esp of exhaust fan

EXTERNAL STATIC PRESSURE CALCULATIONPROTOTYPE ROOF MOUNTED EXHAUST FAN

Description H nhv1 nhv2 n(hv2-hv1) Remarks

1 500 300 0.15 772 5.15 1013 10.00 Refer Note 6

2 500 300 0.15 772 5.15 1013 50.00 Refer Note 7

500 300 0.15 772 0.15 5.15 1013 0.408 0.06 Refer Note 3

3 Reducer 625 300 0.1875 772 4.12 810 0.041 0.0418 0.0234975 5.87 Refer Note 4

500 300 0.15 772 5.15 1013 0.064 0.0653

625 300 0.1875 772 0.1 4.12 810 0.408 0.04 Refer Note 3

4 625 300 0.1875 772 4.12 810 12.5 Refer Note 8

5 625 300 0.1875 772 0.428 4.12 810 0.408 0.17 Refer Note 3

6 Fire Damper 625 300 0.1875 772 4.12 810 2.00 Refer Note 5

7 625 300 0.1875 772 0.339 4.12 810 0.408 0.14 Refer Note 3

8 Bend, 90° 625 300 0.1875 772 3.05 4.12 810 0.408 1.24 Refer Note 3

9 625 300 0.1875 772 0.85 4.12 810 0.408 0.35 Refer Note 3

S.No.

W Area

a=H×W (m²)

Air Flow Q

(L/s)

Equivalent Length(m)

Velocity =Q/a (m/s)

Velocity V=Q/a (FPM)

hv= (V/4005)²

Pressure Drop(Pa/

m)

Total Pressure Drop(Pa)

Bird Wire Mesh

Non-return damper

Straight Duct

Straight Duct

Volume Control Damper

Straight Duct

Straight Duct

Straight Duct


Description H nhv1 nhv2 n(hv2-hv1) RemarksS.No

. W

Area a=H×W

(m²)

Air Flow Q

(L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²

Pressure Drop(Pa/

m)


10 Bend, 90° 625 300 0.1875 772 3.05 4.12 810 0.408 1.24 Refer Note 3

11 625 300 0.1875 637 2.57 3.40 669 0.408 1.05 Refer Note 3

12 Bend, 90° 625 300 0.1875 637 3.05 3.40 669 0.408 1.24 Refer Note 3

13 625 300 0.1875 637 0.60 3.40 669 0.408 0.24 Refer Note 3

14 Expansion 625 300 0.1875 637 3.40 669 0.028 0.0259 0.0047059 1.18 Refer Note 4

575 300 0.1725 637 3.69 727 0.033 0.0306

15 575 300 0.1725 637 4.01 3.69 727 0.408 1.64 Refer Note 3

16 Bend, 45° 575 300 0.1725 637 1.37 3.69 727 0.408 0.56 Refer Note 3

17 575 300 0.1725 637 1.96 3.69 727 0.408 0.80 Refer Note 3

18 Bend, 45° 575 300 0.1725 637 1.37 3.69 727 0.408 0.56 Refer Note 3

19 575 300 0.1725 352 0.98 2.04 402 0.408 0.40 Refer Note 3


Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct



. W

Area a=H×W

(m²)

Air Flow Q

(L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²

Pressure Drop(Pa/

m)


425 300 0.1275 352 2.76 543 0.018 0.0171

21 425 300 0.1275 352 3.34 2.76 543 0.408 1.36 Refer Note 3

22 Bend, 13° 425 300 0.1275 352 0.40 2.76 543 0.408 0.16 Refer Note 3

23 425 300 0.1275 303 6.65 2.38 468 0.408 2.71 Refer Note 3


300 350 0.105 303 2.89 568 0.020 0.0187

25 300 350 0.105 303 2.24 2.89 568 0.408 0.91 Refer Note 3

26 Bend, 90° 300 350 0.105 303 2.13 2.89 568 0.408 0.87 Refer Note 3

27 300 350 0.105 303 9.54 2.89 568 0.408 3.89 Refer Note 3

28 Bend, 7° 300 350 0.105 303 0.1656667 2.89 568 0.408 0.07 Refer Note 3

29 300 350 0.105 251 5.18 2.39 471 0.408 2.11 Refer Note 3


Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct



. W

Area a=H×W

(m²)

Air Flow Q

(L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²

Pressure Drop(Pa/

m)


