Document 3NENg9OLEgmdrvvmYRqXv518y

Fuels and Combustion Table 5. Approximate Gravity and Calorific Value of Standard Grades of Fuel Oil COMMERCIAL . Standard No. i 2 3 5 6 Approximate Cratot Range A. P. 1; 38-40 34-36 28-32 18-22 14-16 Calorific Value Btu Per Gallon 136,000 138,500 141,000 148,500 152,000 331 a combination of certain proportions of gases produced by two or more processes. Representative properties of gaseous fuels commonly used, in domestic heating are presented in Table 6. Natural gas is the richest of the gases and contains from 80 to 95 per cent methane, with small percentages of the other combustible hydro carbons. In addition, it contains from 0.5 to 5.0 per cent of C02, and from 1 to 12 or 14 per cent of nitrogen. The heat value varies from 1000 to 1200 Btu per cu ft, the majority of natural gases averaging about 1000 Btu per cu ft. Table 6 shows typical values for the four main oil fields, although values from any one field vary materially. Table 6 also gives the calorific values of the more common types of manu factured gas. Most states have legislation which controls the distribution Table 6. Representative Properties of Gaseous Fuels, Based on Gas at 60 F and 30 in. Hg Gas Natural gas-- California Btu per Cu Ft High (Gross) (Nrt) Specific Am Required --Gravitt. fob COMBUS Air TION, 1.00 (Cu Ft) Pbodcctb or Combustion Cubic Feet Total COi HtO with N, Ulti mate <70* Dry Basis Theoretical FPlEaRmAeTUTKrEm,* ' (F DEO) 1200 1085 6.67 11.26 1.24 2.24 12.4 12.2 3610 Natural gas--. Mid-Conti nental " '970 870 0.57 9.17 0.97 1.92 10.2 11.7 3580 Natural gas-- Ohio 1130 1025 0.65 10.70 1 17 2.16 11.8 12.1 3600 ' Natural gas-- Pennsylvania 1130 1025 0.71 11.70 1.30 2.29 12.9 12.3 3620 Retort coal gas 570 510 0.42 Coke oven gas 590 520 0.42 5.00 5.19 0.50 1.21 0.51 1.25 5.7 11.2 5.9 11.0 3665 3660 Carbureted water gas Blue water gas 540 495 0.65 300 280 0.53 4.37 2.26 0.74 0.75 5.0 17.2 0.46 0.51 2.8 22.3 3815 3800 Anthracite pro ducer gas 135 125 0.85 1.05 0.33 0.19 1.9 19.0 3000 Bituminous producer gas Oil gas 150 140 0.86 575 510 0.35 1.24 4.91 0.35 0.19 0.47 i .21 2.0 19.0 5.6 10.7 316.0 3725