| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Heat value | Mechanical Engineering | Energy produced per unit amount of a substance when the substance undergoes complete combustion; cf. net calorific value; gross calorific value. Source: European Union. (references) | |
| Heat value | Mining | The amount of heat obtainable from a fuel and expressed, for example, in British thermal units per pound. (references) | |
| High heat value | Physics | Net calorific value plus the quantity of heat per unit mass produced when the water vapor is condensed at 20 C; In the case of solid and liquid fuels of low volatility, the heat produced by combustion of unit quantity, at constant volume, in any oxygen-bomb calorimeter under specified conditions. Source: European Union. (references) | |
| Low heat value | Chemical Industry | 1: The amount of heat liberated by the complete combustion, under specified conditions, of unit volume of a gas, the water produced by the combustion of the gas being assumed to remain as a vapor, the other products of combustion being referred to the standardized test conditions as applied in different countries. Hence the net calorific value is the gross calorific value less the latent heat of evaporation of the water that formed during combustion of the fuel (2). Source: European Union. (references) | |
| 2: The number of heat units measured as being liberated when unit mass of fuel is burned in oxygen saturated with water vapor in a bomb under standardized conditions, the residual materials being taken as gaseous oxygen, carbon dioxide, sulphur dioxide and nitrogen, water as water vapor and ash. The standardized conditions are defined in ISO-R-1928-71. The international reference temperature is 25°C (1). Source: European Union. (references) | |||
| Low heat value | Environment | Net heat of combustion (Hunt, Energy dict. ). Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
