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 is computed from temperature observations before, during and after combustion with proper allowances for thermochemical and heat transfer corrections. Thermostatic control of room temperature and controlled relative humidity are desirable.

Koehler K88900 / K88990 Bomb-type Calorimeter

Test Room – The room in which the calorimeter is operated must be free from drafts and not subject to sudden temperature changes. Place the cup in the curved electrode and arrange the fuse wire so that the central portion of r240 loop presses down on the center of the tape disk. Determine the sulfur content of the sample if it exceeds 0. Looking for a specific close-up?

Koehler K / K Bomb-type Calorimeter (ASTM D, D, D, D, D) | Labequip

Thermometers – Temperatures in the calorimeter and jacket shall be measured with the following thermometers or combinations thereof:. Net Heat of Combustion – the quantity of energy released when a unit mass of fuel is burned at constant pressure, with all of the products, including water, being gaseous.

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The bomb must be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. Corrections shall be reported to 0.

Time intervals are not recorded as they are qstm critical in the adiabatic method. Leave a D40 Cancel reply Your email address will not be published. Weigh the sample to the nearest 0. Tape – place a piece of pressure-sensitive aetm across the top of the cup, trim around the edge with a razor blade, and seal tightly.

This shall have a lens and holder designed so as not to introduce significant errors due to parallax. Its size shall be such that the bomb will be completely immersed in water when the calorimeter is assembled. For highly volatile fluids, reduce loss with use of tape or gelatin capsule mineral oil.

Do not mix gases in cylinders. Each of these thermometers shall have been tested for accuracy at intervals no larger than 2.

ASTM D – International Standards

If the heat of combustion is required on a clean fuel, filter the sample to remove free water and insoluble ash before testing. Observations, C240 Jacket Method – Assemble the calorimeter in the jacket and start the stirrers.

Fill a hypodermic syringe with the sample. It must be constructed so that any water evaporating from the jacket will not condense on the calorimeter.

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Some operators aztm a lower initial temperature so that the final temperature is slightly below that of the jacket. Avoid prolonged breathing of vapor or spray mist. The amount of water g is usual can be most satisfactorily determined by weighing the calorimeter vessel and water together on a balance.

Do not purge the bomb to remove entrapped air Warning – be careful not to overcharge the bomb. Place the cup in the curved electrode and arrange the fuse wire so that the central portion of the loop contacts the capsule asttm oil.

Remove from the balance with forceps. Weight of Sample – Control the weight of sample including the auxiliary fuel so that the temperature rise produced by its combustion will be equal to that of 0. Either isothermal or adiabatic calorimeter jackets can be used.

Pressure-Sensitive Tape – Cellophane tape 38mm 1. Under normal conditions, this test method is directly applicable to such fuels as aetm, kerosene, Nos.

Temperatures can be measured in degrees Celsius. Oxygen Purification Device – Commercial oxygen produced form liquid air can generally be used without purification.