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US3662739A - Heater system - Google Patents

Heater system Download PDF

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Publication number
US3662739A
US3662739A US860521A US3662739DA US3662739A US 3662739 A US3662739 A US 3662739A US 860521 A US860521 A US 860521A US 3662739D A US3662739D A US 3662739DA US 3662739 A US3662739 A US 3662739A
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United States
Prior art keywords
valve
reaction vessel
regulating
duct
oxidant
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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
Application number
US860521A
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English (en)
Inventor
Johann Schroder
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US Philips Corp
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US Philips Corp
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Publication date
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/008—Feed or outlet control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
    • F24V30/00—Apparatus or devices using heat produced by exothermal chemical reactions other than combustion

Definitions

  • ABSTRACT A heater system comprising a reaction vessel containing a mixture of metals which is melted during operation, an oxidant container, at least one duct with outlet member for communicating the oxidant to the reaction vessel for an exothermic reaction therein with the metal mixture, and a container having an inert gas which communicates via a regulating valve with the duct between the oxidant container and the reaction vessel; the outlet member is readily cooled and manufactured from a material which is not or substantially not wetted by the liquid in the reaction vessel.
  • the invention relates to a heater system, particularly for the supply of heat to a heat exchanger in which a medium flows.
  • the system comprises a reaction vessel containing a metal or a mixture of metals which is liquid at the operating temperature, a first container containing an oxidizing agent which is capable of reacting chemically with the liquid in the reaction vessel while evolving heat in such manner that the reaction products are solid and/or liquid at the temperature and pressure prevailing in the reaction vessel.
  • This vessel communicates through a duct including a regulating valve, with at least one supply duct communicating with the reaction vessel; the system furthermore comprises a second container containing a gas which is chemically inert with the liquid in the reaction vessel and with the oxidant, the second container communicating also with the supply duct through a duct comprising a regulating valve.
  • Heater systems of the type to which the present invention relates are known and have the advantage that they can supply heat independently of the surroundings in which they are arranged. In other words, said heater systems supply heat without consuming air of combustion and without giving off gases of combustion. So they are excellently suitable for use in those places where pollution of air by gases of combustion is sought to be avoided or is prohibited.
  • Such heater systems can be used in all devices in which heat is required, and may serve, for example, for supplying heat to engines in which a working medium traverses a thermodynamic cycle between an expansion space which is at a high temperature and a compression space which is at a low temperature examples being gas turbine systems and hot gas engines.
  • the supply of heat from the heater system to the engine or turbine may take place by conveying liquid in the reaction vessel to the heater which usually is 'a pipe heater through which the working medium flows.
  • the heat transfer from the reaction vessel to the heater may also take place by means of a heat transporting medium, for example, liquid NaK, which circulates in a system of ducts which at one end is in heat exchanging relationship with the reaction vessel and at the other end with the heater.
  • the metal or mixture of metals in the reaction vessel may be constituted by one or more of the metals Li, Ca, Na, K, Mg, Al and/or one or more of the rare earth metals. These metals, and particularly combinations thereof, have the advantage of a comparatively low melting temperature and a large evolution of heat per unit by volume. 7
  • An oxidant such as a halogen or ahalogen compound, particularly fluorine or a fluorine compound may be used.
  • the oxidant is supplied to the reaction vessel in dosed quantities in which the oxidant reacts chemically, while evolving heat, with the liquid metal. In this casesalts are formed which are solid and/or liquid.
  • a difficulty is that at the temperature of approximately 800 C prevailing during operation in the reaction vessel, all the construction materials to be considered for the reaction vessel and the supply ducts, react with the oxidant which results in disturbances.
  • the object of the invention to provide a solution to this problem, and the invention is based on the recognition of the fact that (a) contact between oxidant and vessel walls is to be avoided as much as possible, while (b) those parts such as the supply ducts which necessarily have to contact the oxidant are kept at such a low temperature that no reaction occurs between the oxidant, and saidparts.
  • the heater system has the end of the supply duct facing the reaction vessel communicating with one end of a duct in a cooled, readily heat-conducting block of material; the other end of said duct comprises an outlet member which is secured in said duct and makes a good thermal contact with the block of said material.
