Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 171
perature of feed water (/■> — i)-D = algebraic mean temperature difference between feed water and flue gas (Ti - ^2) + {T, - h) cW{T,- T,) =Then Ti - T2 = and w = pounds of feed water per boiler horsepower-hour. (Approx. 30.)W = weight of flue gases per boiler horsepower-hour, pounds. (Approx.… … SUPERHEATERS AND ECONOMIZERS 153 S = square feet of economizer surface per boiler-horsepower. = 3.5 to 5.U = unit heat transmission of economizer tubes or B.t.u. transmitted per sq.ft. per deg. difference in mean temperature per hour.UD S = B.t.u. transmitted per hour per b.hp. UDS = xw .-. S =…
Building · Heating · Ventilation
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