DE482819C - Process and device for determining the specific calorific value of combustible materials from a temperature difference that occurs during their combustion - Google Patents
Process and device for determining the specific calorific value of combustible materials from a temperature difference that occurs during their combustionInfo
- Publication number
- DE482819C DE482819C DES83616D DES0083616D DE482819C DE 482819 C DE482819 C DE 482819C DE S83616 D DES83616 D DE S83616D DE S0083616 D DES0083616 D DE S0083616D DE 482819 C DE482819 C DE 482819C
- Authority
- DE
- Germany
- Prior art keywords
- temperature difference
- calorific value
- combustion
- determining
- occurs during
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
- G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Volume Flow (AREA)
Description
Verfahren und Einrichtung zur Bestimmung des spezifischen Heizwertes von-brennbaren Stoffen aus einer bei ihrer Verbrennung auftretenden Temperaturdifferenz Es ist bekannt, den spezifischen Heizwert von brennbaren Stoffen, insbesondere Gasen, dadurch zu bestimmen, daß man den Stoff in einem abgeschlossenen Raum verbrennt, der durch Zuführung eines Kühlmittels, beispielsweise Wasser oder Luft, zusätzlich gekühlt wird.Method and device for determining the specific calorific value of combustible substances from a temperature difference that occurs during their combustion It is known to determine the specific calorific value of combustible materials, especially gases, to be determined by burning the substance in a closed room, by supplying a coolant, for example water or air, in addition is cooled.
Es wird dabei einerseits die Menge des zugeführten Brennstoffs und andererseits dieMenge des geförderten Kühlmittels gemessen und geregelt und außerdem die Temperaturdifferenz an zwei beliebigen Punkten des Verbrennungsraumes gemessen.It is on the one hand the amount of fuel supplied and on the other hand, the amount of the conveyed coolant is measured and regulated and also the temperature difference measured at any two points in the combustion chamber.
Gemäß der Erfindung wird der Aufbau einer derartigen Einrichtung dadurch wesentlich vereinfacht, daß das Verhältnis einer von der Temperaturdifferenz gesetzmäßig abhängigen EMK zu einer zusätzlichen EMK, welche der zur ErzeugungderTemperaturdifferenzverbrauchten Menge des brennbaren Stoffes entspricht, zweckmäßig mittels eines Kreuzspuleninstruments gemessen wird.According to the invention, the construction of such a device is thereby significantly simplified that the ratio of one of the temperature difference is lawful dependent EMF to an additional EMF, which is used to generate the temperature difference Corresponds to the amount of the combustible substance, expediently by means of a cross-coil instrument is measured.
Die zusätzliche EMK wird zweckmäßig mittels einer Tourendynamo erzeugt, die mit der Welle des Mengenmessers für den zugeführten brennbaren Stoff gekuppelt ist.The additional EMF is expediently generated by means of a touring dynamo, which is coupled with the shaft of the flow meter for the supplied combustible substance is.
Eine Förderpumpe für das Kühlmittel, eine Mengenmeß- und Regelvorrichtung für dieses sowie die dazugehörigen Rohrleitungen kommen bei der neuen Einrichtung inWegfall. Die Abmessungen der einzelnen Apparatteile, insbesondere des Verbrennungsraumes, lassen sich bei gleicher Meßgenauigkeit gegenüber denjenigen der bekannten Vorrichtungen verkleinern.A feed pump for the coolant, a quantity measuring and regulating device for this and the associated pipelines come at the new facility in omission. The dimensions of the individual parts of the apparatus, in particular the combustion chamber, can be achieved with the same measurement accuracy compared to that of the known devices zoom out.
Es hat sich gezeigt, daß bei richtiger Wahl der Abmessungen und unter der Voraussetzung eines konstanten Heizwertes des brennbaren Materials die gemessene Temperaturdifferenz der zur Verbrennung gelangenden Menge genau proportional ist. -In den Abb. i und z ist ein Ausführungsbeispiel der neuen Einrichtung in verschiedenen Ansichten dargestellt. Der auf seinem Heizwert zu prüfende brennbare Stoff tritt in der Pfeilrichtung in ein Rohr i ein, durchströmt dann einen rotierenden Mengenmesser a von beliebiger bekannter Bauart und gelangt schließlich zu einem Brenner 3, der in dem abgeschlossenen Raum q. angeordnet ist. Der Raum q. ist mit Luft gefüllt. Er steht mit der äußeren Luft zweckmäßig durch kleine, siebartige Öffnungen, die an seiner Wandung 5 angedeutet sind, in Verbindung, so daß im Inneren des Raumes q. Strömungen von außen weitgehend vermieden werden. An zwei beliebigen Stellen des Raumes q. wird die Temperatur gemessen. Zu diesem Zweck ist beispielsweise das Thermoelement 6 mit den Lötstellen 7 vorgesehen, die in den Stromkreis der einen Spule 8 eines Kreuzspuleninstruments 9 eingeschaltet sind. Die zweite Spule io des Gerätes 9 wird durch eine Tourendynamo ii gespeist, die mit der Achse i2 des Mengenmessers 2 gekuppelt ist.It has been shown that with the correct choice of dimensions and assuming a constant calorific value of the combustible material, the measured temperature difference is exactly proportional to the amount that is burned. -In Figs. I and z, an embodiment of the new device is shown in different views. The combustible substance to be tested for its calorific value enters a pipe i in the direction of the arrow, then flows through a rotating flow meter a of any known type and finally arrives at a burner 3, which is located in the closed space q. is arranged. The room q. is filled with air. It is expediently connected to the outside air through small, sieve-like openings which are indicated on its wall 5, so that inside the room q. External currents are largely avoided. At any two places in space q. the temperature is measured. For this purpose, for example, the thermocouple 6 is provided with the soldering points 7, which are switched into the circuit of one coil 8 of a cross-coil instrument 9. The second coil io of the device 9 is fed by a touring dynamo ii, which is coupled to the axis i2 of the flow meter 2.
