EP1429096A2 - Cryogenic liquefied gas supply system with enthalpy control - Google Patents

Cryogenic liquefied gas supply system with enthalpy control Download PDF

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Publication number
EP1429096A2
EP1429096A2 EP03028348A EP03028348A EP1429096A2 EP 1429096 A2 EP1429096 A2 EP 1429096A2 EP 03028348 A EP03028348 A EP 03028348A EP 03028348 A EP03028348 A EP 03028348A EP 1429096 A2 EP1429096 A2 EP 1429096A2
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EP
European Patent Office
Prior art keywords
control
liquefied gas
cryogenic liquefied
gas
gas mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03028348A
Other languages
German (de)
French (fr)
Other versions
EP1429096A3 (en
Inventor
Wolfgang Hoffmanns
Friedrich Moser
Stefan Kosock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide Deutschland GmbH
Messer Group GmbH
Original Assignee
Messer Griesheim GmbH
Air Liquide Deutschland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer Griesheim GmbH, Air Liquide Deutschland GmbH filed Critical Messer Griesheim GmbH
Publication of EP1429096A2 publication Critical patent/EP1429096A2/en
Publication of EP1429096A3 publication Critical patent/EP1429096A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
    • F25B19/005—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour the refrigerant being a liquefied gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
    • B28C5/468—Cooling, e.g. using ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/19—Calculation of parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2515—Flow valves

Definitions

  • the invention relates to a control and regulating device for the enthalpy-dependent Dosing of a cryogenic liquefied gas or gas mixture, their use and a corresponding procedure.
  • cryogenic liquid gas is used as the refrigerant. These applications work mostly with an intermittent injection of the liquid gas in adjustable Time intervals and adjustable total time to overshoot the Avoid temperature below the set point.
  • the parameters are in Preliminary tests determined based on the product.
  • the object of the invention is to provide an alternative dosage of a cryogenic to provide liquefied gas or gas mixture.
  • the control and regulating device for the enthalpy-dependent metering of a cryogenic liquefied gas or gas mixture has a heated Temperature sensor (6) on.
  • Cryogenic liquefied gases are, for example, liquid nitrogen, liquid air, liquid carbon dioxide, liquid argon, liquid hydrogen or liquid helium.
  • the cooling capacity of the Liquefied gas (cryogenic liquefied gas or gas mixture) is decisive.
  • the Cooling capacity depends on the enthalpy and the mass flow of the liquid gas dependent.
  • the pulse / pause ratio of the injector is adjusted. That means at negative control deviation, the pulse duration is extended at the expense of the break and shortened in the case of a positive control deviation, so that a constant cooling energy is made available.
  • Product-related starting conditions are the desired ones Final product temperatures reached; the thermal history of Feeding devices (pipeline, injection valve) are taken into account.
  • Fig. 1 shows a liquid gas supply system with an isolated Storage container (1) for the refrigerant, e.g. Nitrogen liquid, one Withdrawal valve (2), a safety valve (3), a control or Control device (4), an electric heater (5), a temperature sensor (6), an injection valve or metering valve (7) and a consumer (9) for the Refrigerants, e.g. a mixer, tumbler or cutter.
  • the refrigerant e.g. Nitrogen liquid
  • one Withdrawal valve (2) e.g. Nitrogen liquid
  • a safety valve (3) e.g. Nitrogen liquid
  • a control or Control device (4) e.g. Nitrogen liquid
  • an electric heater (5) e.g. Nitrogen liquid
  • a temperature sensor (6) e.g. a temperature sensor
  • a consumer e.g. a mixer, tumbler or cutter.
  • the temperature sensor (6) of the control or regulating device (4) is located with the electric heater (5) in a common protective tube thin-walled material, e.g. Stainless steel.
  • the protective tube is thus in the Supply line to the injection valve installed so that the refrigerant flows around it becomes.
  • the temperature sensor (6) can preferably be a Pt-100, but also a Thermocouple, an electrical carbon film resistor or a semiconductor.
  • the heating power of the electric heater (5) is so low that when in use of a double Pt-100, the second Pt-100 with an additional series resistor as Heating circuit can serve.
  • a temperature controller can be used as the control device (4) be used.
  • the injection valve (7) can preferably be a solenoid valve, a pneumatic one controlled open-close valve or a control valve (8).

