scSTREAM, fan curves and altitude/elevated temperature...

A typical fan curve from test data is done at Sea Level, room temperature. If studying a system at higher altitude or temperature, we typically correct the fan curve accordingly and also modify the air properties. Is this the proper procedure or are we double-penalizing ourselves? If so, is changing the material properties while keeping the fan curve as-is the correct way?

0 Chuel-Ho.Kim over 3 years ago

I'd say that changing the material properties while keeping the fan curve is the wrong way.

Because a fan curve in scSTREAM is express by pressure and volume flow rate.

However what is transported by the fan is mass, not volume.

I'd say you need correct both the air properties and the volume flow rate on the fan curve accordingly.
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0 wvillers over 3 years ago

I agree 100% with you @Chuel-Ho Kim and that's what I've been doing for decades (entering our 12th year of using scSTREAM BTW!). But every now and then, when a customer really wants their design to pass and as we are the bearer of bad news, we encounter these kind of arguments. Appreciate the response, and did get the same from @Nobuyuki Oshitani so that makes a least 3 of us agreeing
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