CA2470739A1 - Generation of electricity in a fireplace using thermoelectric module - Google Patents
Generation of electricity in a fireplace using thermoelectric module Download PDFInfo
- Publication number
- CA2470739A1 CA2470739A1 CA002470739A CA2470739A CA2470739A1 CA 2470739 A1 CA2470739 A1 CA 2470739A1 CA 002470739 A CA002470739 A CA 002470739A CA 2470739 A CA2470739 A CA 2470739A CA 2470739 A1 CA2470739 A1 CA 2470739A1
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- Canada
- Prior art keywords
- combustion chamber
- thermoelectric module
- fireplace
- thermoelectric
- enclosure
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/191—Component parts; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/185—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
- F24B1/187—Condition responsive controls for regulating combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2900/00—Special features of, or arrangements for combustion chambers
- F23M2900/13003—Energy recovery by thermoelectric elements, e.g. by Peltier/Seebeck effect, arranged in the combustion plant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention generally relates to a use of a thermoelectric module in conjunction with a fireplace or stove to generate electricity to run certain features or peripheral devices related to the stove or fireplace. The thermoelectrical module may be positioned between interior and exterior walls of the stove or fireplace outside and protected from the fire generated in the combustion chamber of the stove or fireplace. Power generated by the thermoelectric module may be used for various purposes such as powering a blower, a control unit such as a microprocessor, lights, back-up systems, ignition systems, and flame control devices. Furthermore, the power generated by the thermoelectric module may be saved in a power storage device such as a rechargeable battery or capacitor for a later use by various devices associated with fireplace or stove.
Description
GENERATIOiIf OF ELECTRICI~."S~' TN A. FIREPI~,ACE USING
THERMOELECTRIC MODUJLE
l3ack~round of the )rnvenfion Technical Field The present invention generally relates to the.Ynaoelectric power and more specifically relates to generation of electric power for a frrepiace using thermoelectric power.
Related Art 10 The popularity of gas burning stoves and fireplaces has increased s ~Qnificantly over the past several decades. Burning gas such as natural gas or propane is typically a much more efficient way of producing heat and far more clean and easy to control than burning wood, wood pellets, coal or oil: The efficiency and convenience of gas bumina stoves and fireplaces is further enhanced by using such 15 peripheral devices as a blower to circulate heated air through the room in which the.
stove ox fireplace is placed, an ignition system to self start the fire, back-up storage devices, and control systems that automatically or manually control various features of the stave or fireplace. Many of these devices require electrical power to operate and thus contribute to the cost of operating a gas stove or fireplace.
Furthermore, in 20 areas where electrical power is unavailable or expensive, many of these devices may not be an option for use with a gas stove or fireplace.
Many known stoves and fireplaces have reduced heat generating efficiency because much of the heat produced escapes through the combustion exhaust system or into the structure suzrounding the stove or fireplace rather than 25 heating the intended air space around the stove or fireplace. . Tmprovvig the heat generatixtg efficiency of stoves and fireplaces is an objective for many manufacturers of These products.
The use of therrnoeleetzic modules to produce electricity using a heat source has been known for many years. Fire 1 schematically illustrates a typical 30 thermoelectric module 1 that includes a number of alternate negative (NJ
and positive (l.') type semiconductor thermo elements connected in series by metal interconnectozs 2, 4 that are sandwiched between two electrically insulated but thermally conducting plates H, C. A heat source connected to plate H and a heat sink conaiected to plate C provide a temperature differential across the tYtermo 35 elements that in turn geizerat.e a current (1~ that can be delivered to an external load Typically, increasing the temperature difference {c~T) across a thermoelectric module will increase the power generated by the module within limits of the materials used and the con$o ration of the module. Those skilled in the art are aware that materials with a high figure-of merit are preferred for use as thermo elements in a thermoelectric module. Heavily doped .semi-conductors, such as tellurides of antimony and bismuth, are examples ofrnaterials with a high figure-of merit value. Manufacturers of thermoelectric modules such as continue to make advances in the efficiency of thermoelectric modules 'by altering their designs or discovering near materials or combinations ofmaterials that are most efficient.
Summary of the Inveutxoz~
The present invention generally relates to the use of a thennoelectzic 10 ~ module in conjunction with a fireplace or stove to generate electzicity to run certain features or peripheral devices related to the stove or fireplace. A
thermoelectric module may be positioned adjacent to an exterior wall of the stove or fireplace or between interior and exterior walls of the stove or fireplace so long as the module is protected from the fire in the combustion cha.rrzber. F~ower generated by the 15 thermoelectric module nay be used for various purposes such as powering a blowez, a control unit, lights, sensors, ignition systems, and flame igniting aztd control devices. Furthermore, the power generated by the thermoelectric module may be saved in a power storage device such as a rechargeable battery or capacitor for a later use by devices listed above.
20 One aspect of the invention relates to a thermoelectric fireplace that includes a combustion chamber enclosure having an outer surface and an inner surface defining a combustion. chamber, an outer enclosure surrounding a portion of the combustion chamber enclosure, and a thex~a.oelectric module positioned adjacent to the outer surface of the combustian chamber enclosure. In one embodiment, the 25 thermoelectric also may be positioned between the combustion chamber enclosure and the outer enclosure. Heat generated in the combustion chamber in the combustion chamber enclosure is used by the thermoelectric module to generate power.
Another aspect of the invention relates'to a thermoelectric system 30 configured to generate power in a ~lreplace. The thermoelectric system includes a combustion chamber enclosure and an outer enclosure. The thermoelectric system includes a thermoelectzic module positioned adjacent to the combustion chamber ene.losure and positioned between the combustion chamber enclosure and the outer enclosure. The thermoelectric module generates power using heal provided in the 35 combustion chamber enclosure.
A fuzther aspect of the invention relates to a method of generating power in a fireplace using a thermoelectric system that includes a thezmoelectzic module. The fireplace includes a combustion cbamber enclosure having inner and outer surfaces and an outer enclosure surrounding the combustion chamber enclosure. The method includes positioning the thermoelectric module adjacent to the outer surface of the combustion chamber enclosure between the combustion > chamber enclosure and the outer enclosure, heating the combustion chamber enclosure, transferring heat from the combustion chamber enclosure to the thermoelectric module, and generating power in the thermoelectric module from the transferred heat.