300 275 0.0825 251 3.04 599 0.022 0.0208

31 300 275 0.0825 151 4.56 1.83 360 0.408 1.86 Refer Note 3

32 Bend, 75° 300 275 0.0825 151 1.775 1.83 360 0.408 0.72 Refer Note 3

33 300 275 0.0825 151 5.55 1.83 360 0.408 2.26 Refer Note 3

34 Bend, 19° 300 275 0.0825 151 0.4496667 1.83 360 0.408 0.18 Refer Note 3

35 300 275 0.0825 104 2.16 1.26 248 0.408 0.88 Refer Note 3


300 200 0.06 104 1.73 341 0.007 0.0068

37 300 200 0.06 104 1.32 1.73 341 0.408 0.54 Refer Note 3

38 Bend, 10° 300 200 0.06 104 0.1688889 1.73 341 0.408 0.07 Refer Note 3

39 300 200 0.06 104 2.36 1.73 341 0.408 0.96 Refer Note 3

40 300 100 0.03 31 0.68 1.03 203 0.408 0.28 Refer Note 3

Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct



. W

Area a=H×W

(m²)

Air Flow Q

(L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²

Pressure Drop(Pa/

m)


41 300 300 0.09 31 0.34 68 5.25 Refer Note 2

42 Door Grille 175 100 0.0175 28 1.60 315 31.75 Refer Note 1

154.38

Add 10% safety factor 7.72Total External Static Pressure 162.10

Say 162

Notes:

1 Refer attached EH Price Catalogue of Door Grille2 Refer attached EH Price Catalogue of Exhaust Air Diffuser3 Duct Designed at 0.408 Pa/m4 Refer Carrier Hand Book Table attached5 Refer ATAI Catalogue of fire damper attached6 Assumed value7 Refer Non-return damper Catalogue8 Refer ATAI Catalogue of volume control damper attached

Exhaust Diffuser

Sub Total=



. W

Area a=H×W

(m²)

Air Flow Q

(L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²

Pressure Drop(Pa/

m)


of 72

EXTERNAL STATIC PRESSURE CALCULATIONPROTOTYPE BUILDING ROOF MOUNTED PACKAGE UNIT

S.No. Description H nhv1 nhv2 n(hv2-hv1) Remarks

1 600 600 0.36 280 0.78 153 20.00 Refer Note 1

2 300 300 0.09 280 1.00 3.11 612 0.39 0.39 Refer Note 2

3 350 375 0.13125 560 2.42 4.27 840 0.39 0.94 Refer Note 2

4 Bend, 90° 350 375 0.13125 560 2.44 4.27 840 0.39 0.95 Refer Note 3

5 350 375 0.13125 560 1.10 4.27 840 0.39 0.43 Refer Note 2

6 Bend, 90° 350 375 0.13125 560 2.44 4.27 840 0.39 0.95 Refer Note 3

7 350 375 0.13125 560 4.53 4.27 840 0.39 1.77 Refer Note 2

8 Bend, 12° 350 375 0.13125 560 0.33 4.27 840 0.39 0.13 Refer Note 3

9 350 375 0.13125 560 2.20 4.27 840 0.39 0.86 Refer Note 2

10 Bend, 25° 350 375 0.13125 560 0.68 4.27 840 0.39 0.26 Refer Note 3

11 350 375 0.13125 560 0.18 4.27 840 0.39 0.07 Refer Note 2

W

Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²

Pressure Drop (Pa/m)


Laminar flow diffuser(SD)

