Greenheck QEM Скачать руководство пользователя страница 3 | Manualshive

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background image

9-Blade Wheel

12-Blade Wheel

Octave Band

Sound Power (dB)

1 2 3 4 5 6 7 8

LwA

100

90

80

70

Sound Performance

Figures 2 and 3 show the inlet and outlet sound
spectrums for the size 33 unit used in the above
performance comparison.

Lower Sound Power (LwA)

The overall A-weighted sound power levels for
identical performance requirements show that the
12-bladed wheel design is quieter.

Easy to Attenuate

High sound power levels in the first and second
octave bands are difficult to attenuate. The 12-bladed
wheel generates less low frequency sound power.

Improved Sound Quality

A sound spectrum with a dominant tone can be
annoying to a listener. Greenheck’s 12-bladed wheel
provides balanced sound power levels across the
octave bands. This results in sound that is pleasing to
the listener.

Air Performance

Figure 1 plots the fan performance and efficiency of
two fans running at the same rpm. Increased wheel
efficiency allows the 12-bladed fan to produce more
airflow while using less energy.

9-Blade Wheel

12-Blade Wheel

Octave Band

Sound Power (dB)

1 2 3 4 5 6 7 8

LwA

100

90

80

70

Figure 1

Figure 2

Figure 3

8

7

6

5

4

3

2

1

0

80%

70%

60%

50%

40%

30%

20%

10%

0%

Static Pr

essur

e (in. wg)

Static Ef

ﬁciency

0 5 10 15 20 25 30 35

Volume (cfm x 1000)

9-Blade

Wheel

12-Blade Wheel

RPM

Efﬁciency

Air Performance Comparison

Size 33 @ 1400 RPM

Inlet Sound Comparison - Size 33

Outlet Sound Comparison - Size 33

Advantages of 12-Blade Wheels

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performance is adequate, recent industry trends have seen the emergence
of 12-blade wheel designs where customers demand higher mechanical
efficiency and lower sound levels.

Model QEM and QEP plenum fans feature a 12-blade aluminum airfoil
construction wheel. As demonstrated in Figure 1, this 12-blade design
meets customer needs by providing higher efficiency, lower sound levels
as well as lower energy consumption.

Greenheck’s 12-blade wheel design features extruded aluminum blades
up to and including size 49, while the largest sizes utilize laser cut, die-
formed aluminum blades. The two performance examples below demonstrate the
superior performance of the 12-blade design.

4J[F1FSGPSNBODF$SJUFSJBPG$'.!JOXH

8IFFM

Type

RPM

#SBLF

HP

Motor

HP Size

Static

Eff.

LwA

#MBEF

2607

7.76

10

96

#MBEF

2400

6.37

90

4J[F1FSGPSNBODF$SJUFSJBPG$'.!JOXH

8IFFM

Type

RPM

#SBLF

HP

Motor

HP Size

Static

Eff.

LwA

#MBEF

1469

26.9

30

96

#MBEF

1416

23.9

92

Performance Comparison
9 vs. 12-Blade Wheels

3

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Содержание QEM

Страница 1: ...Plenum Fans Models QEM and QEP Belt and Direct Drive September 2008...

Страница 2: ...FST t FOFSBM TVQQMZ BOE SFUVSO TZTUFNT Advantages of the QEM vs QEP Greenheck offers two solutions for your plenum design needs The QEM is a cost effective solution for performances in class I and mos...

Страница 3: ...0 60 50 40 30 20 10 0 Static Pressure in wg Static Ef ciency 0 5 10 15 20 25 30 35 Volume cfm x 1000 9 Blade Wheel 12 Blade Wheel RPM Ef ciency Air Performance Comparison Size 33 1400 RPM Inlet Sound...

Страница 4: ...4 Standard Construction and Features QEM Arrangement 9 Motor on Right QEP Arrangement 3...

Страница 5: ...d bore size specifications Other bearing design features include concentric mounting collars no set screws which provide superior grip force between the collar and the fan shaft as well as zerk fittin...

Страница 6: ...6 Optional Construction QEP QEM Inlet Guard Protective Cage Shaft Guard Belt Guard Protective Cage Structural Isolation Base Inlet Guard Protective Cage Belt Guard Protective Cage...

Страница 7: ...eight at each mounting point Isolation Base QEP Provides a known space envelope for the complete fan assembly Compact C channel platform welded for superior rigidity and solid foundation Extended Life...

Страница 8: ...PO NPUPS GSBNF TJ F t PUPS TMJEF CBTF QSPWJEFT GPS DPOWFOJFOU CFMU UJHIUFOJOH QEP Arrangement 3 Horizontal Motor on Frame Top Sizes 12 73 t PNQBDU EFTJHO XJUI NPUPS NPVOUFE UP UPQ PG GBO t P TFQBSBUF...