A yet further aspect of the invention relates to a thexznoelectric fireplace that includes a compression molded combustion chamber enclosure defining a corxlbustion chamber, and a thermoelectric module positioned adjacent to the combustion chamber enclosure. The thermoelectric module is positione3 relative co the combustion chamber enclosure so that heat generated in the combustion chamber is transferred to the thermoelectric module for the produetian of power.
The above summary o f tha present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. Figures in the detailed description that follow more particularly exemplified embodiments of the invention. While certain embodiments will be illustrated and described, the invention is not limited to use in such embodiments.
Brief bescription of the Dratyinas The invention may be more completely understood in consideration of the following detailed description of various embodiments in the invention and in connection with accompanying drawings, in which;
Figure 1 is a schematic representation of a known power generating thermoelectric module;
Figure 2 is a perspective view of an example fireplace in which principles of the present invention may be applied;
Figure 3 is a perspective side view of the fireplace shown in Figure 2 with a porfion of the fireplace outer enclosure removed to illustrate an exaruple thermoelectric module and other aspects of the invention;
F ~aure 4 is a crass-sectional view of one example embodiment of the invention taken along cross-sectional indicators 4-4 shown in Figure 3;
Figuxe 5 is a cross-sectional view of another example embodiment of the invention taken along cross-sectional indicators 5-5 shown in Figure 3;
Figure 6 is a top perspective view of an example therxnaelectric module of the invention in use with a compression rnalded combustion chamber enclosure; and Figure 7 is a cross-sectional side view of another example 5 embodiment of the invention with a heat source positioned in the fireplace plenuni.
While the invention is amenable to various modifications and alternate forms, specifics thereof have been shown by uray of example in the drawings and will he described in detail. It should be understood, however, that the invention is not limited to the pazticular embodiments described. On the contrary, 10 the invention is to cover all modi$cations, equivalents, and alternatives falling within the spirit and scope of the invention.
Detailed Descnintion of the Prefierred Emhodirnent The invention is applicable to stoves and fireplaces that provide a heat source, and particularly to combustible gas fireplaces and stoves. The invention IS is directed to generating electrical power from heat provided by a stove or fireplace using a thermoelectric device. Power generated by the thermoelectric device may be used to power various features associated with the stove ar fireplace. While the present invention is not se limited, apprzciation of various aspects of the invention vriIl he gained through a discussion of the examples provided below.
20 Embodiments of the present invention may be used in conjunction with gas, electric or other types of heat sources that generate heat to provide a temperature differential across a thermoelectric module thereby generating electric power. bVhile the example embodiments of the present invention provided below are described in conjunction with example ~~replae.c.s, the present invention is 25 equally applicable to other systems or apparatuses such as furnaces and stoves that generate heat for the purpose of heating an air space such as a home or commercial building. Some example fizeplaces that may be used in accordance with the present invention include a direct vent, a universal vent, a B-vent, a horizontaJlvertical-vent, a dual direct vent, and a multisided unit having twe~ or three glass panels as 30 combustion chamber side panels.
As used herein, the phrase "combustion chamber enclosure" may include any structure that at least partially encloses a space in which a flame is generated from combusting a material, solid or gas, or simulating a flame. The phrase "transferring heat" may include either convretion or conduction heat transfez.
35 A "thermoelectric module" as used herein urill be more completely described below but generally relates to a device that generates electrical power in the presence of a temperature differential. A "heat source" may include, for example, an electric or gas heater.
Referring to Figures 2-5, respective front, side and cross-sectional views of an example eznbodime.nt of a fireplace 10 is shown. Fireplace 10 includes 5 an outer enclosure 11, a combustion chamber enclosure 30, and a thermoelectric system 50. Outer enclosure I 1 includes top, bottom, first and second side, and rear panels 12, I4, 16, 18, 20. Outer enclosure 11 may also ixiclude a front suzface 22 into which first and second vents 23, 24 are formed. Vents 23, 24 are used to draw air into and exhausting air from the internal space of fireplace 10.
10 Combustion chamber enclosure 30 iucludes fizst and second side panels 31, 47, top and bottom panels 35, 39, and rear panel 43. As shown in Figures 3-5, first panel 31 includes outside and inside surfaces 32, 34, top panel 3~
includes inside and outside surfaces 36, 38, bottom panel 39 includes inside an,d outside surfaces 40, 42, and rear panel 43 includes an outside surface 44.
IS Thermoelectric system 50 may include a thermoelectric module 52, heat sink 58 and leads 60, 62. Thermoelectric module 52 may include the basic con$guration shown in Figure 1, including a plurality of therma elements P, N
connected in series with connectors 2, 4 and positioned between heat conductive plates H, C. Other thermoelectric module configurations may be used sa long as the 20 thermoelectzic module 52 is capable of using heat to generate electrical power. feat sink 58 may be configured as a plurality of ribs as shown in Figure 3, or other stntctures that enhances heat dissipation to increase the temperature differential between opposing sides of thermoelectric module 52.
Tn another thermoelectric system embodiment shoran in Figure 5, a 25 portion of the system, such as a hear sink 158, may extend beyond the f rst side panel 16 and possibly even beyond an additional wall structure 80 positioned adj scent the fireplace 14. Heat sink 158 may then be exposed to a colder environment than that area between the combustion chamber enclosure 30 and the outer enclosure 11. For example, heat sink 158 may extend outside of a house 30 where the fireplace resides so as to be exposed to cool/cold outdoor air.
Such a configuration would create a much greater temperature differential across the thermoelectric module resulting in improved power output.
Figures 3-4 illustrate thermoelectric system 50 mounted to outside surface 32 of first side panel 31 of the combustion chamber enclosure 30.
35 Thermoelectric system 50 is orientated ~,vith the thermoelectric module 52 secured to the combustion chamber enclosure 30 with dze heat sink 158 positioned away from the combustion chamber enclosure, fi5ure 4 iIlustxates the entire thermoelectric system 50 positioned between combustion chamber enclosure 30 and the first side panel 16 and a removable side panel 28 of outer enclosure 11. Similarly, Figure 5 illustrates that at least aportion of the thermoelectric system I50 is positioned between combustion chamber enclosure 30 and outer enclosure 11. In other embodiments, the thezznoelectric system may be mounted to the outside surfaces of 5 the top, bottom, rear or second side panels 35, 39, 43, 47 of combustion chamber enclosure 30 for various reasons such as, for example, improving power generation efficiency or meeting the size and shape constraints of the fireplace.