Flexible Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct

of 72


S.No. Description H nhv1 nhv2 n(hv2-hv1) Remarks W

Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²




450 450 0.2025 560 2.77 544 0.018 0.019

13 450 450 0.2025 918 2.18 4.53 892 0.39 0.85 Refer Note 2


450 575 0.25875 918 3.55 698 0.030 0.031

15 450 575 0.25875 1277 3.11 4.94 972 0.39 1.21 Refer Note 2

16 Bend, 75° 450 575 0.25875 1277 2.79 4.94 972 0.39 1.09 Refer Note 3

17 450 575 0.25875 1376 3.38 5.32 1047 0.39 1.32 Refer Note 2


500 575 0.2875 1376 4.79 942 0.055 0.056

19 500 575 0.2875 1476 2.71 5.13 1011 0.39 1.06 Refer Note 2


Straight Duct

Straight Duct

Straight Duct

Straight Duct

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



600 575 0.345 1476 4.28 842 0.044 0.045

21 600 575 0.345 1869 2.21 5.42 1066 0.39 0.86 Refer Note 2


600 700 0.42 1869 4.45 876 0.048 0.049

23 600 700 0.42 2065 0.59 4.92 968 0.39 0.23 Refer Note 2

24 Bend, 7° 600 700 0.42 2065 0.40 4.92 968 0.39 0.16 Refer Note 3

25 600 700 0.42 2541 3.11 6.05 1191 0.39 1.21 Refer Note 2


650 700 0.455 2541 5.58 1099 0.075 0.077

27 650 700 0.455 2821 6.05 6.20 1220 0.39 2.36 Refer Note 2

28 Bend, 90° 650 700 0.455 2821 4.27 6.20 1220 0.39 1.67 Refer Note 3

29 650 700 0.455 2821 3.94 6.20 1220 0.39 1.54 Refer Note 2

Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²




700 700 0.49 2821 5.76 1133 0.080 0.082

31 700 700 0.49 2921 2.83 5.96 1173 0.39 1.10 Refer Note 2

32 700 700 0.49 2921 1.00 5.96 1173 0.39 0.39 Refer Note 2

33 700 700 0.49 2921 0.30 5.96 1173 0.39 0.12 Refer Note 2

34 Bend, 12° 700 700 0.49 2921 0.57 5.96 1173 0.39 0.22 Refer Note 3

35 700 700 0.49 2921 2.15 5.96 1173 0.39 0.84 Refer Note 2


1200 600 0.72 2921 4.06 799 0.040 0.041

37 1200 600 0.72 4657 1.99 6.47 1273 0.39 0.78 Refer Note 2

38 Reducer 1200 600 0.72 4657 6.47 1273.24 0.10 0.10 0.02 5.53 Refer Note 3

1300 625 0.8125 4657 5.73 1128.29 0.08 0.08

39 Bend, 35° 1300 625 0.8125 4657 2.73 5.73 1128.29 0.39 1.06 Refer Note 3

40 1300 625 0.8125 5281 4.54 6.50 1279.47 0.39 1.77 Refer Note 2

Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct

Straight Duct

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



41 Bend, 43° 1300 625 0.8125 5281 3.35 6.50 1279.47 0.39 1.31 Refer Note 3


1000 675 0.675 5281 7.82 1540.10 0.15 0.15

43 1000 675 0.675 5281 0.15 7.82 1540.10 0.39 0.06 Refer Note 2

44 1000 675 0.675 5281 0.15 7.82 1540.10 22.50 Refer Note 4

