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    Dave Martin's Avatar
    Dave Martin Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 27, 2008, 11:14 AM
    Tonnage of A/c UNit
    I have a day & Night model 565AB060 air conditioning unit. I need to the size (tonnage) of the unit.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 27, 2008, 11:20 AM
    Should be 5 ton that is 60,000 BTU
    kuldip singh's Avatar
    kuldip singh Posts: 3, Reputation: 1
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    #3

    Mar 27, 2008, 09:59 PM
    How the cooling tower tonnage is related to chillers tonnage?
    SHAPRE's Avatar
    SHAPRE Posts: 2, Reputation: 1
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    #4

    May 22, 2008, 12:15 AM
    cooling tower is nothing but a air washer,,

    rule of thumb ==tr of chiller+0.25xtr

    by equation.
    parameters are.

    entering water temp.-
    leaving water temp
    wet bulb temp of ambient air.

    approach=5-10 °F
    Evaporation losses are about 1% by mass of the circulation rate for every 10 °F (5.5 °C) of cooling. Drift losses are around 0.25% of the circulation rate. A blowdown of about 3% of the circulation rate is needed to prevent salt and chemical treatment buildup

    . Water circulation rates are generally 2-4 GPM/sq. ft (81-162 L/min m2) and air velocities are usually 5-7 ft/s (1.5-2.0 m/s)

    heat rejection rate=15000btu/hr per tonn
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