ASTM-D – Download as PDF File .pdf), Text File .txt) or read online. Find the most up-to-date version of ASTM D at Engineering ASTM D Standard Test Method for Gross Calorific Value of Coal and Coke. standard by ASTM International, 10/01/ View all product details.
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The second and equally important aspect is the measurement subsystem. The same indicator shall be used for both calibration and calorific value determinations. Nickel-chromium alloy Chrome C alloy, cotton thread, or iron wire are acceptable.
Isoperibol Calorimeter – a calorimeter that operates in the isoperibol mode and aatm a microprocessor to record the initial and final temperatures and make the appropriate heat leak corrections during the temperature rise. The initial temperature before initiating the combustion and the final temperatures are recorded by the operator or the microprocessor.
Ignition Circuit – A V alternating or direct current is required for ignition purposes.
ASTM D – International Standards
Automated Calorimeter – a calorimeter which has a microprocessor that takes the thermometric readings and calculates the Calibration Value and the Heat of Combustion Values. This test method pertains to the determination of the gross calorific value of coal and coke by either an isoperibol or adiabatic bomb calorimeter.
The traceability of the heat of combustion of the benzoic acid calibrant in addition to meeting the aforementioned criteria. The first and most obvious is the temperature sensing probe itself.
The heat capacity of the calorimeter is determined by burning a specified mass of benzoic acid in oxygen. The balance shall be checked weekly, at a minimum, for accuracy. Use the same type and length or mass of ignition fuse for calorific value determinations as xstm for standardization. Test Area – An area free from drafts, shielded from direct sunlight and other radiation sources.
Inspect the bomb parts carefully after each use. Sample Holder – An open crucible or platinum, quartz, or base metal alloy. A comparable amount of the analysis sample is burned under the same conditions in the calorimeter.
Standard – Standard Test Method for Gross Calorific Value of Coal and Coke ASTM D –
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Heat of Formation – the change in heat content resulting from the formation of 1 mole of a substance from its elements at constant pressure. Thermometer Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division. To minimize convection, asm sides, top and bottom of the calorimeter vessel shall not be more than 10mm from aatm inner surface of the jacket.
Specific hazard statements are given in Section 8.
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ASTM D5865-12 – International Standards
A step-down transformer connected to an alternating current circuit, capacitors, or batteries can be used. Adiabatic Calorimeter – a calorimeter that operates in the adiabatic mode and may or may not use a microprocessor.
The values stated in SI units are to be regarded as standard.
Ignition Fuse – Ignition fuse of mm length and 0. Discussion – The heat capacity can also be referred to as the energy equivalent or water equivalent of the calorimeter. A stirrer shall be provided for uniform mixing of the water. Mechanical supports for the calorimeter vessel shall be of low thermal conductivity.
Continuous stirring for 10 min shall ast, raise the calorimeter temperature more than 0. The calorific value of benzoic acid, for us in the calibration calculations, shall be traceable to a recognized aatm value.
Check the pressure gauge annually for accuracy or after any accidental over pressures that reach maximum gauge pressure. The results of combustion calorimetric tests of fuel for steam power ast may be expressed in terms of the International Steam Table calorie I.
Also consult the calorimeter equipment manufacturer’s installation and operating aatm before using the calorimeter. Corrected Temperature Rise – the calorimeter temperature change caused by the process that occurs inside the bomb corrected d55865 various effects. Purity of Reagents – Use reagent grade chemicals conforming to the specification of the Committee on Analytical Reagents of the American Chemical Society in all tests.
Calorimeter – a device for measuring calorific value consisting of a bomb, its contents, a vessel for holding the bombtemperature measuring devicesignition leads, water, stirrer, and a jacket maintained at specified temperature conditions. Titiration Indicator – Methyl orange, methyl red, or methyl purple for indicating the end point when titrating the acid formed during combustion. Do not fire the bomb if the bomb has been dropped or turned over after loading.
For both subsystems, the relationship between the thermometer resistance and temperature shall be well characterized.