Abstract

The control and regulation device (4) provides enthalpy-dependent dosing of the low-temperature liquefied gas or gas mixture using a heated temperature sensor (6) and a controlled dosing valve (7) incorporated in the supply line feeding the low-temperature liquefied gas or gas mixture to a load (9). An Independent claim for an operating method for a supply plant for a low-temperature liquefied gas or gas mixture is also included.

Description

Die Erfindung betrifft eine Steuer- und Regeleinrichtung für die Enthalpie-abhängige Dosierung eines tiefkalt verflüssigten Gases oder Gasgemisches, deren Verwendung und ein entsprechendes Verfahren.The invention relates to a control and regulating device for the enthalpy-dependent Dosing of a cryogenic liquefied gas or gas mixture, their use and a corresponding procedure.

Bei Kühl- oder Gefrieranwendungen wie z.B. in Mischern, Kuttern oder Tumblern wird tiefkaltes Flüssiggas als Kältemittel benutzt. Diese Anwendungen arbeiten meistens mit einer taktenden Einspritzung des Flüssiggases in einstellbaren Zeitintervallen und einstellbarer Gesamtzeit, um ein Überschwingen der Temperatur unter den Sollwert zu vermeiden. Die Parameter werden in Vorversuchen produktbezogen ermittelt.In cooling or freezing applications such as in mixers, cutters or tumblers cryogenic liquid gas is used as the refrigerant. These applications work mostly with an intermittent injection of the liquid gas in adjustable Time intervals and adjustable total time to overshoot the Avoid temperature below the set point. The parameters are in Preliminary tests determined based on the product.

Die bekannten Vorrichtungen haben folgende Nachteile:

  • Bei längeren Versorgungsleitungen ist zur Erzeugung einer gleichmäßigen Kälte ein druckgesteuerter Gasphasenabscheider erforderlich.
  • Das Taktzeitverfahren berücksichtigt nicht die thermische Vorgeschichte der Anlage.
  • Das Kaltfahren einer warmen Anlage dauert wegen der konstanten Einspritzpausen länger als erforderlich.
  • Das Taktzeitverfahren berücksichtigt nicht den tatsächlichen Kälteinhalt des Flüssiggases, der vom Zustand (Druck, Temperatur, Phase) des Flüssiggases abhängt. Die Endtemperatur eines bestimmten Produktes ist daher durchaus unterschiedlich.
The known devices have the following disadvantages:
  • In the case of longer supply lines, a pressure-controlled gas phase separator is required to generate even cooling.
  • The cycle time method does not take into account the thermal history of the system.
  • Cold operation of a warm system takes longer than necessary due to the constant injection pauses.
  • The cycle time method does not take into account the actual cold content of the liquid gas, which depends on the state (pressure, temperature, phase) of the liquid gas. The final temperature of a certain product is therefore quite different.

Aufgabe der Erfindung ist es, eine alternative Dosierung eines tiefkalt verflüssigten Gases oder Gasgemisches bereit zu stellen.The object of the invention is to provide an alternative dosage of a cryogenic to provide liquefied gas or gas mixture.

Die Aufgabe wird gelöst durch eine Steuer- und Regeleinrichtung mit den in Anspruch 1 beschriebenen Merkmalen. The task is solved by a control and regulating device with the in Features described claim 1.

Die Steuer- und Regeleinrichtung für die Enthalpie-abhängige Dosierung eines tiefkalt verflüssigten Gases oder Gasgemisches weist einen beheizten Temperaturfühler (6) auf.The control and regulating device for the enthalpy-dependent metering of a cryogenic liquefied gas or gas mixture has a heated Temperature sensor (6) on.

