EP0079369A1 - A boiler arrangement - Google Patents

A boiler arrangement

Info

Publication number
EP0079369A1
EP0079369A1 EP82901641A EP82901641A EP0079369A1 EP 0079369 A1 EP0079369 A1 EP 0079369A1 EP 82901641 A EP82901641 A EP 82901641A EP 82901641 A EP82901641 A EP 82901641A EP 0079369 A1 EP0079369 A1 EP 0079369A1
Authority
EP
European Patent Office
Prior art keywords
vessel
heating
boiler
inlet
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82901641A
Other languages
German (de)
French (fr)
Inventor
Ragnar Bernstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fagersta AB
Original Assignee
Fagersta AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fagersta AB filed Critical Fagersta AB
Publication of EP0079369A1 publication Critical patent/EP0079369A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F24H1/287—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 in line with the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/50—Water heaters for central heating incorporating heaters for domestic water incorporating domestic water tanks
    • 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
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the present invention relates to a boiler arrangement for heating a heat-transfer medium, such as water, in a heating system utilizing water-carried heat, said system comprising a vessel containing the heat-transfer medium; a combustion chamber in heat-conductive connection with the heat-transfer medium; smoke pipes which extend from the combustion chamber, down through said vessel, and discharge into a combustion-gas collecting chamber; the vessel containing the heat-transfer medium having arranged in its upper part an outlet which leads to the inlet line of the heating system, and beneath said outlet an inlet from the exhaust line of said system.
  • an additional heating circuit which can be connected to the lower part of said boiler.
  • the boiler connections of this additional heating circuit are located beneath the -boiler connections of the main heating circuit.
  • the circuit is dimensioned so that ⁇ he temperature of the return water is below 50oC.
  • the temperature of The return water at the lower part of the aforesaid vessel can be below 50°C.
  • the invention provides a heating system in which the return water from the additional circuit is colder than the return water from the conventional part of the heating system.
  • the additional heat which can be taken from the additional heating circuit is about 10 - 20% of the heat delivered by the boiler.
  • the additional heating circuit may include a socalled aerotemper, i.e.
  • the additional heating circuit may also comprise a closed system carrying water mixed with glycol, for heating the entrances to garages and passages.
  • the boiler water is cooled indirectly by a loop or coil located beneath the return-water inlet from the conventional or main heating system.
  • This closed cooling system may also be incorporated as a ⁇ hird cooling system in the heating system, in which case said closed cooling system is located beneath the return-water inlet from the additional heating circuit in which the boiler water flows. In this way extremely good layering of the temperature of the boiler water in the bottom part of the vessel is obtained.
  • the illustrated exemplary embodiment of the boiler arrangement comprises a boiler casing 1 which encloses a vessel 2 containing heat-transfer medium, which in the illustrated example comprises preferably water.
  • Smoke pipes 4 extend downwardly from a combustion chamber 3 to a smoke-gas collecting chamber 5.
  • An exhaust gas connection 6 extends from the collecting chamber 5 to a chimney.
  • An outlet 7 is arranged in the upper part of the vessel 2 .
  • An inlet 8 from the exhaust line of the heating system is arranged in the lower part of said vessel.
  • the exhaust line is coupled to radiators 12 and 13 through a shunt valve 9 and a pump 11.
  • the total radiating surface of the radiators 12, 13 is relatively small, resulting in a relatively high temperature of the return water at the inlet 8.
  • the temperature of the boiler water in the lower part of the vessel 2 is as low as possible, preferably beneath about 50oC, so that heat generated by the condensation of steam carried by the gases can also be utilized.
  • the illustrated boiler is provided with an additional heating circuit 14 provided with a boiler outlet to said additional circuit located beneath the return-water inlet 8.
  • the boiler water is circulated in the circuit 14 by means of a pump 16.
  • the water circulating in the circuit 14 is returned to the vessel 2 through an inlet 17.
  • the additional circuit 14 is so dimensioned that the water returned to the vessel 2 has a temperature below 50°C.
  • the circuit 14 may comprise a closed system, in which case an additional loop or coil is arranged within the vessel 2, hetween the outlet 15 and the -inlet 17.
  • the boiler water heats the water in the coil, which may contain, for example, water mixed with glycol for heating, for example, garage entrances or passages with the aid of the circuit 14, which in this case comprises a loop or coil buried beneath the garage entrance or passageway.
  • the vessel 2 also includes a tap water reservoir 18, comprising a lower and an upper part, for heating tap water.
  • the inlet 19 of the tap-water reservoir leading to the vessel 2 is connected to a fresh cold-water line and lies beneath the level of the inlet 17 from the additional heating circuit 14.
  • the tap-water reservoir 18 contributes to further layering of the temperature in the bottom part of the vessel 2 into different temperature zones.
  • the additional heating coil may also be used to pre-heat combustion air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