Fireplace 10 may include auxiliary features that typically operate using electrical power. For example, fireplace 10 includes an energy storage device.
10 70, a blower 72, a control unit 74, arid an ignition system 26 (see Figure 1). Energy storage device 70 may be, for example, a capacitor or rechargeable battery.
Preferably, energy storage device 70 is capable of being charged wish power from thermoelectric system 50 so that some of the fireplace features can operate when there fireplace is not generating heat sufficient for the thermoelectric system to 15 produce power.
Blower 72 provides air circulation around the outside surface of combustion chamber 30 and within outer enclosure 11. Blower 72 typically draws cool air in through the lower first vent 23 and exhausts heated air through the higher second vent 24 on the front surface 22 of fireplace 10. In some embodiments, 20 blower 72 may be configured solely for the purpose of cooling thermoelectric module 52 while a separate blower is used to circulate air into and out of the fireplace.
Control unit 74 may individually control or may represent any of a number of different coatrol features that may be used with a fireplace. For example, 25 control unit 74 may be an ignition system control such as the ignition system disclosed in U.S. Patant No, 6,520,199, a main flame valve control, a heat sensor control, a blower control, or a power allocation control unit. Control unit 74 may include a microprocessor that is programmable to, for example, automatically charge or discharge energy storage device 70, turn on or offblower 72 at specified times 30 during heating and cooling within combustion enclosure 30, automatically fuming on or off the main flame of the fireplace, maintaining the ignition system 26, or manually igniting a pilot light of the fireplace (not shown}.
Figure 3 illusurates hard wires extending betareen control unit 74, blower 72 and energy storage device 70. I-iovc°ever, in other embodiments, other 35 communication technology such as infrared, remote control or other wireless communication may be used to send and receive control signals from the control unit 74 and various electronically controlled devices of fireplace 10_ The thermoelectric systems 50, 150 shown in Figures 3-5 may more efficiently generate power when blower 72 moves air across heat sink 58, 1S8 to increase the temperature differential across thermoelectric module 52, 15~. In these examples, blower 72 draws cool air in the direction B across a bottom portion of the 5 combustion chamber enclosure 30, moves the alt in the vertical direction S
across the thermoelectric system 50, ISO, and exhausts the air out from the fireplace the intended air space in front of the fireplace. Typically, the exhausted air is heated relative to the intake air by the time the air is exhausted from the fireplace, thus providing heating of the intended air space while at the same time cooling the I0 thermoelectric module. In other embodiments, different types of cooling devices may be used in place of or in addition to a blower to cool the thermoelectric system.
One example alternative cooling device is a closed-loop liquid-state cooling system.
Power generation using thermoelectric system 50 znay be started in several different ways. Heat is generated in the combustion chamber enclosure I S using, for example, a gas fed flame, or may be generated by anotb.er heat source positioned between the combustion chamber enclosure 30 and the outer enclosure 28. The flame may be staved with the ignition system. 26 that includes, for example, a standing pilot light or a pilot light that that is manually ox automatically controlled by control unit 74 using power powered stored in energy stora?e device 70. As heat 20 builds in or around the combustion chamber, the thermoelectric module 52 begins to draw heat from the heat source and converts that heat into electrical power.
Control unit 74 may be used to power "on" the blower 72 either before ar afrer the thermoelectric system 50 begins to generate electrical power by using energy stored in. the storage device 70 or using energy produced by thermoelectric system S0. As 25 noted above, blowing aiur across the heat sink 58 (for example, using blower 72) improves the power ~utput from the thermoelectric system, and thus it may be advantageous to begin air movement across the heat sink at a very early stage.
In some eznbod3ments, energy storage device 70 may include a capacitor that provides a surge of power to meet the start up energy requirements for blower 72.
30 Power generated by the themnoelectric system 50 may be used for powering other features not shown in the Figures such as, for example, lights in and around the fireplace, moving devices in and around the fireplace such as an simulated ~.arxte element (see U.S. Patent Application No. 09/941,400), a simulated fuel bed {see U.S. patent Application. No. 09/851,803), an ember out of a log (see 35 U.S. Patent Application I~To. 1014&3,175), a touch switch (see U.S. patent Application No. I0/199,983), a proximity sensor (see U.S. Patent Application Nos.
10/120,890 and 101119,474), moving a lenticular screen (see U.S. Patent Application No. 09/859,X9), a thermostat, and other alarms arid sensors such as a carbon y mono~:ide sensor and an associated alarm. Another sensor and alarm system may monztor the thermoelectric system and provide notification when the thermoelectric system is overheating or is in need ofrepairs so that the user or possibly the control unit can shut down the fireplace to conduct diagnostics andlor repairs.
Another example fireplace 200 that includes a thezxnoelectric system 250 is shown in Figure 6. Fireplace 200 includes a combustion chamber enclosure 230 having an outer surface 232 and an inner surface 234 that def nes a combustion chamber 229. Thermoelectric system 250 nrlay be mounted to or otherwise positioned adjacent to outer surface 232 so that therrnoelectric system 250 can use heat from combustion chamber 229 to generated power. Combustion chamber enclosure 230 may include inorganic fibers, binders and fillers, and may be made by a compression molding method to provide a compression molded article as disclosed in U.S. Patent Application Publication No. 200310049575 Al.
Thermoelectric system 250 may include the same or similar features as disclosed above, including a thermoelectric modu.Ie 252, a heat si~~ 258, a control system (not shown), a power storage device (not shown), and a blower (noi shown).
In a yet further example fizeplace 300 shown in Figure 7, a heat source S1 that generates a temperature differential isi the thermoelectric system 50 may be positioned between the combustion chamber enclosure 30 and the outer enclosure 28 of the fireplace 300. For example, an. electric heater and at least a portion of the thermoelectric module 52 of the thermoelectric system maybe positioned between the combustion chamber enclosure and the outer enclosure.
One example thermoelectric system for a fireplace produces a DC
voltage of about 5 to 1S Y and is capable of grovidi:ng current of about 250 to 1.000 m.P~.. The amount of voltage produced has a roughly inverse relationship to the amount of current tlxat can be drawn from the system. In one particular example, the system provides a DC voltage of about 13 'V and a currant of about S00 mA.
