Recent content by charlie95

Did I say it did? Maybe this is totally bogus. But be free to tell me where I am wrong. Don’t be so grumpy:)

During expansion(gas at very high pressure)the kinetic energy will increase because the gas is so stucked together that the repulsion force predominate.The gass has an excess of potential energy so during expansion the potential energy will decrease and the kinetic energy will increase(up to a...

temperature do not matter in this case. I only wanted to know if you have gas at high pressure on one side of heatexchanger/cooler/heater and water at low pressure one the other side if there is possible to get Liquid into the gas phase? temperature do not matter in this case.

Pressure ? If you have a heat exchanger. On the Shell side you have nitrogen gas at 35 bar, and on the tube side you have water at 5 bar. Is it possible to get water into the nitrogen side? I know the answer is yes, but I do not understand why. Is there someone who have a simple explanaton...

To get 1kg of water at 0 degrees to steam at 100degrees you need: (1Kg*4,2KJ/KgK*100K)+(1Kg*2260KJ/Kg)=2680KJ, right?

Thanks... Q= mcΔT + mlv is just for steam at 100 degrees ? So if I want the steam to increase in temperature I need to add more energy right ?? But how is the equation if want the steam to be 200 degrees?

How much energy do we need to vapourize 1 liter of water? How much energy do we need to vapourize 1 liter of water? I know that to heat up 1liter of water by 1 degree, you need 1kcal(or 4,2kj/kgK). So let us say that th water is 0 degree at start temperature, and that the boiling...

I got the Volume t be 624m3.. Is this correct? V=(26430mol*8,314J/K*mol*288K)/atmos pressure = 624 m3 I assumed that the temperature was 15 degrees.

So how do I do it ?

-------The liquid is heated at it's boiling point at constant temperature until it has completely changed state, What is the new volume?----- YES.

If I read carefully: PV=nRT... and compare density. Where can I find a table that show me the density at different temperatures? I just want to know if you spill 1 liter of methane on the ground( or liquified natural gas) how much will it expand when it goes from liquid to gas? I know that I...

But if I have 1dm3 of methane in liquid state ( 1 bar, -165 degrees), how much volume will it occupy if we vapourise it?

If you want to have methane in liquid at 1 bar, the temperature needs to be below -160 degrees. Thats why a said -165 deg. So if we for example have 1 liter(1dm3) of methane(liquid), how much volume will it uccupy if it goes from liquid-> gas ?

If we have 1m3 of methane liquid at 1 atm and -165 degrees, how much will it expand if we vapourize it? I have heard someone say that it expand with 600 times.

ok. Do a two stage compressor use less KW(kj/s) than a one stage compressor then? But are you sure that the temperature has something to with the outlet pressure? Is it not only depending on the molweight of the gas.. higher molweight, the higher pressure... or higher inlet pressure->higher...