WO2019008005A1 - Cast element for a heat exchanger - Google Patents

Cast element for a heat exchanger Download PDF

Info

Publication number
WO2019008005A1
WO2019008005A1 PCT/EP2018/068025 EP2018068025W WO2019008005A1 WO 2019008005 A1 WO2019008005 A1 WO 2019008005A1 EP 2018068025 W EP2018068025 W EP 2018068025W WO 2019008005 A1 WO2019008005 A1 WO 2019008005A1
Authority
WO
WIPO (PCT)
Prior art keywords
turn
water
opening
heat exchanger
section
Prior art date
Application number
PCT/EP2018/068025
Other languages
French (fr)
Inventor
Hasan TASHACORI
Gertjan Zwiggelaar
Original Assignee
Bekaert Combustion Technology B.V.
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 Bekaert Combustion Technology B.V. filed Critical Bekaert Combustion Technology B.V.
Publication of WO2019008005A1 publication Critical patent/WO2019008005A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • 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
    • F24H1/30—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 being built up from sections
    • F24H1/32—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 being built up from sections with vertical sections arranged side by side

Definitions

  • the invention relates to the field of cast elements for heat exchangers.
  • EP1669689A2 discloses a cast element for a heat exchanger comprising a combustion chamber for the generation of hot gas; a water flow channel for the flow of water to be heated; and a metal wall delimiting the water flow channel.
  • the metal wall is provided for exchanging heat between the hot gas and water flowing through the water flow.
  • the water flow channel comprises a number of consecutive parallel straight segments. Each two consecutive parallel straight segments are separated by an intermediate wall and by a U-turn.
  • the U-turns comprise deviating elements positioned in the water flow channel to deviate the water flow.
  • the deviating elements extend over the whole length of a segment of a U-turn and correspond with the contour of the wall of the U-turn.
  • the U-turn comprises a through opening for the removal - after casting - of the sand core used for forming the water channel during metal casting. The through opening is provided at the imaginary extension of the intermediate wall.
  • the first aspect of the invention is a cast element for a heat exchanger.
  • the cast element comprises a combustion chamber for the generation of hot gas; at least one water flow channel for the flow of water to be heated; and two metal walls delimiting the water flow channel.
  • the two metal walls are provided for exchanging heat between the hot gas and water flowing through the water flow channel.
  • the at least one water flow channel is provided for water flow in counter direction to the flow of hot gas.
  • the at least one water flow channel comprises a number of consecutive parallel straight segments. Two consecutive parallel straight segments are separated by an intermediate wall and by a U- turn.
  • the intermediate wall connects the two metal walls.
  • Each U-turn comprises an upstream section and a downstream section.
  • the upstream section and the downstream section each are a 90° segment of the U-turn.
  • At least one of the U-turns - named the first U-turn - comprises a through opening for the removal after casting of the sand core for forming the water channel in metal casting.
  • the number "first” in “first U-turn” does not refer to a numerical order of U-turns in the water channel.
  • the through opening is fully comprised in the upstream section of the first U-turn.
  • the through opening is a cylindrical opening.
  • the cast element of the invention has the benefit that the sand of the sand core providing the water channel during metal casting can be more easily removed after casting, while a water channel is obtained that allows efficient water flow as required for optimum operation of the heat exchanger. Another benefit is that quality of casting can be more easily inspected after removal of the sand core.
  • the cast element is provided out of aluminum or out of an aluminum alloy.
  • the through cylindrical opening is provided parallel with the two consecutive parallel straight segments separated by the first U-turn
  • the intermediate wall separating two consecutive parallel straight segments of the water flow channel is a metal wall common to the two consecutive parallel straight segments.
  • the downstream section of the first U-turn comprises a curved baffle parallel with and corresponding with the contour of the wall of the downstream section of the first U-turn.
  • the curved baffle follows the full length of the contour of the downstream section of the first U-turn.