  • This member is manufactured-from or provided with a superficial layer of a material which is not or substantially not wetted by the liquid in the reaction vessel; the block of material is incorporated in an aperture of the wall of the reaction vessel with the interposition of a heat insulator.
  • This passage of the outlet member and the pressure of the oxidant and the gas in the supply duct are furthermore chosen such that the rate of flow of the oxidant or the gas in the outlet member is larger than the reaction speed of the oxidant with the metal or mixture of metals in the reaction vessel. With this arrangement the metal cannot penetrate into the outlet member.
  • the temperature thereof is kept low (a) by the cooling, which may be water cooling, and (b) by the rapid flow of the oxidant and the gas, which also provides cooling so that the oxidant does not react with the material thereof.
  • the rapid flow of the oxidant and the gas has the further result that the oxidant is injected in the metal melt, so that it substantially does not contact the hot walls of the reaction vessel.
  • the fast-flowing mixture of oxidant and inert gas ensures that the metal cannot penetrate into the supply duct where it would solidify and thus clog the passage.
  • the outlet member is manufactured from or provided with a superficial layer of one of the metals tungsten, molybdenum or tantalum or one or more of the carbides or borides of said metals. These materials have the property that they are substantially not wetted by liquid Li and Ca and their salts.
  • a filter element such as a gauze, is arranged in the duct in the block of material or in the supply duct; this gauze has duct passages and mesh widths, respectively, of a smaller dimension than the passage of the outlet member.
  • a further embodiment of the heater system according tot the invention is characterized in that a regulating device is present with which the regulating valves in the ducts of the first and the second container communicating with each of the supply ducts can be controlled in such manner that upon closing the regulating valve in the duct communicating with the first container, the regulating valve in the duct communicating with the second container is opened for a moment and is then immediately closed, a bypass with a narrow passage being arranged across said latter valve so that a constant flow of inert gas flows from the second container to the reaction vessel.
  • the valve in the inert gas supply duct is opened for a moment when the oxidant suppletion valve is closed. As a result of this a large flow of inert gas will be supplied for a moment, which forces the oxidant at a large speed out of the supply duct and the outlet member. The valve in the inert gas supply duct is then closed again. The remaining flow of inert gas is now suflicient to prevent penetration of metal.
  • a needle valve is present, which preferably can be operated electromagnetically and which can fully or partly close the passage of the outlet member.
  • the position of the needle valve can always be adapted to the supplied flow of oxidant, so that always a high speed occurs in the passage of the valve and hence no metal can penetrate. Furthermore, it is possible to close the passage entirely when no oxidant is supplied, so that in this case also no inert gas need be circulated by pumping.
  • the movements of the needle valve lag slightly with respect to the movements of the regulating valve in the ducts communicating with the first container. In this manner it is achieved that upon closing the oxidant supply valve and opening the inert gas supply valve, a large flow of inert gas flows through the outlet member for a moment, so that the oxidant is driven out. The flow of inert gas then becomes much smaller.
  • a further favorable embodiment comprises, in addition to the armature of the operating electromagnet, a further armature which is slidably provided on the valve stem between two stop members which are provided on the valve stem, two electromagnets being present, one of which is capable of pulling said slidable armature against one stop member and the other against the other stop member.
  • the slidable armature will hit the stop members with a given shock, so that the valve also hits the seating with a shock.
  • FIG. 1 diagrammatically shows, not to scale a construction of a heater system.
  • FIG. 2 diagrammatically shows an outlet member.
  • FIG. 3 is a diagram for regulating the gas flow through the outlet member shown in FIG. 2.
  • FIG. 4 shows on an enlarged scale another embodiment of an outlet member
  • FIG. 5 shows a diagram for regulating the gas flow through the outlet member shown in FIG. 4,
  • FIG. 6 is a further embodiment of the outlet member shown in FIG. 4.
  • Reference numeral 1 in FIG. 1 denotes a reaction vessel containing a metal mixture of mainly Li and Ca which is melted at the operating temperature of approximately 800 C.
  • Reference numeral 2 is a first container containing a fluorine compound as an oxidant which communicates via duct 3 with a number of supply ducts, of which, 4 and 5, are shown, and further includes regulating valves 6 and 7, and outlet members 8 and 9, respectively, on its side facing the reaction vessel.
  • the heater system furthermore comprises a second container 10 containing argon which communicates, via ducts 11 and 12 including regulating valves 13 and 14, with the supply ducts 4 and 5.
  • An argon outlet duct 15 furthermore communicates with the reaction vessel 1 through a cooler 16, from a compressor 17, the compression side of which communicates with the container 10.
