is greater than the height and their side walls are limited by substantially straight lines to a cross section of the members of 2 x 2 to 7 x 7 m.
Längdutsträckningen hos organen bildar en vinkel 5-45° med rökgasens ström- ningsriktning.The longitudinal extension of the members forms an angle of 5-45 ° with the flow direction of the flue gas.
Lämpligen är tvärsnittet hos organen format som ett parallelltrapets, företrä- desvis i form av en rektangel.Preferably, the cross section of the members is shaped like a parallel trapezoid, preferably in the form of a rectangle.
De turbulensskapande organen är lämpligen så anordnade på väggens rökgassida, att deras längdutsträckning bildar en vinkel av 15 till 45° med rökgasens ström- ningsriktning. l sådana värmepannor, som är försedda med konvektionselement i form av tuber, företrädesvis med cirkulärt tvärsnitt, raka eller i form av cylindriska ringar, är det fördelaktigt att anordna det turbulensskapande organet med sin längdaxel, eller de turbulensskapande organen med sina längdaxlar, sträckande sig i en första skruvbana längs tubens inre vägg, vilken är rökgassida, varvid denna första skruvbana bildar en vinkel av 5° till 45° med plan, vinkelräta mot tubens längd- axelriktning. I-de fall då rökgasen inträder tangentiellt i en sådan konvektionstub, strömmar rökgasen i en andra skruvbana genom konvektionstuben, och det turbu- lensskapande organets längdaxel beskriver lämpligen en första, motsatt skruv- bana. I en lämplig utformning är den nämnda vinkeln omkring lO° och organets tvärsnitt omkring 3 x 3 mm. Ett sådant organ ger i ett konvektionselement som är cvlindriskt ringformat med cirkulärt tvärsnitt inget förhöjt tryckfall vid nor- mala driftsförhållanden. fèi 10 15 20 25 30 35 468 365 Konvektionselement tillverkas av gjutjärn, eller av plåt. l båda fallen är det lämpligt att tillverka de turbulensskapande organen integrerat med väggmateria- let, dvs gjutna direkt med väggen i fallet gjutjärn och präglade då det gäller plåt.The turbulence generating means are suitably arranged on the flue gas side of the wall so that their longitudinal extent forms an angle of 15 to 45 ° with the flow direction of the flue gas. In such boilers which are provided with convection elements in the form of tubes, preferably with a circular cross-section, straight or in the form of cylindrical rings, it is advantageous to arrange the turbulence-generating member with its longitudinal axis, or the turbulence-creating means with their longitudinal axes, extending in a first helical path along the inner wall of the tube, which is the flue gas side, this first helical path forming an angle of 5 ° to 45 ° with a plane perpendicular to the longitudinal axis direction of the tube. In cases where the flue gas enters tangentially in such a convection tube, the flue gas in a second helical path flows through the convection tube, and the longitudinal axis of the turbulence generating member suitably describes a first, opposite helical path. In a suitable design, said angle is about 10 ° and the cross section of the member is about 3 x 3 mm. Such a member does not give an increased pressure drop under normal operating conditions in a convection element which is cylindrical annular with a circular cross-section. fèi 10 15 20 25 30 35 468 365 Convection elements are made of cast iron, or of sheet metal. In both cases, it is suitable to manufacture the turbulence-creating means integrated with the wall material, ie cast directly with the wall in the case of cast iron and embossed in the case of sheet metal.
Uppfinningen skall nu beskrivas mer i detalj, med hänvisning till de bifogade ritningarna, på vilka: figur 1 visar en vy av ett vertikalt tvärsnitt genom en värmepanna med konvek- tionselement med plana väggar, försedd med-turbulensskapande organ enligt uppfinningen; figur 2 visar en vy av de turbulensskapande organen i figur l i större skala (natur- lig storlek); figur 3 visar ett tvärsnitt genom ett turbulensskapande organ, med underliggande vägg, längs linjen lll - lll i figur 2; figur 4 visar en vy av ett vertikalt längdsnitt genom en värmepanna av flamrörs- typ, vilken är försedd med turbulensskapande organ enligt uppfinningen; figur 5 visar ett vertikalt tvärsnitt genom värmepannan i figur 4, och figur 6 visar en vy av ett längdsnitt genom ett konvektionselement, dvs en tub, försedd med turbulensskapande organ enligt uppfinningen, i större skala än i figur 4, 5.The invention will now be described in more detail, with reference to the accompanying drawings, in which: Figure 1 shows a view of a vertical cross-section through a boiler with convection elements with flat walls, provided with co-turbulence generating means according to the invention; Figure 2 shows a view of the turbulence generating means of Figure 1 on a larger scale (natural size); Figure 3 shows a cross section through a turbulence generating member, with underlying wall, along the line III - III in Figure 2; Figure 4 shows a view of a vertical longitudinal section through a flame tube-type boiler, which is provided with turbulence-creating means according to the invention; Figure 5 shows a vertical cross-section through the boiler in Figure 4, and Figure 6 shows a view of a longitudinal section through a convection element, i.e. a tube, provided with turbulence-creating means according to the invention, on a larger scale than in Figures 4, 5.
