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Unit & Piping Selection

Unit & Piping Selection. E. A. B. F. C. D. Unit & Piping Selection. Example. Building Type: Apartment. Unit & Piping Selection. Example. Requirement Cooling only model Ambient temperature : 35.0 °C Indoor temperature : 22.0 °C. Other Information Piping length ： 40m

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Unit & Piping Selection

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  1. Unit & Piping Selection

  2. E A B F C D Unit & Piping Selection Example Building Type: Apartment

  3. Unit & Piping Selection Example • Requirement • Cooling only model • Ambient temperature : 35.0 °C • Indoor temperature : 22.0 °C • Other Information • Piping length：40m • Height between I/O：10m • Outdoor Unit located below indoors

  4. Unit & Piping Selection Example • Total Indoor capacity is 9.5 hp

  5. Unit & Piping Selection Example Selection Criteria • Indoor cap. should be 50% ~ 120% of the outdoor cap. • When all the indoor units run at the same time, the indoor unit should not be larger than the outdoor • We recommend that the outdoor cap. equals to the indoor cap or a little larger than the indoor unit Selected Outdoor : MDS100B Nominal Cooling Capacity : 28.0kW Comply to selection criteria

  6. Unit & Piping Selection Example • Selected Outdoor and Indoor Model

  7. Unit & Piping Selection Example Other factors to consider: • Outdoor capacity factor • Influence by the design ambient temperature and indoor temperature • Piping length & height factor • Influence by the location of outdoor and the total piping length

  8. Unit & Piping Selection Cooling cap. factor

  9. Wet bulb of the ambient temp °C Heating cap. factor Dry bulb of the indoor temp °C Unit & Piping Selection

  10. Unit & Piping Selection Cooling cap. factor

  11. Unit & Piping Selection Heating cap. factor

  12. Unit & Piping Selection Example Outdoor Capacity factor • Cooling only model • Ambient temperature : 35.0 °C • Indoor temperature : 22.0 °C 1.08

  13. Unit & Piping Selection Example • Piping length & height factor • Piping length：40m • Height between I/O：10m • Outdoor Unit located below indoors 96%

  14. Unit & Piping Selection Example Total Capacity = Outdoor Capacity X Outdoor Capacity Factor X Piping length & height Factor = 28.0 kW X 1.08 X 96% = 29.0 kW

  15. Unit & Piping Selection Example Actual indoor cap =Outdoor Capacity X Nominal indoor Capacity / Total Indoor Capacity X Piping Length & Height Factor WM10G = 29.0 kW X 10/95 X 0.96 = 2.93 kW WM20G = 29.0 kW X 20/95 X 0.96 = 5.86 kW CK20A = 29.0 kW X 20/95 X 0.96 = 5.86 kW CC25C = 29.0 kW X 25/95 X 0.96 = 7.32 kW Base on the requirement, the selected model is sufficient.

  16. Unit & Piping Selection Connection Type of Branch Joint/Branch Header

  17. Unit & Piping Selection Connection Type of Branch Joint/Branch Header

  18. Unit & Piping Selection Connection Type of Branch Joint/Branch Header

  19. Unit & Piping Selection Connection Type of Branch Joint/Branch Header Mistake

  20. Model Branch joint (2 branch) MDS-Y1 MDS-Y2 MDS-Y3 MDS-Y4 MDS-Y5 Branch header (4 branch) MDS-C1 MDS-C2 MDS-C3 Unit & Piping Selection Selection of branch joint / header for MDS

  21. Unit & Piping Selection MDS-Y1~Y4 dimensional drawing

  22. Unit & Piping Selection MDS-Y5 dimensional drawing

  23. Unit & Piping Selection MDS-C1 dimensional drawing

  24. Unit & Piping Selection MDS-C2~C3 dimensional drawing

  25. Unit & Piping Selection Refrigerant Copper Pipe Specification : MDS-A Specification

  26. Specification Unit & Piping Selection Refrigerant Copper Pipe Specification : MDS-B

  27. Unit & Piping Selection Example • Selection pipe diameter MDS100B C A B WM10G WM10G CC25C 2.93kW 2.93kW 7.32kW D E WM10G CK20A WM20G 2.93kW 5.86kW 5.86kW

  28. Unit & Piping Selection Example Calculate the downstream capacity Point A A-B-C : 13.20kW A-D-E : 14.70kW Point B B-C : 5.86kW D-E : 8.79kW Main pipe diameter : ø 12.7mm / ø 28.6mm MDS100B C A B WM10G WM10G CC25C 2.93kW 2.93kW 7.32kW D E WM10G CK20A WM20G 2.93kW 5.86kW 5.86kW

  29. Specification Unit & Piping Selection Example

  30. Unit & Piping Selection Example B-C diameter : ø 9.52mm / ø15.88mm A-B diameter : ø 9.52mm / ø 19.05mm MDS100B C A B WM10G WM10G CC25C D E WM10G CK20A WM20G A-D diameter : ø 9.52mm / ø 19.05mm D-E diameter : ø 9.52mm / ø15.88mm

  31. Unit & Piping Selection Example Main pipe diameter : ø 12.7mm / ø 28.6mm A-B diameter : ø 9.52mm / ø 19.05mm B-C diameter : ø 9.52mm / ø15.88mm MDS100B C A B WM10G WM10G CC25C D E WM10G CK20A WM20G A-D diameter : ø 9.52mm / ø 19.05mm D-E diameter : ø 9.52mm / ø15.88mm

  32. Unit & Piping Selection Example • Selection of branch • Select the branch of point A • A (liquid) : MDS-Y2 • A (gas) : MDS-Y1 • Select the branch of other points • B (liquid) : MDS-Y3 C (liquid) : MDS-Y2 • B (gas) : MDS-Y4 C (gas) : MDS-Y2 • D (liquid) : MDS-Y2 E (liquid) : MDS-Y2 • D (gas) : MDS-Y4 E (gas) : MDS-Y4

  33. Unit & Piping Selection Example Using liquid tube length to calculate required refrigerant → Add in refrigerant Formula: G = ∑ Li* Gi G : Refrigerant charge amount Li : The each section of liquid tube length in all (m) Gi : Charge amount per length（g/m）

  34. Unit & Piping Selection Example 1m (12.70mm) 5m (9.52mm) 5m (9.52mm) 2m (6.35mm) MDS100B C A B WM10G WM10G CC25C 1m (9.52mm) 1m (6.35mm) 2m (6.35mm) 15m (9.52mm) D E WM10G CK20A WM20G 5m (6.35mm) 3m (9.52mm) 1m (6.35mm)

  35. Unit & Piping Selection Example Additional charge amount G : Formula: G = ∑ Li* Gi = (120 x 1) + (80 x 29) + (50 x 11) = 2990 g

  36. Unit & Piping Selection MDS unit selection software McQuay MDS unit selection software

  37. Unit & Piping Selection MDS control & monitoring software

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