Tiefkalt verflüssigte Gase (Flüssiggase) sind beispielsweise flüssiger Stickstoff, flüssige Luft, flüssiges Kohlendioxid, flüssiges Argon, flüssiger Wasserstoff oder flüssiges Helium.Cryogenic liquefied gases (liquefied gases) are, for example, liquid nitrogen, liquid air, liquid carbon dioxide, liquid argon, liquid hydrogen or liquid helium.

Für die Endtemperatur eines zu kühlenden Produktes ist bei konstanten produktseitigen Ausgangsbedingungen und fester Kühlzeit die Kälteleistung des Flüssiggases (tiefkalt verflüssigtes Gas oder Gasgemisch) maßgebend. Die Kälteleistung ist von der Enthalpie und dem Massenstrom des Flüssiggases abhängig.For the final temperature of a product to be cooled is constant initial conditions and fixed cooling time the cooling capacity of the Liquefied gas (cryogenic liquefied gas or gas mixture) is decisive. The Cooling capacity depends on the enthalpy and the mass flow of the liquid gas dependent.

Die Kälteleistung des Flüssiggases, bzw. eine mittelbare Größe, hier der Meßwert des beheizten Temperaturfühlers vor dem Einspritzventil (Dosierventil) wird erfasst und mit dem Sollwert verglichen. Bei Abweichungen wird vorzugsweise das Puls-/Pausenverhältnis des Einspritzventils angepasst. Das heißt bei negativer Regelabweichung wird die Pulsdauer auf Kosten der Pause verlängert und bei positiver Regelabweichung verkürzt, sodass über die Zeit eine gleichbleibende Kälteenergie zur Verfügung gestellt wird. Bei konstanten, produktbezogenen Ausgangsbedingungen werden somit die gewünschten Endtemperaturen des Produktes erreicht; die thermische Vorgeschichte der Zuführungseinrichtungen (Rohrleitung, Einspritzventil) wird dabei berücksichtigt.The cooling capacity of the liquid gas, or an indirect quantity, here the measured value of the heated temperature sensor in front of the injection valve (metering valve) recorded and compared with the setpoint. In case of deviations it is preferred the pulse / pause ratio of the injector is adjusted. That means at negative control deviation, the pulse duration is extended at the expense of the break and shortened in the case of a positive control deviation, so that a constant cooling energy is made available. At constant, Product-related starting conditions are the desired ones Final product temperatures reached; the thermal history of Feeding devices (pipeline, injection valve) are taken into account.

Die Erfindung wird anhand der Zeichnung erläutert.The invention is explained with reference to the drawing.

Fig. 1 zeigt eine Flüssiggas-Versorgungsanlage mit einem isolierten Vorratsbehälter (1) für das Kältemittel, z.B. Stickstoff flüssig, einem Entnahmeventil (2), einem Sicherheitsventil (3), einer Steuer- oder Regeleinrichtung (4), einer elektrischen Heizung (5), einem Temperaturfühler (6), einem Einspritzventil oder Dosierventil (7) und einem Verbraucher (9) für das Kältemittel, z.B. einem Mischer, Tumbler oder Kutter. Fig. 1 shows a liquid gas supply system with an isolated Storage container (1) for the refrigerant, e.g. Nitrogen liquid, one Withdrawal valve (2), a safety valve (3), a control or Control device (4), an electric heater (5), a temperature sensor (6), an injection valve or metering valve (7) and a consumer (9) for the Refrigerants, e.g. a mixer, tumbler or cutter.

