University Extension Lectures 1944. Lectures on Fuels and Furnaces

B. Lomonosoff, Russia's greatest and first Academician, and discoverer of the theory of the Draught created by Chimney; and those of Professor of Engineering V. S. Grum-Grjimailo, the founder of the Hydraulic theory of the Furnace Con- struction. [...] of water-gauge, created by the chimney, can. be expressed by the following equation :—"8 LECTURES ON FUELS AND FURNACES where El is the height of the chimney in Metres 74= weight of 1 Ms of air y9=weight of 1 M3 of flue gas =temperature of the flue gas a=co-effieient of thermal expansion of gases. [...] 29 where P=static pressure of the fluid c =velocity of the flow of fluid s=height of the fluid 7=weight of 1 Ms of the fluid Girard in 1821 gave the formula to determine the loss of head due to friction while gases flow through channels, where h L 2g' d p=co-efficient of friction L=length of the tube 4F d=, F being area of the oroaspaeotion of a the channel and a perimeter. [...] The author determines the volume or rather the height of a furnace"10 LECTURES ON FUELS AND FURNACES from the account of the period of staying of hot gases in the furnace, which he thinks prc. pAirtional to the Heat- Transmission, supposing the lbw it of period between 4 to 3 seconds for different furnaces. [...] 2. Determination of the heat of combustion of the gas From the calorific value of the gas (060 Cal. /M) we find the quantity of beat developed.