Страница 9: ...DPOWFOJFOU CFMU UJHIUFOJOH QEM Arrangement 4 Horizontal Direct Drive Sizes 15 36 t JOJNBM NBJOUFOBODF XJUI OP CFMUT BOE QVMMFZT t PX WJCSBUJPO MFWFMT t PNQBDU TQBDF TBWJOH EFTJHO XJUI NPUPS EJSFDUMZ...

Страница 10: ...velocity of the air in the discharge ductwork As shown below it is derived by multiplying the appropriate coefficient by the velocity pressure Effects of Air Density Ratings in the fan performance ta...

Страница 11: ...1 54 1 60 1 66 1 72 1 78 1 85 200 1 25 1 29 1 34 1 39 1 44 1 49 1 55 1 61 1 67 1 73 1 79 1 86 1 93 2 00 250 1 34 1 39 1 44 1 49 1 55 1 61 1 67 1 73 1 79 1 86 1 93 2 00 2 07 2 15 300 1 43 1 49 1 54 1 6...

Страница 12: ...tain a specific fan performance Partial wheel widths are available in JODSFNFOUT SBOHJOH GSPN o The charts on these pages allow for a quick estimation of the required fan size and motor speed to achie...

Страница 13: ...3 7 2 4 2 2 2 8 6 4 2 0 0 0 1 0 5 0 1 5 1 27 30 33 36 40 44 49 54 60 33 22 20 18 16 30 27 24 36 40 44 49 54 8 6 4 2 0 0 0 1 0 5 0 1 5 1 7PMVNF DGN Y 7PMVNF DGN Y Static Pressure in wg 7PMVNF DGN Y Sta...

Страница 14: ...68 68 63 61 60 67 60 77 69 72 63 46 67 77 69 74 63 47 68 1600 100 82 72 74 72 67 64 74 80 77 71 73 70 64 64 61 72 60 69 73 70 62 61 71 70 74 70 62 60 60 71 2200 100 86 77 74 84 74 73 71 70 83 80 86 7...

Страница 15: ...1 61 46 74 60 82 87 72 47 73 83 87 72 64 47 73 1600 100 73 78 73 68 67 80 74 70 64 64 61 72 60 73 74 73 70 63 63 71 74 73 73 69 63 63 71 2200 100 79 86 74 73 68 80 74 79 88 72 71 68 64 60 73 80 88 70...

Страница 16: ...0 77 74 69 68 66 77 80 77 77 76 71 66 62 74 60 71 64 64 60 73 76 70 64 64 60 73 2000 100 76 79 77 86 73 68 80 76 79 78 87 73 72 68 84 60 80 78 86 70 70 67 84 81 78 70 69 67 83 2800 100 86 86 82 89 82...

Страница 17: ...69 70 64 47 67 1400 100 76 79 80 78 69 84 80 74 82 74 72 72 61 79 60 73 73 80 71 66 66 73 73 79 70 60 74 1900 100 79 80 87 98 84 78 73 96 80 78 78 84 91 79 79 71 64 90 60 78 77 82 87 74 74 69 76 76 8...

Страница 18: ...1700 100 82 84 94 89 88 86 83 78 94 80 82 82 90 86 84 82 77 71 90 60 82 83 89 84 82 80 70 88 82 83 89 84 82 80 70 88 2300 100 91 91 92 98 96 94 91 87 101 80 90 89 89 94 93 90 80 97 60 90 90 91 93 90...

Страница 19: ...62 81 78 78 82 77 76 73 66 62 81 100 83 87 90 88 86 83 77 94 80 83 92 86 84 82 76 71 90 60 83 91 82 79 74 70 88 83 91 82 79 74 70 88 2100 100 92 93 99 97 92 88 102 80 92 90 91 96 94 91 86 81 98 60 91...

Страница 20: ...4 62 82 78 83 80 74 69 64 64 81 1400 100 82 84 101 94 91 86 82 74 97 80 79 83 98 90 87 82 76 70 93 60 81 83 93 83 78 73 70 89 82 83 91 83 81 77 71 70 87 2000 100 89 91 98 102 96 91 88 106 80 88 90 102...

Страница 21: ...87 82 77 72 60 84 60 79 84 80 70 64 62 82 80 83 80 74 69 81 1300 100 84 88 103 92 87 82 98 80 81 87 99 91 88 83 76 71 94 60 83 86 87 84 79 74 71 90 84 86 93 84 82 77 73 71 88 1700 100 89 92 99 104 100...

Страница 22: ...87 82 77 72 60 83 60 81 84 80 69 63 81 81 83 79 74 69 66 81 1100 100 84 91 101 94 90 86 80 73 97 80 81 89 97 90 86 81 70 93 60 83 88 93 86 82 77 73 70 89 83 87 90 83 80 76 72 70 87 100 89 94 101 103 9...