  • the upstream section of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U-turn. More preferably, the upstream section of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U-turn that follows the full length of the contour of the upstream section of the first U-turn.
  • the upstream section of the first U-turn comprises reinforcing pins extending between and connecting the two metal walls delimiting the water channel.
  • the reinforcing pins have a circular cross section.
  • the reinforcing pins in the upstream section of the first U-turn can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
  • the downstream section of the first U-turn comprises reinforcing pins extending between and connecting the two metal walls delimiting the water channel.
  • the reinforcing pins in the downstream section of the first U-turn can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
  • the two consecutive parallel straight segments are separated by an intermediate wall and by a first U-turn each comprising reinforcing pins extending from and connecting the two metal walls delimiting the water channel.
  • the reinforcing pins in the parallel straight segments can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
  • the water channel comprises a second U-turn in water flow direction downstream from the first U-turn.
  • the numeral "second" is used to differentiate the second U-turn from the first U-turn; and does not refer to a numerical order of U-turns in the water channel.
  • the first U-turn and the second U-turn are connected by a common straight segment of the water channel.
  • the second U-turn comprises a through opening - preferably a cylindrical through opening - for the removal after casting of the sand core for forming the water channel in metal casting.
  • the through opening is fully provided in the upstream section or in the downstream section of the second U-turn.
  • the through opening in the second U-turn is provided parallel with the two consecutive parallel straight segments separated by the second U-turn.
  • the through opening of the second U-turn is fully provided in the upstream section of the second U- turn.
  • the sand core for building the water channel can be effectively removed, after metal casting, out of the upstream straight segment leading to the first U-turn and out of the common straight segment connecting the first U-turn with the second U-turn.
  • Sand in the upstream straight segment leading to the first U-turn can be very effectively removed through the through opening in the first U-turn.
  • Sand in the straight segment downstream from the first U-turn - which is the common straight segment with and leading to the second U-turn - can be very effectively removed through the through opening in the second U-turn. After removal of the sand core, the water channels can be inspected more easily.
  • the cast element is provided as a section for parallel side by side assembly in a sectional heat exchanger.
  • the second aspect of the invention is a heat exchanger element comprising a cast
  • the through opening or through openings is or are closed by a plug inserted in the cylindrical opening.
  • the plugs are screwed into the cylindrical openings.
  • a sealing agent is provided between the plug and the cylindrical opening.
  • plugs can be pressed into the through opening in order to close the through opening.
  • the third aspect of the invention is a sectional heat exchanger.
  • the exchanger comprises a plurality of cast elements as in any embodiment of the first aspect of the invention.
  • the cast elements are assembled side by side such that the at least one water channels of each of the cast elements are connected in parallel flow connection.
  • the through openings are closed by a plug inserted in the cylindrical opening. More preferably, the plugs are screwed into the cylindrical openings. More preferably, a sealing agent is provided between the plug and the cylindrical opening.
  • plugs can be pressed into the through opening in order to close the through opening.
  • a preferred sectional heat exchanger comprises a combustion chamber for the
  • the combustion chamber of the sectional heat exchanger is provided by the combination of the combustion chambers of the cast elements.
  • the fourth aspect of the invention is a heat cell comprising a sectional heat exchanger as in the third aspect of the invention.
  • a burner preferably a fully premixed surface stabilized premix gas burner, is provided in the combustion chamber of the sectional heat exchanger for the generation of hot gas.
  • Figure 1 shows a cast element for a heat exchanger according to the invention.
  • FIG. 2 shows a detail of a U-turn of the heat exchanger according to the invention.
  • Figure 1 shows a cast element 100 for a heat exchanger according to the invention.
  • the cast element can be used as a section for parallel side by side assembly in a sectional heat exchanger.