Das Instrument 9 mißt also das Verhältnis zwischen der EMK, die dem Temperaturunterschied der Lötstellen 7 des Thermoelementes 6 entspricht, und derjenigen EMK, die von der Tourendynamo ii erzeugt wird.The instrument 9 thus measures the ratio between the EMF, the Temperature difference of the soldering points 7 of the thermocouple 6 corresponds, and that EMF generated by the touring dynamo ii.
Die Anzeige des Gerätes 9 stellt mit großer Genauigkeit ein Maß für den spezifischen Heizwert einesbrennbarenStoffesdar. DieneueAnordnung läßt sich sowohl für brennbare Gase als auch für Flüssigkeiten anwenden. Sie kann ferner für staubförmige Brennstoffe benutzt werden, die in derartigen Medien in feiner Verteilung enthalten sind, beispielsweise für in Luft enthaltenden Kohlenstaub.The display of the device 9 is a measure of with great accuracy represents the specific calorific value of a combustible material. The new arrangement can be apply to both flammable gases and liquids. It can also be used for Powdered fuels are used in such media in fine distribution are included, for example for coal dust contained in air.
Statt des Thermoelementes 6 können auch zwei temperaturempfindliche elektrische Widerstände benutzt werden, die beispielsweise einer Brückenschaltung angehören. Die Spule 8 des Gerätes 9 liegt dann in dem Diagonalzweig dieser Brückenschaltung. Schließlich kann man auch statt eines Thermoelementes mehrere in Serie geschaltete verwenden, deren erste Lötstelle jeweils an dem einen Punkt und deren zweite Lötstelle jeweils an dem anderen Punkt angeordnet ist, zwischen denen die Temperaturdifferenz gemessen werden soll. Es muß in allen Fällen lediglich dafür Sorge getragen werden, daß innerhalb des Raumes q. plötzliche von außen her erfolgende Luftströmungen vermieden werden.Instead of the thermocouple 6, two temperature-sensitive electrical resistors are used, for example a bridge circuit belong. The coil 8 of the device 9 is then in the diagonal branch of this bridge circuit. Finally, instead of one thermocouple, several series-connected thermocouples can be used use the first soldering point at the one point and the second soldering point each is arranged at the other point, between which the temperature difference should be measured. In all cases it is only necessary to ensure that that within the space q. sudden air currents from the outside avoided will.
Für den Fall, daß der Gasmesser nicht durch den eigenen Druck des zur Verbrennung gelangenden Stoffes betrieben werden kann und ein Motor benutzt wird, kann der Motor die Tourendynamo ersetzen, indem dann als eine der Brennstoffmenge proportionale Spannung die Betriebsspannung des Motors benutzt wird. Der Motor muß dann eine proportionale Abhängigkeit seiner Drehzahl von der Betriebsspannung innerhalb der praktisch eintretenden Spannungsschwankungen aufweisen.In the event that the gas meter cannot be operated by the burning substance can be operated and an engine is used the engine can replace the touring dynamo by then adding as one of the amount of fuel proportional voltage the operating voltage of the motor is used. The engine must then a proportional dependence of its speed on the operating voltage within the voltage fluctuations that occur in practice.
Statt der Tourendynamo kann zum Beispiel auch ein Regelwiderstand oder ein Spannungsteiler verwendet werden, der durch einen mit dem Mengenmesser gekuppelten Zentrifugalregulator eingestellt wird.Instead of the touring dynamo, a rheostat can also be used, for example or a voltage divider can be used by one with the flow meter coupled centrifugal regulator is set.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES83616D DE482819C (en) | 1928-01-15 | 1928-01-15 | Process and device for determining the specific calorific value of combustible materials from a temperature difference that occurs during their combustion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES83616D DE482819C (en) | 1928-01-15 | 1928-01-15 | Process and device for determining the specific calorific value of combustible materials from a temperature difference that occurs during their combustion |
Publications (1)
Publication Number | Publication Date |
---|---|
DE482819C true DE482819C (en) | 1929-09-20 |
Family
ID=7511154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES83616D Expired DE482819C (en) | 1928-01-15 | 1928-01-15 | Process and device for determining the specific calorific value of combustible materials from a temperature difference that occurs during their combustion |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE482819C (en) |
-
1928
- 1928-01-15 DE DES83616D patent/DE482819C/en not_active Expired
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WILBERT | D. EPPELSHEIMER, JR., Secretary. |