Der Temperaturfühler (6) der Steuer- oder Regeleinrichtung (4) befindet sich mit der elektrischen Heizung (5) in einem gemeinsamen Schutzrohr aus dünnwandigem Material, z.B. Edelstahl. Das Schutzrohr wird so in die Zuführleitung zum Einspritzventil eingebaut, dass es vom Kältemittel umströmt wird. Der Temperaturfühler (6) kann vorzugsweise ein Pt-100, aber auch ein Thermoelement, ein elektrischer Kohleschichtwiderstand oder ein Halbleiter sein. Die Heizleistung der elektrischen Heizung (5) ist so gering, dass bei Verwendung eines Doppel-Pt-100, das zweite Pt-100 mit einem zusätzlichen Vorwiderstand als Heizkreis dienen kann. Als Regeleinrichtung (4) kann ein Temperaturregler verwendet werden.The temperature sensor (6) of the control or regulating device (4) is located with the electric heater (5) in a common protective tube thin-walled material, e.g. Stainless steel. The protective tube is thus in the Supply line to the injection valve installed so that the refrigerant flows around it becomes. The temperature sensor (6) can preferably be a Pt-100, but also a Thermocouple, an electrical carbon film resistor or a semiconductor. The heating power of the electric heater (5) is so low that when in use of a double Pt-100, the second Pt-100 with an additional series resistor as Heating circuit can serve. A temperature controller can be used as the control device (4) be used.

Das Einspritzventil (7) kann vorzugsweise ein Magnetventil, ein pneumatisch gesteuertes Auf-Zu-Ventil oder ein Stellventil (8) sein.The injection valve (7) can preferably be a solenoid valve, a pneumatic one controlled open-close valve or a control valve (8).

Funktion

  • 1. Taktbetrieb mit Magnetventil / pneumatisch gesteuertem Auf-Zu-Ventil
    Nach dem Start des Kühlvorgangs beginnt der erste Taktzyklus mit dem Öffnen des Einspritzventils (7). Der beheizte Temperaturfühler (6) wird vom Massenstrom des Flüssiggases in Abhängigkeit von dessen Enthalpie abgekühlt. Die Regeleinrichtung (4) arbeitet mit konstanten, aber einstellbaren Taktzeiten, in denen die Puls- und Pausendauer in Abhängigkeit von der Regelabweichung verändert wird. Die Pulsdauer kann dadurch im Bereich von z.B. 20% bis 80% der Taktzeit, je nach Regelabweichung, variieren. Nach Ablauf der Puls- und der anschließenden Pausenzeit beginnt ein neuer Takt. Sobald der Sollwert der Temperatur erreicht wird, wird das Einspritzventil (7) geschlossen und erst bei Überschreitung im nächsten Takt wieder geöffnet.
  • 2. Kontinuierlicher Betrieb mit Stellventil
    Nach dem Start des Kühlvorgangs, öffnet das Stellventil (8). Der beheizte Temperaturfühler (6) wird vom Massenstrom des Flüssiggases in Abhängigkeit von dessen Enthalpie abgekühlt. Je nach Regelabweichung wird der Querschnitt des Stellventils ausgeregelt.
    • function
  • 1st cycle operation with solenoid valve / pneumatically controlled open-close valve
    After the start of the cooling process, the first cycle starts with the opening of the injection valve (7). The heated temperature sensor (6) is cooled by the mass flow of the liquid gas depending on its enthalpy. The control device (4) works with constant but adjustable cycle times, in which the pulse and pause duration is changed as a function of the control deviation. The pulse duration can vary in the range of, for example, 20% to 80% of the cycle time, depending on the control deviation. After the pulse and the pause time has elapsed, a new cycle begins. As soon as the temperature setpoint is reached, the injection valve (7) is closed and only opened again when it is exceeded in the next cycle.
  • 2. Continuous operation with control valve
    After the cooling process has started, the control valve (8) opens. The heated temperature sensor (6) is cooled by the mass flow of the liquid gas depending on its enthalpy. The cross section of the control valve is corrected depending on the control deviation.

    • Claims (8)

