Expert: T.K.sesha Subramanian Date: 9/24/2003 Subject: Reciprocating Air Compressors
Question I am looking for an online engineering applet or simulator to check my energy balance equations.
Does compressor input power - indicated power = convection and radiation losses?
Your response to this query would be greatly appreciated
Yours faithfully
Brad Kucks
Answer the power terms regarding compressor are, 1)couplling power 2)indicated power 3)blade power 4)effective power, all are in descesnding order.
coupling power-indicated power=mechanical losses
indicated power-blade power=leakage loss+ return flow loss
blade power-effective power=loss due to friction
hope you might have understood better. the above mentined losses will come in to picture only when the heat transfer is neglected. while including also heat transfer these terms will come. but at any point of time, the difference between coupling and indicated will never be equal to heat losses alone.
for further more details please refer standard heat transfer books. BEJAN, CENGEL... are few books to get clear idea about convection and radiation and at the same same time you also refer books for turbomachinery.