  • the cast element 100 comprises a combustion chamber 102 for the generation of hot gas; a water flow channel 104 for the flow of water to be heated; and (not shown in figure 1 ) two metal walls delimiting the water flow channel.
  • the metal walls are provided for exchanging heat between the hot gas and water flowing through the water flow channel.
  • the water flow channel is provided for water flow in counter direction to the flow of hot gas, via a water entrance 106 and a hot water exit 108.
  • the water flow channel comprises a number of consecutive parallel straight segments 1 10. Two consecutive parallel straight segments are separated by an intermediate wall 1 12 extending from and connecting the two metal walls; and by a U-turn 1 14. Each U-turn comprises - in water flow direction - an upstream section 1 16 and a downstream section 1 18. The upstream section and the downstream section each are a 90° segment of the U- turn.
  • Figure 2 shows a detail of this U-turn, indicating the upstream section 1 16 and the downstream section 1 18 that each are a 90° segment of the U-turn, as indicated by the dotted lines 190, 192.
  • a first U-turn 1 14 comprises a through opening 120 for the removal after casting of the sand core for forming the water channel in metal casting. The through opening 120 is fully comprised in the upstream section of the first U-turn 1 14.
  • the downstream section 1 18 of the first U-turn 1 14 comprises a curved baffle 122 parallel with and corresponding with the contour of the wall of downstream section of the first U- turn.
  • the curved baffle 122 follows the full length of the contour of the downstream section of the first U-turn.
  • the upstream section 1 16 of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U- turn.
  • the curved baffle extends between and connects the two metal cast walls delimiting the water channel.
  • the upstream section 1 16 of the first U-turn comprises reinforcing pins 126 extending between and connecting the two metal walls of the water channel.
  • the downstream section of the first U-turn comprises reinforcing pins 128 extending between and connecting the two metal walls delimiting the water channel.
  • the reinforcing pins in the upstream section of the first U-turn as well as in the downstream section of the first U-turn have a drop shaped cross section.
  • the drop shape is aligned with the flow direction of the water in the water channel.
  • the two consecutive parallel straight segments separated by an intermediate wall and by the first U-turn each comprise reinforcing pins 130 extending between and connecting the two metal walls delimiting the water channel.
  • the reinforcing pins 130 have a drop shaped cross section. The drop shape is aligned with the flow direction of the water in the straight segments of the water channel.
  • the water channel of the cast element comprises a second U-turn 142 downstream from the first U-turn 1 14.
  • the first U-turn 1 14 and the second U-turn 142 are connected by a common straight segment 144 of the water channel.
  • the second U-turn 142 comprises a through opening 146 for the removal after casting of the sand core for forming the water channel in metal casting. The through opening is fully provided in the upstream section of the second U-turn.
  • the through openings have to be closed. This can be done by means of plugs that are screwed into the through openings.
  • the opening and the plug comprise engaging screw thread.
  • sealing agent is applied in the through opening when screwing the plug into the through opening to ensure that no water will leak through.
  • the plug can be pressed into the through opening in which a sealing agent is provided.
  • plugs can be pressed into the through opening in order to close the through opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The cast element comprises a combustion chamber for the generation of hot gas; at least one water flow channel for the flow of water to be heated; and two metal walls delimiting the water flow channel for exchanging heat between the hot gas and water flowing through the water flow channel. The at least one water flow channel is provided for water flow in counter direction to the flow of hot gas. The at least one water flow channel comprises a number of consecutive parallel straight segments. Two consecutive parallel straight segments are separated by an intermediate wall and by a U-turn. Each U-turn comprises an upstream section and a downstream section. The upstream section and the downstream section each are a 90° segment of the U-turn. A first U-turn comprises a through opening for the removal after casting of the sand core for forming the water channel in metal casting. The through opening is fully comprised in the upstream section of the first U-turn.