Tlte current and voltage specifications for a thermoelect~zc module may also vary depending on whether the thertno elements are arranged in series or in parallel.
The thermoelectric system preferably includes two or more thermo elements or thermo plates connected in series or in parallel. One example thermoelectric system that provides sufficient power to run a blower and ether basic electronic features for a standard residential gas firepIaee includes five thermo plate cox3nected in series, such as thermoelectric module Model No. T208119-02 made.
by Tellurex Corporation of Traverse City, ?vLT, U.S.A.
The present invention should not be considered limited to the particular exarngles or materials described above, but rather should be understood to cover all aspects of the invention as fairly set out in the attached claims.
Various modifications, equivalent processes, as well as numerous stntctures to which the present invention may be applicable will be readily apparent to those of skill in the art to which the present invention is directed upon review of the instant specification.
THERMOELECTRIC MODUJLE
l3ack~round of the )rnvenfion Technical Field The present invention generally relates to the.Ynaoelectric power and more specifically relates to generation of electric power for a frrepiace using thermoelectric power.
Related Art 10 The popularity of gas burning stoves and fireplaces has increased s ~Qnificantly over the past several decades. Burning gas such as natural gas or propane is typically a much more efficient way of producing heat and far more clean and easy to control than burning wood, wood pellets, coal or oil: The efficiency and convenience of gas bumina stoves and fireplaces is further enhanced by using such 15 peripheral devices as a blower to circulate heated air through the room in which the.
stove ox fireplace is placed, an ignition system to self start the fire, back-up storage devices, and control systems that automatically or manually control various features of the stave or fireplace. Many of these devices require electrical power to operate and thus contribute to the cost of operating a gas stove or fireplace.
Furthermore, in 20 areas where electrical power is unavailable or expensive, many of these devices may not be an option for use with a gas stove or fireplace.
Many known stoves and fireplaces have reduced heat generating efficiency because much of the heat produced escapes through the combustion exhaust system or into the structure suzrounding the stove or fireplace rather than 25 heating the intended air space around the stove or fireplace. . Tmprovvig the heat generatixtg efficiency of stoves and fireplaces is an objective for many manufacturers of These products.
The use of therrnoeleetzic modules to produce electricity using a heat source has been known for many years. Fire 1 schematically illustrates a typical 30 thermoelectric module 1 that includes a number of alternate negative (NJ
and positive (l.') type semiconductor thermo elements connected in series by metal interconnectozs 2, 4 that are sandwiched between two electrically insulated but thermally conducting plates H, C. A heat source connected to plate H and a heat sink conaiected to plate C provide a temperature differential across the tYtermo 35 elements that in turn geizerat.e a current (1~ that can be delivered to an external load Typically, increasing the temperature difference {c~T) across a thermoelectric module will increase the power generated by the module within limits of the materials used and the con$o ration of the module. Those skilled in the art are aware that materials with a high figure-of merit are preferred for use as thermo elements in a thermoelectric module. Heavily doped .semi-conductors, such as tellurides of antimony and bismuth, are examples ofrnaterials with a high figure-of merit value. Manufacturers of thermoelectric modules such as continue to make advances in the efficiency of thermoelectric modules 'by altering their designs or discovering near materials or combinations ofmaterials that are most efficient.
Summary of the Inveutxoz~
The present invention generally relates to the use of a thennoelectzic 10 ~ module in conjunction with a fireplace or stove to generate electzicity to run certain features or peripheral devices related to the stove or fireplace. A
thermoelectric module may be positioned adjacent to an exterior wall of the stove or fireplace or between interior and exterior walls of the stove or fireplace so long as the module is protected from the fire in the combustion cha.rrzber. F~ower generated by the 15 thermoelectric module nay be used for various purposes such as powering a blowez, a control unit, lights, sensors, ignition systems, and flame igniting aztd control devices. Furthermore, the power generated by the thermoelectric module may be saved in a power storage device such as a rechargeable battery or capacitor for a later use by devices listed above.
20 One aspect of the invention relates to a thermoelectric fireplace that includes a combustion chamber enclosure having an outer surface and an inner surface defining a combustion. chamber, an outer enclosure surrounding a portion of the combustion chamber enclosure, and a thex~a.oelectric module positioned adjacent to the outer surface of the combustian chamber enclosure. In one embodiment, the 25 thermoelectric also may be positioned between the combustion chamber enclosure and the outer enclosure. Heat generated in the combustion chamber in the combustion chamber enclosure is used by the thermoelectric module to generate power.
Another aspect of the invention relates'to a thermoelectric system 30 configured to generate power in a ~lreplace. The thermoelectric system includes a combustion chamber enclosure and an outer enclosure. The thermoelectric system includes a thermoelectzic module positioned adjacent to the combustion chamber ene.losure and positioned between the combustion chamber enclosure and the outer enclosure. The thermoelectric module generates power using heal provided in the 35 combustion chamber enclosure.
A fuzther aspect of the invention relates to a method of generating power in a fireplace using a thermoelectric system that includes a thezmoelectzic module. The fireplace includes a combustion cbamber enclosure having inner and outer surfaces and an outer enclosure surrounding the combustion chamber enclosure. The method includes positioning the thermoelectric module adjacent to the outer surface of the combustion chamber enclosure between the combustion > chamber enclosure and the outer enclosure, heating the combustion chamber enclosure, transferring heat from the combustion chamber enclosure to the thermoelectric module, and generating power in the thermoelectric module from the transferred heat.
A yet further aspect of the invention relates to a thexznoelectric fireplace that includes a compression molded combustion chamber enclosure defining a corxlbustion chamber, and a thermoelectric module positioned adjacent to the combustion chamber enclosure. The thermoelectric module is positione3 relative co the combustion chamber enclosure so that heat generated in the combustion chamber is transferred to the thermoelectric module for the produetian of power.
The above summary o f tha present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. Figures in the detailed description that follow more particularly exemplified embodiments of the invention. While certain embodiments will be illustrated and described, the invention is not limited to use in such embodiments.