    Steuer- und Regeleinrichtung für die Enthalpie-abhängige Dosierung eines tiefkalt verflüssigten Gases oder Gasgemisches, die einen beheizten Temperaturfühler (6) aufweist.Control and regulating device for the enthalpy-dependent metering of a cryogenic liquefied gas or gas mixture, which is a heated Has temperature sensor (6). Steuer- und Regeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Steuer- und Regeleinrichtung ein steuerbares Ventil (7) zur Dosierung des tiefkalt verflüssigten Gases oder Gasgemisches aufweist.Control and regulating device according to claim 1, characterized in that the control and regulating device has a controllable valve (7) for metering the cryogenic liquefied gas or gas mixture. Steuer- und Regeleinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Temperaturfühler (6) mit einer Steuer- oder Regeleinheit (4) verbunden ist.Control and regulating device according to claim 1 or 2, characterized in that the temperature sensor (6) is connected to a control or regulating unit (4). Steuer- und Regeleinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Temperaturfühler (6) und ein steuerbares Ventil (7) an einer das tiefkalt verflüssigte Gase oder Gasgemisch führenden Leitung, die zu einem Verbraucher (9) führt, angeordnet sind.Control and regulating device according to one of claims 1 to 3, characterized in that the temperature sensor (6) and a controllable valve (7) are arranged on a line carrying the cryogenic liquefied gases or gas mixture and leading to a consumer (9) , Verfahren zum Betrieb einer Versorgungsanlage für ein tiefkalt verflüssigtes Gas oder Gasgemisch, bei der die einem Verbraucher (9) zugeführte Menge des tiefkalt verflüssigten Gases oder Gasgemisches in Abhängigkeit des Massenstromes des tiefkalt verflüssigten Gases oder Gasgemisches gesteuert oder geregelt wird.Method for operating a supply system for a cryogenic liquefied Gas or gas mixture in which the amount supplied to a consumer (9) of the cryogenic liquefied gas or gas mixture depending on the Mass flow of cryogenic liquefied gas or gas mixture controlled or is regulated. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass flüssiger Stickstoff als tiefkalt verflüssigtes Gas dient.A method according to claim 5, characterized in that liquid nitrogen serves as cryogenic liquefied gas. Verwendung einer Steuer- und Regeleinrichtung nach einem der Ansprüche 1 bis 4 in einer Versorgungsanlage für ein tiefkalt verflüssigtes Gas oder Gasgemisch. Use of a control and regulating device according to one of claims 1 up to 4 in a supply system for a cryogenic liquefied gas or Gas mixture. Verwendung nach Anspruch 7, dadurch gekennzeichnet, dass die Versorgungsanlage mit einem Mischer, Tumbler oder Kutter verbunden ist.Use according to claim 7, characterized in that the supply system is connected to a mixer, tumbler or cutter.
    EP03028348A 2002-12-11 2003-12-10 Cryogenic liquefied gas supply system with enthalpy control Withdrawn EP1429096A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10257836 2002-12-11
    DE2002157836 DE10257836A1 (en) 2002-12-11 2002-12-11 Supply system for cryogenic liquefied gas with enthalpy control

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    Publication Number Publication Date
    EP1429096A2 true EP1429096A2 (en) 2004-06-16
    EP1429096A3 EP1429096A3 (en) 2004-12-15

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    Publication number Priority date Publication date Assignee Title
    EP2951122A4 (en) * 2013-02-04 2017-03-08 Carboncure Technologies Inc. System and method of applying carbon dioxide during the production of concrete
    CN106679263A (en) * 2016-12-07 2017-05-17 深圳市欣华兴节能科技有限公司 Liquid nitrogen cooling capacity recycling device and control method
    FR3047538A1 (en) * 2016-02-04 2017-08-11 Cryostar Sas CRYOGENIC LIQUID DELIVERY SYSTEM
    US9758437B2 (en) 2013-06-25 2017-09-12 Carboncure Technologies Inc. Apparatus for delivery of carbon dioxide to a concrete mix in a mixer and determining flow rate
    US10246379B2 (en) 2013-06-25 2019-04-02 Carboncure Technologies Inc. Methods and compositions for concrete production
    US10350787B2 (en) 2014-02-18 2019-07-16 Carboncure Technologies Inc. Carbonation of cement mixes
    US10570064B2 (en) 2014-04-07 2020-02-25 Carboncure Technologies Inc. Integrated carbon dioxide capture
    US10654191B2 (en) 2012-10-25 2020-05-19 Carboncure Technologies Inc. Carbon dioxide treatment of concrete upstream from product mold
    US10927042B2 (en) 2013-06-25 2021-02-23 Carboncure Technologies, Inc. Methods and compositions for concrete production
    US11660779B2 (en) 2016-04-11 2023-05-30 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water
    US11958212B2 (en) 2017-06-20 2024-04-16 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water

