The conversion ratio of unit weight of common energy sources in China to standard coal is 0.7 14 for raw coal and 1.429 for crude oil. Natural gas is calculated at 93 10 kcal per cubic meter, which is equivalent to1.33kg standard coal. Hydropower is calculated according to the standard coal consumption quota of thermal power over the years.

Energy conversion standard coal coefficient = actual calorific value of an energy source (kcal/kg) /7000 (kcal/kg)

Before all kinds of energy are converted into standard coal, the actual average calorific value of all kinds of energy is calculated and then converted into standard coal.

The average calorific value, also known as the average calorific value, refers to the weighted average of the measured calorific value of different kinds or varieties of energy. The calculation formula is:

Average calorific value (kcal/kg) = σ [measured low calorific value of an energy source (kcal/kg) × energy quantity (ton)]/total energy (ton)

Extended data:

The calorific value of coal is usually determined by a barrel calorimeter. The method is to take a certain quality of coal sample and put it into a card calorimeter, and fill the card calorimeter with excessive oxygen (oxygen pressure is 2.5 ~ 3.0 MPa). The cartridge is placed in an inner cylinder containing a certain amount of water, and the coal sample is ignited by electricity, so that the released heat is absorbed by the calorimeter system, and the temperature rise of the calorimeter system is measured to calculate the calorific value of coal.

According to the different combustion conditions, combustion products and states, the calorific value of coal-elastic separator can be divided into calorific value, high calorific value and low calorific value. High and low calorific value can be divided into constant volume and constant pressure.

The calorific value of coal is an important index to evaluate coal quality. Because calorific value is closely related to the degree of coalification, it is often used as an important index of coal classification (using ISO, ASTM, GB and other coal classification standards).

For thermal coal, calorific value is the most important quality index and pricing index. The process parameters such as coal consumption, heat balance and thermal efficiency of various coal-fired devices (such as boilers and industrial furnaces) must be calculated according to the calorific value of coal, and the design and technical transformation of various coal-fired furnaces and the optimization of combustion conditions must also be based on the calorific value of fuel coal.

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