Brief bescription of the Dratyinas The invention may be more completely understood in consideration of the following detailed description of various embodiments in the invention and in connection with accompanying drawings, in which;
Figure 1 is a schematic representation of a known power generating thermoelectric module;
Figure 2 is a perspective view of an example fireplace in which principles of the present invention may be applied;
Figure 3 is a perspective side view of the fireplace shown in Figure 2 with a porfion of the fireplace outer enclosure removed to illustrate an exaruple thermoelectric module and other aspects of the invention;
F ~aure 4 is a crass-sectional view of one example embodiment of the invention taken along cross-sectional indicators 4-4 shown in Figure 3;
Figuxe 5 is a cross-sectional view of another example embodiment of the invention taken along cross-sectional indicators 5-5 shown in Figure 3;
Figure 6 is a top perspective view of an example therxnaelectric module of the invention in use with a compression rnalded combustion chamber enclosure; and Figure 7 is a cross-sectional side view of another example 5 embodiment of the invention with a heat source positioned in the fireplace plenuni.
While the invention is amenable to various modifications and alternate forms, specifics thereof have been shown by uray of example in the drawings and will he described in detail. It should be understood, however, that the invention is not limited to the pazticular embodiments described. On the contrary, 10 the invention is to cover all modi$cations, equivalents, and alternatives falling within the spirit and scope of the invention.
Detailed Descnintion of the Prefierred Emhodirnent The invention is applicable to stoves and fireplaces that provide a heat source, and particularly to combustible gas fireplaces and stoves. The invention IS is directed to generating electrical power from heat provided by a stove or fireplace using a thermoelectric device. Power generated by the thermoelectric device may be used to power various features associated with the stove ar fireplace. While the present invention is not se limited, apprzciation of various aspects of the invention vriIl he gained through a discussion of the examples provided below.
20 Embodiments of the present invention may be used in conjunction with gas, electric or other types of heat sources that generate heat to provide a temperature differential across a thermoelectric module thereby generating electric power. bVhile the example embodiments of the present invention provided below are described in conjunction with example ~~replae.c.s, the present invention is 25 equally applicable to other systems or apparatuses such as furnaces and stoves that generate heat for the purpose of heating an air space such as a home or commercial building. Some example fizeplaces that may be used in accordance with the present invention include a direct vent, a universal vent, a B-vent, a horizontaJlvertical-vent, a dual direct vent, and a multisided unit having twe~ or three glass panels as 30 combustion chamber side panels.
As used herein, the phrase "combustion chamber enclosure" may include any structure that at least partially encloses a space in which a flame is generated from combusting a material, solid or gas, or simulating a flame. The phrase "transferring heat" may include either convretion or conduction heat transfez.
35 A "thermoelectric module" as used herein urill be more completely described below but generally relates to a device that generates electrical power in the presence of a temperature differential. A "heat source" may include, for example, an electric or gas heater.
Referring to Figures 2-5, respective front, side and cross-sectional views of an example eznbodime.nt of a fireplace 10 is shown. Fireplace 10 includes 5 an outer enclosure 11, a combustion chamber enclosure 30, and a thermoelectric system 50. Outer enclosure I 1 includes top, bottom, first and second side, and rear panels 12, I4, 16, 18, 20. Outer enclosure 11 may also ixiclude a front suzface 22 into which first and second vents 23, 24 are formed. Vents 23, 24 are used to draw air into and exhausting air from the internal space of fireplace 10.
10 Combustion chamber enclosure 30 iucludes fizst and second side panels 31, 47, top and bottom panels 35, 39, and rear panel 43. As shown in Figures 3-5, first panel 31 includes outside and inside surfaces 32, 34, top panel 3~
includes inside and outside surfaces 36, 38, bottom panel 39 includes inside an,d outside surfaces 40, 42, and rear panel 43 includes an outside surface 44.
IS Thermoelectric system 50 may include a thermoelectric module 52, heat sink 58 and leads 60, 62. Thermoelectric module 52 may include the basic con$guration shown in Figure 1, including a plurality of therma elements P, N
connected in series with connectors 2, 4 and positioned between heat conductive plates H, C. Other thermoelectric module configurations may be used sa long as the 20 thermoelectzic module 52 is capable of using heat to generate electrical power. feat sink 58 may be configured as a plurality of ribs as shown in Figure 3, or other stntctures that enhances heat dissipation to increase the temperature differential between opposing sides of thermoelectric module 52.
Tn another thermoelectric system embodiment shoran in Figure 5, a 25 portion of the system, such as a hear sink 158, may extend beyond the f rst side panel 16 and possibly even beyond an additional wall structure 80 positioned adj scent the fireplace 14. Heat sink 158 may then be exposed to a colder environment than that area between the combustion chamber enclosure 30 and the outer enclosure 11. For example, heat sink 158 may extend outside of a house 30 where the fireplace resides so as to be exposed to cool/cold outdoor air.
Such a configuration would create a much greater temperature differential across the thermoelectric module resulting in improved power output.
Figures 3-4 illustrate thermoelectric system 50 mounted to outside surface 32 of first side panel 31 of the combustion chamber enclosure 30.
35 Thermoelectric system 50 is orientated ~,vith the thermoelectric module 52 secured to the combustion chamber enclosure 30 with dze heat sink 158 positioned away from the combustion chamber enclosure, fi5ure 4 iIlustxates the entire thermoelectric system 50 positioned between combustion chamber enclosure 30 and the first side panel 16 and a removable side panel 28 of outer enclosure 11. Similarly, Figure 5 illustrates that at least aportion of the thermoelectric system I50 is positioned between combustion chamber enclosure 30 and outer enclosure 11. In other embodiments, the thezznoelectric system may be mounted to the outside surfaces of 5 the top, bottom, rear or second side panels 35, 39, 43, 47 of combustion chamber enclosure 30 for various reasons such as, for example, improving power generation efficiency or meeting the size and shape constraints of the fireplace.
Fireplace 10 may include auxiliary features that typically operate using electrical power. For example, fireplace 10 includes an energy storage device.
10 70, a blower 72, a control unit 74, arid an ignition system 26 (see Figure 1). Energy storage device 70 may be, for example, a capacitor or rechargeable battery.
Preferably, energy storage device 70 is capable of being charged wish power from thermoelectric system 50 so that some of the fireplace features can operate when there fireplace is not generating heat sufficient for the thermoelectric system to 15 produce power.
