Document jN82bXm7nLXLaRMaYRzaeGmyZ

350 CHAPTER 14 o 8 o o CttOCIFIC VALUE Of FUEL ta 5 2 J} 5 B.T.U. PER AS FIREO 1950 Guide Automatic Fuel Burning Equipment 351 GAS CUBIC FEET PER HOUR F u e l* POUNOS PER HOUR OIL* GALLONS PGR HOUR (143,400 0.T.U. PR GALLON> . GROSS OUTPUT * HUN0RE0 FEET STEAM RADIATION <" l l" l l i i i i i i i i-T-m ~r i i--i--i--i--j--it | | | | i | | | O5 10 IS , 20 25 30 GROSS OUTPUT ' HUNDRED FEET WATER RADIATION Fig. 21. Coal Fuel Burning Rate Chart ............................................................................. * i I I I I 0.2-4 6 8 10 12 14 . . GROSS OUTPUT - HUNDREO FEET STEAM RADIATION I 16 -i i i * i i --< i i ~ i i i r* i i i i i i i i i1 't i i 0 5 -10 15 20 25 GROSS OUTPUT-HUNDRED FEET WATER RAOIATION IT 18 II .20 i~1 i*~i r i i 30 . Fig. 22. Oil Fuel Btoning Rate Chart* GROSS OUTPUT* HUNDRED FEET STEAM RADIATION t | [ | j | j | 1 -|---- 1 i | t f | | | *| |` 1*^ | | I I I I I I . < > oS 10 6 20 25 30 GROSS OUTPUT - HUNOREO FEET WATER RAOIATION Fig.-23. Gab Fuel Burning Rath Chart The correct fuel burning rate can be determined directly from the several charts for oil or gas burning installations, as these customarily operate on a strictly intermittent basis. These fuel burning devices usually introduce the fuel at a single fixed rate during the on periods and t.his rate should be sufficient to carry the gross load. In the case of coal stokers, which are usually capable of variable rates of firing, it is desirable to operate at as low a rate as weather conditions will permit, but the maxi mum firing rate of the stoker should be sufficient to carry the gross load. This rate may be determined by the same method as used for oil or gas. REFERENCES 1 Domestic Burners for Pennsylvania Anthracite (Underfeed Type), (U. S. Depart ment of Commerce, National Bureau of Standards, Commercial Standard No. CS48-40). 2 Stoker Manufacturers Association Manual: Industry Standards, Recommended Practices, Technical Information. Published by Stoker Manufacturers Association, 307 N. Michigan Ave., Chicago 1, 111. * Code for Determination of Rated Capacities of Anthracite Underfeed Stokers, adopted June 1,1944, and a Code for Determination of Rated Capacities of Bitumi nous Underfeed Stokers, adopted May 3, 1944. See Stoker Manufacturers Associa tion Manual. 4 Automatic Mechanical Draft Oil Burners Designed for Domestic Installations (U S Department of Commerce, National Bureau of Standards, Commercial Standard No CS75-42). Flue Connected Oil Burning Space Heaters Equipped with Vaporiz ing Pot Type Burners (U. S. Department of Commerce, National Bureau of Standards, Commercial Standard No. CS101-43). Warm-Air Furnaces Equipped with Vaporiz ing Pot-Type Oil Burners (U. S. Department of Commerce, National Bureau of Standarde. Commercial Standard No. CS(E)104-46). Oil-Burning Floor Furnaces Equip ped with Vaporizing Pot-Type Burners ((/. S. Department of Commerce, National Bureau of Standards, Commercial Standard C. S. 113-44).