DE202019003402U1 - Calorific-bomb calorimeter - Google Patents
Calorific-bomb calorimeter Download PDFInfo
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- DE202019003402U1 DE202019003402U1 DE202019003402.1U DE202019003402U DE202019003402U1 DE 202019003402 U1 DE202019003402 U1 DE 202019003402U1 DE 202019003402 U DE202019003402 U DE 202019003402U DE 202019003402 U1 DE202019003402 U1 DE 202019003402U1
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- calorific value
- combustion
- calorimeter
- enthalpy
- dew point
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- 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
- G01N25/26—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 using combustion with oxygen under pressure, e.g. in bomb calorimeter
Abstract
Heizwert- Bombenkalorimeter, dergestalt, dass das wärmetragende Medium zur Aufnahme der Verbrennungsenthalpie aus einer Substanz mit einem Siedepunkt oberhalb des vom Verbrennungsgut zu Erwartenden Taupunkts besteht, sodass das bei der Verbrennung entstandene Reaktionswasser nicht kondensiert und so auch nicht seine Kondensationsenthalpie freisetzt, sodass also anstatt des Brennwerts der Heizwert direkt gemessen wird.Calorific value bomb calorimeter, such that the heat-carrying medium to absorb the enthalpy of combustion consists of a substance with a boiling point above the dew point expected of the combustion, so that the reaction water formed during combustion does not condense and so does not release its enthalpy of condensation, so that instead of Calorific value of calorific value is measured directly.
Description
Bei der Bombenkalorimetrie wird ein Aliquot der hinsichtlich des Brennwerts zu bestimmenden Probe zusammen mit einem Sauerstoffüberschuss innerhalb eines Metall- Druckgefäßes vollständig verbrannt. Das Druckgefäß befindet sich dabei meist innerhalb eines gegenüber der Umgebung wärmeisolierten Wasserbad bekannter Masse, dessen Temperaturerhöhung ein Maß für die innerhalb des Druckgefäßes freigesetzte Energie ist. Die Bombenkalorimetrie misst also den Brennwert, die Summe aus dem Heizwert der Probe und der Kondensationsenergie des Reaktionswassers.In bomb calorimetry, an aliquot of the calorific value sample is completely burned together with an excess of oxygen within a metal pressure vessel. The pressure vessel is usually located within a water bath of known mass, which is thermally insulated from the environment and whose temperature increase is a measure of the energy released within the pressure vessel. Bomb calorimetry thus measures the calorific value, the sum of the calorific value of the sample and the condensation energy of the reaction water.
Die für Anlagenbetreiber wichtigere Größe Heizwert muss dann nach DIN mittels einer Verbrennungsrechnung mit den Werten einer dazu nutwendigen Elementaranalyse errechnet werden.The value calorific value, which is more important for plant operators, must then be calculated according to DIN by means of a combustion calculation with the values of an elementary analysis to be used for this purpose.
Bei der Verbrennung wasserstoffhaltiger Brennstoffe entsteht also Wasser.The combustion of hydrogen-containing fuels thus produces water.
Anlagenbetreiber fürchten dieses Wasser, weil es durch darin gelöste Verbrennungsprodukte sehr korrosiv sein kann. Dies ist der Grund dafür, dass Betreiber von Anlagen, innerhalb derer eine Verbrennung stattfindet, die Temperatur des Rauchgases immer oberhalb des sogenannten Taupunkts halten, derjenigen Temperatur, unterhalb derer das Wasser des Rauchgases kondensieren würde.Plant operators fear this water because it can be very corrosive due to combustion products dissolved in it. This is the reason why operators of plants within which combustion takes place keep the temperature of the flue gas always above the so-called dew point, the temperature below which the water of the flue gas would condense.
Zur Auslegung und zum Betrieb z. B. einer Verbrennungsanlage wird daher der Heizwert und weniger der Brennwert eines Brennstoffs benötigt.For design and operation z. As an incinerator therefore the calorific value and less the calorific value of a fuel is needed.
Die Erfindung ermöglicht die direkte Bestimmung des Heizwertes einer Substanz oder eines Substanzgemisches innerhalb eines Bombenkalorimeters.The invention enables the direct determination of the calorific value of a substance or a substance mixture within a bomb calorimeter.
Dazu wird als wärmetragendes Medium nicht Wasser, sondern eine Substanz mit einem Siedepunkt oberhalb des vom Verbrennungsgut zu Erwartenden Taupunkts verwendet und die Messung oberhalb dieses Taupunkts betrieben. Da Wasser dann nicht kondensieren kann, wird so nicht der Brennwert, sondern direkt der Heizwert gemessen. Die dabei notwendigen Temperaturen werden beispielsweise durch Thermostatisierung erzeugt.For this purpose, the heat-carrying medium is not water but a substance having a boiling point above the expected dew point of the material to be burned, and the measurement is operated above this dew point. Since water can not condense, it is not the calorific value that is measured directly, but the calorific value. The necessary temperatures are generated for example by thermostatting.
Erfindungsgemäß kann dabei die Temperaturdifferenz nach erfolgter Zündung gemessen werden (Zum Zündzeitpunkt wird dabei der Thermostat ausgeschaltet) oder durch Ermittlung einer erforderlichen Kühlleistung zum Konstanthalten der Temperatur.According to the invention, the temperature difference can be measured after the ignition has been performed (the thermostat is switched off at the ignition point) or by determining a required cooling capacity to keep the temperature constant.
Das Prinzip der Erfindung auch bei anderen Brennwert- Bestimmungsmethoden anwendbar.The principle of the invention is also applicable to other calorific value determination methods.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202019001891.3 | 2019-04-30 | ||
| DE202019001891 | 2019-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE202019003402U1 true DE202019003402U1 (en) | 2019-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE202019003402.1U Active DE202019003402U1 (en) | 2019-04-30 | 2019-08-16 | Calorific-bomb calorimeter |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE202019003402U1 (en) |
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2019
- 2019-08-16 DE DE202019003402.1U patent/DE202019003402U1/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R086 | Non-binding declaration of licensing interest | ||
| R207 | Utility model specification | ||
| R150 | Utility model maintained after payment of first maintenance fee after three years |