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 results of combustion calorimetric tests of fuel for steam power plants may be expressed in terms of the International Steam Table calorie I. Check the pressure gauge annually for accuracy or after astj accidental over pressures that reach maximum gauge pressure.
Oxygen – Manufactured from liquid air, guaranteed to be greater than Corrected Temperature Rise – the calorimeter temperature change caused by the process that occurs inside the bomb corrected for various effects.
Notify me of new posts by email. Your email address will not be published. For manually operated calorimeters, dd5865 ignition circuit switch shall be of the momentary double-contact type, normally open except when held closed by the operator. Leave a Reply Cancel reply Your email address will not be published. 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.
Inspect the bomb parts carefully after each use. During ignition of a sample, the operator shall not extend any portion of the body over the calorimeter.
It determines when the calorimeter is in equilibrium and ignites the sample and determines when the calorimeter has reached equilibrium after ignition. This test method pertains to the determination of the gross calorific value of coal and coke by either an isoperibol or adiabatic bomb calorimeter.
Standard Test Method for Gross Calorific Value of Coal and Coke
Crucible Liner – Quartz fiber or alundum for lining the crucible to promote complete combustion of samples that do not burn completely during the determination of the calorific value. Controller – For automated calorimeter, capable of charging the bomb; r5865 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.
Specific hazard statements are given in Section 8. The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the axtm surfaces.
Ignition Circuit – A V alternating or direct current is required for ignition purposes.
ASTM D – 13 Standard Test Method for Gross Calorific Value of Coal and Coke
An ammeter or pilot light can be used in the circuit to indicate when current is flowing. Ignition Fuse – Ignition fuse of mm length and 0. The initial temperature before initiating the combustion and the final temperatures are recorded by the operator or the microprocessor. Heat Capacity – the energy required to raise the temperature of the calorimeter one arbitrary unit. In particular, lignite and sub-bituminous rank coal samples may experience greater oxidation effects than samples of higher rank coals.
Valves, gauges, and gaskets shall meet industry safety codes. The following precautions are recommended for safe calorimeter operation. The resulting concentration 0. The same indicator shall be used for both calibration and calorific value determinations. Platinum or palladium wire, 0. The BTU used in modern steam tables is defined by the means of the relation, 1 I. The gross calorific value can be used to compute the total calorific content of the quantity of coal or coke represented by the sample for payment purposes.
For manually operated calorimeters, the ignition switch shall be depressed only long enough to fire the charge.
ASTM D5865-12 – International Standards
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 regulating the oxygen feed d58865 the bomb. Save my name, email, and site URL in my browser for next time I post a comment. Replace cracked or significantly worn parts.
Combustion Bomb – Constructed of materials that are not affected by the combustion process or the products formed to introduce measurable heat input or alteration of end products. The traceability of the heat of combustion of the benzoic acid calibrant in addition to meeting the aforementioned criteria.
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. The vessel shall be of such construction that the environment of the calorimeter’s entire outer boundaries can be maintained at a uniform temperature. The second and equally important aspect is the measurement subsystem. Net Calorific Value net heat of combustion at constant pressureQp net – the heat produced by combustion of a substance at a constant pressure of 0.
The values stated in SI units are to be regarded as standard. Suitable reducing valves and adapters for 3- to 4-MPa to psig discharge pressure can be obtained from commercial sources of compressed gas equipment.
No other units of measurement are included in this standard. To minimize convection, the sides, top and bottom of the calorimeter vessel shall not be more than 10mm from the inner surface of the jacket. The first and most obvious is the temperature sensing probe itself. Thermometers – Platinum resistance or thermistor thermometers – shall be capable of measuring to the nearest 0.
ASTM D – 04 Standard Test Method for Gross Calorific Value of Coal and Coke
Reagent Water – Conforming to conductivity requirements for Type II of Specification D for preparation of reagents and washing of the bomb interior. The calorific value of the analysis sample is computed by multiplying the corrected temperature rise, adjusted for extraneous heat effects, but the heat capacity and dividing by the mass of the sample.
One milliliter of this solution is 1. Automated Calorimeter – a calorimeter which has a microprocessor that takes the thermometric readings asm calculates the Calibration Value and the Heat of Combustion Values. Replace O-Rings and valve seats in accordance with manufacturer’s instruction.
The balance asm be checked weekly, at a minimum, for accuracy.