20 Lw referred to in section 18 must be determined for an hour of the given day by the formula
8.94H × [2450 + 1.989(Tg – Ti)]/HHVm × 100
where
- Tg
- is the average temperature, expressed in °C, of the flue gas, as measured in the stack during that hour;
- Ti
- is the average temperature, expressed in °C, of the air introduced into the combustion chamber during that hour; and