Agencement de chaudiere permettant le chauffage d'un milieu de transfert thermique, tel que de l'eau, d'un systeme de chauffage utilisant la chaleur transportee par l'eau. La chaudiere comprend un recipient (2) contenant le milieu de transfert thermique; une chambre de combustion (3) en connexion de conduction thermique avec le milieu de transfert thermique dans le recipient (2); des conduites de fumee (4) s'etendant de la chambre de combustion (3) vers le bas au travers du recipient (2) et se dechargeant dans le fond du recipient dans une chambre de recolte des gaz d'echappement (5). Le recipient (2) est pourvu dans sa partie superieure d'un orifice de sortie (7) conduisant a la ligne d'entree du systeme de chauffage, et au-dessous de l'orifice de sortie (7) avec un orifice d'entree (8) provenant de la ligne d'echappement du systeme de chauffage. Un ou plusieurs circuits supplementaires de chauffage (14) situes a l'exterieur de la chaudiere et possedant un orifice de sortie (15) du recipient (2) sont dispose de maniere a obtenir un refroidissement supplementaire du milieu de transfert thermique dans la partie inferieure du recipient (2). L'orifice de sortie (15) du recipient (2) vers le circuit ou circuits supplementaire(s) de chauffage (14) se trouvent au-dessous de l'orifice d'entree (8) de la ligne d'echappement du systeme de chauffage, et l'orifice d'entree de l'eau de retour du circuit ou circuits de chauffage (14) est relie a la partie inferieure du recipient (2).A boiler arrangement for heating a heat transfer medium, such as water, of a heating system using heat transported by water. The boiler comprises a vessel (2) containing the heat transfer medium; a combustion chamber (3) in thermal conduction connection with the heat transfer medium in the container (2); smoke pipes (4) extending from the combustion chamber (3) downwards through the container (2) and discharging into the bottom of the container into an exhaust gas collection chamber (5). The container (2) is provided in its upper part with an outlet opening (7) leading to the inlet line of the heating system, and below the outlet opening (7) with an outlet opening inlet (8) from the heating system exhaust line. One or more additional heating circuits (14) located outside the boiler and having an outlet (15) from the container (2) are arranged so as to obtain additional cooling of the heat transfer medium in the lower part of the recipient (2). The outlet (15) from the container (2) to the additional heating circuit (s) (14) are located below the inlet (8) of the exhaust line of the system. heating, and the return water inlet orifice of the heating circuit or circuits (14) is connected to the lower part of the container (2).

