Balancing of a Water and Air System (PDF

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114 Example 14: Fine the tons of a condenser that has a 8” SCH 40 with a pressure of 23.347psig and a total pressure of 23.352 psig and a entering water of 85º and leaving water of 93º. Solution • Total pressure – Pressure = VP • FPM = 1040 X √ VP • GPM = FPM X Gallons per foot • Ton = GPM X 60 X 8.337 X ∆ Temperature of the water • 23.352 psig – 23.347 = 0.005 VP • 1040 X √ 0.005 = 73.54 FPM • 73.54 X 2.6 gallons per foot = 191.20 GPM • 191.20 X 60 X 8.337 X 8 = 765,136.5 btuh • 765,136.5 / 15,000 = 51.01 tons 114
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Balancing of a water and air system
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3 8 TBA (Testing, Balancing and Adj
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5 Air Balancing Multiple Hood syste
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7 87 Series Loop 88 One pipe main 9
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9 Testing and Balancing HVAC A syst
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11 13. Filter frame properly instal
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13 13. Measure and record all requi
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15 15 Example 3: Find the nearest s
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17 For traverses taken in round duc
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19 Flat Oval Duct Traverses For fie
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21 Balancing Devices Volume Dampers
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23 Turning Vanes Turning vanes (Fig
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25 Balancing the VAV System The gen
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27 maximum out-side air damper for
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29 determines how much energy is in
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31 the water removing capacity of a
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33 Table 8A Dry Bulb on left, Wet B
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35 60 58 56 54 52 50 48 46 44 42 40
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37 Foot³ per 1lb Altitude 0 Feet A
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39 Table 9 C Air Density at 29.29
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41 41 Wet-Bulb (F) .0 .1 .2 .3 .4 .
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43 Table 11A Enthalpy at saturation
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45 Table 11 C Enthalpy at saturatio
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47 Wet bulb temperature____________
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49 and replacement should be shut o
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51 duct may be great; the balancing
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53 Design below the 250°F limit (A
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55 Differential Pressure Gauges The
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57 Venturi The venturi is a device
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59 Pressure Total pressure Velocity
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61 Table 1 shows that if the coil i
Page 63 and 64: 63 adjustment of these devices is n
Page 65 and 66: 65 Grouting Motor and lubrication N
Page 67 and 68: 67 For every outside temperature ot
Page 69 and 70: 69 4. Identify the riser with the h
Page 71 and 72: 71 2. Turn the pump off 3. Close th
Page 73 and 74: 73 Net positive suction head availa
Page 75 and 76: 75 All automatic control valves mus
Page 77 and 78: 77 77
Page 79 and 80: 79 4. Read and record the actual pu
Page 81 and 82: 81 13. Record the coils design and
Page 83 and 84: 83 Air Control Air is always presen
Page 85 and 86: 85 • allow draining of all or par
Page 87 and 88: 87 Valves have linear throttling ch
Page 89 and 90: 89 to all the terminals down the li
Page 91 and 92: 91 Pump Circuits Primary-Secondary
Page 93 and 94: 93 • Evaporator: • the design a
Page 95 and 96: 95 95
Page 97 and 98: 97 Condenser • the design and act
Page 99 and 100: 99 • Each reading of liquid tempe
Page 101 and 102: 101 • Design and actual entering
Page 103 and 104: 103 differs from the average by mor
Page 105 and 106: 105 • Orifice plate • Turbine m
Page 107 and 108: 107 BTUH = GPM X 60 X 8.337 X ∆T
Page 109 and 110: 109 Lam = lbs. of air per minute th
Page 111 and 112: 111 When dry bulb temperature measu
Page 113: 113 GPM = FPM X Gallons per foot FP
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