Document qm8qja4XJR8rNzJ4NqyEqzVLG

Heating Ventilating Air Conditioning Guide 1938 Table 1. Average Maximum Water Main Temperatures3 State Cm Tump. F Statb Ala....... Ariz----Calif..... Colo-- Conn.. D. C.. Del-- Fla-- Ga.._. IU.__ Ind....... Iowa___ Kans__ Ky.. La... Me.... Md-- Burraingham..... -- Mobile..... .............. Phoenix.... ............. Tucson--............... Anaheim................. Berkeley.--............. Fresno.................... Fullerton....... ......... Glendale. Los Angeles...... . Oakland.............. Ontario.............. Pasadena............ Pomona....... ...... Riverside........... Sacramento........ San Bernardino.. San Diego.--...... San Francisco.... Whittier____ ___ Denver....... ....... Bridgeport-....... Hartford............ New Haven...... : Waterbury........ . Washington...... Wilmington....... Jacksonville----- Miami............... Tampa.............. Atlanta.-........... Macon_______ Chicago______ Cicero....... ...... Evanston........ Peoria-............ Rockford--.... Springfield--... Evansville___ Gary. Indianapolis..... South Bend..... Terre Haute__ Cedar Rapids-- Des Moines..... Sioux City....... Concordia------Kansas City._ Topeka______ Wichita______ Louisville__ Baton RougeNew Orleans... Augusta-- Baltimore...-- 84 73 81 80 60 69 72 75 68 75 69 70 82 75 78 72 65 82 62 75 75 66 73 76 72 84 83 80 80 77 87 80 76 76 73 67 59 82 86 75 80 61 82 78 77 62 57 86 88 72 85 85 85 60 67 Mass-- Mich.. MumMo..... Nebr.. Nev.._ N. H.. N. J... N. Y... N. C._ N. M.. Ohio-- Cm Temp. F Boston______ Cambridge.... Fall River.-- Lowell............ LynnNew Bedford.. Salem............. Worcester.----- Detroit.., FlintGrand Rapids.... Highland Park-- Jackson--........... Kalamazoo------- Lansing._______ Saginaw............Duluth.. Minneapolis........... St. PauL__.--........ Jefferson City....... Kansas City......... St. Joseph..... ........ St. Louie............... Springfield............. Lincoln.................. Omaha................... Reno Manchester------... Jersey City.-------Newark................ Paterson--............ Trenton..... .......... Albany....... ......... Buffalo____ ___ Jamaica........ ....... Mt. Vernon......... New Rochelle.---- New York.--------Rochester---------Schenectady-...... Syracuse...... ......... Utica... Yonkers............. Asheville______ Charlotte--....... Winston-Salem.. Albuquerque..... Akron... ............. Canton- Cincinnati------Cleveland------Columbus-- Dayton________ Lakewood--......... Springfield.......... Toledo..... ........... 80 70 76 50 68 70 68 76 77 70 84 77 56 53 64 82 55 . 80 77 82 84 84 85 70 87 87 61 76 63 74 78 79 68 75 56 74 75 72 70 60 74 69 70 74 85 82 65 76 50 84 74 82 60 82 72 83 These averages taken from various city water main locations, with some actual values slightly higher and some lower than values shown. 508 Chapter 25. Spray Equipment for Humidification & Dehumidification Table 1. Average Maximum Water Main Temperature3 (Continued) Statb ClTT Temp. F State ClTT Temp. F Okla......... Tulsa--..................... Portland.................. Pa.............. Erie.......................... McKeesport............ Philadelphia' ........ R. I--..... S. C........... Spartanburg............ S. Dak...... Tenn......... Chattanooga........... Knoxville................. Nashville.... ........... Texas........ AustinTM................... Beaumont................ San Antonio............ Wichita Falls.......... 82 85 60 64 74 75 74 82 83 67 68 80 81 78 55 84 89 70 90 65 90 86 86 84 90 84 83 76 85 Salt Lake City____ V* Lynchburg..... ......... Wash......... W. Va....... Wis............ 44 . 60 75 73 80 58 62 51 57 85 78 78 54 58 70 68 Province Alta........... B. C.......... P E. 1 Que.......... Montreal..... ............ Quebec..................... 64 60 50 63 48 78 68 aThese averages taken from various city water main locations, with some actual values slightly higher and some lower than values shown. may be taken upstream or at a considerable distance from the discharge, to prevent mixing of the heated discharged water with the inlet water. If the source of cooling water is a city supply or a well, the discharge water may be-run into the nearest sewer or open waterway. Lacking an unlimited water supply, or in cases where city water is too expensive or where the water available contains dissolved salts which would form scale on the heat-exchanging apparatus, it is necessary to recirculate the water, and to cool it after each passage through the heat-exchanger by exposure to air in an atmospheric water cooling apparatus. Air has a capacity for absorbing heat from water when the wet-bulb temperature of the air is lower than the temperature of the water with which it is in contact. The rapidity with which this transfer of heat occurs depends upon (1) the area of water in contact with the air, (2) the relative velocity of the air and water,'and (3) the difference between the wet-bulb temperature of the air and the temperature of the water. Because the changes in rate do not occur in direct proportion to changes in the govern ing factors, data on the performance of atmospheric water cooling equip ment are largely empirical. As the heat content of the air increases, its wet-bulb temperature rises. (See Chapter 1.) Because it is impractical to leave the air in contact 509