Document zdrnkX98kGRVZo2M4aJGz73yB

HEATINC VENTILATINC AIR CONDITIONING CUIDE 1940 Table 1 Design Dry- and Wet-Bulb . Temperatures, Wind Velocities, and Wind Directions for June, July, August, and September Stats ClTT Design Drt-Bulb Design Wet-Buld SnuMEB Wind Prevailing Velocttt Stoner Wind MPH Direction Ala................ Birmingham...... ........-........... Mobile..................................... Ariz......-....... Phoenix.............................;..... Ark................ Little Rock................. _......... Qilif.............. Los Angeles............................ San Francisco........................ Colo--.......... Denver.... ................................ Conn............ New Haven............................ Dela........ -- Wilmington........................-- D. C.............. Washington............................ Fla................. Jacksonville....................:....... Tampa..................................... Ga.......-....... Atlanta...... ............................. Savannah.-............................. Idaho______ Boise--...................................... 111............ Chicago_______ ........ .......... Peoria................. .... Ind------------- Indianapolis........ ........-......... Iowa Des Moines.........~................. Kansas___ -- Wichita............................... . Ky................. Louisville______ ______ ____ La.................. New Orleans.................-........ Shreveport..... ........................ Maine.-........ Portland.... ............................. Md________ Baltimore--............................. Mass............. Boston............................,........ Mich............. Detroit.................................... Minn............ Minneapolis................ ........... Miss.............. Vicksburg............................... Mo................ Kansas City..... ...................... St. Louis.--------- Mont..... ....... Helena............... Nebri............ Lincoln............... Nev__ _____ Reno.... .............. N. H...........- Manchester___ N.J-. N. Y, Trenton........... Albany............... Buffalo.......... New York......... N. M............ Santa Fe............ n. c....... Asheville............ Wilmington....... N. Dak_____ Bismarck........... Ohio.............. Cincinnati......... Cleveland-------- Okla Oklahoma City. Oreg--.... Pa.............. Portland--.......... Philadelphia___ Pittsburgh____ R. I........... Providence____ S. C.......... Charleston........ Greenville_____ S. Dak___ Sioux Falls____ Tenn......... Chattanooga.... Memphis........... 95 95 105 95 90 90 95 ' 95 95 95 95 94 95 95 95 95 95 95 95 100 95 95 100 90 95 92 95 . 95 95 100 95 95 95 95 90 95 92 93 95 90 90 95 95 95 95 101 90 95 95 93 95 95 95 95 95 78 80 76 78 70 65 64 75 78 78 78 79 76 78 65 75 76 76 77 75 76 79 78 73 78 75 75 75 78 76 78 67 75 65 73 78 75 75 75 65 75 79 73 78 75 76 65 78 75 75 80 76 75 77 78 5.2 8.6 6.0 7.0 6.0 11.0 6.8 7.3 9.7 6.2 8.7 7.0 7.3 7.8 5.8 10.2 8.2 9.0 6.6 11.0 8.0 7.0 6.2 7.3 6.9 9.2 10.3 8.4 6.2 9.5 9.4 7.3 9.3 7.4 5.6 10.0 7.1 12.2 12.9 6.5 5.6 7.8 8.8 6.6 9.9 10.1 6.6 9.7 9.0 10.0 9.9 6.8 7.6 6.5 7.5 S SW W NE SW SW S S SW S SW E NW SW NW NE S SW SW S SW SW S S SW SW SW SE Ss W SW SW S w NW SsW SW SW SE SE SW NW SW s S NW SW NW NW SW NE S SW SW 142 CHAPTER 8. COOLING LOAD Table 1. Design Dry- and Wet-Bulb Temperatures, Wind Velocities, and Wind Directions for June, July, August, and September (Concluded) State Cm Design Dry-Bulb Design Wet-Bulb Summer Wind Prevailing Velocity Stoker Wind MPH Dibection Texas. 100 78 s El Paso- .......................... Galveston.... .................. Houston... ...........-........ too 95 95 69 80 78 6.9 E 9.7 S 7.7 S San Antonio.................. 100 78 74 SE Utah...... Salt Lake City..._......... 92 63 SE Vt--------Va.......... Burlington..................... Norfolk. ...................... 90 73 S 95 78 10.9 S Wash..... . W. Va.... Wise------ Richmond.................. Seattle.-- .................... Spokane......................... Parkersburg................ Madison................. 95 78 85 65 90 65 95 75 95 75 6.2 SW 7.9 S 6 5 SW 5.3 SE 8 1 SW Milwaukee. ............... 95 75 10 4 S Wyo____ Cheyenne. ............ 95 65 9.2 S The components of heat gain, classified by source are further classified as sensible and latent heat gain. The first two components fall into the classification of sensible heat gain, that is, they tend to raise the temperature of the air within the structure. The last three components not only produce sensible heat gain but they may also tend to increase the moisture content of the air within the structure. Normal Heat Transmission By normal heat transmission, as distinguished from solar heat trans mission is meant the transmission of heat through windows, walls, partitions, etc. from without to interior of enclosure by virtue of difference between outside and inside air temperatures. This load is calculated in a mariner similar to that described in Chapter 7 (except that flow of heat is reversed) by means of the formula: where flt = A U (k, - 0 (I) St = heat transmitted through the material of wall, glass, floor, etc., Btu per hour. A - net inside area of wall, glass, floor, etc., square feet. t = inside temperature, degrees Fahrenheit. U coefficient of transmission of wall, glass, floor, etc., Btu per hour per square foot per degree Fahrenheit difference in temperature (Tables 3 to 13, Chapter 5). Solar Heat Transmission Calculations of the solar heat transmitted through walls and roofs are difficult to determine because of periodic character of heat flow and time lag due to heat capacity of construction. 143