  • the heat evolved in the reaction vessel 1 is transferred to a heater 20 of a hot-gas engine 21 shown only partly and arranged in said vessel.
  • the heater 20 consists of a number of pipes 22 which communicate at one end with the regenerator 23 and at the other end with an annular duct 24, and of a number of pipes 25 which communicate the annular duct 24 with the expansion space.
  • a guiding plate 26 secured to the annular duct is a guiding plate 26 constructed as a body of revolution in which a pump 27 coupled to an electric motor 28 can rotate.
  • the liquid is circulated by said pump as is denoted by arrows.
  • the liquid passes the pipes 22 and 25, respectively, arranged in a ring so that a good heat transfer is ensured between the liquid and the pipes.
  • this system is as follows. First the metal mass is melted by heating by means of the electric heating device 29 and 30. By opening the regulating valves 6 and 7, the fluorine compound is then introduced into the reaction vessel in which said compound reacts chemically with the metal while evolving heat. In order to prevent liquid metal from penetrating into the outlet members 8 and 9 a flow of argon can be conducted along with the fluorine current, continuously or in those periods in which the fluorine current is too low to check said penetration, by opening valves 13 and 14, so that a sufficient flow rate in the outlet members occur to check penetration of metal. The argon which is conducted along does not react with the metal and iscollected in the upper side of the reaction vessel.
  • the argon pressure is maintained at a given constant value. This pressure also ensures that the pump 27 operates smoothly so that a liquid circulation occurs in the container 1, and the liquid can supply its heat to the heater pipes 22 and 25, respectively.
  • FIG. 2 shows an outlet member on an enlarged scale. It comprises a copper block 40 in which a duct 41 is recessed.
  • the block 40 is surrounded by a metal member 42, with a cooling jacket 43 present between said metal member 42 and the copper block 40, including a cooling water supply inlet 44 and a cooling water outlet 45.
  • the duct 41 extends in the metal member 42 and communicates with the supply 4 inlet for the fluorine compound and the supply 11 for argon, respectively.
  • a metal gauze 46 is arranged in the duct 41.
  • An outlet member 47 made from tungsten is secured in the duct 41 so as to be readily heat conducting.
  • the copper block 40 is secured in an aperture in the wall of the reaction container 1 with the interposition of a stainless steel and hence insulating jacket 48.
  • a thermal insulation layer 49 is provided between the end face of the copper block 40 and the stainless steel jacket.
  • the passage of the outlet member 47 and the pressure of the fluorine compound and argon are chosen such that in the outlet member the rate of flow is larger than the reaction speed of the metal with the fluorine compound, and for that reason penetration of the metal will not occur.
  • tungsten can hardly or cannot be wetted by the liquid in the reaction vessel, so that creeping in of metal along the walls of the outlet member is unlikely.
  • the large rate of flow of gas in the outlet member cools this member considerably, so that the temperature will remain lower than the temperature at which the fluorine compound will react with the tungsten.
  • the outlet member is cooled by' the water which withdraws heat from the copper block 40 and hence from the outlet member 47 in the cooling jacket 43. In this manner a reliable outlet member is obtained.
  • FIGS. 3a and 3b show in the horizontal direction the time t with lines 6 and 13 of FIG. 3a showing the value of the fluorine and argon flow, and lines 6, 13 and 50, in FIG. 3b showing the opened position of valves 6, l3 and bypass 50, respectively.
  • the valve 13 in the argon supply duct is closed so that only argon can flow through the bypass 50 across the valve 13.
  • the valve 6 is fully opened so that a large flow of oxidant occurs.
  • valve 6 is closed and the valve 13 is opened for a moment.
  • the flow of oxidant becomes zero and a large flow of argon is obtained for a moment which rapidly cleans the outlet member.
  • valve 13 is closed again and the remaining small flow of argon through the bypass 50 is sufficient to prevent penetration of metal into the outlet member 47. In this manner there is a minimum of argon circulated by pumping from the container 10 to thereaction vessel 1 and via compressor l7 and back is sufficient.
  • FIG. 4 shows another embodiment of the outlet member 8, 9 on an enlarged scale.
  • 40 is again a copper block in which a duct 41 is recessed.
  • an outlet member 47 of tungsten is secured in the duct 41 so as to be readily heat-conducting.
  • the copper block is secured in an aperture in the wall of the reaction vessel 1 with the interposition of a stainless steel jacket 48. In this jacket are provided an inlet 44 and an outlet 45 for cooling water which communicate with a cooling jacket 43 around the copper block.
  • the duct 41 continues in a duct 51 in a structural com ponent 52, which duct 51 communicates via a metal gauze 46, with the supply duct 4 foroxidant and the supply duct 11 for argon.
  • a needle-like valve body 53 is provided which comprises a valve stem 54 which comprises on its other side an armature 55 of an electromagnet 56.
  • a spring 57 exerts a closing force on the valve stem 54.
  • FIG. 5a shows idealized the value of the oxidant and argon flow as a function of time
  • FIG. 5b shows the positions of the valves 6 and 13 and of the needle valve 53, associated with the said flows.