Description

Cast element for a heat exchanger
Description
Technical Field
[1] The invention relates to the field of cast elements for heat exchangers.
Background Art
[2] EP1669689A2 discloses a cast element for a heat exchanger comprising a combustion chamber for the generation of hot gas; a water flow channel for the flow of water to be heated; and a metal wall delimiting the water flow channel. The metal wall is provided for exchanging heat between the hot gas and water flowing through the water flow. The water flow channel comprises a number of consecutive parallel straight segments. Each two consecutive parallel straight segments are separated by an intermediate wall and by a U-turn. The U-turns comprise deviating elements positioned in the water flow channel to deviate the water flow. The deviating elements extend over the whole length of a segment of a U-turn and correspond with the contour of the wall of the U-turn. The U-turn comprises a through opening for the removal - after casting - of the sand core used for forming the water channel during metal casting. The through opening is provided at the imaginary extension of the intermediate wall.
Disclosure of Invention
[3] The first aspect of the invention is a cast element for a heat exchanger. The cast element comprises a combustion chamber for the generation of hot gas; at least one water flow channel for the flow of water to be heated; and two metal walls delimiting the water flow channel. The two metal walls are provided for exchanging heat between the hot gas and water flowing through the water flow channel. The at least one water flow channel is provided for water flow in counter direction to the flow of hot gas. The at least one water flow channel comprises a number of consecutive parallel straight segments. Two consecutive parallel straight segments are separated by an intermediate wall and by a U- turn. The intermediate wall connects the two metal walls. Each U-turn comprises an upstream section and a downstream section. The upstream section and the downstream section each are a 90° segment of the U-turn. At least one of the U-turns - named the first U-turn - comprises a through opening for the removal after casting of the sand core for forming the water channel in metal casting. The number "first" in "first U-turn" does not refer to a numerical order of U-turns in the water channel. The through opening is fully comprised in the upstream section of the first U-turn. Preferably, the through opening is a cylindrical opening.
[4] The cast element of the invention has the benefit that the sand of the sand core providing the water channel during metal casting can be more easily removed after casting, while a water channel is obtained that allows efficient water flow as required for optimum operation of the heat exchanger. Another benefit is that quality of casting can be more easily inspected after removal of the sand core.
[5] Preferably, the cast element is provided out of aluminum or out of an aluminum alloy. Preferably, the through cylindrical opening is provided parallel with the two consecutive parallel straight segments separated by the first U-turn
Preferably, the intermediate wall separating two consecutive parallel straight segments of the water flow channel is a metal wall common to the two consecutive parallel straight segments.
Preferably, the downstream section of the first U-turn comprises a curved baffle parallel with and corresponding with the contour of the wall of the downstream section of the first U-turn. Even more preferably, the curved baffle follows the full length of the contour of the downstream section of the first U-turn.
Preferably, the upstream section of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U-turn. More preferably, the upstream section of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U-turn that follows the full length of the contour of the upstream section of the first U-turn.
Preferably, the upstream section of the first U-turn comprises reinforcing pins extending between and connecting the two metal walls delimiting the water channel. Preferably, the reinforcing pins have a circular cross section. The reinforcing pins in the upstream section of the first U-turn can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
Preferably, the downstream section of the first U-turn comprises reinforcing pins extending between and connecting the two metal walls delimiting the water channel. The reinforcing pins in the downstream section of the first U-turn can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
In a preferred cast element, the two consecutive parallel straight segments are separated by an intermediate wall and by a first U-turn each comprising reinforcing pins extending from and connecting the two metal walls delimiting the water channel. The reinforcing pins in the parallel straight segments can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
In a preferred cast element, the water channel comprises a second U-turn in water flow direction downstream from the first U-turn. The numeral "second" is used to differentiate the second U-turn from the first U-turn; and does not refer to a numerical order of U-turns in the water channel. The first U-turn and the second U-turn are connected by a common straight segment of the water channel. The second U-turn comprises a through opening - preferably a cylindrical through opening - for the removal after casting of the sand core for forming the water channel in metal casting. The through opening is fully provided in the upstream section or in the downstream section of the second U-turn. Preferably, the through opening in the second U-turn is provided parallel with the two consecutive parallel straight segments separated by the second U-turn. Preferably, the through opening of the second U-turn is fully provided in the upstream section of the second U- turn. Such embodiments have the particular benefit that the sand core for building the water channel can be effectively removed, after metal casting, out of the upstream straight segment leading to the first U-turn and out of the common straight segment connecting the first U-turn with the second U-turn. Sand in the upstream straight segment leading to the first U-turn can be very effectively removed through the through opening in the first U-turn. Sand in the straight segment downstream from the first U-turn - which is the common straight segment with and leading to the second U-turn - can be very effectively removed through the through opening in the second U-turn. After removal of the sand core, the water channels can be inspected more easily.
