Recent content by Povilas

Thank you kind sir, I will be forever in debt for you.:smile:

Thank you, I will try some calculations So let's say I have a mixture of two gases and styrene is 1.3% can i calculate Q like this: Q=(m1*0.013*c1+m2*0.987*c2)(T1-T2) ?

Is there any way to calculate specific heat of styrene? I've been looking for it few hours now... Thank you.

I will thank you.

I don't have any formulas, because I'm going somewhat out of my filed (i study environmental engineering). Thank you for replying.

I'm sorry, this is not really a homework, this is for my bachelor. I'm in a situation where I took more then I can handle. I will edit my first post to include what I tried.

Hello everyone, I'm having problems understanding how to calculate heat load. Does anyone know what formula should i use? I tried to calculate energy needed to cool the gases to 20 F but i need specific heat witch i don't know how to calculate. Info in the picture. Thank you for your time :)

It's foam pattern or rise. Thank you i will look into pressure-drop / flow-rate relationship for the condenser.

The main thing I need is to understand how to calculate the maximum pressure that can develop inside the system. As I understand the gases that exit the foam increase the pressure, but at the same time some gases exit the system trough condenser decreasing the pressure.

First i calculated moles of air inside the system, then i tried to calculate under the assumption that if the system gains n*T of energy it should lose the same amount. But i think this is wrong assumption. Then I calculated the amount of n(air)* T1 and n(CO2/CH2Cl2)*T2 and how fast does...

3320 is moles of air inside the system, 79.08 is moles of CO2/CH2Cl2 every line is +1 min but i think all of these calculations are wrong.

I tried to calculate the temperature and how fast does CH2Cl2 replace air in the system.

This problem is about gas exiting polyurethane foam during its production. The production line is sealed so all the gases are trapped inside. Every second foam releases: 1 mole of CO2(44.01g/mol) @ T=60C 0.318 mole of CH2Cl2(84,93 g/mol) @ T=60C The final goal is to calculate the required...

There is no exact statement but my goal is to calculate all the parameters needed to choose a condenser that can reclaim most of the CH2Cl2. Thank you for your time.

Hello, I'm having a problem calculating the final pressure before condenser. I'm calculating the pressure that builds up in a system that at the beginning has atmospheric pressure @ T=20C and is introduced with 1 mole/second of CO2(44.01g/mol) @ T=60C and 0.318 mole/second of CH2Cl2(84,93 g/mol)...