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National (State Primary) Standard of Combustion Energy Unit

Given the acute shortage of energy resources and the growth of their cost, the issue of determining the calorific value of fuel is extremely important for both suppliers and consumers of thermal energy.

Determination of calorific value of solid and liquid fuels is carried out by the methods of "bomb" calorimetry.

Bomb calorimetry methods are widely used in energy and many other industries.

According to the method of "bomb" calorimetry, the determination of fuel calorific value is realized by burning fuel samples of known mass in working "bomb" calorimeters.

The transfer of the size of the unit of combustion energy in the working "bomb" calorimeters is carried out by burning in them the reference measures of combustion energy based on high-purity benzoic acid, which are calibrated on the National primary standard of combustion energy.

The national primary standard of combustion energy unit reproduces and stores the reference measures of combustion energy, which are then provided to the working calorimeters for their calibration in accordance with DSTU 2614-94 "Metrology. State calibration scheme for means of measuring combustion energy ".

There are no secondary standards of combustion energy in Ukraine, and calibration of working "bomb" calorimeters with the help of foreign standards costs several times more than with the help of the National primary standard of combustion energy.

Therefore, calibration of working "bomb" calorimeters, with the help of the National reference measures of the state primary standard of combustion energy, will help to reduce the huge costs of both fuel suppliers and consumers.

Metrological characteristics


from 15 kJ до 35 kJ

from 1,0 kJ to 40,0 kJ

Uncertainty by type A (uA)



Uncertainty by type B (uB)



Total standard uncertainty (uC)



Extended uncertainty (U)