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Ciudad<br />

- Minneapolis<br />

Concord, N.H<br />

Denver<br />

Chicago<br />

St. Louis<br />

New York<br />

San Francisco<br />

At<strong>la</strong>nta<br />

Los Angeles<br />

Phoenix<br />

Houston<br />

Miami<br />

TABLA 1-3<br />

GANA!CIAS CAL2A .ALES PARA TECHOS<br />

PUR P:E 2CIUD<br />

Latitud Radiaci6n Grados a =<br />

So<strong>la</strong>r Dias<br />

Langley's bulbo<br />

seco<br />

superior<br />

78 F<br />

Ganancia cal6rica Btu/pie<br />

a trav6E del techo<br />

U = 0.19<br />

U =<br />

0.3 a = 0.8 a = 0.3<br />

45N 325 2 500 2 008 8 139 1 119<br />

43"N 300 1 750 1 892 7 379 1 043<br />

40"N 42E 4 055 2 458 9 859 1 348<br />

42"N 350 3 0IC0 2 104 7 918 185<br />

39"N 75 6 400 4 059 12 075 2 326<br />

41°!. 350 3 000 2 696 9 274 1 534<br />

38 N 410 3 O0O 566 5 914 265<br />

34*N 390 9 400 4 354 14 060<br />

4"N<br />

2 482<br />

470 2 O00 1 733 10 025 921<br />

33*!N 520 24 448 12 149 24 385<br />

30"N<br />

7 256<br />

430 11 500 7 255 20 931 4 176<br />

26"!. 451 10 771 9 009 24 594 5 315<br />

a - es el coeficiente de abborci6n del material de construcci6n<br />

a = 0.3 (t<strong>la</strong>nco)<br />

a = 0.5 (colores c<strong>la</strong>ros ta! como anarillo, verde, etc.)<br />

a - 0.8 (colores obscuros<br />

2 /afo<br />

0.12 = 0.8<br />

4 728<br />

4 257<br />

5 680<br />

4 620<br />

? 131<br />

5 465<br />

3 354<br />

8 276<br />

5 759<br />

14 649<br />

12 369<br />

14 716

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