DE10257836A1 - Supply system for cryogenic liquefied gas with enthalpy control - Google Patents
Supply system for cryogenic liquefied gas with enthalpy control Download PDFInfo
- Publication number
- DE10257836A1 DE10257836A1 DE2002157836 DE10257836A DE10257836A1 DE 10257836 A1 DE10257836 A1 DE 10257836A1 DE 2002157836 DE2002157836 DE 2002157836 DE 10257836 A DE10257836 A DE 10257836A DE 10257836 A1 DE10257836 A1 DE 10257836A1
- Authority
- DE
- Germany
- Prior art keywords
- control
- gas
- cryogenic liquefied
- regulating device
- liquefied gas
- 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- Withdrawn
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Die Steuer- und Regeleinrichtung für die Enthalpie-abhängige Dosierung eines tiefkalt verflüssigten Gases oder Gasgemisches weist einen beheizten Temperaturfühler (6) zur Steuerung und Regelung der Dosierung 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) for controlling and regulating the metering.
Description
Die Erfindung betrifft eine Steuer- und Regeleinrichtung für die Enthalpieabhängige Dosierung eines tiefkalt verflüssigten Gases oder Gasgemisches, deren Verwendung und ein entsprechendes Verfahren.The invention relates to a control and control device for the enthalpy-dependent Dosage of a cryogenic liquefied Gases or gas mixture, their use and a corresponding Method.
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.For cooling or freezing applications such as. Cryogenic liquefied gas is found in mixers, cutters or tumblers as a refrigerant used. These applications mostly work with a clocking Injection of the liquid gas in adjustable time intervals and adjustable total time in order an overshoot avoid the temperature below the set point. The parameters are Product-related determined in preliminary tests.
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.
- - 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.
- - The cold running 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 a alternative dosing of a cryogenic liquefied gas or gas mixture ready to provide.
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 those described in claim 1 Features.
Die Steuer- und Regeleinrichtung
für die
Enthalpie-abhängige
Dosierung eines tiefkalt verflüssigten
Gases oder Gasgemisches weist einen beheizten Temperaturfühler (
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 more fluid, for example Nitrogen, liquid Air, liquid Carbon dioxide, liquid Argon, more 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 at constant initial conditions on the product side and firmer cooling time the cooling capacity of the liquid gas (cryogenic liquefied Gas or gas mixture) decisive. The cooling capacity is dependent on the enthalpy and the mass flow of the liquid gas.
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 size, here the measured value of the heated temperature sensor in front of the injection valve (metering valve) is detected and with the Setpoint compared. In the event of deviations, the pulse / pause ratio of the Injector adjusted. In the case of a negative system deviation the pulse duration is extended at the expense of the break and in the event of a positive control deviation shortened, so about that Time a constant cooling energy to disposal is provided. With constant, product-related starting conditions are the desired ones Final product temperatures reached; the thermal history the feeding devices (Pipeline, injection valve) is taken into account.
Die Erfindung wird anhand der Zeichnung erläutert.The invention is based on the drawing explained.
Der Temperaturfühler (
Das Einspritzventil (
Funktionfunction
1. Taktbetrieb mit Magnetventil / pneumatisch gesteuertem Auf-Zu-Ventil1st cycle operation with solenoid valve / pneumatically controlled on-off valve
Nach dem Start des Kühlvorgangs
beginnt der erste Taktzyklus mit dem Öffnen des Einspritzventils
(
2. Kontinuierlicher Betrieb mit Stellventil2. Continuous operation with control valve
Nach dem Start des Kühlvorgangs, öffnet das
Stellventil (
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002157836 DE10257836A1 (en) | 2002-12-11 | 2002-12-11 | Supply system for cryogenic liquefied gas with enthalpy control |
EP03028348A EP1429096A3 (en) | 2002-12-11 | 2003-12-10 | Cryogenic liquefied gas supply system with enthalpy control |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002157836 DE10257836A1 (en) | 2002-12-11 | 2002-12-11 | Supply system for cryogenic liquefied gas with enthalpy control |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10257836A1 true DE10257836A1 (en) | 2004-07-15 |
Family
ID=32319045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002157836 Withdrawn DE10257836A1 (en) | 2002-12-11 | 2002-12-11 | Supply system for cryogenic liquefied gas with enthalpy control |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1429096A3 (en) |
DE (1) | DE10257836A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112129136A (en) * | 2020-09-04 | 2020-12-25 | 西北工业大学 | Low-temperature cold air generating device capable of stabilizing temperature and pressure and control method |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8845940B2 (en) | 2012-10-25 | 2014-09-30 | Carboncure Technologies Inc. | Carbon dioxide treatment of concrete upstream from product mold |
AU2014212083A1 (en) * | 2013-02-04 | 2015-08-06 | Coldcrete, Inc. | System and method of applying carbon dioxide during the production of concrete |
US9388072B2 (en) | 2013-06-25 | 2016-07-12 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US9376345B2 (en) | 2013-06-25 | 2016-06-28 | Carboncure Technologies Inc. | Methods for delivery of carbon dioxide to a flowable concrete mix |
US10927042B2 (en) | 2013-06-25 | 2021-02-23 | Carboncure Technologies, Inc. | Methods and compositions for concrete production |
WO2015123769A1 (en) | 2014-02-18 | 2015-08-27 | Carboncure Technologies, Inc. | Carbonation of cement mixes |
EP3129126A4 (en) | 2014-04-07 | 2018-11-21 | Carboncure Technologies Inc. | Integrated carbon dioxide capture |
FR3047538B1 (en) * | 2016-02-04 | 2018-06-15 | Cryostar Sas | CRYOGENIC LIQUID DELIVERY SYSTEM |
CA3019860A1 (en) | 2016-04-11 | 2017-10-19 | 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 |
SG11201912759RA (en) | 2017-06-20 | 2020-01-30 | Carboncure Tech Inc | Methods and compositions for treatment of concrete wash water |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (3)
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 |
-
2002
- 2002-12-11 DE DE2002157836 patent/DE10257836A1/en not_active Withdrawn
-
2003
- 2003-12-10 EP EP03028348A patent/EP1429096A3/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112129136A (en) * | 2020-09-04 | 2020-12-25 | 西北工业大学 | Low-temperature cold air generating device capable of stabilizing temperature and pressure and control method |
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 |
Also Published As
Publication number | Publication date |
---|---|
EP1429096A3 (en) | 2004-12-15 |
EP1429096A2 (en) | 2004-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: AIR LIQUIDE DEUTSCHLAND GMBH, 47805 KREFELD, DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20140701 |