Description

A boiler arrangement
The present invention relates to a boiler arrangement for heating a heat-transfer medium, such as water, in a heating system utilizing water-carried heat, said system comprising a vessel containing the heat-transfer medium; a combustion chamber in heat-conductive connection with the heat-transfer medium; smoke pipes which extend from the combustion chamber, down through said vessel, and discharge into a combustion-gas collecting chamber; the vessel containing the heat-transfer medium having arranged in its upper part an outlet which leads to the inlet line of the heating system, and beneath said outlet an inlet from the exhaust line of said system.
Known to the art are heating systems utilizing water-carried heat in which the radiators of the radiator system have relatively small radiating surfaces, resulting in high-temperaxure return water. When a boiler of the above-mentioned kind is used to heat the heat-transfer medium in such a radiator system, the smoke gases are not cooled to a satisfactorily low temperature as they pass down through the smoke pipes, and consequently the temperature of the smoke gases is not low enough to enable steam carried by the smoke to condense. This means that no heat will be generated by steam condensation, resulting inter alia - in unnecessary heat losses. An object of the invention is to provide a boiler arrangement of the aforementioned kind in which these disadvantages are substantially overcome.
Accordingly, there is provided externally of the boiler an additional heating circuit which can be connected to the lower part of said boiler. The boiler connections of this additional heating circuit are located beneath the -boiler connections of the main heating circuit. The circuit is dimensioned so that τhe temperature of the return water is below 50ºC. As a result of this additional heating circuit, the temperature of The return water at the lower part of the aforesaid vessel can be below 50°C. Thus, the invention provides a heating system in which the return water from the additional circuit is colder than the return water from the conventional part of the heating system. The additional heat which can be taken from the additional heating circuit is about 10 - 20% of the heat delivered by the boiler. The additional heating circuit may include a socalled aerotemper, i.e. a heat exchanger in which a fan blows air over flanged pipes, or comprises additional radiators. The additional heating circuit may also comprise a closed system carrying water mixed with glycol, for heating the entrances to garages and passages. In this case, the boiler water is cooled indirectly by a loop or coil located beneath the return-water inlet from the conventional or main heating system. This closed cooling system may also be incorporated as a τhird cooling system in the heating system, in which case said closed cooling system is located beneath the return-water inlet from the additional heating circuit in which the boiler water flows. In this way extremely good layering of the temperature of the boiler water in the bottom part of the vessel is obtained.
An exemplary embodiment of the invention will now be described in more detail with reference to the accompanying schematic drawing. The illustrated exemplary embodiment of the boiler arrangement according to the invention comprises a boiler casing 1 which encloses a vessel 2 containing heat-transfer medium, which in the illustrated example comprises preferably water. Smoke pipes 4 extend downwardly from a combustion chamber 3 to a smoke-gas collecting chamber 5. An exhaust gas connection 6 extends from the collecting chamber 5 to a chimney. Arranged in the upper part of the vessel 2 is an outlet 7 connected to the input line of the heating system, while an inlet 8 from the exhaust line of the heating system is arranged in the lower part of said vessel. The exhaust line is coupled to radiators 12 and 13 through a shunt valve 9 and a pump 11. The total radiating surface of the radiators 12, 13 is relatively small, resulting in a relatively high temperature of the return water at the inlet 8. In order to obtain good heat exchange with the smoke gases flowing down through the smoke pipes 4 it is necessary for the temperature of the boiler water in the lower part of the vessel 2 to be as low as possible, preferably beneath about 50ºC, so that heat generated by the condensation of steam carried by the gases can also be utilized. Because the temperature of the return water at the inlet 8 is above 50°C, the illustrated boiler is provided with an additional heating circuit 14 provided with a boiler outlet to said additional circuit located beneath the return-water inlet 8. The boiler water is circulated in the circuit 14 by means of a pump 16. The water circulating in the circuit 14 is returned to the vessel 2 through an inlet 17. The additional circuit 14 is so dimensioned that the water returned to the vessel 2 has a temperature below 50°C. Optionally, the circuit 14 may comprise a closed system, in which case an additional loop or coil is arranged within the vessel 2, hetween the outlet 15 and the -inlet 17. The boiler water heats the water in the coil, which may contain, for example, water mixed with glycol for heating, for example, garage entrances or passages with the aid of the circuit 14, which in this case comprises a loop or coil buried beneath the garage entrance or passageway.
The vessel 2 also includes a tap water reservoir 18, comprising a lower and an upper part, for heating tap water. The inlet 19 of the tap-water reservoir leading to the vessel 2 is connected to a fresh cold-water line and lies beneath the level of the inlet 17 from the additional heating circuit 14. The tap-water reservoir 18 contributes to further layering of the temperature in the bottom part of the vessel 2 into different temperature zones. In accordance with a particular embodiment of the invention, the additional heating coil may also be used to pre-heat combustion air.

