US3835648A - Heater for hot-gas engine - Google Patents

Heater for hot-gas engine Download PDF

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Publication number
US3835648A
US3835648A US00308766A US30876672A US3835648A US 3835648 A US3835648 A US 3835648A US 00308766 A US00308766 A US 00308766A US 30876672 A US30876672 A US 30876672A US 3835648 A US3835648 A US 3835648A
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US
United States
Prior art keywords
pipes
pipe
heater
temperature
hot
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.)
Expired - Lifetime
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US00308766A
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English (en)
Inventor
A Nederlof
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US Philips Corp
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US Philips Corp
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Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3835648A publication Critical patent/US3835648A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/057—Regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/055—Heaters or coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
    • F02G2243/02—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having pistons and displacers in the same cylinder
    • F02G2243/04—Crank-connecting-rod drives
    • F02G2243/08—External regenerators, e.g. "Rankine Napier" engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2255/00—Heater tubes

Definitions

  • Hot-gas engines of the present type are known, for example, from Dutch Pat. Nos. 82,253 and 99,795 and British Pat. No. 1,053,052.
  • the heater consists of a number of circular pipes of the same diameter.
  • the combustion gases flow around the heater pipes while giving off thermal energy through the walls of the pipes to the working medium of the engine flowing through said pipes, said medium performing a thermodynamic cycle in a closed working space of the engine. Since the pipes which are arranged in a circle have the same wall thicknesses and diameters and the same passages are present between the pipes, a heater transfer occurs which is uniformly divided between the various pipes and is substantially the same for each pipe. All heater pipes are substantially at the same temperature.
  • thermocouples For control purposes (control air/fuel ratio; power control etc.) the temperature of the working medium in the heater pipes often serves as a parameter.
  • temperature-sensitive elements for example thermocouples, are provided in one or more heater pipes.
  • the hot-gas engine according to the invention is characterized in that at least one pipe is present which, at least over a part of its longitudinal dimension, is wider in a radial direction of the circle than the remaining pipes.
  • the passage (hydraulic diameter) of said pipe is larger than that of the remaining pipes.
  • the enlargement of the passage provides an extra space in which the temperaturesensitive element can be accommodated so that after assembly of said element the remaining passage (hydraulic diameter) corresponds to that of the remaining pipes.
  • the pipe can remain arranged on the common circle while maintaining the passage between said pipe and the adjacent pipes which is equal to the passage between the remaining pipes mutually.
  • the heat transfer for the widened pipe then is substantially identical to that for the remaining pipes.
  • the widened pipe can be maintained on the common circle while maintaining the passages between the pipes which are the same everywhere, the upper end of the widened pipe, in the cases in which all the upper ends of the pipes open into an annular duct (British Pat. No. 1,053,052; Dutch Pat. No. 99,975) remains opening into the same place in said annular duct.
  • the advantage thereof is that the annular duct need not be constructed unnecessarily wide.
  • the construction according to the invention on the contrary can be made in a simple and inexpensive manner, for example, by starting from a circular pipe of a larger diameter which is flattened in one direction in such manner that a pipe width is obtained which is equal to the diameter of the remaining pipes. Widening of the pipe in the direction at right angles to the direction of flattening then automatically occurs.
  • FIG. 1a is a sectional elevation view of the new invention.
  • FIG. lb is a partial sectional view taken along lines Iblb of FIG. la.
  • DESCRIPTION OF THE PREFERRED EMBODIMENT 3 is present a compression space 6 which communicates with an expansion space above the displacer via a cooler 7, a regenerator 8 and a heater 9.
  • the heater 9 is formed by a row of pipes arranged in a circle around a space 11 for combustion gases. Furthermore are present a burner 12 and an inlet 13 for air of combustion, as well as an outlet 14 for combustion gases.
  • the heater 9 consists of a number of first pipes 15 which communicate at one end with the regenerator 8 and at the other end open into an annular duct 16 and a number of second pipes 17 alternating with the first pipes 15 and communicating the annular duct 16 with the expansion space 10. In order to avoid complexity of the drawing, only two sets of first and second pipes are shown.
  • the hot combustion gases originating from burner 12 and inlet 13 flow past the first pipes 15 and second pipes 17, while giving off thermal energy to said pipes, and leave the engine via outlet 14.
  • FIG. 1b which is a crosssectional view taken on the line lblb of FIG. la of a few of the pipes arranged on a common circle of radius R, the pipes have equal wall thicknesses and equal widths in tangential direction of the circle while furthermore they are arranged so that the same passages are present between the pipes mutually,
  • the central pipe 15 is widened in the radial direction of the circle relative to the other pipes. Consequently, said pipe has a larger hydraulic diameter.
  • the extra space resulting from the widening is now available for accommodating one or more temperature-sensitive elements, for example thermocouples.
  • a passage remains in the widened pipe which is equal to the passage of the remaining pipes. Since the central pipe 15 has a width in the tangential direction of the circle equal to the diameter of the remaining pipes, the combustion gases from the space 11 flow against substantially the same pipe surface area so that the heat transfer for said central pipe 15 is substantially the same as that in the remaining pipes.
  • a symmetric arrangement of the pipes with equal passages between the pipes is also maintained.
  • the central pipe 15 Since the central pipe 15 is arranged on the common circle, it opens in the annular duct 16 on the upper side so that this requires no special structural measures to communicate said pipe with the said duct.
  • the temperature signal supplied by a temperature-sensitive element inside the central pipe 15 actually represents a temperature which also prevails in the remaining heater pipes.
  • a hot-gas engine including an expansion space. and a burner with a corresponding combustion space for combustion gases
  • the improvement in combination therewith of a heater comprising at least one row of pipes which communicate with the expansion space.
  • said pipes positioned generally parallel and spaced apart with the center lines of the pipes located on a common circle, the pipes having substantially equal diameters in the tangential direction of the circle with equal spaces in said tangential direction between said pipes, said pipes having substantially equal wall thickness, and at least one of said pipes having width in the radial direction greater than the other pipes.
  • Apparatus according to claim 1 further comprising temperature-sensing means in the bore of said pipe with greater radial width. wherein said bore with said temperature-sensing means therein has an effective hydraulic radius for gas flow therethrough substantially the same as the hydraulic radii of the bores of the re maining pipes.
  • thermocouple