  • valve 6 and the needle valve 53 are both open, so that in this period a large flow of oxygen (denoted by line 6 in FIG. 5a) flows through the outlet member 47. Simultaneously with the flow of oxidant, a small flow of argon flows via the bypass 50 through the outlet member.
  • the passage of said outlet member and the oxidant and argon pressure are chosen to be so that the rate of flow is sufficiently large to check penetration of liquid.
  • the outlet member is sufficiently cooled to maintain a temperature at which the oxidant does not react with tungsten.
  • the valve 6 is closed and the valve 13 is opened. Now a large flow of argon flows to the outlet member thereby rinsing away the oxidant still present.
  • FIG. 6 shows the same outlet member as FIG. 4, in which a second slidable armature 65 is provided on the valve stem 54 beside the armature 55.
  • This armature 65 can slide between two stop members 66 and 67.
  • two electromagnets 68 and 69 are present. The operation is as follows: When opening the valve the magnet 56 is energized while simultaneously magnet 69 is also energized, so that the movable armature moves to the stop member 67 and impacts against it with a shock. Due to this shock the valve 53, also when it is adhered to the seating, will easily be detached after which further opening by the magnet 56 can take place. Upon closing, the magnets 56 and 59 are not energized and the magnet 68 is energized indeed.
  • the spring 57 moves the valve to the seating, in which it obtains an extra shock because the armature 65 impacts against the stop member 66. Due to this shock, any metal or salt particles deposited on the valve seating will be detached. In this manner a very reliable valve is obtained.
  • a heating system for providing heat from an exothermic reaction of a first material, namely an oxidizing agent with a second reactant material namely a metal or metal mixture which is liquid at operating temperature, and using a third material, namely gas inert to both the first and second materials, comprising a. a reaction vessel for containing said reactant material and exothermic reaction,
  • a second supply duct for conveying the inert gas to join said oxidizing agent in the first supply duct
  • connection means for communicating said oxidizing agent and inert gas from the supply duct outlet into the reaction vessel, the connection means including:
  • a base element made of good heat-conducting material, having mounting surfaces for engaging the reaction vessel, and a passage therethrough with an outlet end for the flow from said first supply duct, this outlet end being substantially nonwettable by the reactant material in the reaction vessel, and (ii) a heat-insulating material interposed between said base element mounting surfaces and the vessel, the diameter of ,said passage and the pressure of the oxidizing agent and inert gas being selected and regulated by said means for regulating pressures, such that the rate of flow of the oxidizing agent and inert gas in said passage is greater than the reaction speed-of the oxidizing agent with the reactant material in the reaction vessel.
  • non-wettable part of the base element is an outlet member (i) that is secured in good thermal contact with the outlet end of the base element, and (ii) that has a passage through which the base member outlet discharges to the reaction vessel.
  • a system according to claim 1 further comprising a regulating valve associated with each of said first and second supply ducts.
  • reaction products are solid or liquid or a combination thereof at the temperature and pressure prevailing in the reaction vessel.
  • the reactant material comprises Li and Ca or salts thereof
  • the oxidizing agent is fluorine or a fluorine compound such as SP
  • the base part outlet end is a metal layer such as tungsten, molybdnum or tantalum, or one or more of the carbides or borides of said metals.
  • a system according to claim 1 further comprising in said first supply duct and in said base part passages, a filter element such as a gauze having mesh apertures of smaller cross-sectional dimensions than the passage of the base element.
  • said means for regulating the pressure comprises first and second regulating valves respectively in the first and second ducts, and a bypass duct having a narrow passage in parallel with said second regulating valve for permitting a constant flow of gas from the second container to the reaction vessel.
  • a system according to claim 1 further comprising a needle valve for selectively closing the outlet end of the base element passage, and electromagnetic means for operating said needle valve.
  • said means for regulating pressure comprises regulating valves in said first and second ducts operable in opposite phases, and includes a bypass having a narrow passage arranged in parallel with the valve in the second duct.
  • the regulating means further comprises a regulating valve in the first duct operable to control the needle valve in such manner that the movements of the needle valve lag slightly with respect to those of this regulating valve.
  • the needle valve has a stem and an armature movable on the stem between two stop members, and two electromagnetics, one of which moves said armature in the direction of one stop member, and the other which moves said armature in the direction of the other stop member, whereby the valve stem is jolted upon initial contact of the armature with each stop in each direction.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US860521A 1968-09-30 1969-09-24 Heater system Expired - Lifetime US3662739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6813987A NL6813987A (de) 1968-09-30 1968-09-30

