Heating and ventilating buildings : a manual for heating engineers and architects . 147 153 199 IOO 1-47 147 167 175 228 no 2-34 166 188 198 257 120 1-54 2-39 184 208 219 287 130 1-57 203 230 242 3i8 140 223 2^2 266 346 150 2-53 244 276 291 378 160 2-57 265 300 316 * 410 170 286 324 34i 443 180 307 348 307 475 190 i-75 330 375 393 512 200 356 403 415 552 225 420 477 500 6so 250 2-35
Heating and ventilating buildings : a manual for heating engineers and architects . 147 153 199 IOO 1-47 147 167 175 228 no 2-34 166 188 198 257 120 1-54 2-39 184 208 219 287 130 1-57 203 230 242 3i8 140 223 2^2 266 346 150 2-53 244 276 291 378 160 2-57 265 300 316 * 410 170 286 324 34i 443 180 307 348 307 475 190 i-75 330 375 393 512 200 356 403 415 552 225 420 477 500 6so 250 2-35 493 557 587 762 275 2-34 563 037 670 872 300 2-45 3-37 654 742 780 1020 325 2-55 2 70 3-5o 740 840 882 11 so 350 2-37 3-66 835 945 995 1295 * Results divvded by iooo give approximate weight of steam condensed perhour. HEAT GIVEN OFF FROM RADIATING SURFACES. 87 has for its sine DB/BC. DB is the external radius of thepipes, BC the distance between the centres, which is usuallynot far from two diameters. In Figs. 26a, 27, and 28 the shaded. Fig. 28 areas show the position of surface, by which the radiant heatcoming from a single pipe or a single section is the distance apart to be as given above, the fol-lowing table gives the percentage of reduction in amount ofheat transmitted due to this cause, compared with single pipe : Number of Amount of Surface Probable Reduc- Rows of from which no Radi- tion in Heat Tubes. ation takes place. transmitted. Per cent. Per cent. I 16 S 2 3 55 27-5 4 66 33 5 73 6 79 39-5 47. Heat Transmission Varies with Circulation.— W. Richter made a series of experiments under the gen-eral supervision of the author for determining the rate oftransmission of heat through plates of different thickness andof different materials from steam to water. From theseexperiments it was shown that the total heat transmittedfrom steam to water was a quantity which varied with theveloci
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1910
