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 immersed portion of the stirrer shall be accessible to the outside through a coupler of low thermal conductivity. Your email address will not be published. Thermostatic control of room temperature and controlled relative humidity are desirable. This test method pertains to the determination of the gross calorific value of coal and coke by either an isoperibol or adiabatic bomb calorimeter.
A step-down transformer connected to an alternating current circuit, capacitors, or batteries can be used. For manually operated calorimeters, the ignition circuit switch shall be of the momentary double-contact type, normally open except when held closed by the operator.
The results of combustion calorimetric tests of fuel for steam power plants may be expressed in terms of the International Steam Table calorie I. Sorry, your blog cannot share posts by email. An ammeter or pilot light can atsm used in the circuit to indicate when current is flowing. Nickel-chromium alloy Chrome C alloy, cotton thread, or iron wire are acceptable. Ignition Fuse – Ignition fuse of mm length and 0. The resulting concentration 0.
Suitable reducing valves and adapters for astk to 4-MPa to psig discharge pressure can be obtained from commercial sources of compressed gas equipment.
ASTM D – 04 Standard Test Method for Gross Calorific Value of Coal and Coke
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.
Automated Calorimeter – a calorimeter which has a microprocessor that takes the thermometric readings and calculates the Calibration Value and the Heat of Combustion Values.
The values stated in SI units are to be regarded as standard. The gross calorific value can be used to evaluate the effectiveness of beneficiation processes. Balance – a laboratory balance capable of weighing the analysis sample to the nearest 0. Reagent Water – Conforming to conductivity requirements for Type II of Specification D for preparation of reagents and washing of the bomb interior.
Heat Capacity – the energy required to raise the temperature of the calorimeter one arbitrary unit.
Standard Test Method for Gross Calorific Value of Coal and Coke
Sample Holder – An open d5856 or platinum, quartz, or base metal alloy. Check the pressure gauge annually for accuracy or after any accidental over pressures that reach maximum gauge pressure.
Purity of Reagents – Use reagent astmm chemicals conforming to the specification of the Committee on Analytical Reagents of the American Chemical Society in all tests. Base metal alloy crucibles are acceptable, if after three preliminary firings, the weight does not change by more than 0.
The magnifier shall have a lens and holder designed so as to minimize errors as a result of parallax. Replace cracked or significantly worn parts. Oxygen – Manufactured from liquid air, guaranteed to be greater than A comparable amount of the analysis sample is burned under the same conditions in the calorimeter. There shall be no gas leakage.
Thermometer Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division. The balance shall be checked weekly, at a minimum, for accuracy.
ASTM D5865 – 13
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. Also consult the calorimeter equipment manufacturer’s installation and operating instructions before using the calorimeter. Discussion – The heat capacity can also be referred to as the energy equivalent or water equivalent of the calorimeter.
Test Area – An area free from drafts, shielded from direct sunlight and other radiation sources. 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.
The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces.
Use the same type and length or mass of ignition fuse for calorific value determinations as used for standardization. Save my name, email, and site URL in my browser for next time I post a comment. Notify me of follow-up comments by email. Valves, gauges, and gaskets shall meet industry safety codes. Oxidation of coal after sampling can result in a reduction of calorific value.
Additional precautions are noted in Practice E These types of thermometers consist of two major subsystems. The calorific value of benzoic acid, for us in the calibration calculations, shall be traceable to a recognized certificate value.
Standard – Standard Test Method for Gross Calorific Value of Coal and Coke ASTM D –
For both subsystems, the relationship between the thermometer resistance and temperature shall be well characterized. Leave a Reply Cancel reply Your email address will not be published. For more details, consult the manufacturer.