Blower 72 provides air circulation around the outside surface of combustion chamber 30 and within outer enclosure 11. Blower 72 typically draws cool air in through the lower first vent 23 and exhausts heated air through the higher second vent 24 on the front surface 22 of fireplace 10. In some embodiments, 20 blower 72 may be configured solely for the purpose of cooling thermoelectric module 52 while a separate blower is used to circulate air into and out of the fireplace.
Control unit 74 may individually control or may represent any of a number of different coatrol features that may be used with a fireplace. For example, 25 control unit 74 may be an ignition system control such as the ignition system disclosed in U.S. Patant No, 6,520,199, a main flame valve control, a heat sensor control, a blower control, or a power allocation control unit. Control unit 74 may include a microprocessor that is programmable to, for example, automatically charge or discharge energy storage device 70, turn on or offblower 72 at specified times 30 during heating and cooling within combustion enclosure 30, automatically fuming on or off the main flame of the fireplace, maintaining the ignition system 26, or manually igniting a pilot light of the fireplace (not shown}.
Figure 3 illusurates hard wires extending betareen control unit 74, blower 72 and energy storage device 70. I-iovc°ever, in other embodiments, other 35 communication technology such as infrared, remote control or other wireless communication may be used to send and receive control signals from the control unit 74 and various electronically controlled devices of fireplace 10_ The thermoelectric systems 50, 150 shown in Figures 3-5 may more efficiently generate power when blower 72 moves air across heat sink 58, 1S8 to increase the temperature differential across thermoelectric module 52, 15~. In these examples, blower 72 draws cool air in the direction B across a bottom portion of the 5 combustion chamber enclosure 30, moves the alt in the vertical direction S
across the thermoelectric system 50, ISO, and exhausts the air out from the fireplace the intended air space in front of the fireplace. Typically, the exhausted air is heated relative to the intake air by the time the air is exhausted from the fireplace, thus providing heating of the intended air space while at the same time cooling the I0 thermoelectric module. In other embodiments, different types of cooling devices may be used in place of or in addition to a blower to cool the thermoelectric system.
One example alternative cooling device is a closed-loop liquid-state cooling system.
Power generation using thermoelectric system 50 znay be started in several different ways. Heat is generated in the combustion chamber enclosure I S using, for example, a gas fed flame, or may be generated by anotb.er heat source positioned between the combustion chamber enclosure 30 and the outer enclosure 28. The flame may be staved with the ignition system. 26 that includes, for example, a standing pilot light or a pilot light that that is manually ox automatically controlled by control unit 74 using power powered stored in energy stora?e device 70. As heat 20 builds in or around the combustion chamber, the thermoelectric module 52 begins to draw heat from the heat source and converts that heat into electrical power.
Control unit 74 may be used to power "on" the blower 72 either before ar afrer the thermoelectric system 50 begins to generate electrical power by using energy stored in. the storage device 70 or using energy produced by thermoelectric system S0. As 25 noted above, blowing aiur across the heat sink 58 (for example, using blower 72) improves the power ~utput from the thermoelectric system, and thus it may be advantageous to begin air movement across the heat sink at a very early stage.
In some eznbod3ments, energy storage device 70 may include a capacitor that provides a surge of power to meet the start up energy requirements for blower 72.
30 Power generated by the themnoelectric system 50 may be used for powering other features not shown in the Figures such as, for example, lights in and around the fireplace, moving devices in and around the fireplace such as an simulated ~.arxte element (see U.S. Patent Application No. 09/941,400), a simulated fuel bed {see U.S. patent Application. No. 09/851,803), an ember out of a log (see 35 U.S. Patent Application I~To. 1014&3,175), a touch switch (see U.S. patent Application No. I0/199,983), a proximity sensor (see U.S. Patent Application Nos.
10/120,890 and 101119,474), moving a lenticular screen (see U.S. Patent Application No. 09/859,X9), a thermostat, and other alarms arid sensors such as a carbon y mono~:ide sensor and an associated alarm. Another sensor and alarm system may monztor the thermoelectric system and provide notification when the thermoelectric system is overheating or is in need ofrepairs so that the user or possibly the control unit can shut down the fireplace to conduct diagnostics andlor repairs.
Another example fireplace 200 that includes a thezxnoelectric system 250 is shown in Figure 6. Fireplace 200 includes a combustion chamber enclosure 230 having an outer surface 232 and an inner surface 234 that def nes a combustion chamber 229. Thermoelectric system 250 nrlay be mounted to or otherwise positioned adjacent to outer surface 232 so that therrnoelectric system 250 can use heat from combustion chamber 229 to generated power. Combustion chamber enclosure 230 may include inorganic fibers, binders and fillers, and may be made by a compression molding method to provide a compression molded article as disclosed in U.S. Patent Application Publication No. 200310049575 Al.
Thermoelectric system 250 may include the same or similar features as disclosed above, including a thermoelectric modu.Ie 252, a heat si~~ 258, a control system (not shown), a power storage device (not shown), and a blower (noi shown).
In a yet further example fizeplace 300 shown in Figure 7, a heat source S1 that generates a temperature differential isi the thermoelectric system 50 may be positioned between the combustion chamber enclosure 30 and the outer enclosure 28 of the fireplace 300. For example, an. electric heater and at least a portion of the thermoelectric module 52 of the thermoelectric system maybe positioned between the combustion chamber enclosure and the outer enclosure.
One example thermoelectric system for a fireplace produces a DC
voltage of about 5 to 1S Y and is capable of grovidi:ng current of about 250 to 1.000 m.P~.. The amount of voltage produced has a roughly inverse relationship to the amount of current tlxat can be drawn from the system. In one particular example, the system provides a DC voltage of about 13 'V and a currant of about S00 mA.
Tlte current and voltage specifications for a thermoelect~zc module may also vary depending on whether the thertno elements are arranged in series or in parallel.
The thermoelectric system preferably includes two or more thermo elements or thermo plates connected in series or in parallel. One example thermoelectric system that provides sufficient power to run a blower and ether basic electronic features for a standard residential gas firepIaee includes five thermo plate cox3nected in series, such as thermoelectric module Model No. T208119-02 made.
by Tellurex Corporation of Traverse City, ?vLT, U.S.A.