Claims

CLAIMS :
1. A boiler arrangement for heating heat-transfer medium, such as water, in a heating system using watercarried heat, said boiler arrangement including a vessel (2) containing the heat-transfer medium; a combustion chamber (3) in heat-conductive connection with the heattransfer medium in the vessel (2); smoke pipes (4) which extend from the combustion chamber (3) down through said vessel (2) and discharge into a combustion-gas collecting chamber (5); the vessel (2) containing the heattransfer medium having arranged in its upper part an outlet (7) which leads to the inlet line of the heating system, and an inlet (8) from the exhaust line of said system located beneath said outlet (7), characterized by at least one additional heating circuit (14) located externally of the boiler and having a vessel-outlet (15) located beneath the inlet (8) from the exhaust line of the heating system and inlet (17) to the vessel (2) in the lower part of said vessel, where the lower circuits are dimensioned so that the temperature of the return water is below 50°C, to enable the heat of condensation of steam carried by the smoke gases to be utilized.
2. A boiler arrangement according to claim 1, characterized in that arranged in the vessel (2) is a reservoir or loop (18) for heating tap water, the lowest part (19) of the tap water reservoir lying beneath the level of the inlet (17) from the additional heating circuit (14) located externally of the boiler.
3. A boiler arrangement according to claim 1 or claim 2, characterized by a further heating circuit additional to said additional heating circuit, comprising a closed system which contains water mixed with glycol.
EP82901641A 1981-05-21 1982-05-21 A boiler arrangement Withdrawn EP0079369A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8103212 1981-05-21
SE8103212 1981-05-21

Publications (1)

Publication Number Publication Date
EP0079369A1 true EP0079369A1 (en) 1983-05-25

Family

ID=20343895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901641A Withdrawn EP0079369A1 (en) 1981-05-21 1982-05-21 A boiler arrangement

Country Status (2)

Country Link
EP (1) EP0079369A1 (en)
WO (1) WO1982004115A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8402924D0 (en) * 1984-02-03 1984-03-07 Gledhill Water Storage Water heating apparatus
GB8416363D0 (en) * 1984-06-27 1984-08-01 Gledhill Water Storage Water heating apparatus
AU642126B2 (en) * 1985-11-12 1993-10-14 Heatmaster Technology Pty Ltd Hot water supply
DE3714261C1 (en) * 1987-04-29 1988-07-07 Rolf Bommer Condensing boiler and method for its operation
NL9400977A (en) * 1994-06-15 1996-01-02 Dejatech Bv Boiler, equipped with a number of rooms.
BE1015568A3 (en) * 2003-06-18 2005-06-07 Acv Mfg Sa Production installation hot water.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE405892B (en) * 1977-05-25 1979-01-08 Eriksson Leif SMOKE GAS RINSE DEVICE
DE2837004A1 (en) * 1978-08-24 1980-03-06 Bernstein Lennart METHOD AND HEATING BOILER FOR HEATING THE HEATING WATER IN A HOT WATER CENTRAL HEATING SYSTEM, ESPECIALLY FOR DETACHED AND MULTI-FAMILY RESIDENTIAL HOUSES
SE416673B (en) * 1979-04-06 1981-01-26 Fagersta Ab Method and device for recovering residual heat from combustion gases as well as cleaning of same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8204115A1 *

Also Published As

Publication number Publication date
WO1982004115A1 (en) 1982-11-25

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19830808

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BERNSTEIN, RAGNAR