Recent content by mihalj

In all examples before they did have piston based compressor even when they did not specify it in task itself, but in solution they had shown cylinder with piston in it. Based on that I could almost safely assume that compressor is piston based. But again all those task were solved using...

OK...if you can just confirm did I understood it well as I am having problem physically seeing it. "An air compressor operates at steady state with air entering at p1=  1 bar, T1=  20 C, and exiting at p2=  5 bar." Are we talking here about boundary system and compressor itself which does...

First of all thanks for your reply. Part which I do not understand (below is the task where they are using control volume type of calculation for W = -∫vdp), they are talking about compressor and compressor will change piston location (therefore change specific volume) which holds true in...

Hi, something is a bit confusing in regards to polytropic processes.Can anyone explain why boundary work in closed system for compressor is calculated as W = ∫pdV and polytropic process after integration is generally W = -(p2V2 - p1V1)/(1-n)...(numbers behind p and V are subscripts)... When we...