The present invention should not be considered limited to the particular exarngles or materials described above, but rather should be understood to cover all aspects of the invention as fairly set out in the attached claims.
Various modifications, equivalent processes, as well as numerous stntctures to which the present invention may be applicable will be readily apparent to those of skill in the art to which the present invention is directed upon review of the instant specification.
Claims (33)
1. A method of generating power in a fireplace using a thermoelectric system that includes a thermoelectric module, the fireplace including a combustion chamber enclosure having inner and outer surfaces and an outer enclosure surrounding the combustion chamber enclosure, the method comprising the steps of:
positioning the thermoelectric module adjacent to the outer surface of the combustion chamber enclosure between the combustion chamber enclosure and the outer enclosure;
heating the combustion chamber enclosure;
transferring heat from the combustion chamber enclosure to the thermoelectric module; and generating power in the thermoelectric module from the transferred heat.
positioning the thermoelectric module adjacent to the outer surface of the combustion chamber enclosure between the combustion chamber enclosure and the outer enclosure;
heating the combustion chamber enclosure;
transferring heat from the combustion chamber enclosure to the thermoelectric module; and generating power in the thermoelectric module from the transferred heat.
2. The method of claim 1, wherein the thermoelectric system further includes an energy storage device, and the method further comprises storing power from the generating step in the energy storage device.
3. The method of claim 1, wherein the thermoelectric system further includes a cooling device, and the method further comprises powering the cooling device with power from the generating step.
4. The method of claim 3, wherein the thermoelectric module includes a first side secured to the outer surface of the combustion chamber enclosure and a second side configured as a heat sink, and the method further comprises moving coolant across the heat sink with the cooling device.
5. The method of claim 1, wherein the positioning step includes positioning the thermoelectric module adjacent to a vertically extending wall of the combustion chamber enclosure.
6. The method of claim 5, further comprising drawing cool air from under a bottom side of the combustion chamber enclosure and moving the drawn air across the thermoelectric module.
7. The method of claim 1, further including positioning a portion of the thermoelectric module outside of the outer enclosure.
8. The method of claim 1, further comprising drawing air through a first fireplace vent, moving the drawn air across the thermoelectric module to cool a portion of the thermoelectric module, and exhausting the drawn air through a second fireplace vent.
9. The method of claim 1, wherein the thermoelectric system further includes a control unit, and the method further comprises controlling distribution of power in the thermoelectric system with the control unit.
10. The method of claim 9, wherein the controlling step includes powering a blower.
11. The method of claim 9, wherein the controlling step includes storing power in an energy storage device.
12. The method of claim 9, wherein the controlling step includes powering a pilot flame system.
13. The method of claim 9, wherein the controlling step includes opening and closing a main flame valve of the fireplace.
14. The method of claim 9, wherein the controlling step includes powering an electric light.
15. The method of claim 9, wherein the controlling step includes powering a filtration system.
16. The method of claim 9, wherein the controlling step includes powering a touch switch.
17. A thermoelectric system configured to generate power in a fireplace, the fireplace including a combustion chamber enclosure and an outer enclosure, the thermoelectric system comprising:
a thermoelectric module positioned adjacent to the combustion chamber enclosure and positioned between the combustion chamber enclosure and the outer enclosure;
whereby the thermoelectric module generates power from heat provided in the combustion chamber enclosure.
a thermoelectric module positioned adjacent to the combustion chamber enclosure and positioned between the combustion chamber enclosure and the outer enclosure;
whereby the thermoelectric module generates power from heat provided in the combustion chamber enclosure.
18. The system of claim 17, further comprising a cooling device configured to create a temperature gradient in the thermoelectric module.
19. The system of claim 17, wherein the cooling device is a blower.
20. The system of claim 17, further comprising a control system configure to control power distribution in the system.
21. The system of claim 17, further comprising a power storage device configured to store power generated by the thermoelectric module.
22. The system of claim 21, wherein the power storage device is a rechargeable battery.
23. The system of claim 21, wherein the power storage device include a capacitor and a battery.
24. The system of claim 17, wherein the thermoelectric module includes a heat sink.
25. The system of claim 17, wherein the thermoelectric module includes at least two thermoelectric plates.
26. A thermoelectric fireplace, comprising:
a combustion chamber enclosure having an inner surface defining a combustion chamber and an outer surface;
an outer enclosure surrounding a portion of the combustion chamber enclosure; and a thermoelectric module positioned adjacent to the outer surface of the combustion chamber enclosure and positioned between the outer surface of the combustion chamber enclosure and the outer enclosure;
whereby heat generated in the combustion chamber is used by the thermoelectric module to generate power.
a combustion chamber enclosure having an inner surface defining a combustion chamber and an outer surface;
an outer enclosure surrounding a portion of the combustion chamber enclosure; and a thermoelectric module positioned adjacent to the outer surface of the combustion chamber enclosure and positioned between the outer surface of the combustion chamber enclosure and the outer enclosure;
whereby heat generated in the combustion chamber is used by the thermoelectric module to generate power.
27. The fireplace of claim 26, wherein the combustion chamber enclosure includes top, bottom, rear, first side and second side panels, and the thermoelectric module is positioned adjacent to the outer surface of at least one of the panels of the combustion chamber enclosure.
28. The fireplace of claim. 26, further comprising an ignition system operable using power at least partially provided by the thermoelectric module.
29. The fireplace of claim 26, wherein the thermoelectric module produces at least 5V DC voltage.
30. A thermoelectric fireplace, comprising:
a compression molded combustion chamber enclosure defining a combustion chamber; and a thermoelectric module positioned adjacent to the combustion chamber enclosure, whereby heat generated in. the combustion chamber is used by the thermoelectric module to generate power.
a compression molded combustion chamber enclosure defining a combustion chamber; and a thermoelectric module positioned adjacent to the combustion chamber enclosure, whereby heat generated in. the combustion chamber is used by the thermoelectric module to generate power.
31. The fireplace of claim 30, wherein combustion chamber enclosure comprises an inorganic fiber and a binder.
32. The fireplace of claim 31, wherein the combustion chamber enclosure includes an inner surface defining the combustion chamber and an outer surface, and the thermoelectric module is positioned adjacent to the outer surface.
