Document gaZEgorkQZy6qnxo2QV7B16oN

388 CHAPTER 20 1948 Guide . Table 1. Average Monthly and Yearly Degree-Days for Cities in the United States, Canada and Newfoundland a (Concluded) State Station Years No. of Sea Job Aug. Sept. Oct Nov Dec Jaa Feb Mar Apr Maj June wJ. sons Pa. _ 98/99-45/46 Harrisburg-------- A 98/99-45/46 Philadelphia_____ 98/99-45/46 Pittsburgh_______ 98/99^5/46 12/15-45/46 Scranton________ 00/01-45/46 R; L__ Block Island_____ 98/99-45/46 Narragansett Pier. 98/99-17/18 Providence. . . . 04/05-45/46 S. C.__ CharlestonTM____ 98/99-45/46 98/99-45/46 21/22-31/32 S.D Hnrrm 17/18-45/46 98/99-45/46 48 8 17 101 367 692 1049 1159 1105 922 591 284 68 6363 48 6 67 31' 637 99( 107; 97; 757 425 14ft '23 5412 48 48 i ; 2 36 235 544 8& 962 88: 685 378 115 17 4739 7 69 322 651 982 1042 96- 751 44- 16ft 29 54301 34 i 5 69 301 606 957 1031 92! 736 42; 144 .Z 5232 46 i 2: 117 40( 717 107' lift? 1071 862 523 213 51 6218 48 1( i] 79 3L 596 91! 103( 9& 875 618 354 108 5897 20 : 26 121 366 691 1012 in; 107' 916 622 342 113 6397 42' 6 16 101 351 668 102( 1106 102; 847 53* 23; 60 5984 48' C ( 1 47 225 421 45; 384 239 83 7 0 1866 48 ( ( 6 95 327 56C 561 482 305 126 18 2488 n ( { 9 142 393 594 651 491 411 151 39 ' -2 2890 29 ( 13 127 410 65( 684 55! 403 179 40 3059 48 10 20 159 502 962 1409 1572 1353 1039 573 271 70 7940 42/43-45/46 Rapid City._____ 98/99-45/46 Tenn._ Chattanooga_____ 98/99-45/46 Knoxville_____ A 98/99-45/46 . Memphis______ A 98/99-45/46 Texas- AhiWie A 98/99-45/46 98/99-45/46 Amarillo_______ A 98/99-45/46 26/27-45/46 Brownsville.___ A 08/09-45/46 Corpus Christi__ _ 98/99-45/46 Dallas A 13/14-45/46 05/06-45/46 ;S 1 s Fort Worth.____ A 98/99-45/46 98/99-45/46 PfllfN3tin 09/10-45/46 98/99-45/46 Point Arthur____ 17/18-45/46 San Antonio___ A 98/99-45/46 Utah 01/02-40/41 00/01-45/46 Salt Lake City___ 98/99-45/46 06/07-45/46 98/99-42/43 ' Va.___ Cape Henry_____ 98/99-15/46 Lynchburg_____ A 98/99-45/46 98/99-45/46 Richmond_______ 98/99-45/46 02/03-40/41 Wash-- North Head._____ 02/03-45/46 98/99-45/46 , Spokane__ A 98/99-45/46 98/99-45/46 Tatoosh Island___ 98/99-45/46 98/99-45/46 09/10-45/46 W. Va. Elkina A 98/99-45/46 Parkersburg_____ 98/99-45/46 Wis.__ 98/99-40/41 . 98/99-45/46 Madison.___ _ 04/05-45/46 98/99-45/46 15/16-40/41 Wyo_ Cheyenne______ A 98/99-45/46 Lander__________ 98/99-45/46 Yellowstone Park.. 04/05-40/41 47 48 48 48 48 48 48 48 20 38 48 33 41 48 48 48 37 48 29 48 40 46 48 40 45 48 48 48 48 39 ,44 48 48 48 48 48 37 48 48 ' 48 48 42 48 26 48 37 4 11 136 438 887 1317 1460 1253 971 516 23S 52 15 ( 21 192 ( 13 495 842 1171 12St 1144 981 15C 432 691 711 604 412 59f 339 109 185 39 ( ( 20 18$ 498 756 774 666 470 226 56 3 ( C 14 126 387 67C 716 600 386 157 33 1 ( f 20 17C 469 748 788 675 467 21E 55 3 C c 10 96 332 603 619 483 296 110 23 1 ] 2 42 221 548 854 861 719 546 284 107 11 c (J 2 31 227 410 458 315 185 46 5 - 0 c ( c C0 t. 0 c6 8 65 176 191 111 65 11 102 255 282 204 93 7C 293 574 600 437 281 11 1 0 17 1 0 91 15 0 c c c (J 2 35 203 413 413 262 139 31 3 6 88 366 615 615 432 291 104 14 0 1 c 0 5 79 285 553 586 463 270 97 16 c c c 0 0 0 0 14 123 290 334 255 130 27 1 1 27 160 331 361 247 150 36 2 4 67 261 496 512 401 236 80 11 0 0 0 0 0 1 27 177 328 375 254 151 37 2 0 00 c 0 1 31 171 366 390 287 148 37 2 56 234 462 494 375 214 64 4 8 0 0 6 11 156 499 832 1142 1190 944 816 567 338 97 3 5 98 371 712 1033 1093 871 716 446 236 66 23 51 209 530 870 1313 1467 1338 1111 694 339 106 62 112 283 602 947 1389 1524 1384 1176 754 405 166 (J 0 7 125 398 676 731 682 526 301 .86 6 1 2 37 230 521 799 829 732 537 287 81 12 0 0 9 129 392 668 712 650 483 254 62 5 0 1 27 196 486 780 814 722 538 278 72 8 7 13 82 352 662 916 945 836 677 410 168 35 251 229 255 350 491 642 697 597 610 505 428 312 67 69 170 365 554 704 759 637 595 436 299 160 20 37 184 -480 817 1061 1139 931 756 490 285 118 71 75 190 390 581 737 786 658 612 455 313 171 301 295 325 421 334 654 716 627 643 537 454 350 5 10 90 315 662 910 981 770 571 354 185 56 8 17 124 395 778 1050 1125 837 624 374 193 60 15 23 115 403 722 1003 1033 947 763 489 229 58 1 3 56 286 617 930 977 882 660 369 129 18 17 38 179 494 889 1329 1493 1329 1087 658 327 91 7 22 157 454 864 1339 1492 1281 990 .531 232 52 8 20 145 452 857 1296 1451 1246 1002 588 27* 66 13 17 124 411 786 1203 1329 1177 959 617 341 102 26 38 216 568 982 1427 1594 1381 [147 680 315 100 40 46 251 587 876 1144 1187 1064 996 720 460 165 27 43 265 623 1021 1400 (427 1197 1006 669 410 155 125 173 424 759 1079 1386 1464 1252 1165 841 603 334 7283 7197 3238 3658 3090 3613 2573 .4196 1679 628 965 2367 1501 2532 2355 1174 1315 2068 1352 1435 1909 6598 5650 8051 8804 3538 4068 3364 3922 5103 536? 