45 1000 675 0.675 5281 0.15 7.82 1540 0.39 0.06 Refer Note 2

46 1000 675 0.675 5281 0.50 7.82 1540 0.39 0.20 Refer Note 2

47 Bend, 90° 1000 675 0.675 5281 6.40 7.82 1540.10 0.39 2.50 Refer Note 3

48 Bend, 90° 1600 675 1.08 7500 7.62 6.94 1367.02 0.39 2.97 Refer Note 3

49 1600 675 1.08 7500 0.17 6.94 1367 0.39 0.07 Refer Note 2

50 Fire Damper 1600 675 1.08 7500 0.17 6.94 1367 4.50 Refer Note 5

51 1600 675 1.08 7500 2.09 6.94 1367 0.39 0.81 Refer Note 2


550 2025 1.11375 7500 6.73 1325.59 0.11 0.11

Straight Duct


Straight Duct

Straight Duct

Straight Duct

Straight Duct

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



53 550 2025 1.11375 7500 0.30 6.73 1326 0.39 0.12 Refer Note 2

54 Plenum 5000 900 4.5 7500 1.80 1.67 328 0.39 10.00

55 1100 550 0.605 3750 0.10 6.20 1220 0.39 0.04 Refer Note 2

56 1100 550 0.605 3750 0.10 6.20 1220 50.00 Refer Note 8

57 1100 550 0.605 3750 0.21 6.20 1220 0.39 0.08 Refer Note 2

58 Bend, 20° 1100 550 0.605 3750 1.42 6.20 1220.15 0.39 0.55 Refer Note 3

59 1100 550 0.605 3750 0.47 6.20 1220 0.39 0.18 Refer Note 2

60 Bend, 17° 1100 550 0.605 3750 1.21 6.20 1220.15 0.39 0.47 Refer Note 3

61 1100 550 0.605 3750 1.03 6.20 1220 0.39 0.40 Refer Note 2

62 1100 550 0.605 3750 1.20 6.20 1220 75.00 Refer Note 6

63 1100 550 0.605 3750 0.23 6.20 1220 0.39 0.09 Refer Note 2


900 800 0.72 3750 5.21 1025.26 0.07 0.07

65 900 800 0.72 3750 0.24 5.21 1025 0.39 0.09 Refer Note 2

Straight Duct

Straight Duct

Non-return damper

Straight Duct

Straight Duct

Straight Duct

Sound Attenuator (SD)

Straight Duct

Straight Duct

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



66 900 800 0.72 3364 0.24 4.67 920 0.39 0.09 Refer Note 2


1100 550 0.605 3364 5.56 1094.55 0.07 0.08

68 1100 550 0.605 3364 0.15 5.56 1095 0.39 0.06 Refer Note 2

69 1100 550 0.605 3364 1.20 5.56 1095 67.50 Refer Note 6

70 1100 550 0.605 3364 0.15 5.56 1095 0.39 0.06 Refer Note 2

71 Bend, 49° 1100 550 0.605 3364 3.48 5.56 1094.55 0.39 1.36 Refer Note 3

72 1100 550 0.605 3364 0.62 5.56 1095 0.39 0.24 Refer Note 2

73 Bend, 49° 1100 550 0.605 3364 3.48 5.56 1094.55 0.39 1.36 Refer Note 3

74 1100 550 0.605 3364 0.19 5.56 1095 0.39 0.07 Refer Note 2

75 1100 550 0.605 3364 0.10 5.56 1095 50.00 Refer Note 8

76 1100 550 0.605 3364 0.20 5.56 1095 0.39 0.08 Refer Note 2

77 Plenum 5000 900 4.5 6728 1.80 1.50 294 0.39 10.00

Straight Duct(RD)

Straight Duct(RD)

Sound Attenuator (RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Non-return damper

Straight Duct(RD)

