The School House ; Its Heating And Ventilation
The School House ; Its Heating And Ventilation
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Section 83 of Chapter 102 of the Revised Laws of Massachu- setts, relative to the licensing of engineers and firemen, is as fol- lows : ^' The horse-power of a boiler shall be ascertained upon the basis of three horse-power for each square foot of grate surface, for a power boiler, and on the basis of one and one-half horse- power for each square foot of grate surface, if the boiler is used for heating purposes exclusively. The engine power shall be reckoned upon a basis of a mean effective pre...ssure of forty pounds per square inch of piston for a simple engine ; fifty pounds for a condensing engine ; and seventy pounds for a compound engine, reckoned upon area of high pressure piston.'* A pound of coal when properly burned g'ives from 13,000 to 14,000 B.T.U. In actual practice, however, only 40 to 50 per cent of this is obtainable as effective in furnaces.
THE SCHOOL HOUSE. 75 In good mill practice one pound of coal, when well burned, will give from 8,000 to 9,000 B.T.U., and 12 pounds of hard coal burned per hour per square foot of grate surface is considered ordinary practice.
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You can find similar books in the "Read Also" column, or choose other free books by Moore, Joseph Augustus, 1844- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Section 83 of Chapter 102 of the Revised Laws of Massachu- setts, relative to the licensing of engineers and firemen, is as fol- lows : ^' The horse-power of a boiler shall be ascertained upon the basis of three horse-power for each square foot of grate surface, for a power boiler, and on the basis of one and one-half horse- power for each square foot of grate surface, if the boiler is used for heating purposes exclusively. The engine power shall be reckoned upon a basis of a mean effective pre...ssure of forty pounds per square inch of piston for a simple engine ; fifty pounds for a condensing engine ; and seventy pounds for a compound engine, reckoned upon area of high pressure piston.'* A pound of coal when properly burned g'ives from 13,000 to 14,000 B.T.U. In actual practice, however, only 40 to 50 per cent of this is obtainable as effective in furnaces.
THE SCHOOL HOUSE. 75 In good mill practice one pound of coal, when well burned, will give from 8,000 to 9,000 B.T.U., and 12 pounds of hard coal burned per hour per square foot of grate surface is considered ordinary practice.
What to read after The School House ; Its Heating And Ventilation?
You can find similar books in the "Read Also" column, or choose other free books by Moore, Joseph Augustus, 1844- to read onlineMoreLess
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