Hey guys, I'm currently studying topics about HVAC before I try to get a job as a mechanical engineering designer and I'm currently interested in learning about the different electrical engineering aspects in HVAC, specifically the ones that would be useful for an ME designer to know. For the ME...
Chasbean1, do you mind diving a bit more into what you said in regards to duct sizing not matter?
If I'm getting it right, you're saying that according to a fan performance curve, it does not matter what size duct they used in testing for the inlet or outlet, the fan will perform the same for...
So, I recently found out that the power that a motor has and uses are two different things (from what I understand). So the input power of a motor is electrical power, using the equation P = I*V, and the output power is mechanical power, which can be calculated using the equation P =...
Thank you for your replies, in regards to my question, it was more of trying to understand why system effect is so important at inlet and outlet from a physics perspective rather than the repercussions for not designing for it.
I'd like to try to give a response to MintJulep's comment so I can...
So, I've been reading this paper from Carrier in regards to the application of fans in commercial HVAC Equipment (Link to White Paper below) and I have a few questions regarding system effect. First, here is a following excerpt from the paper (Page 6), saying,
"Since the velocity profile at the...
Okay so from what I've gathered, essentially I'm getting confused because I'm assuming that the x-axis is zero which is not the correct assumption to make because it would make no sense for air to be flowing if there is a zero pressure differential. Okay. That makes sense. Thank you for your...
So, the above figure, is almost the same figure that is shown in the 2016 ASHRAE Handbook - HVAC Systems and Equipment (Page 21.4) with Total Pressure being defined as the fan total pressure at the outlet minus the fan total pressure at the inlet. This figure is shown in the handbook when it's...
So, I'm trying to learn what's done in the Mechanical Engineering HVAC Industry in regards to selecting a blade type for a fan. I've looked at Table 1 for Types of Fans in the ASHRAE HVAC Systems and Equipment Handbook and there it talks about the different blade types (airfoil, backward curved...