[14] Preferably, the cast element is provided as a section for parallel side by side assembly in a sectional heat exchanger.
[15] The second aspect of the invention is a heat exchanger element comprising a cast
element as in any embodiment of the first aspect of the invention. The through opening or through openings is or are closed by a plug inserted in the cylindrical opening. Preferably, the plugs are screwed into the cylindrical openings. More preferably, a sealing agent is provided between the plug and the cylindrical opening. As an alternative to screwing plugs into the through opening, plugs can be pressed into the through opening in order to close the through opening.
[16] The third aspect of the invention is a sectional heat exchanger. The sectional heat
exchanger comprises a plurality of cast elements as in any embodiment of the first aspect of the invention. The cast elements are assembled side by side such that the at least one water channels of each of the cast elements are connected in parallel flow connection. Preferably, the through openings are closed by a plug inserted in the cylindrical opening. More preferably, the plugs are screwed into the cylindrical openings. More preferably, a sealing agent is provided between the plug and the cylindrical opening. As an alternative to screwing plugs into the through opening, plugs can be pressed into the through opening in order to close the through opening.
[17] A preferred sectional heat exchanger comprises a combustion chamber for the
generation of flue gas. Preferably, the combustion chamber of the sectional heat exchanger is provided by the combination of the combustion chambers of the cast elements.
[18] The fourth aspect of the invention is a heat cell comprising a sectional heat exchanger as in the third aspect of the invention. A burner; preferably a fully premixed surface stabilized premix gas burner, is provided in the combustion chamber of the sectional heat exchanger for the generation of hot gas.
Brief Description of the Drawings
[19] Figure 1 shows a cast element for a heat exchanger according to the invention.
Figure 2 shows a detail of a U-turn of the heat exchanger according to the invention. Mode(s) for Carrying Out the Invention
[20] Figure 1 shows a cast element 100 for a heat exchanger according to the invention. The cast element can be used as a section for parallel side by side assembly in a sectional heat exchanger. The cast element 100 comprises a combustion chamber 102 for the generation of hot gas; a water flow channel 104 for the flow of water to be heated; and (not shown in figure 1 ) two metal walls delimiting the water flow channel. The metal walls are provided for exchanging heat between the hot gas and water flowing through the water flow channel. The water flow channel is provided for water flow in counter direction to the flow of hot gas, via a water entrance 106 and a hot water exit 108.
[21] The water flow channel comprises a number of consecutive parallel straight segments 1 10. Two consecutive parallel straight segments are separated by an intermediate wall 1 12 extending from and connecting the two metal walls; and by a U-turn 1 14. Each U-turn comprises - in water flow direction - an upstream section 1 16 and a downstream section 1 18. The upstream section and the downstream section each are a 90° segment of the U- turn. Figure 2 shows a detail of this U-turn, indicating the upstream section 1 16 and the downstream section 1 18 that each are a 90° segment of the U-turn, as indicated by the dotted lines 190, 192. A first U-turn 1 14 comprises a through opening 120 for the removal after casting of the sand core for forming the water channel in metal casting. The through opening 120 is fully comprised in the upstream section of the first U-turn 1 14.
[22] The downstream section 1 18 of the first U-turn 1 14 comprises a curved baffle 122 parallel with and corresponding with the contour of the wall of downstream section of the first U- turn. The curved baffle 122 follows the full length of the contour of the downstream section of the first U-turn. The upstream section 1 16 of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U- turn. The curved baffle extends between and connects the two metal cast walls delimiting the water channel.
[23] The upstream section 1 16 of the first U-turn comprises reinforcing pins 126 extending between and connecting the two metal walls of the water channel. The downstream section of the first U-turn comprises reinforcing pins 128 extending between and connecting the two metal walls delimiting the water channel. The reinforcing pins in the upstream section of the first U-turn as well as in the downstream section of the first U-turn have a drop shaped cross section. The drop shape is aligned with the flow direction of the water in the water channel. The two consecutive parallel straight segments separated by an intermediate wall and by the first U-turn each comprise reinforcing pins 130 extending between and connecting the two metal walls delimiting the water channel. The reinforcing pins 130 have a drop shaped cross section. The drop shape is aligned with the flow direction of the water in the straight segments of the water channel.
[24] The water channel of the cast element comprises a second U-turn 142 downstream from the first U-turn 1 14. The first U-turn 1 14 and the second U-turn 142 are connected by a common straight segment 144 of the water channel. The second U-turn 142 comprises a through opening 146 for the removal after casting of the sand core for forming the water channel in metal casting. The through opening is fully provided in the upstream section of the second U-turn.
For use in a heat cell, the through openings have to be closed. This can be done by means of plugs that are screwed into the through openings. To this end, the opening and the plug comprise engaging screw thread. Preferably, sealing agent is applied in the through opening when screwing the plug into the through opening to ensure that no water will leak through. Alternatively, the plug can be pressed into the through opening in which a sealing agent is provided. As an alternative to screwing plugs into the through opening, plugs can be pressed into the through opening in order to close the through opening.

