The fan tag has no wiki summary.
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How to find the inflow pressure and outflow pressure of blower and vacuum?
To find the outflow pressure of blower and inflow pressure of vacuum is not too difficult. Does any reference information (do not need to be too accurate) of how inflow pressure of blower relate to ...
4
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2answers
116 views
Room temperature and fan orientation
So I'm in a tiny dorm room and I normally point my fan blowing outside the window to cool my room off. I've been in some debates on blowing air out or in is more effective, so I'm hoping to get some ...
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2answers
150 views
Finding an equation relating the mass of a blade of a wind turbine to its velocity
I'm writing up my physics coursework and I thought I'd try and find an equation described in the title. This is my attempt:
Is it correct?
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3answers
1k views
Is the same amount of electricity used for ceiling and table fans on different speeds?
We use ceiling and table fans in home which are can be set to low or high speeds using regulators. I want to ask that does it uses or consumes same amount of electricity at different speeds? Here, ...
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1answer
201 views
What is the relation between fan blade and air flow CFM?
If I have a motor use in 2 cases, the 1st case I use standard blade and 20% longer blade in the 2nd case.
People told me that longer blade will create higher CFM. However, I am not totally sure. ...
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4answers
708 views
Do resistor-based fan regulators save no power at all?
I have heard that the traditional resistor-based fan speed regulators are inefficient. In fact, I have noticed that such regulators tend to get hot when the fan is set to low speed. However, does that ...
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2answers
2k views
The most efficient Fan Blade Design
What could be the most efficient fan blade design? There are three main factors for a good fan: one is speed at which air is circulated; second,the volume of air it can circulate; and the third is ...
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0answers
89 views
How to calculate the fan cfm that I need to create enough static pressure for HEPA filter? [closed]
I need to pick a fan for my HEPA filter design. The room is ~80 degree C with 100% humidity. I need to clean the room volume once per minute. What formula that I should use to calculate the fan CFM?
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2answers
777 views
Direction of rotation of a celing fan
From Constellation Energy
Quick energy efficiency tip: To stay cool and manage your energy at
the same time, use ceiling fans to create a “wind chill” in rooms you
are using. The wind chill ...
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2answers
353 views
Fan blade physics
Why does a table fan eventually stop circulating air? I noticed this with every fan I ever used. The fan will work great for about 2 hours blowing air at full speed, then I notice that, even though ...
5
votes
1answer
432 views
Paper plane between two fans - is this possible?
The setup: two fans facing each other, distance around 1m. Both are turned on. In between them, place a simple paper plane and according to this video, it will fly.
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3answers
942 views
How does the Dyson air multiplier fan create negative pressure?
I'm curious as to how the Dyson air multiplier fan works. So far I understand that it creates negative air pressure that causes air behind and around the device to be sucked into the air stream and ...
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1answer
298 views
Dyson fans in ceiling?
Will it be feasible to use Dyson fans in the ceiling since it has to draw air from the back to "push" towards the front?
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1answer
115 views
Modem and cooler pad [closed]
I have a modem.Due to heating issues i fixed a double cooling fans with that.now i get a small doubt.that is "will the magnet in the fans will affect the modem in anyway?"
thanks in advance.
2
votes
1answer
257 views
Air flow coming out of a fan feels much stronger than air flow coming in. Why? [duplicate]
Possible Duplicate:
Why is exhaling more forceful than inhaling?
If I put my hand behind my computer's system block, I can feel a very strong flux of air coming out, as it is being pushed ...
4
votes
2answers
1k views
Shape of Fan Blades
How is the shape of the blades of an air fan determined? Trial and error, or is there a theory behind it? What are they trying to maximize, volume of air dislocated per rotation?
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3answers
829 views
Design of a common table fan
A few questions about the design of a common table fan, such as below.
Does the round disc (silver in the image) in front of the blades serve any functional purpose?
Does the metal casing around the ...
