- #1
momomomoses
- 3
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fellow engineers,
hi I'm totally new here so hello everyone.
I'm a mechanical HVAC design engineer and I have a question about fan power and fan heat gain/generation. My main concern is the temperature rise in the air passing through the fan.
I've been researching in books and on the internet but haven't got any concrete result.
I'm trying to think in terms of energy. It all started with electric energy to the fan, then it is converted to the following
1) kinetic energy of the fan
2) kinetic energy of air, which causes an increase in air temperature
3) friction loss of the fan system, which is released as heat i.e. the kinetic energy or air which causes an increase in air temperature.
however at this website "www.engineeringtoolbox.com/electrical-motors-heat-gain-d_707.html"[/URL] it states that ALL fan power is converted to heat to its surrounding. I've also confirmed something like this with a Carrier engineer.
Is is possible? I always think of "air heat gain" as an increase in air motion. Am I missing something important here?
Thanks
hi I'm totally new here so hello everyone.
I'm a mechanical HVAC design engineer and I have a question about fan power and fan heat gain/generation. My main concern is the temperature rise in the air passing through the fan.
I've been researching in books and on the internet but haven't got any concrete result.
I'm trying to think in terms of energy. It all started with electric energy to the fan, then it is converted to the following
1) kinetic energy of the fan
2) kinetic energy of air, which causes an increase in air temperature
3) friction loss of the fan system, which is released as heat i.e. the kinetic energy or air which causes an increase in air temperature.
however at this website "www.engineeringtoolbox.com/electrical-motors-heat-gain-d_707.html"[/URL] it states that ALL fan power is converted to heat to its surrounding. I've also confirmed something like this with a Carrier engineer.
Is is possible? I always think of "air heat gain" as an increase in air motion. Am I missing something important here?
Thanks
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