Claims

Claims
1. Cast element for a heat exchanger, wherein the cast element comprises
- a combustion chamber for the generation of hot gas;
- at least one water flow channel for the flow of water to be heated; and
- two metal walls delimiting the water flow channel, for exchanging heat between the hot gas and water flowing through the water flow channel;
wherein the at least one water flow channel is provided for water flow in counter direction to the flow of hot gas;
wherein the at least one water flow channel comprises a number of consecutive parallel straight segments,
wherein two consecutive parallel straight segments are separated by an intermediate wall and by a U-turn;
wherein each U-turn comprises an upstream section and a downstream section; wherein the upstream section and the downstream section each are a 90° segment of the U-turn;
wherein at least one of the U-turns - named the first U-turn - comprises a through opening for the removal after casting of the sand core for forming the water channel in metal casting; characterized in that the through opening is fully comprised in the upstream section of the first U-turn.
2. Cast element as in claim 1 , wherein the downstream section of the first U-turn comprises a curved baffle parallel with and corresponding with the contour of the wall of the downstream section of the first U-turn, preferably the curved baffle follows the full length of the contour of the downstream section of the first U-turn.
3. Cast element as in any of the claims 1 or 2, wherein the upstream section of the first U-turn does not comprise a curved baffle parallel with and corresponding with the contour of the wall of the first U-turn.
4. Cast element as in any of the claims 1 - 3, wherein the upstream section of the first U-turn comprises reinforcing pins extending between and connecting the two metal walls delimiting the water channel.
5. Cast element as in any of the preceding claims, wherein the downstream section of the first U- turn comprises reinforcing pins extending between and connecting the two metal walls delimiting the water channel.
6. Cast element as in any of the preceding claims, wherein the two consecutive parallel straight segments separated by an intermediate wall and by a first U-turn each comprise reinforcing pins extending between and connecting the two metal walls delimiting the water channel.
7. Cast element as in any of the preceding claims,
wherein the water channel comprises a second U-turn downstream from the first U-turn;
wherein the first U-turn and the second U-turn are connected by a common straight segment of the water channel; wherein the second U-turn comprises a through opening for the removal after casting of the sand core for forming the water channel in metal casting;
wherein the through opening is fully provided in the upstream section or in the downstream section of the second U-turn.
8. Cast element as in claim 7;
wherein the through opening of the second U-turn is fully provided in the upstream section of the second U-turn.
Cast element as in any of the preceding claims, wherein the cast element is provided as a section for parallel side by side assembly in a sectional heat exchanger.
9. Heat exchanger element, wherein the heat exchanger element comprises a cast element as in any of the preceding claims, and wherein the through opening or through openings is or are closed by a plug inserted in the cylindrical opening.
10. Sectional heat exchanger;
wherein the sectional heat exchanger comprises a plurality of cast elements as in any of the claims 1 - 9;
wherein the cast elements are assembled side by side such that the at least one water channel of each of the cast elements are connected in parallel flow connection.
1 1. Sectional heat exchanger as in claim 10; comprising a combustion chamber for the generation of flue gas.
12. Heat cell, wherein the heat cell comprises a sectional heat exchanger as in claim 1 1 and
wherein a burner is provided in the combustion chamber of the sectional heat exchanger for the generation of hot gas.
PCT/EP2018/068025 2017-07-07 2018-07-04 Cast element for a heat exchanger WO2019008005A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17180243 2017-07-07
EP17180243.2 2017-07-07

