Cooling heated gas under pressure with water

AI Thread Summary
To reduce the temperature of air in a thermally insulated spherical container from 1000 F to 500 F, water must be injected, but the exact amount needed is not specified. The scenario involves a mixture of air and alcohol, complicating the calculations. The final pressure in the container will be influenced by the cooling effect of the air and the pressure increase from the water turning into steam. The discussion emphasizes the theoretical nature of the problem and the need for simplified calculations. Understanding this example is crucial for addressing a more complex project related to compressed heated gas.
alabra27
Messages
3
Reaction score
0
If I have a spherical container with volume 10 in^3 filled with air at 1000 F and 100 psi pressure and the container is thermally insulated, how much water (initial T=10 F) I need to inject inside this container to reduce the temperature to 500 F? What would the final pressure inside the container be (The air will reduce pressure due to the cooling, but the water will increase the pressure due to turning into steam)?
I know this is very difficult, so I am looking for approximated and simplified ways to get some ball park numbers.
Thx
Peter
 
Science news on Phys.org
alabra27 said:
If I have a spherical container with volume 10 in^3 filled with air at 1000 F and 100 psi pressure and the container is thermally insulated, how much water (initial T=10 F) I need to inject inside this container to reduce the temperature to 500 F? What would the final pressure inside the container be (The air will reduce pressure due to the cooling, but the water will increase the pressure due to turning into steam)?
I know this is very difficult, so I am looking for approximated and simplified ways to get some ball park numbers.
Thx
Peter

Welcome to the PF. What is the application? Is there only air inside initially? Why are you cooling with water?
 
Hi Berkeman, gald to be here,
There is no application. The question is theorethical. I am working on a problem involved something of comressed heated gas, but it's so complex to explain. This simple example , if answered, will give me the understanding I need to complete my complex project.
Actualy the air in my question in reality is mixture of 10:1 air and alchohol which is then heated inside the container and because of the heating increased the pressure.
I thought air only would make the job easy for the people trying to help me here.
All numbers are not as the real situation but made up for easy calculation.
Appreciate your reply
 
Oh I missed a question.
I must use water for the cooling. This requirement came from the customer.
 

Thread 'Entropy and configurations of microstates'

I was watching a Khan Academy video on entropy called: Reconciling thermodynamic and state definitions of entropy. So in the video it says: Let's say I have a container. And in that container, I have gas particles and they're bouncing around like gas particles tend to do, creating some pressure on the container of a certain volume. And let's say I have n particles. Now, each of these particles could be in x different states. Now, if each of them can be in x different states, how many total...
View full post »
Thread 'Why work is PdV and not (P+dP)dV in an isothermal process?'

Thread 'Why work is PdV and not (P+dP)dV in an isothermal process?'

Let's say we have a cylinder of volume V1 with a frictionless movable piston and some gas trapped inside with pressure P1 and temperature T1. On top of the piston lay some small pebbles that add weight and essentially create the pressure P1. Also the system is inside a reservoir of water that keeps its temperature constant at T1. The system is in equilibrium at V1, P1, T1. Now let's say i put another very small pebble on top of the piston (0,00001kg) and after some seconds the system...
View full post »

Similar threads

I Effects on Engine Overheating and Pressure Dynamics
Replies
4
Views
2K
I How can visible gas bubbles remain intact inside frozen water?
Replies
8
Views
1K
I Calculating Cooling Effect in Gas Cylinder Expansion
Replies
3
Views
4K
I Volume of water consumed by vacuum
Replies
5
Views
2K
B Cooling effect of evaporation occurs even if the surroundings are colder?
Replies
10
Views
2K
I Is equilibrium vapor pressure different in vacuum and in air?
Replies
2
Views
2K
Decompression of dry air in relation to temperature
Replies
3
Views
2K
I Measuring Steam Condensate from my Steam Cleaner
Replies
8
Views
2K
B Are wind farms stealing the cooling capacity of the wind?
Replies
4
Views
3K
B Energy seems to disappear when gas is compressed?
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top