The efficient use of fuel : a text book on fuels and their efficient utilization for the use of students and technical men in industry.

Great Britain. Ministry of Power

Date:: 1958

Credit: The efficient use of fuel : a text book on fuels and their efficient utilization for the use of students and technical men in industry. Source: Wellcome Collection.

864/910 (page 846)

$These liquid fuel conversion factors are those used in the Ministry of Fuel and Power Statistical Digest for the year 1955. They may apply only approxi- mately in respect of certain items relating to fuel statistics of former years. “COAL EQUIVALENTS” It is unwise to attempt to give reliable figures purporting to relate coal on a purely thermal basis to any other fuel; there can be no absolute standard for comparison. A so-called standard coal has been defined as one of calorific value 12,500 B.t.u./Ib. but such a standard has not received official recognition. Eight lb. of this standard coal=29-3 kWh. , or one _ therm.Thermally, one ton of coal is very approximately equal to one ton of coke. Calortfic values. The calorific values of fuels vary according to the quality, especially (in the case of solid fuels) according to ash content. Consequently the following (gross) calorific values and equivalent values may be regarded as typical examples only and should be used with all caution in any calculations based on them. The net C.V. of a coal is lower than the gross C.V. by an amount varying from under 1] per cent. of the gross C.V. in the case of an anthracite, to 3-4 per cent. in the case of a bituminous coal and over 6 per cent. in the case of a high- volatile coal. The difference in the case of most fuel oils is about 6 per cent Fuel Gross Calorific Value Equivalent . of 1 therm - cal./gm, B.t.u.[lb. — therms/ton lb. Anthracite ‘se im ve, 3,004 14,500 _ 325 6-90 Gas~coal és Fe .. 7,443 13,400 300 7-46 House coal .. a <j... 6,948 12,500 280 8-00 Domestic gas coke .. -- 6,943 12,500 280 7 8-00 Coal for electricity generating stations Li es of 5,972 10,750 241 8-22 therms|gal. gal. Kerosine (paraffin oil).. oe LD 20,000 1-60 0-65 Gas oil .. is is -- 10,888 19,600 1-66 0-60 Diesel oil fuel .. ff oe) LO, S58 19,600 1-66 0-60 Heavy oil fuel.. Si .. (10,416 18,750 1:85 ~~ 0°54 Coal tar fuel C.T.F. 200 ex 9,166 16,500 1-85 0:54 keal.[cu.m.t B.t.u.[cu. ft.* cu.m. cu. ft. Town gas, no steaming C.V.R. 4,804 540 5:24 185 sh pee LOLUMNE RN Pas en a 4,226 475 4-62 163 » », aS delivered... -. 4,226-4,448 475-500 —_ 210-200 Producer gas, hand operated, coke .. oe 1,112 125 22-31 800 ¥ », {from coal, mechanically operated Fy 1,468 165 19-5 650 ss », from coke os 1.157 130 21-8 770 Blast furnace gas, CO,: 11%, COAT You Sigs 2 Yas De® GOL, 819 . 92 30-6 1,080 Coke oven gas, debenzolized .. 4,671 525 5:37 190 Hydrogen - om his 2,847 320 8-9 313 Carbon monoxide “a8 ris 2,829 318 . 8-94 315 Methane ie ia a0 8,852 995 2:97 10§* Benzene (C,H,) es 45 33,274 3,740 0-755 26-6 Sulphuretted hydrogen Be 5,605 630 ee ie Ra 7 At 760 mm, Hg, 15°C., saturated. * At 30 in. Hg, 60° F., saturated. ¥$