2 replies to this topic

[smalawi]

Hi all,

i built a hysys simulation case for a turbine driven compressor we have. the compressor is a multistage compressor but with one barrel.

i have done the tubine side and linked it to the compressor, however, i need some guidelines on what to expect and what normally not accounted for in the thermodynamics part

some of the things i thought of are

1. mechanical losses, i put 3.5% of trubine power

2. thermal losess, from trubine side, no clue but i guess very small

3. flow losses cusing pressure drop in the tubine/compressor steam gas flows

4....

the reson i made the simulaiton is that i have doubts on the gas flow side, the indication is much lower than the hysys simulation and i guess i may forgot few thingsalon the way in hysys. i need to verify the gas flow by simulation first.

the compressor is a 20 MMSCFH capacity with 2230 pressure running hydrogen and 300 psi dp.

turbine is 525 psig steam with 710 f and 10,000 rpm speed

thanks for your help,

cheers,

[rambag]

Dear,

It is not possible to calculate the power of turbine if the exhaust is vacuum.Around 5-14% of the exhuast is wetness fraction.
In this case, get your gas flow calibrated calculate the power of compressor, deduct the coupling loss and use it for turbince power.

[smalawi]

thanks for your help,

acutally the turbine is noncondensing type, so the steam at the exit is superheated.

cheers,

sayed