Download the Mcquay pipe sizer with the solved example

Mcquay pipe sizer is used for Sizing the Pipe in HVAC Industry

To Download the Mcquay Pipe Sizer Click on Below Link

Download –Mcquay Pipe Sizer

Solved Example

Chilled Water Pipe Designing or Sizing:

Requirement: (Parameters)

• Flow Rate in GPM ( lit/Sec or m³/sec)
• 1 US Gallon = 3.78 lit
• 1 TR = 2.4 gpm ( if ∆T = 10⁰F , CHWR-CHWS= 10⁰F)
• Flow Rate = (TR x 24) / ∆T gpm
• From load calculation HAP report
• Chilled water piping layout
• Velocity in FPS
• Friction (ft/100’ or pipe length)

Using Pipe Sizer Software

Previous Example

Steps to use Pipe Sizer

1. Select the material and schedule
2. Standard chilled water Temperature = 50⁰F Water
3. Select any Diameter and check the velocity
4. In order to get the required velocity decrease or increase diameter

Pipe Sizing A-B (Roof Piping)

Q = 1440 GPM

Vmax = 10FPS

Software Result

Vactual = 9.24 FPS

Pipe Diameter =8’’

Head loss hf = 3.158 ft/100ft

Pipe Sizing B-C (Riser Piping)

Q = 840 GPM

Vmax = 10FPS

Software Result

Vactual = 9.33 FPS

Pipe Diameter =6’’

Head loss hf = 4.49 ft/100ft

Pipe Sizing C-D (Riser Piping)

Q = 360 GPM

Vmax = 10FPS

Software Result

Vactual = 9.07 FPS

Pipe Diameter =4’’

Head loss hf = 7.019 ft/100ft

Pipe Sizing B-B1 AHU-3 (Floor Piping)

Q = 600 GPM

Vmax = 7 FPS

Software Result

Vactual = 6.66 FPS

Pipe Diameter =6’’

Head loss hf = 2.368 ft/100ft

Pipe Sizing C-C1 AHU-2 (Floor Piping)

Q = 480 GPM

Vmax = 7 FPS

Software Result

Vactual = 5.33 FPS

Pipe Diameter =6’’

Head loss hf = 1.555 ft/100ft

Pipe Sizing D-E AHU-1 (Floor Piping)

Q = 360 GPM

Vmax = 7 FPS

Software Result

Vactual = 5.77 FPS

Pipe Diameter =5’’

Head loss hf = 2.261 ft/100ft

For Return Line is Also the same as the supply Line

For More HVAC Software

1. All HVAC Calculation Excel Sheet
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