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    CN112129136B (en) * 2020-09-04 2021-11-16 西北工业大学 Low-temperature cold air generating device capable of stabilizing temperature and pressure and control method

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3388558A (en) * 1966-07-28 1968-06-18 Westinghouse Electric Corp Refrigeration systems employing subcooling control means
    US3638446A (en) * 1969-06-27 1972-02-01 Robert T Palmer Low ambient control of subcooling control valve
    US4343634A (en) * 1981-03-23 1982-08-10 Union Carbide Corporation Process for operating a fluidized bed
    DE19603175A1 (en) * 1996-01-30 1997-07-31 Wilhelm Dr Buck Method and device for monitoring, setting and regulating the filling level of a refrigerant evaporator

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3388558A (en) * 1966-07-28 1968-06-18 Westinghouse Electric Corp Refrigeration systems employing subcooling control means
    US3638446A (en) * 1969-06-27 1972-02-01 Robert T Palmer Low ambient control of subcooling control valve
    US4343634A (en) * 1981-03-23 1982-08-10 Union Carbide Corporation Process for operating a fluidized bed
    DE19603175A1 (en) * 1996-01-30 1997-07-31 Wilhelm Dr Buck Method and device for monitoring, setting and regulating the filling level of a refrigerant evaporator

    Cited By (17)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US10654191B2 (en) 2012-10-25 2020-05-19 Carboncure Technologies Inc. Carbon dioxide treatment of concrete upstream from product mold
    US10683237B2 (en) 2013-02-04 2020-06-16 Carboncure Technologies Inc. System and method of applying carbon dioxide during the production of concrete
    US9790131B2 (en) 2013-02-04 2017-10-17 Carboncure Technologies Inc. System and method of applying carbon dioxide during the production of concrete
    EP2951122A4 (en) * 2013-02-04 2017-03-08 Carboncure Technologies Inc. System and method of applying carbon dioxide during the production of concrete
    US11773019B2 (en) 2013-06-25 2023-10-03 Carboncure Technologies Inc. Methods and compositions for concrete production
    US11773031B2 (en) 2013-06-25 2023-10-03 Carboncure Technologies Inc. Apparatus for delivery of a predetermined amount of solid and gaseous carbon dioxide
    US9758437B2 (en) 2013-06-25 2017-09-12 Carboncure Technologies Inc. Apparatus for delivery of carbon dioxide to a concrete mix in a mixer and determining flow rate
    US10927042B2 (en) 2013-06-25 2021-02-23 Carboncure Technologies, Inc. Methods and compositions for concrete production
    US10246379B2 (en) 2013-06-25 2019-04-02 Carboncure Technologies Inc. Methods and compositions for concrete production
    US10350787B2 (en) 2014-02-18 2019-07-16 Carboncure Technologies Inc. Carbonation of cement mixes
    US10570064B2 (en) 2014-04-07 2020-02-25 Carboncure Technologies Inc. Integrated carbon dioxide capture
    US11878948B2 (en) 2014-04-07 2024-01-23 Carboncure Technologies Inc. Integrated carbon dioxide capture
    CN109073152A (en) * 2016-02-04 2018-12-21 克里奥斯塔股份有限公司 The transportation system of cryogenic liquid
    FR3047538A1 (en) * 2016-02-04 2017-08-11 Cryostar Sas CRYOGENIC LIQUID DELIVERY SYSTEM
    US11660779B2 (en) 2016-04-11 2023-05-30 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water
    CN106679263A (en) * 2016-12-07 2017-05-17 深圳市欣华兴节能科技有限公司 Liquid nitrogen cooling capacity recycling device and control method
    US11958212B2 (en) 2017-06-20 2024-04-16 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water

    Also Published As

    Publication number Publication date
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    DE10257836A1 (en) 2004-07-15

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