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Spray-Type Burners (AREA)
US00308766A 1971-12-11 1972-11-22 Heater for hot-gas engine Expired - Lifetime US3835648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7117032A NL7117032A (enrdf_load_stackoverflow) 1971-12-11 1971-12-11

Publications (1)

Publication Number Publication Date
US3835648A true US3835648A (en) 1974-09-17

Family

ID=19814673

Family Applications (1)

Application Number Title Priority Date Filing Date
US00308766A Expired - Lifetime US3835648A (en) 1971-12-11 1972-11-22 Heater for hot-gas engine

Country Status (8)

Country Link
US (1) US3835648A (enrdf_load_stackoverflow)
JP (1) JPS4865333A (enrdf_load_stackoverflow)
CA (1) CA967011A (enrdf_load_stackoverflow)
DE (1) DE2258869C3 (enrdf_load_stackoverflow)
FR (1) FR2164360A5 (enrdf_load_stackoverflow)
GB (1) GB1410229A (enrdf_load_stackoverflow)
NL (1) NL7117032A (enrdf_load_stackoverflow)
SE (1) SE382094B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951414A1 (de) * 1978-12-21 1980-07-10 United Stirling Ab & Co Temperaturfuehler fuer einen heizkopf eines heissgasmotors
US20060093977A1 (en) * 2003-07-01 2006-05-04 Pellizzari Roberto O Recuperator and combustor for use in external combustion engines and system for generating power employing same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539944A (en) * 1976-07-16 1978-01-28 United Stirling Ab & Co Heater head for heat gas engine
DE202008002466U1 (de) * 2008-02-21 2008-05-29 Pasemann, Lutz, Dr. Stirlingmotor-Erhitzer aus einem Bündel strukturierter Röhren
DE202008010349U1 (de) * 2008-08-04 2008-10-23 Pasemann, Lutz, Dr. Stirlingmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1785662A (en) * 1928-05-09 1930-12-16 Waterloo Paul George Temperature-indicating device
US3456438A (en) * 1966-10-04 1969-07-22 Philips Corp Thermodynamic engine
US3780584A (en) * 1971-07-30 1973-12-25 Foster Wheeler Corp Erosion resistent sensing device
US3782120A (en) * 1971-03-04 1974-01-01 Philips Corp Thermodynamic reciprocating machine with temperature-controlled fuel supply to burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1785662A (en) * 1928-05-09 1930-12-16 Waterloo Paul George Temperature-indicating device
US3456438A (en) * 1966-10-04 1969-07-22 Philips Corp Thermodynamic engine
US3782120A (en) * 1971-03-04 1974-01-01 Philips Corp Thermodynamic reciprocating machine with temperature-controlled fuel supply to burner
US3780584A (en) * 1971-07-30 1973-12-25 Foster Wheeler Corp Erosion resistent sensing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951414A1 (de) * 1978-12-21 1980-07-10 United Stirling Ab & Co Temperaturfuehler fuer einen heizkopf eines heissgasmotors
US20060093977A1 (en) * 2003-07-01 2006-05-04 Pellizzari Roberto O Recuperator and combustor for use in external combustion engines and system for generating power employing same

Also Published As

Publication number Publication date
SE382094B (sv) 1976-01-12
CA967011A (en) 1975-05-06
FR2164360A5 (enrdf_load_stackoverflow) 1973-07-27
DE2258869A1 (de) 1973-06-14
JPS4865333A (enrdf_load_stackoverflow) 1973-09-08
DE2258869B2 (de) 1978-12-07
GB1410229A (en) 1975-10-15
DE2258869C3 (de) 1979-08-16
NL7117032A (enrdf_load_stackoverflow) 1973-06-13

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