Datasheet > 119152-02

119152-02

更新时间： 2024-02-12 16:30:14

品牌	Logo	应用领域
其他 - ETC		风机
页数	文件大小	规格书
57页	2219K
描述
145MM240V 1200 BLDC BLOWER

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119152-02 数据手册

Physical Laws for Blower Applications

In the following formulae these symbols are used:

“Standard Air”-Air at 68^OF (absolute temperature 528^O) and

29.92” Hg. (barometric pressure at sea level). The density of

such air is 0.075 lbs./cu. ft. and the specific volume is 13.29

cu. ft./lb. The specific gravity is 1.0.

P-Pressure in pounds per square inch (PSI) or inches of

mercury column (inches Hg)

CFM-Volume in cubic feet per minute

RPM-Speed in revolutions per minute

D-Density in pounds per cubic foot (lbs./cu. ft.)

H-Height of air or gas column (ft.)

The outlet pressure of a blower depends on the condition of

the air or gas at the inlet. The inlet condition is influenced by:

a-Specific gravity (the ratio of density of the gas to density

of standard air)

SG-Specific Gravity (ratio of density of gas to the density

of air)

b-Altitude (location of blower)

c-Temperature of inlet air

Basic Fan Laws Chart

VARIABLE

VOLUME

PRESSURE

HORSEPOWER

WHEN SPEED CHANGES Varies DIRECT with Speed Ratio Varies with SQUARE of Speed Ratio Varies with CUBE of Speed Ratio

RPM₂

( )

RPM₁

RPM₂

CFM₂= CFM₁

P₂= P₁

HP₂= HP₁

( )

RPM₁

WHEN DENSITY CHANGES

Does Not Change

Varies DIRECT with Density Ratio

D₂

P₂= P₁

HP₂= HP

( )

₁( )

D₁

Volume

The Volume changes in direct ratio to the speed.

V = Original Volume (1000 CFM)

Example – A blower is operating at 3500 RPM and delivering

1000 CFM. If the speed is reduced to 3000 RPM, what is the

new volume?

V = New Volume

RPM₁= Original Speed (3500 RPM)

RPM₂= New Speed (3000 RPM)

RPM₂

3000

V = V

= 1000 x

= 1000 x .857 = 857 CFM

( )

(₃₅₀₀)

RPM₁

Pressure

Pressure (barometric) varies in direct proportion

to altitude.

Let: V = Volume of standard air (1000 CFM)

Example – A blower is to operate at an elevation of 6000 feet

and is to deliver 3 PSI pressure. What pressure (standard air)

blower is required?

V = Volume of thinner air

Hg₁= Barometric pressure sea level (29.92)

Hg₂= Barometric pressure 6000’ (23.98)

29.92

Pressure = 3 x

= 3.75 or 3 3/4 PSI

Hg₁

Hg₂

29.92

23.98

V = V₁x

= 1000 x

= 1248 CFM

If it is desired to determine what pressure a 3 PSI (standard

air) blower will deliver at 6000 feet –

The pressure changes as the square of the

speed ratio.

23.98

Pressure = 3 x

= 2.4 or about 2 1/2 PSI

29.92

Example – A blower is operating at a speed of 3500 RPM and

delivering air at 5.0 PSI pressure. If the speed is reduced to

3000 RPM, what is the new pressure?

When a blower is to operate at a high altitude it is frequently

specified that the blower be capable of handling a given

volume of “standard air”. It is then necessary to determine

the equivalent volume of air at the higher altitude.

P₁= Original Pressure (5 PSI)

P₂= New Pressure

Example – A blower is to operate 6000 feet altitude and is to

handle 1000 CFM of standard air. What is the CFM of air the

blower must handle at 6000 feet altitude?

RPM₁= Original Speed (3500 RPM)

RPM₂= New Speed (3000 RPM)

RPM₂

²= 5 x .735 = 3.68 PSI

3000

P₂= P₁

= 5 x

( ) (₃₅₀₀)

RPM₁

5 0

AE99

1...49 50 515253 54 55...57

中文翻译

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与119152-02相关器件

型号	品牌	获取价格	描述	数据表
119153-01	ETC	获取价格	145MM240V 1200 BLDC BLOWER
119154-01	ETC	获取价格	145MM240V 1200 BLDC BLOWER
119155-02	ETC	获取价格	145MM240V 1200 BLDC BLOWER
11-9159	KYOCERA AVX	获取价格	Solid State Lighting Connector Update
119159002101016	KYOCERA AVX	获取价格	Board Connector, 2 Contact(s), 1 Row(s), Male, Solder Terminal, Plug
119159002101916	KYOCERA AVX	获取价格	Board Connector
119159003101016	KYOCERA AVX	获取价格	Board Connector, 3 Contact(s), 1 Row(s), Male, Solder Terminal, Plug
119159003101116	KYOCERA AVX	获取价格	Board Connector, 3 Contact(s), 1 Row(s), Male, Solder Terminal, Plug
119159004101016	KYOCERA AVX	获取价格	Board Connector, 4 Contact(s), 1 Row(s), Male, Solder Terminal, Plug
119159004101116	KYOCERA AVX	获取价格	Board Connector, 4 Contact(s), 1 Row(s), Male, Solder Terminal, Plug

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