Страница 23: ...2 100 86 102 96 92 87 82 74 98 80 83 92 99 92 88 82 76 71 94 60 91 94 87 84 79 74 71 90 90 92 82 77 73 72 88 1400 100 91 96 103 100 91 87 80 90 94 101 101 96 90 84 80 101 60 93 96 90 81 79 96 96 97 94...

Страница 24: ...9 68 700 100 83 84 76 78 74 68 62 84 80 81 91 80 71 70 64 62 79 60 80 90 78 68 67 62 77 80 91 80 68 67 62 60 78 1000 100 86 100 87 83 78 74 94 80 86 93 100 83 79 71 68 92 60 84 93 80 71 68 67 87 84 96...

Страница 25: ...79 83 72 64 62 49 71 60 79 82 70 62 48 69 81 79 69 62 60 49 68 600 100 82 76 76 72 66 61 83 80 82 91 78 70 69 63 60 78 60 81 89 76 68 61 76 82 91 77 68 66 61 77 100 88 96 97 86 84 81 76 72 91 80 87 96...

Страница 26: ...8 67 100 88 94 82 77 77 72 67 61 83 80 90 78 72 69 64 61 78 60 84 89 76 69 66 62 76 90 77 69 66 62 60 77 800 100 90 98 97 87 82 78 74 93 80 90 97 96 83 79 72 69 90 60 88 94 91 80 71 69 67 86 89 97 92...

Страница 27: ...6 100 91 93 82 78 77 72 67 61 83 80 88 89 77 72 69 61 77 60 86 88 69 66 62 87 89 76 69 66 63 61 76 700 100 92 99 87 81 77 73 92 80 91 99 93 83 78 74 71 68 88 60 90 94 88 79 74 71 69 67 84 92 96 89 79...

Страница 28: ...1 77 60 89 86 70 66 62 60 90 88 70 66 63 61 76 100 102 88 86 82 78 74 93 80 94 101 92 84 79 72 69 90 60 92 96 88 80 72 70 68 98 89 80 76 72 71 69 86 900 100 99 103 102 98 91 87 83 100 80 94 100 99 93...

Страница 29: ...68 61 76 60 91 84 73 70 66 62 60 74 92 86 74 70 66 63 61 600 100 97 103 94 89 87 83 79 94 80 96 103 92 80 76 73 70 91 60 98 88 81 76 73 71 70 86 97 99 88 81 76 73 72 71 87 800 100 99 104 101 98 94 91...

Страница 30: ...74 73 67 60 76 60 92 81 71 70 62 60 73 94 83 71 70 63 61 74 100 98 103 90 88 86 81 77 73 92 80 96 103 86 83 78 74 71 68 89 60 97 83 79 74 71 70 68 98 99 83 78 74 72 70 69 86 700 100 99 99 98 93 90 86...

Страница 31: ...80 71 69 64 62 60 73 100 99 102 90 88 86 81 77 73 92 80 98 101 86 83 78 72 69 88 60 96 96 83 79 74 72 70 69 84 99 97 83 79 72 71 70 600 100 100 98 97 92 89 80 99 80 96 103 94 92 86 81 79 76 94 60 94 1...

Страница 32: ...n Side Dimensions shown are in inches Dimensions Size A C D E F G H Motor Frame Sizes 8FJHIU lbs Min Max 12 20 13 13 00 184T 120 20 13 13 00 184T 120 16 21 00 24 63 5 140 18 23 00 27 63 26 13 3 38 26...

Страница 33: ...II Min Max Min Max I II 12 11 38 24 88 38 00 184 143 213 140 140 11 38 24 88 38 00 213 213 140 140 16 27 00 27 63 40 00 213 160 MOTOR ON RIGHT STANDARD E MAX MOTOR ON LEFT OPTIONAL A SQ QEP Arrangeme...

Страница 34: ...F Motor Frame Size Range 8FJHIU lbs Class I Class II I II Min Max Min Max I II 18 24 63 213 180 190 20 26 13 27 38 21 13 43 00 182 200 240 22 28 38 29 38 23 00 182 240 290 24 30 13 31 13 49 00 184 310...

Страница 35: ...0 286 286 67 00 89 00 1600 324 1700 324 1700 66 67 13 69 00 184 286 69 00 1700 Not available 324 102 00 1800 324 73 63 102 00 1900 73 92 00 46 00 76 00 213 326 2000 326 326 2200 364 112 80 2200 364 11...

Страница 36: ...ehensive selection of top quality innovative air related equipment We offer extra value to contractors by providing easy to install competitively priced reliable products that arrive on time And build...

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