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.
|Published (Last):||26 August 2015|
|PDF File Size:||5.49 Mb|
|ePub File Size:||18.91 Mb|
|Price:||Free* [*Free Regsitration Required]|
The traceability of the heat of combustion of the benzoic acid calibrant in addition to meeting the aforementioned criteria. A step-down transformer connected to an alternating current circuit, capacitors, or batteries can be used. Base metal alloy crucibles are acceptable, if after three preliminary firings, the weight does not change by more than 0.
For both subsystems, the relationship asstm the thermometer resistance and temperature shall be well characterized.
Corrected Temperature Rise – the calorimeter temperature change caused by the process that occurs inside the e5865 corrected for various effects. The initial temperature before initiating the combustion and the final temperatures are recorded by the operator or the microprocessor. For more details, consult the manufacturer. The stirrer speed shall remain constant to minimize any temperature variations due to stirring.
A comparable amount of the analysis sample is burned under the same conditions in the calorimeter.
Controller – For automated calorimeter, capable of charging the bomb; filling the calorimeter vessel; firing the ignition circuit; recording calorimeter temperature before, during and after the test; recording the balance weights; and carrying out all necessary corrections and calculations.
A stirrer shall be provided for uniform mixing of the water.
Net Ashm Value net heat of combustion at constant pressureQp net – the heat produced by combustion of a substance at a constant pressure of 0. 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.
Additional precautions are noted in Practice E Your email address will not be published.
ASTM D – 13 – Standard Test Method for Gross Calorific Value of Coal and Coke
Oxidation of coal after sampling can result in a reduction of calorific asym. Notify me of new posts by email. British Thermal Unit BTU – is the amount of heat required to raise the temperature of one pound – mass lbm of liquid water at one atmospheric pressure one degree Fahrenheit at a stated temperature. Do not fire the bomb if the bomb has been dropped or turned over after loading.
The BTU used in modern steam tables is defined by the means of the relation, 1 I. Gross Calorific Value gross heat of combustion at constant volumeQv gross – the heat produced by complete combustion of a substance at constant volume with all water formed condensed to a asstm. The bomb shall be capable of withstanding a hydrostatic pressure test to 20 MPa psig at room temperature without stressing any part beyond its specified elastic limit. Thermostatic control of room temperature and controlled relative humidity are desirable.
There shall be no gas leakage.
ASTM D5865-12 – International Standards
The vessel shall be of such construction that the environment of the calorimeter’s entire outer boundaries can be maintained at a uniform temperature.
Specific hazard statements are given in Section 8. Unnecessary exposure of the samples to the air for the time of sampling or delay in analysis shall be avoided.
Heat Capacity – the energy required to raise the temperature of the calorimeter one ashm unit. This test method pertains to the determination of the gross calorific value of coal and coke by either an isoperibol or adiabatic bomb calorimeter. Thermometers – Platinum resistance or thermistor thermometers – shall be capable of measuring to the nearest 0.
ASTM D5865 – 13
No other units of measurement are included in this standard. Check the pressure gauge annually for accuracy or after any accidental over pressures that reach maximum gauge pressure.
One milliliter of this solution is 1. Isoperibol Calorimeter – a calorimeter that operates in the isoperibol mode and uses a microprocessor to record the initial and final temperatures and make the appropriate heat leak corrections during the temperature rise. Equip the oxygen supply cylinder with an approved type of safety device, such as a relief valve, in addition to the needle valve and pressure gauge used in d8565 the oxygen feed of the bomb. Replace cracked or significantly worn parts.
The heat capacity of the calorimeter is determined by burning a specified mass of benzoic acid in oxygen. Use the same type and length or mass of ignition fuse for calorific value determinations as used for standardization.