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



78 1850 550 1.0175 6728 0.30 6.61 1302 0.39 0.12 Refer Note 2

79 625 1550 0.96875 6728 6.95 1367.13 0.12 0.11 0.010 2.53 Refer Note 4

1850 550 1.0175 6728 6.61 1301.63 0.11 0.10

80 625 1550 0.96875 6728 0.15 6.95 1367.13 0.39 0.06 Refer Note 2

81 Bend, 39° 625 1550 0.96875 6728 3.30 6.95 1367.13 0.39 1.29 Refer Note 3

82 625 1550 0.96875 6728 0.69 6.95 1367.13 0.39 0.27 Refer Note 2

83 Bend, 39° 625 1550 0.96875 6728 3.30 6.95 1367.13 0.39 1.29 Refer Note 3

84 625 1550 0.96875 6728 0.17 6.95 1367.13 0.39 0.07 Refer Note 2

85 Fire Damper 625 1550 0.96875 6728 6.95 1367 2.50

86 625 1550 0.96875 6728 0.21 6.95 1367.13 0.39 0.08 Refer Note 2

87 Bend, 90° 625 1550 0.96875 6728 7.62 6.95 1367.13 0.39 2.97 Refer Note 3

88 625 1550 0.96875 6093 0.40 6.29 1238.10 0.39 0.16 Refer Note 2

89 1225 625 0.76563 6093 0.50 7.96 1566.58 0.39 0.20 Refer Note 2

90 Bend, 90° 625 1225 0.76563 6093 7.01 7.96 1566.58 0.39 2.73 Refer Note 3

91 1225 625 0.76563 6093 0.45 7.96 1566.58 0.39 0.18 Refer Note 2

92 1225 625 0.76563 6093 0.10 7.96 1566.58 0.39 0.04 Refer Note 2

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



93 1225 625 0.76563 6093 7.96 1566.58 12.50 Refer Note 4

94 1225 625 0.76563 6093 0.51 7.96 1566.58 0.39 0.20 Refer Note 2


1400 625 0.875 6093 6.96 1370.75 0.12 0.12

96 1400 625 0.875 6093 1.65 6.96 1370.75 0.39 0.64 Refer Note 2

97 1200 625 0.75 4781 6.37 1254.86 0.10 0.09 0.024 6.06 Refer Note 4

1400 625 0.875 4781 5.46 1075.59 0.07 0.07

98 1200 625 0.75 4781 0.75 6.37 1254.86 0.39 0.29 Refer Note 2

99 Bend, 90° 1200 625 0.75 4513 7.01 6.02 1184.51 0.39 2.73 Refer Note 3

100 1200 625 0.75 4513 4.43 6.02 1184.51 0.39 1.73 Refer Note 2

101 950 625 0.59375 4057 6.83 1345.05 0.11 0.10 0.039 9.79 Refer Note 4

1200 625 0.75 4057 5.41 1064.83 0.07 0.07

102 950 625 0.59375 4057 2.93 6.83 1345.05 0.39 1.14 Refer Note 2

103 Bend, 12° 950 625 0.59375 3432 0.85 5.78 1137.84 0.39 0.33 Refer Note 3


Straight Duct(RD)

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



104 950 625 0.59375 3432 0.83 5.78 1137.84 0.39 0.32 Refer Note 2

105 650 625 0.40625 2186 5.38 1059.24 0.07 0.07 0.035 8.65 Refer Note 4

950 625 0.59375 2186 3.68 724.74 0.03 0.03

106 650 625 0.40625 2186 1.61 5.38 1059.24 0.39 0.63 Refer Note 2

107 Bend, 29° 650 625 0.40625 2186 1.67 5.38 1059.24 0.39 0.65 Refer Note 3

108 650 625 0.40625 2186 4.94 5.38 1059.24 0.39 1.93 Refer Note 2

109 Bend, 63° 650 625 0.40625 1418 3.63 3.49 687.10 0.39 1.41 Refer Note 3

110 650 625 0.40625 1418 0.20 3.49 687.10 0.39 0.08 Refer Note 2

111 400 625 0.25 1418 5.67 1116.54 0.08 0.07 0.045 11.23 Refer Note 4

650 625 0.40625 1418 3.49 687.10 0.03 0.03

112 400 625 0.25 686 1.39 2.74 540.16 0.39 0.54 Refer Note 2

113 400 425 0.17 686 4.04 794.35 0.04 0.04 0.020 4.92 Refer Note 4

400 625 0.25 686 2.74 540.16 0.02 0.02

114 400 425 0.17 686 2.98 4.04 794.35 0.39 1.16 Refer Note 2

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

Straight Duct(RD)

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



115 Bend, 9° 400 425 0.17 686 0.37 4.04 794.35 0.39 0.14 Refer Note 3

116 400 425 0.17 686 2.27 4.04 794.35 0.39 0.88 Refer Note 2

117 175 425 0.07438 175 2.35 463.18 0.01 0.01 0.010 2.51 Refer Note 4

400 425 0.17 175 1.03 202.64 0.00 0.00

118 175 425 0.07438 175 1.63 2.35 463.18 0.39 0.63 Refer Note 2

119 Bend, 29° 175 425 0.07438 175 0.69 2.35 463.18 0.39 0.27 Refer Note 3

220 175 425 0.07438 175 1.83 2.35 463.18 0.39 0.71 Refer Note 2

221 200 200 0.04 58 1.45 285.43 5.00 Refer Note 4

222 200 200 0.04 58 1.00 1.45 285.43 0.39 0.39 Refer Note 2

223 600 150 0.09 58 0.64 126.86 3.50 Refer Note 7

Total= 529.46

Safety 5% 52.95Grand Total= 582.41

Say 582Notes:1 Refer attached EH Price Catalogue of Laminar flow diffuser

Straight Duct(RD)

Expension (RD)

Straight Duct(RD)

Straight Duct(RD)


Flexible Duct

Curved Linear slot

diffuser (RD)

of 72



Area a=H×W

(m²)

Air Flow

Q (L/s)


Velocity =Q/a (m/s)


hv= (V/4005)²



2 Duct Designed at 0.408 Pa/m3 Refer Carrier Hand Book Table attached4 Refer ATAI Catalogue of volume control damper attached5 Refer ATAI Catalogue of fire damper attached6 Refer Catalogue of Sound Attenuator attached7 Refer Catalogue of Curved Linear slot diffuser attached8 Refer Catalogue of Non Return Damper attached9 SD- Supply Duct10 RD- Return Duct

S.No.

