Transcription of VARIOUS FORMULAS FOR WATER HEATING CALCULATIONS
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VARIOUS FORMULAS FOR WATER HEATING CALCULATIONS
TECHNICAL DATA.. VARIOUS FORMULAS FOR WATER HEATING CALCULATIONS . % Efficiency = GPH X X Temp. Rise X Btu/Hr. Input Specific Heat Btu/Output = GPH X X Temp. Rise X Btu/Input = GPH X X Temp. Rise X % Efficiency Gal/Per/Hr. = Btu/Hr. Input X % Efficiency Temp. Rise X Rise ( F) = Btu/Hr. Input X % Efficiency GPH X KW = GPH X X Temp. Rise X (OR) GPH X Temp. Rise 3413 414. Gal/Per/Hr. = KW X 3413 (OR) KW X 414. Temp. Rise X Temp. Rise Rise ( F) = KW X 3413 (OR) KW X 414. GPH x GPH. 1 KW = 3413 Btu = Gals. @ 100 F Rise 1 KW = 1,000 Watts Btu X = Watts Determine % of hot WATER portion of total mixed WATER requirements M-C = 140-40 = 100 = of mixture H-C 180-40 140 is hot WATER % of cold WATER in mixture is: 1 3 (Balanced Circuits). Watts = Amps .577 X Watts = Amps H-M = 180-140 = 40 = of mixture Volts Volts H-C 180- 40 140 is cold WATER .
5. ASHRAE Guide and Data Book, copyright 1964 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. Chapter 82 “Water Services.” Page 919..... Proper F low and Pressure Required for Fixtures Page 920.....
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