You are here:
let the pressure down from 1500 psi to 800 psi
let the pressure down from 1500 psi to 800 psi
You explaination is clear as mud or you are trying to describe a perpetual motion machine.
If you have 20 liters/second of CO2(at STP) that is 6.7 lb-moles/hour. the energy required to boost the CO2 at a 80% polytropic efficency is 1.621 KW. The discharge temp will be 125 C. a small piston compressor is all you need. It's a simple single stage job.
If you want to let the pressure down from 1500 psi to 800 psi, a piston type would be best for the small volume. Youd have to let down nearly 2twice as much CO2 to get the power required to pump it up.
If you want to see one that might work, go here.
Thank U dcasto your energy exchange dehydration pumps are the closest approximation to our problem - I noticed your past expert input, and now I can add the missing power source to our project - thermal @ 200 deg C.
The thermal source is finite, thus reduces temp as it is used the mass may easily hold >1 Gj
Ambition is to assemble a closed loop rotary expander with shaft output of 6 KW to harness the thermal mass, thus the power required to pump it up is available.
Question is: the fluid state at higher pressure appears supercritical (higher density) at the inlet of the expander which drives a shaft at the desired 6 KW ( 2 - 6 ) by the pressure difference (drop) X throughput volume, which is expanded - How to best recirculate this pressure reduced output, given I have more high pressure supercritical fluid than I can use with no extra moving parts - I believe cyclic mixing with this high pressure is achievable to reduce external pump up demand. After all the pressures need to be equalized before remixing in the closed loop. Any suggestions ? Magnetic pumps
The thermal source is finite, thus reduces temp as it is used the mass may easily hold >1 Gj
Ambition is to assemble a closed loop rotary expander with shaft output of 6 KW to harness the thermal mass, thus the power required to pump it up is available.
Question is: the fluid state at higher pressure appears supercritical (higher density) at the inlet of the expander which drives a shaft at the desired 6 KW ( 2 - 6 ) by the pressure difference (drop) X throughput volume, which is expanded - How to best recirculate this pressure reduced output, given I have more high pressure supercritical fluid than I can use with no extra moving parts - I believe cyclic mixing with this high pressure is achievable to reduce external pump up demand. After all the pressures need to be equalized before remixing in the closed loop. Any suggestions ? Magnetic pumps
2011-08-01
