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TabRazesMechEngr
Mechanical
Hi there,
Just wanted to ask a simple question but couldnt find a satisfactory answer yet. Actually, while calculating the esp in a duct, we usually take the index route or the critical route. But my question is that shouldnt the esp be the sum of all the routes including the index route cuz the air is being supplied to all the diffuser outlets at once, so why is the index route only considered leaving out the rest?? I understand that index route has the highest pressure drop but arent the other routes also having some pressure drop, the total esp should be = esp (index route) + esp for the other routes. And similarly for the pump head calculations as well. But we only consider the index route, why is it, can anyone please explain it. Thanks
Just wanted to ask a simple question but couldnt find a satisfactory answer yet. Actually, while calculating the esp in a duct, we usually take the index route or the critical route. But my question is that shouldnt the esp be the sum of all the routes including the index route cuz the air is being supplied to all the diffuser outlets at once, so why is the index route only considered leaving out the rest?? I understand that index route has the highest pressure drop but arent the other routes also having some pressure drop, the total esp should be = esp (index route) + esp for the other routes. And similarly for the pump head calculations as well. But we only consider the index route, why is it, can anyone please explain it. Thanks