Värmepannan i figur 1 är uppbyggd av ett flertal gjutna sektioner med excentrisk placering av ett flamrum l. Ett konvektionselement 2 bildar tillsammans med ett icke visat främre konvektionselement en rökgaskanal med plana väggar, för- sedda med ett flertal turbulensskapande organ 3. Den nämnda rökgaskanalen har ett inlopp 4 och ett utlopp 5, och rökgasens strömningsväg markeras med pilar 6, 7. Som framgår av figuren strömmar rökgasen väsentligen i vertikal rikt- ning genom rökgaskanalen. l figur 2 visas de turbulensskapande organen 3 i na- turlig storlek. De är anordnade sicksack med visst avstånd både i sidled ochi A 68 56 10» 15 20 25 30 35 lodled. De bildar vinklarna ß 1, (3 2 med rökgasens strömningsriktning, antydd av pilen 7. l det visade exemplet är ß 1: [32 = 30°. Av figur 3 framgår, att de turbulensskapande organens tvärsnitt begränsas av väsentligen räta linjer och i princip bildar en kvadrat med sidan ca 4 mm.The boiler in figure 1 is built up of a plurality of cast sections with eccentric placement of a flame space 1. A convection element 2 together with a front convection element (not shown) forms a flue gas duct with flat walls, provided with a plurality of turbulence generating means 3. The said flue gas duct has an inlet 4 and an outlet 5, and the flow path of the flue gas is marked with arrows 6, 7. As can be seen from the figure, the flue gas flows substantially in the vertical direction through the flue gas duct. Figure 2 shows the turbulence generating means 3 in natural size. They are arranged zigzags at a certain distance both laterally and vertically. A 68 56 10 »15 20 25 30 35. They form the angles ß 1, (3 2 with the flow direction of the flue gas, indicated by the arrow 7. In the example shown, ß 1: [32 = 30 °. Figure 3 shows that the cross section of the turbulence generating means is limited by substantially straight lines and in principle forms a square with the side about 4 mm.
Såsom även framgår av figur 3 är de turbulensskapande organen tillverkadei ett stycke med underliggande vägg, dvs gjutna på samma gång som väggen.As can also be seen from Figure 3, the turbulence generating means are made in one piece with the underlying wall, ie cast at the same time as the wall.
I figur 4 och 5 betecknar 8 ett cirkulärcvlindriskt flamrum, omgivet av konvek- tionselement med tubformade rökgaskanaler 9, dvs i form av cylindriska ringar med cirkulärt tvärsnitt. Dessa är försedda med tangentiella rökgasinlopp 10, och utlopp ll i en gemensam utloppskanal 12. Vattenanslutningar till tubernas vattensida betecknas med 13 och 14.In Figures 4 and 5, 8 denotes a circular-cylindrical flame space, surrounded by convection elements with tubular flue gas ducts 9, ie in the form of cylindrical rings with a circular cross-section. These are provided with tangential flue gas inlets 10, and outlets 11 in a common outlet duct 12. Water connections to the water side of the tubes are denoted by 13 and 14.
Tuberna är försedda med turbulensskapande organ 15 i form av en sammanhäng- ande skruv längs tubernas insida, vilken bildar en vinkel [33 med plan vinkelräta mot tubens längdaxel. Det turbulensskapande organet 15 är anordnat på ett sådant sätt i förhållande till rökgasinloppet 10, att den skruvbana, som rökgas- strömmen följer, är motriktad den, som det turbulensskapande organet 15 bildar.The tubes are provided with turbulence generating means 15 in the form of a continuous screw along the inside of the tubes, which forms an angle [33 with planes perpendicular to the longitudinal axis of the tube. The turbulence generating means 15 is arranged in such a manner relative to the flue gas inlet 10 that the helical path which the flue gas stream follows is opposite to that formed by the turbulence generating means 15.
Detsamma uppvisar ett kvadratiskt tvärsnitt med måtten ca 3 x 3 mm, och tu- bens tvärsnitt har i detta fall en diameter av 75 mm. Anordnandet av turbulens- skapande organ 15 har inte inneburit något ökat trvckfall på rökgassidan i denna värmepanna, vilken är avsedd för övertrvckseldning.The same has a square cross-section with the dimensions approx. 3 x 3 mm, and the cross-section of the tube in this case has a diameter of 75 mm. The provision of turbulence generating means 15 has not entailed any increased pressure drop on the flue gas side in this boiler, which is intended for overpressure heating.
Värmepannor enligt uppfinningen uppvisar, jämförda med sådana, utan turbulens- skapande organ enligt uppfinningen, en sänkning av rökgastemperaturen av stor- leksordningen 25 - 35°, vilket möjliggör höjning av effekten med 20 - 30%.Boilers according to the invention show, compared with those without turbulence-creating means according to the invention, a reduction of the flue gas temperature of the order of 25 - 35 °, which enables an increase of the power by 20 - 30%.
De visade exemplen på värmepannor enligt uppfinningen utgör givetvis endast exempel på utföringsformer. En mångfald sådana är tänkbara inom ramen för uppfinningen. få I I?The examples of boilers according to the invention shown are, of course, only examples of embodiments. A variety of such are conceivable within the scope of the invention. get I I?