1450 450 450 0.159 0.490 3.08 607 0.023

0.032350 375 362 0.103 0.490 4.76 936 0.055

2500 575 536 0.226 1.020 4.52 890 0.049

0.012450 575 509 0.203 1.020 5.02 989 0.061

3600 575 587 0.271 1.120 4.14 814 0.041

0.019500 575 536 0.226 1.120 4.96 977 0.059

4650 700 675 0.357 1.904 5.33 1049 0.069

0.012600 700 648 0.330 1.904 5.77 1137 0.081

5700 700 700 0.385 2.107 5.48 1078 0.072

0.012650 700 675 0.357 2.107 5.90 1161 0.084

6650 600 624 0.306 2.207 7.21 1419 0.126

-0.047700 700 700 0.385 2.207 5.74 1129 0.080

71300 625 901 0.638 3.363 5.27 1038 0.067

0.0191200 600 849 0.565 3.363 5.95 1171 0.086

81000 675 822 0.530 3.910 7.38 1453 0.132

-0.0421300 625 901 0.638 3.910 6.13 1207 0.091

91600 675 1039 0.848 5.487 6.47 1274 0.101

-0.006550 2025 1055 0.874 5.487 6.28 1235 0.095

101200 550 812 0.518 2.744 5.30 1043 0.068

-0.011900 800 849 0.565 2.744 4.85 956 0.057

11550 1850 1009 0.799 2.956 3.70 729 0.033

0.034900 800 849 0.565 2.956 5.23 1030 0.066

12625 1550 984 0.760 5.911 7.77 1530 0.146

-0.014550 1850 1009 0.799 5.911 7.40 1457 0.132

131225 625 875 0.601 5.126 8.53 1679 0.176

-0.0421400 625 935 0.687 5.126 7.46 1469 0.135

141400 625 935 0.687 4.215 6.14 1208 0.091

0.0341200 625 866 0.589 4.215 7.16 1409 0.124

151200 625 866 0.589 3.119 5.30 1043 0.068

0.041950 625 771 0.466 3.119 6.69 1317 0.108

16950 625 771 0.466 1.969 4.22 832 0.043

0.050650 625 637 0.319 1.969 6.17 1215 0.092

17650 625 637 0.319 1.154 3.62 712 0.032

0.053400 625 500 0.196 1.154 5.88 1158 0.084

18400 425 412 0.133 0.201 1.51 296 0.005

0.024175 425 273 0.058 0.201 3.44 678 0.029

19450 450 450 0.159 1.020 6.42 1263 0.099

-0.039450 575 509 0.203 1.020 5.02 989 0.061

20600 700 648 0.330 1.408 4.27 841 0.044

0.022600 575 587 0.271 1.408 5.20 1023 0.065

21400 425 412 0.133 0.666 4.99 982 0.060

-0.033400 625 500 0.196 0.666 3.39 668 0.028

1200 550 812 0.518 2.744 5.30 732 0.033-0.006400 625 500 0.196 0.666 3.39 668 0.028

Friction Loss of Reducers of 60°, n=1.02 (page 43 CHB) For Prototype Building

Duct Width W

Duct Height

D

Equivalent Diameter of

Duct d=sqrt(W*D)

X- Area of Duct

m²

Flow m³/s

Velocity m/s

Velocity FPM

hv= (V/4005)²

S.P. Loss= n(hv2 - hv1) in wg

8.080.484288 0.668515 0.6821.152803

2.95

4.64

3.04

2.95

-11.73

4.68

-10.39

-1.54

-2.76

8.41

-3.48

-10.50

8.38

10.30

12.49

13.23

5.90

-9.83

5.42

-8.25

-1.42

, n=1.02 (page 43 CHB) For Prototype Building

S.P. Loss= n(hv2 -

hv1) Pa.

Summary of External Static Pressure of Package Rooftop Unit

External Static Pressure Calculation for supply air duct 174 Pascal

External Static Pressure Calculation for return air duct 166 Pascal

Total Design External Static Pressure 340 Pascal

Proposed Package Rooftop Unit External Static Pressure 350 Pascal

Additional Equivalent Length of Straight Duct Due to Radius Elbow With Vanes

S.No.