Publications (1)

Publication Number Publication Date
WO2019008005A1 true WO2019008005A1 (en) 2019-01-10

Family

ID=59298365

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/068025 WO2019008005A1 (en) 2017-07-07 2018-07-04 Cast element for a heat exchanger

Country Status (1)

Country Link
WO (1) WO2019008005A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287142A2 (en) * 1987-03-18 1988-10-19 Radson B.V. A boiler element
EP1530009A2 (en) * 2003-11-08 2005-05-11 BBT Thermotechnik GmbH Heat exchanger
EP1669689A2 (en) 2004-12-08 2006-06-14 Robert Bosch Gmbh Heat exchanger
EP2486995A1 (en) * 2011-02-09 2012-08-15 Gerardus Eliza Henricus Beckers Cast light metal products, such as a heat exchanger, with casting hole plugs, plug and method for manufacturing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287142A2 (en) * 1987-03-18 1988-10-19 Radson B.V. A boiler element
EP1530009A2 (en) * 2003-11-08 2005-05-11 BBT Thermotechnik GmbH Heat exchanger
EP1669689A2 (en) 2004-12-08 2006-06-14 Robert Bosch Gmbh Heat exchanger
EP2486995A1 (en) * 2011-02-09 2012-08-15 Gerardus Eliza Henricus Beckers Cast light metal products, such as a heat exchanger, with casting hole plugs, plug and method for manufacturing the same

Similar Documents

Publication Publication Date Title
TWI641757B (en) Combustor panel, combustor, combustion apparatus, gas turbine, and cooling method for the combustor panel
DE502007005333D1 (en) Heat exchanger for cooling cracked gas
CN102620580B (en) Heat exchanger
JP2011506896A (en) Recirculation exhaust gas cooler for internal combustion engines
US9927146B2 (en) Heat exchanger
US10222126B2 (en) Condensation heat exchanger having dummy pipe
JP7006310B2 (en) Heat exchanger and heat source machine
RU2011109082A (en) SECTIONAL HEATING BOILER FROM IRON OR ALUMINUM
WO2019008005A1 (en) Cast element for a heat exchanger
CA2261322A1 (en) Supply device for gas appliance manifold
US6494031B2 (en) Gas turbine apparatus with heat exchanger
US3451472A (en) Two-stage baffle for high pressure feedwater heaters
JP2008008568A (en) Heat exchanger
DE19644707C2 (en) Exhaust pipe system for a multi-cylinder piston internal combustion engine
CN206247305U (en) The protection sleeve pipe and high temperature waste hot boiler of waste heat boiler
BR112017026081B1 (en) EXHAUST MANIFOLD
WO2019073584A1 (en) Compressor housing and turbocharger provided with said compressor housing
TWI831812B (en) Cooling box for a shaft furnace
CN106796093A (en) The TEMA type BFU special devices of real adverse current
WO2018072608A1 (en) Sealing apparatus for combustion chamber of heat exchanger
JP2009281703A (en) Heat exchanger
RU2256127C1 (en) Hot-water boiler
JP2009097839A (en) Heat exchanger
CN211218600U (en) Double-cooling nozzle backwashing device
CN217423237U (en) Gas heater two draw and penetrate side's pipe and combustor and water heater

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18743415

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18743415

Country of ref document: EP

Kind code of ref document: A1