4815 6318 5039 5857 4910 5585 5800 4928 7931 7421 7405 7079 8494 7536 8243 9605 Alta-- Calgary______ Edmonton B. C_ Vancouver____ Victoria______ Prince RupertTM Man__ Churchill..___ Winnipeg N.B_ Moncton______ Saint John.____ N. S-- Halifax._______ Ont__ Fort William Hamilton London_______ Ottawa __ Toronto_______ Windsor______ P.E.I.. Charlottetown-- P-Q~ .Montreal______ Quebec._______ Saak__ Saskatoon____ _ y. t__ Dawson..... ....... ..... ''61 0C30 70 167 441 750 1224 1593 1810 1504 1299 777 428 222 10,285 5|485 350 391 696 1187 1773 2356 2604 2288 2204 1530 1097 672 17jl48 27* 34 330 744 1302 1829 2111 1775 1531 822 397 78 10,980 8* 56 282 595 936 1373 1528 1392 1190 798 474 180 8,812 124 112 270 338 870 1271 1417 1266 [132 792 505 261 8,578 29* 22* 204 17* 43 276 595 984 1494 1646 1459 1256 1338 651 1050 1534 1696 1481 1311 lit * tn'V'v itin 7 125 726 310 91 816 T 858 ... gjj 0399 849 428 102 9*438 167 322 687 1209 1908 2440 2666 2159 1879 1092 580 246 15,355*. Estimating Fuel Consumption for Space Heating 389 The choice of. these units requires explanation and some discrimination and judgment. If the volume basis is used, the net heated space is prefer able to the gross building cubage since gross cubage includes outer walls' and certain portions of attic and basement space which- are usually un heated. In the absence of data on net heated volume a figure of 80 per cent of the gross volume may be used to obtain the estimated net heated .volume. The volume basis has been rather widely used primarily because of its facility in application. In industrial buildings it is usually easier to obtain the correct volume of a given building than to measure and evaluate the heating capacity of its heating system or calculate its maximum hourly Btu loss. The comparison of buildings on a straight volume basis does not allow for variation in exposure, type of construc tion, ratio of exposed area to cubical contents, and type of occupancy. It is considered inaccurate for purposes of estimating fuel consumption unless the buildings are of very similar nature. The calculated heat loss or its equivalent square feet of calculated radiator surface may be used as the unit. The use of the unit equivalent direct radiation is of questionable value when referring to heat transfer surfaces used in warm air furnace or central air conditioning systems.. Where steam or hot water radiation is already installed, care should be exercised in using the unit equivalent direct radiation basis for estimating, since actual installed radiation. may differ considerably from the exact radiation requirements. In view of all these considerations it is believed that the unit based on thousands of Btu of hourly calculated heat loss for the design hour is probably the most desirable, although the one most widely used seems to be units of fuel per degree-day per square foot of equivalent direct radiator surface. The equivalent heating load for the hot water supply is not included in the latter unit, but it generally includes the piping load. Since this unit is the one most widely used at present the unit fuel con sumptions given in succeeding paragraphs of this chapter make use of this unit to a considerable extent, although it should be understood that most of these units of consumption can be. transposed as desired. Estimating Gas Consumption Values of the Unit Fuel Consumption Constant (U) for gas are given in Table 2 for various gas heating values, and different types and sizes of. heating plants. They are based on an inside design temperature of 70 F and an outside design temperature of 0 F and apply only to these con ditions. For other outside design conditions corrections must be made as given in Table 5. The factors in Table 2, as corrected if necessary; are satisfactory for regions having 3500 to 6500 degree-days per heating season. In regions with less than 3500 degree-days the unit gas consumption is higher than given; where over 6500, the unit is less than given. Ten per cent addition or deduction in these cases is recommended by A .G.A. publications. Esti mates for industrial buildings where low inside temperatures are main tained cannot be made from this table. For gas heating values other than those given in Table 2, simply inter polate or extrapolate. It will also be noted that Table 2 applies only to small installations. In general the larger the installation the smaller the unit gas consumption becomes and the values in the table should be used with care, if at all, in large gas-burning installations.