What is BS 7420 - Guide for determination of calorific values of C about?
BS 7420 gives guidance on the determination of calorific values of solid, liquid and gaseous fuels. BS 7420 includes definitions of different calorific values calculated on the basis of either constant pressure or constant volume, and with the water produced present either in the liquid or the vapour phase. The standard gives conditions for the experimental determination of calorific values and presents details of how to interconvert numerical values of differently defined calorific values.
Note: It should be noted that the term “calorific value” is the legal and contractual term used in common practice by the solid fuel and gas industries, whereas the oil industry uses the alternative term “heat of combustion”.
Who is BS 7420 - Guide for determination of calorific values of solid, liquid and gaseous fuels for?
BS 7420 on guide for determination of calorific values of solid, liquid and gaseous fuels is useful for:
- The solid, liquid and gaseous fuels industry
- Producers and suppliers of fuels
- Testing laboratories
- Lorem Ipsum
Why should you use BS 7420 - Guide for determination of calorific values of solid, liquid and gaseous fuels?
The amount of heat which would be released by complete combustion of unit quantity of a fuel under specified conditions is termed the calorific value of that fuel for those conditions. This may be determined directly by calorimetry or indirectly by inferential methods. The most useful basic expression of calorific value is often considered to be the heat released by complete combustion of a unit quantity of the fuel at a defined pressure and a specified reference temperature.
BS 7420 gives definitions of four calorific values:
- Gross calorific value at constant pressure
- Net calorific value at constant pressure
- Gross calorific value at constant volume
- Net calorific value at constant volume
The definitions of calorific value given in BS 7420, take into account the basis on which the quantity of fuel is measured, namely, mass for solid and liquid fuels, and volume for gaseous fuels; they also take into account the conditions under which the fuels can be burned completely.
It is sometimes necessary to convert a calorific value determined for a known set of specified conditions to the corresponding calorific value for a different set of conditions, and BS 7420 gives guidance on calculations by means of which this may be achieved.