Publications (1)

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US3662739A true US3662739A (en) 1972-05-16

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US860521A Expired - Lifetime US3662739A (en) 1968-09-30 1969-09-24 Heater system

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US (1) US3662739A (de)
BE (1) BE739550A (de)
CA (1) CA923002A (de)
CH (1) CH512042A (de)
DE (1) DE1948307A1 (de)
DK (1) DK124043B (de)
FR (1) FR2019215A1 (de)
GB (1) GB1288417A (de)
NL (1) NL6813987A (de)
NO (1) NO127517B (de)
SE (1) SE351461B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359229A (zh) * 2013-10-22 2015-02-18 王平 一种智能阀门控制的太阳能吸热系统
CN104359231A (zh) * 2013-10-22 2015-02-18 王平 一种太阳能热利用系统
CN104359230A (zh) * 2013-10-22 2015-02-18 王平 一种太阳能热水器系统
CN104406308A (zh) * 2013-10-22 2015-03-11 王平 一种太阳能热水器系统
CN104406307A (zh) * 2013-10-22 2015-03-11 王平 一种自能控制自动加热的太阳能热水器系统
CN104406223A (zh) * 2013-10-22 2015-03-11 王平 一种设置散热器的太阳能热水器系统
US20210180710A1 (en) * 2019-12-13 2021-06-17 Goodrich Corporation Pressure regulator and method of using the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498946B1 (fr) * 1980-11-10 1986-05-09 Europ Propulsion Injecteur composite pour l'introduction d'un premier produit corrosif dans une chaudiere contenant un deuxieme produit corrosif
FR2604373B1 (fr) * 1986-09-26 1990-03-09 Europ Propulsion Injecteur composite pour l'introduction d'un premier produit corrosif dans une enceinte contenant un deuxieme produit corrosif
JPH0582507A (ja) * 1991-09-18 1993-04-02 Applied Materials Japan Kk 液体気化バルブ