Claims (8)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8603907A SE468365B (en) | 1986-09-16 | 1986-09-16 | HEAT MIPPANA, WHERE HEAT-TRANSFORMING WALLS ARE SUPPLIED WITH TURBULENCING BODY ON THE SMOKE GAS SIDE |
GB8720641A GB2198506B (en) | 1986-09-16 | 1987-09-02 | Heating boiler with improved heat transfer |
DE19873730566 DE3730566A1 (en) | 1986-09-16 | 1987-09-11 | BOILER |
DE8712344U DE8712344U1 (en) | 1986-09-16 | 1987-09-11 | boiler |
FI873975A FI873975A (en) | 1986-09-16 | 1987-09-14 | VAERMEPANNA MED FOERBAETTRAD VAERMEOEVERFOERING. |
DK480087A DK480087A (en) | 1986-09-16 | 1987-09-15 | HEAT BOILER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8603907A SE468365B (en) | 1986-09-16 | 1986-09-16 | HEAT MIPPANA, WHERE HEAT-TRANSFORMING WALLS ARE SUPPLIED WITH TURBULENCING BODY ON THE SMOKE GAS SIDE |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8603907D0 SE8603907D0 (en) | 1986-09-16 |
SE8603907L SE8603907L (en) | 1988-03-17 |
SE468365B true SE468365B (en) | 1992-12-21 |
Family
ID=20365616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8603907A SE468365B (en) | 1986-09-16 | 1986-09-16 | HEAT MIPPANA, WHERE HEAT-TRANSFORMING WALLS ARE SUPPLIED WITH TURBULENCING BODY ON THE SMOKE GAS SIDE |
Country Status (5)
Country | Link |
---|---|
DE (2) | DE8712344U1 (en) |
DK (1) | DK480087A (en) |
FI (1) | FI873975A (en) |
GB (1) | GB2198506B (en) |
SE (1) | SE468365B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3813501A1 (en) * | 1988-04-22 | 1989-11-09 | Licentia Gmbh | COUNTERFLOW HEAT EXCHANGER |
GB2236841B (en) * | 1989-08-09 | 1993-09-01 | James Wing Ho Wong | Heat exchangers |
GB2398622B (en) * | 2003-02-19 | 2005-12-28 | Worcester Heat Systems Ltd | Boiler assembly |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB438924A (en) * | 1934-03-31 | 1935-11-26 | Walter George Case | Improvements in or relating to boilers for heating water |
US2024743A (en) * | 1934-09-18 | 1935-12-17 | Westinghouse Electric & Mfg Co | Heat transfer surface |
GB454655A (en) * | 1935-02-01 | 1936-10-01 | Percy Warren Noble | Improvements in heating apparatus for water or air |
GB524713A (en) * | 1939-02-04 | 1940-08-13 | James Stott And Co Engineers L | Interior for hot water boilers of cafe and canteen sets and such like |
GB693067A (en) * | 1951-03-30 | 1953-06-24 | Main Water Heaters Ltd | Improvements in or relating to heat exchangers |
DE1920513U (en) * | 1965-05-13 | 1965-07-29 | Broetje Fa August | BOILER. |
LU52798A1 (en) * | 1967-01-12 | 1967-03-13 | ||
DE1973611U (en) * | 1967-08-25 | 1967-11-30 | Buderus Eisenwerk | PANEL BOILER WITH HEATING GAS DRAWS OUTSIDE THE COMBUSTION CHAMBER. |
SE357053B (en) * | 1971-08-26 | 1973-06-12 | Husqvarna Vapenfabriks Ab | |
CH628134A5 (en) * | 1978-03-28 | 1982-02-15 | Ygnis Sa | FLUE GAS FLOWED HEAT EXCHANGER. |
DK170282A (en) * | 1982-04-16 | 1983-10-17 | Simonsen Joergen Valdemar Fran | HOT WATER BOILER |
-
1986
- 1986-09-16 SE SE8603907A patent/SE468365B/en not_active IP Right Cessation
-
1987
- 1987-09-02 GB GB8720641A patent/GB2198506B/en not_active Expired - Fee Related
- 1987-09-11 DE DE8712344U patent/DE8712344U1/en not_active Expired
- 1987-09-11 DE DE19873730566 patent/DE3730566A1/en active Granted
- 1987-09-14 FI FI873975A patent/FI873975A/en not_active IP Right Cessation
- 1987-09-15 DK DK480087A patent/DK480087A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE3730566A1 (en) | 1988-04-21 |
GB8720641D0 (en) | 1987-10-07 |
GB2198506A (en) | 1988-06-15 |
SE8603907L (en) | 1988-03-17 |
GB2198506B (en) | 1990-05-23 |
SE8603907D0 (en) | 1986-09-16 |
FI873975A0 (en) | 1987-09-14 |
DE8712344U1 (en) | 1987-11-26 |
DK480087A (en) | 1988-03-17 |
DK480087D0 (en) | 1987-09-15 |
DE3730566C2 (en) | 1991-04-18 |
FI873975A (en) | 1988-03-17 |
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