33. A thermoelectric fireplace, comprising:
a combustion chamber enclosure;
an outer enclosure surrounding a portion of the combustion chamber enclosure; and a thermoelectric module positioned between the combustion chamber enclosure and the outer enclosure; and a heat source positioned between the combustion chamber enclosure and the outer enclosure;
whereby heat generated by the heat source is used by the thermoelectric module to generate power.
a combustion chamber enclosure;
an outer enclosure surrounding a portion of the combustion chamber enclosure; and a thermoelectric module positioned between the combustion chamber enclosure and the outer enclosure; and a heat source positioned between the combustion chamber enclosure and the outer enclosure;
whereby heat generated by the heat source is used by the thermoelectric module to generate power.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/642,055 US20050037303A1 (en) | 2003-08-15 | 2003-08-15 | Generation of electricity in a fireplace using thermoelectric module |
| US10/642,055 | 2003-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2470739A1 true CA2470739A1 (en) | 2005-02-15 |
Family
ID=34136517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002470739A Abandoned CA2470739A1 (en) | 2003-08-15 | 2004-06-11 | Generation of electricity in a fireplace using thermoelectric module |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20050037303A1 (en) |
| CA (1) | CA2470739A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD616977S1 (en) | 2008-12-03 | 2010-06-01 | Twin-Star International Inc. | Fireplace insert |
| US7826727B2 (en) | 2006-05-05 | 2010-11-02 | Twin-Star International, Inc. | Electric fireplace |
| USD668748S1 (en) | 2009-07-07 | 2012-10-09 | Twin-Star International, Inc. | Electric fireplace |
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| US8863736B2 (en) | 1999-12-06 | 2014-10-21 | Enerco Group, Inc. | Gas-fired heater with environmental detector |
| ES2287436T3 (en) * | 2002-11-13 | 2007-12-16 | Coprecitec, S.L. | THERMOELECTRIC GENERATOR GROUP WITH A PILOT BURNER. |
| KR101423479B1 (en) * | 2006-06-26 | 2014-07-28 | 코닌클리케 필립스 엔.브이. | A solid fuel stove with improved combustion |
| US20080245352A1 (en) * | 2007-03-14 | 2008-10-09 | Caframo Limited | Thermo-electric generator for use with a stove |
| US20100005730A1 (en) * | 2008-07-11 | 2010-01-14 | Kuo Liang Weng | Building energy storage and conversion apparatus |
| WO2010026266A1 (en) * | 2008-09-08 | 2010-03-11 | Bhp Billiton Aluminium Technologies Limited | Thermoelectric device |
| US8851062B2 (en) | 2008-10-07 | 2014-10-07 | Biolite, LLC | Portable combustion device utilizing thermoelectrical generation |
| US8297271B2 (en) * | 2008-10-07 | 2012-10-30 | Biolite Llc | Portable combustion device utilizing thermoelectrical generation |
| CN102353096A (en) * | 2011-10-27 | 2012-02-15 | 宁波丽辰电器有限公司 | Wall furnace with generating set |
| USD773994S1 (en) | 2014-01-21 | 2016-12-13 | Biolite, LLC | Packable electric generator |
| USD777667S1 (en) | 2014-01-21 | 2017-01-31 | Biolite Llc | Portable combustion device utilizing thermoelectrical generation |
| WO2015112606A1 (en) | 2014-01-21 | 2015-07-30 | Biolite Llc | Portable combustion device utilizing thermoelectrical generatiion |
| CN104061600A (en) * | 2014-05-28 | 2014-09-24 | 苏州塞贝克电子科技有限公司 | Power generation firewood stove |
| US9920930B2 (en) * | 2015-04-17 | 2018-03-20 | Honeywell International Inc. | Thermopile assembly with heat sink |
| AT517642B1 (en) * | 2015-09-02 | 2018-07-15 | Primetals Technologies Austria GmbH | Blast furnace with energy self-sufficient observation of carbon injection |
| FR3041418B1 (en) * | 2015-09-23 | 2017-11-17 | Commissariat Energie Atomique | SYSTEM FOR COLLECTING HEAT FROM A FUMISTERY DUCT WITH A CHANNEL OF THE FLOW OF A HEAT TRANSFER |
| US20210222882A1 (en) * | 2020-01-20 | 2021-07-22 | Dustin Johnson | Thermally powered fan assembly |
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| US2647505A (en) * | 1952-06-23 | 1953-08-04 | Us Army | Thermoelectric space heater |
| US4651019A (en) * | 1984-11-16 | 1987-03-17 | Pennsylvania Power & Light Company | Dual fueled thermoelectric generator |
| US5038924A (en) * | 1990-10-09 | 1991-08-13 | Richwood Industries, Inc. | Impact saddle for conveyor belts |
| CA2103734C (en) * | 1993-08-10 | 2003-07-08 | Randall Hillis Reid | Self-powered heat transfer fan |
| US5448109B1 (en) * | 1994-03-08 | 1997-10-07 | Tellurex Corp | Thermoelectric module |
| DE19949601A1 (en) * | 1999-10-14 | 2001-04-19 | Bsh Bosch Siemens Hausgeraete | Gas cooker |
| US7098269B2 (en) * | 2001-02-08 | 2006-08-29 | Hon Technology Inc. | Compression molded inorganic fiber articles, and methods and compositions used in molding same |
| US6282906B1 (en) * | 2000-03-10 | 2001-09-04 | Tellurex Corporation | Mobile vehicle temperature controlled compartment |
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| US6588419B1 (en) * | 2002-06-10 | 2003-07-08 | Honeywell International Inc. | Fireplace insert thermally generating electrical power useful for operating a circulating fan |
| US6701874B1 (en) * | 2003-03-05 | 2004-03-09 | Honeywell International Inc. | Method and apparatus for thermal powered control |
| US6920377B2 (en) * | 2003-07-28 | 2005-07-19 | Honeywell International Inc. | Self-sustaining control for a heating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7826727B2 (en) | 2006-05-05 | 2010-11-02 | Twin-Star International, Inc. | Electric fireplace |
| USD616977S1 (en) | 2008-12-03 | 2010-06-01 | Twin-Star International Inc. | Fireplace insert |
| USD668748S1 (en) | 2009-07-07 | 2012-10-09 | Twin-Star International, Inc. | Electric fireplace |
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|---|---|
| US20050037303A1 (en) | 2005-02-17 |
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