Citations (5)

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US3161192A (en) * 1960-12-06 1964-12-15 Mark E Mccormack Air-conditioned protective garment and air-supply-and-conditioning apparatus for the same
US3229681A (en) * 1961-08-25 1966-01-18 Ethyl Corp Warming suit
US3367319A (en) * 1966-11-09 1968-02-06 Firewel Company Inc Apparatus for heating a diver clothed in a suit and immersed in cold water
US3385286A (en) * 1967-01-25 1968-05-28 Westinghouse Electric Corp Hydrogen-oxygen catalytic heater
US3450127A (en) * 1968-02-26 1969-06-17 Aro Of Buffalo Inc Chemical packheater for diver's suit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161192A (en) * 1960-12-06 1964-12-15 Mark E Mccormack Air-conditioned protective garment and air-supply-and-conditioning apparatus for the same
US3229681A (en) * 1961-08-25 1966-01-18 Ethyl Corp Warming suit
US3367319A (en) * 1966-11-09 1968-02-06 Firewel Company Inc Apparatus for heating a diver clothed in a suit and immersed in cold water
US3385286A (en) * 1967-01-25 1968-05-28 Westinghouse Electric Corp Hydrogen-oxygen catalytic heater
US3450127A (en) * 1968-02-26 1969-06-17 Aro Of Buffalo Inc Chemical packheater for diver's suit

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359229A (zh) * 2013-10-22 2015-02-18 王平 一种智能阀门控制的太阳能吸热系统
CN104359231A (zh) * 2013-10-22 2015-02-18 王平 一种太阳能热利用系统
CN104359230A (zh) * 2013-10-22 2015-02-18 王平 一种太阳能热水器系统
CN104406308A (zh) * 2013-10-22 2015-03-11 王平 一种太阳能热水器系统
CN104406307A (zh) * 2013-10-22 2015-03-11 王平 一种自能控制自动加热的太阳能热水器系统
CN104406223A (zh) * 2013-10-22 2015-03-11 王平 一种设置散热器的太阳能热水器系统
CN104359229B (zh) * 2013-10-22 2016-02-24 广东水利电力职业技术学院 一种智能阀门控制的太阳能吸热系统
CN104406308B (zh) * 2013-10-22 2016-08-24 青岛玉兰祥商务服务有限公司 一种太阳能热水器系统
CN104359231B (zh) * 2013-10-22 2016-08-24 青岛玉兰祥商务服务有限公司 一种太阳能热利用系统
CN104359230B (zh) * 2013-10-22 2016-08-24 青岛玉兰祥商务服务有限公司 一种太阳能热水器系统
CN104406307B (zh) * 2013-10-22 2016-08-24 华北理工大学 一种自动控制自动加热的太阳能热水利用系统
CN104406223B (zh) * 2013-10-22 2016-08-24 青岛玉兰祥商务服务有限公司 一种设置散热器的太阳能热水器系统
US20210180710A1 (en) * 2019-12-13 2021-06-17 Goodrich Corporation Pressure regulator and method of using the same
US12146687B2 (en) * 2019-12-13 2024-11-19 Goodrich Corporation Pressure regulator and method of using the same

Also Published As

Publication number Publication date
DE1948307A1 (de) 1970-04-16
CH512042A (de) 1971-08-31
NL6813987A (de) 1970-04-01
SE351461B (de) 1972-11-27
NO127517B (de) 1973-07-02
GB1288417A (de) 1972-09-06
BE739550A (de) 1970-03-31
DK124043B (da) 1972-09-04
FR2019215A1 (de) 1970-06-26
CA923002A (en) 1973-03-20

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