1 2400 1200 13.722 2400 900 10.973 2400 750 9.454 2400 600 10.065 2400 500 8.536 1800 1200 13.417 1800 900 10.068 1800 750 8.539 1800 600 8.84

10 1800 500 7.0111 1800 400 5.4912 1800 300 5.1813 1500 1200 12.5014 1500 900 9.4515 1500 750 7.6216 1500 600 8.2317 1500 500 6.7118 1500 400 4.8819 1500 300 4.5720 1200 1200 10.6721 1200 900 7.9222 1200 750 7.0123 1200 600 7.3224 1200 500 5.7925 1200 400 4.5726 1200 300 4.2727 1200 250 3.6628 1200 200 2.4429 1050 1050 8.5330 1050 900 7.3231 1050 750 6.4032 1050 600 6.4033 1050 500 5.4934 1050 400 4.2735 1050 300 3.6636 1050 250 3.3537 1050 200 2.44


S.No. S.No.

38 900 900 6.71 75 400 250 1.8339 900 750 5.79 76 400 200 1.5240 900 600 6.10 77 400 150 1.2241 900 500 5.18 78 300 300 2.1342 900 400 3.96 79 300 250 1.8343 900 300 3.35 80 300 200 1.5244 900 250 3.05 81 300 150 1.2245 900 200 2.44 82 250 250 1.52

Duct Width mm

Duct Height

mm

Additional Length (m)

Duct Width mm

Duct Height

mm


Duct Width mm

Duct Height

mm


46 800 800 5.79 83 250 200 1.2247 800 750 5.49 84 250 150 0.91


S.No. S.No.

48 800 600 5.79 85 200 200 1.5249 800 500 4.88 86 200 150 1.2250 800 400 3.66 87 150 150 0.9151 800 300 3.0552 800 250 2.4453 800 200 2.1354 700 700 4.2755 700 600 5.1856 700 500 4.5757 700 400 3.3558 700 300 3.0559 700 250 2.4460 700 200 2.1361 600 600 3.9662 600 500 3.3563 600 400 3.0564 600 300 2.7465 600 250 2.4466 600 200 2.1367 500 500 4.5768 500 400 3.6669 500 300 2.7470 500 250 2.4471 500 200 2.1372 500 150 1.8373 400 400 2.4474 400 300 2.13

Duct Width mm

Duct Height

mm


Duct Width mm

Duct Height

mm


of 72

EXTERNAL STATIC PRESSURE CALCULATIONPROTOTYPE ROOF MOUNTED PACKAGE UNIT

S.No. Duct Elements Remarks

1 Laminar flow diffuser(SD) 600mm×600mm ……….. 10 Refer Note 1

2 Straight Duct(SD) 59 59 0.408 24.07 Refer Note 2

3 Straight Duct(RD) 34 34 0.408 13.87 Refer Note 2

4 Reducer(SD) 450×450/350×375 ……………. 8.08 Refer Note 3

5 Reducer(SD) 500×575/450×575 2.95 do

6 Reducer(SD) 600×575/500×575 4.46 do

7 Reducer(SD) 650×700/600×700 3.04 do

8 Reducer(SD) 700×700/650×700 2.95 do

9 Reducer(SD) 650×600/700×700 11.73 do

10 Reducer(SD) 1300×625/1200×600 4.68 do

11 Reducer(SD) 1000×675/1300×625 10.39 do

12 Reducer(SD) 1600×675/550×2025 1.54 do

13 Reducer(SD) 1200×550/900×800 2.76 do

14 Reducer(SD) 450×450/450×575 9.83 do

15 Reducer(SD) 600×700/600×575 5.42 do

16 Reducer(RD) 550×1850/900×800 8.41 do

17 Reducer(RD) 625×1550/550×1850 3.48 do

18 Reducer(RD) 1225×625/1400×625 10.50 do

19 Reducer(RD) 1400×625/1200×625 8.38 do

20 Reducer(RD) 1200×625/950×625 10.30 do

21 Reducer(RD) 950×625/650×625 12.49 do

22 Reducer(RD) 650×625/400×625 13.23 do

23 Reducer(RD) 400×425/175×425 5.90 do

24 Reducer(RD) 400×425/400×625 8.25 do

25 Bend 22° (SD), 2no. 350mm×375mm 4.88 0.408 1.99 do

Size of Duct Elements




………………

………………

……………….

……………

……………….

……………..

…………………

…………….

…………………

…………….

…………………

…………….

…………………

…………….

…………………

…………….

…………………

…………….

…………………

…………….

…………………

…………….

