EDMMT712101
Appendix
VAM-HVE/HVLT Series
179
<View of graph>
(Conditions) The ventilator used is a duct type ventilator
• Necessary airflow rate: 300 m
3
/h
• Duct diameter:
15 cm
• Duct length: 5 m
1 Find the intersection (A) for duct diameter d (15 cm) and airflow rate Q (300 m
3
/h) that flows through the duct.
2 Find intersection (B) by dropping a vertical line from intersection (A).
3 Take the scale unit of intersection (B) (2.2 Pa/m in this case) and multiply it by duct length to get 11 Pa.
Calculation to Circular Duct from Rectangular Duct
2.2
0
300
Airflow rate Q (m
3
/h)
Air velocity v (m/s)
d = 15 (cm)
Friction loss coefficient (Pa/m)
(B)
(A)
Long side
Short side
Equivalent
diameter
200
De
90
Long side
Short side
Example) For a rectangular duct of 40 × 200, the corresponding diameter
of a circular duct is 90.
I) Find the intersection (A) for the short side of 40 and the long side of 200.
II) Next find the line (B) that passes through intersection (A), and find
intersection (D) with the diagonal line (C).
In this case, the value of (D) becomes 90 by the corresponding
diameter.
40
(A)
(C)
(B)
(D)
Summary of Contents for VAM Series
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Page 4: ...EDMMT712101 2 Table of Contents 17 6 Precautions for Design and Installation 181 ...
Page 56: ...Control System EDMMT712101 54 VAM HVE HVLT Series C 3P343420 1E ...
Page 138: ...Installation Manual EDMMT712101 136 VAM HVE HVLT Series 3P607378 3C ...
Page 139: ...EDMMT712101 Installation Manual VAM HVE HVLT Series 137 3P607378 3C ...
Page 141: ...EDMMT712101 Installation Manual VAM HVE HVLT Series 139 C EM20A032 ...
Page 142: ...Installation Manual EDMMT712101 140 VAM HVE HVLT Series C EM20A032 ...
Page 143: ...EDMMT712101 Installation Manual VAM HVE HVLT Series 141 C EM20A032 ...
Page 147: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 145 3P607378 3C ...
Page 148: ...Details of Optional Accessories EDMMT712101 146 VAM HVE HVLT Series 3P607378 3C ...
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Page 150: ...Details of Optional Accessories EDMMT712101 148 VAM HVE HVLT Series 3P607378 3C ...
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Page 152: ...Details of Optional Accessories EDMMT712101 150 VAM HVE HVLT Series 3P607378 3C ...
Page 155: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 153 4P457318 1D ...
Page 156: ...Details of Optional Accessories EDMMT712101 154 VAM HVE HVLT Series 4P457318 1D ...
Page 157: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 155 4P457318 1D ...
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