This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...are being used for indirect heating in many cases, replacing the old-fashioned pipe coil heaters. The efficiency of these heaters is, according to tests, about the same as that of the pipe coil heaters and hence formulas 45 and 46 would apply in the same way for both kinds. Table XVII gives values of heat transmission ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...are being used for indirect heating in many cases, replacing the old-fashioned pipe coil heaters. The efficiency of these heaters is, according to tests, about the same as that of the pipe coil heaters and hence formulas 45 and 46 would apply in the same way for both kinds. Table XVII gives values of heat transmission for various sections, taken from tests upon Vento cast iron heaters set up in banks, and is added as a means of comparison with the values quoted on the pipe coll heaters. TABLE XVII. Rate of Transmission of Heat, K, through Vento Coils. Steam 227'. air entering at 0. In applying these values of K to formula 45 it should. t ] U be remembered that U would be used instead of Applicatton 1. Where Heating Only is Considered.--Referring to Table XXV let H for the entire building be 1483251. Then from Art. 104, Q--1156935, by formula 42, H' = 2966502 and by formula 46, the coil surface is With three lineal feet of 1 inch pipe per square foot of surface, we have 6666 lineal feet of coils in the heater. Application 2. Where Ventilation is Considered.--Assume 1100 People in the building on a zero day and Q' = 2000000, then, H' = 1483251 + 1.27 X 2000000 = 4023251 and 4023251:3014 sq. feet = 9042 lineal feet. This value is probably the greatest amount that.would be needed. In such a case, when the rooms were supplied with extra air, the register temperatures over the entire building may be less than 140 degrees. Suppose in this case the temperature to be, by formula 43, t = 70 + 55 X 1483251-=-2000000 = 111, then 4023251 B = = 2760 sq. ft. = 8280 lineal ft / 111 + 0 8.5 (227 2 In using this formula, the value X = 140 is to be recommended wherever part of the rooms are not provided with extra amounts of ventilating air. By so doing the ducts and ...
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Seller's Description:
Good. Good Leather. SCARCE ORIGINAL 1910 PRINTING. Pages are clean and unmarked. Gilt page edges. Covers show light edge wear with rubbing.; 100% Satisfaction Guaranteed! Ships same or next business day!
