ASTM D240 PDF

STANDARD TEST METHOD FOR HEAT OF COMBUSTION OF LIQUID HYDROCARBON FUELS BY BOMB CALORIMETER. This test method. The heat of combustion is a measure of the energy available from a fuel. ASTM D Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter.

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The heat of combustion as determined by this test method is designated as one of the chemical and physical requirements of both commercial and military turbine fuels and aviation gasoline. Adequate facilities for lighting, heating, and ventilating shall be provided. Observations, Adiabatic Jacket Method – Assemble the calorimeter in the jacket and start the stirrers.

Record the initial temperature and fire the charge. Discard the test if unburned sample or sooty deposits are found. Either isothermal or adiabatic calorimeter jackets can be used. Available request a quote. Removable bomb calorimeters are the more traditional design most users will recognize.

The range of such craft between refueling is a direct function of the heat of combustion and density of the fuel. A microprocessor-based controller monitors both the temperature of the bucket and the jacket and performs the necessary heat leak corrections that result from differences in these two temperatures. The direct rays of the sun shall not strike the jacket or thermometers. The same ambient conditions must be maintained for all experiments, including standardization.

Weigh the sample to the nearest 0. The heat of combustion is computed from temperature observations before, during and after combustion, with proper allowance for thermochemical and heat transfer corrections.

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Do you need a bomb type or differential scanning type? Vapors may cause flash fire. Tape – place a piece of pressure-sensitive tape across the d2400 of the cup, trim around the edge with a razor blade, and seal tightly.

It can achieve the highest level of precision and accuracy of any oxygen bomb calorimeter. Sodium Hydroxide aztm Warning – Corrosive.

Each of these thermometers shall be tested for accuracy at intervals no larger than 1C over the entire graduated scale and corrections reported to 0.

Reweigh the cup with capsule and sample. Masses are measured in grams and no buoyancy corrections are applied.

A knowledge of this value is essential when considering the thermal efficiency of ast for producing either power or heat. Heat of combustion is determined in this test method by burning a weighed sample in an oxygen bomb calorimeter under controlled conditions. Remove and measure the combined pieces of unburned firing wire, and subtract from the original length.

ASTM D – International Standards

Release regulator tension before opening cylinder valve. Sodium Hydrozide Solution – Dissolve 3. General Use laboratory apparatus balances, baths, blenders, centrifuges, chart recorders, freezers, fume hoods, furnaces, glassware washers, glove boxes, mixers, moisture testing, ovens, pumps, shakers, vacuum equipment, water purification Calorimeter – The calorimeter vessel shall be made of metal preferably copper or brass with a tarnish-resistant coating, and with all outer surfaces highly polished.

Time intervals are not recorded as they are not critical in the adiabatic method.

Place the cup in the curved electrode and arrange the fuse wire so that the central portion of the loop contacts the capsule and oil. Determine the corrections for nitric acid HNO3 and firing wire as described and substitute.

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Firing Circuit – A 6 to 16V alternating current is required for ignition purposes with an ammeter or pilot light in the circuit to indicate when current is flowing.

ASTM D240-09 – International Standards

Avoid buildup of vapors and eliminate all sources of ignition, especially non-explosion-proof electrical apparatus and heaters. Do not exceed the sample size limits. E240 procedure is acceptable, provided it is used in all tests, including standardization.

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The products of combustion, in oxygen, are carbon dioxide, nitrogen oxides, sulfur dioxide, and water, all in the gaseous state. Temperatures can be recorded in either degrees Fahrenheit or ohms or other units when using electric thermometers. Stand away from outlet when opening cylinder valve. Avoid prolonged breathing of vapor or spray mist. It may be measured in minutes and seconds. Gross Heat of Combustion – the quantity of energy released when a unit mass of fuel is burned aztm a constant volume enclosure, with the products being gaseous, other than water that is condensed to the liquid state.

This test method covers the determination of the heat of combustion of liquid hydrocarbon fuels ranging in volatility from that of light distillates to that of residual fuels.

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