…………………

…………….

of 72


S.No. Duct Elements RemarksSize of Duct

ElementsEquivalent Length(m)



26 Bend 22° (SD), 1no. 600mm×700mm 5.18 0.408 2.11 do

27 Bend 22° (SD), 1no. 700mm×700mm 4.27 0.408 1.74 do

28 Bend 22° (SD), 2no. 550mm×2050mm 17.06 0.408 6.96 do

29 Bend 22° (RD), 1no. 950mm×625mm 6.40 0.408 2.61 do

30 Bend 22° (RD), 1no. 650mm×625mm 5.18 0.408 2.11 do

31 Bend 22° (RD), 1no. 400mm×425mm 3.66 0.408 1.49 do

32 Bend 22° (RD), 1no. 175mm×425mm 1.83 0.408 0.75 do

33 Bend 45° (SD), 2no. 1300mm×625mm 15.84 0.408 6.46 do

34 Bend 90°(SD), 2no. 350mm×375mm 4.88 0.408 1.99 do

35 Bend 90°(SD), 1no. 450mm×575mm 3.35 0.408 1.37 do

36 Bend 90°(SD), 1no. 650mm×700mm 4.27 0.408 1.74 do

37 Bend 90°(SD), 1no. 675mm×1000mm 6.40 0.408 2.61 do

38 Bend 90°(SD), 1no. 1600mm×675mm 8.84 0.408 3.61 do

39 Bend 90°(RD), 1no. 1200mm×625mm 7.00 0.408 2.86 do

40 Bend 90°(RD), 1no. 625mm×1225mm 7.00 0.408 2.86 do

41 Bend 90°(RD), 1no. 650mm×625mm 4.27 0.408 1.74 do

42 Bend 90°(RD), 1no. 625mm×1550mm 9.45 0.408 3.86 do

43 1000mm×675mm ……….. ………. 22.50 Refer Note 4

44 200 mm dia. ……….. ………. 2.50 Refer Note 4

45 1225mm×625mm ……….. ………. 30.00 Refer Note 4

46 1600mm×675mm 4.00 Refer Note 5

47 1550mm×625mm 4.50 Refer Note 5

48 1200mm×550mm 62.50 Refer Note 6

49 1200mm×550mm 62.50 Refer Note 6

50 600mm×200mm 13.50 Refer Note 7

Volume Control Damper at 7.38 m/s(SD)

Volume Control Damper at 2.1 m/s (RD)

Volume Control Damper at 8.53 m/s (RD)

Fire Damper at 7.38 m/s (SD)

………………….

……………….

Fire Damper at 7.22 m/s (RD)

………………….

……………….

Sound Attenuator at 5.3 m/s (SD)

Sound Attenuator at 5.3 m/s (RD)

Curved Linear slot diffuser (RD)

of 72


S.No. Duct Elements RemarksSize of Duct

ElementsEquivalent Length(m)



51 Non Return Damper(SD) 900mm×800mm 50.00 Refer Note 8

52 Non Return Damper(RD) 900mm×800mm 50.00 Refer Note 8

547.58

Add 5% safety factor 27.38

574.95

Say 575

Notes:

1 Refer attached EH Price Catalogue of Laminar flow diffuser

2 Duct Designed at 0.408 Pa/m

3 Refer Carrier Hand Book Table attached

4 Refer ATAI Catalogue of volume control damper attached

5 Refer ATAI Catalogue of fire damper attached

6 Refer Catalogue of Sound Attenuator attached

7 Refer Catalogue of Curved Linear slot diffuser attached

8 Refer Catalogue of Non Return Damper attached

9 SD- Supply Duct

10 RD- Return Duct

Sub Total=

Total External Static Pressure

Conversion1 LPS= 2.12 CFM= 15.85 USGPM= 3.6 CMH1 CMH= 0.5889 CFM1 TR= 3.5159 kW1 kg= 2.2046 lb1 m= 3.281 ft1 bar= 10.21 m of WC= 14.5 PSI1 m= 39.37008 inches1" WC= 248.78 Pagpm/ ton= 1.5total gpm= 29341 m³/s= 15850.32 US gpm1 m/s= 196.8504 FPMU= 1 W/m²K= 0.1761 Btu/hr.ft.² °F1 ft/100 ft= 98 Pa/m

245

24/ Δt=

esp of exhaust fan

Documents