Why do we use Cascade Refrigeration Systems?

AI Thread Summary
Cascade Refrigeration Systems are more efficient than traditional systems due to their use of multiple refrigerants that operate within optimal temperature ranges for phase changes. The efficiency comes from the ability to transfer heat more effectively during the phase change from gas to liquid, with each refrigerant designed to maximize this process. By using a combination of gases, such as propane and carbon dioxide, the system can maintain a more efficient temperature-pressure range, enhancing heat transfer. This design allows for better heat concentration and condensation, ultimately improving overall system performance. The discussion highlights the importance of selecting refrigerants that work well together to optimize efficiency in refrigeration systems.
Yousef Dajani
Messages
2
Reaction score
0
I know that the Cascade Refrigeration Systems are more efficient than the normal Refrigeration Systems, but I still don't know why?
 
Engineering news on Phys.org
My thought is that you have an effective bump in efficiency at phase change from gas to liquid and the farther you get from the bump the less efficient... So two bumps is better
 
Andy SV said:
My thought is that you have an effective bump in efficiency at phase change from gas to liquid and the farther you get from the bump the less efficient... So two bumps is better
I don't understand your opinion
 
Big sigh ... Yea I get that a lot
 
Ok so I will try to rephrase with more clarity.
Change from let's say liquid propane to a gas eats heat. But a change from gas to a thinner gas does to just not as much. Compression of that gas to a denser gas forces out the heat but not as much as compression of the propane to a liquid. So the temperature pressure range closer to where it changes phase is more efficient at moving heat. But that is not a wide range. So you get a different gas like carbon dioxide and cool it with the propane now it's a lot easier to concentrate condense into a liquid and you can stay in the temperature band that it is efficient in.
I hope that is better
 

Thread 'A practical way to vaporize fuel for high MPG?'

Here's a video by “driving 4 answers” who seems to me to be well versed on the details of Internal Combustion engines. The video does cover something that's a bit shrouded in 'conspiracy theory', and he touches on that, but of course for phys.org, I'm only interested in the actual science involved. He analyzes the claim of achieving 100 mpg with a 427 cubic inch V8 1970 Ford Galaxy in 1977. Only the fuel supply system was modified. I was surprised that he feels the claim could have been...
View full post »

Thread 'Technical Analysis on Titan Sub (Titanic Sub)'

TL;DR Summary: Heard in the news about using sonar to locate the sub Hello : After the sinking of the ship near the Greek shores , carrying of alot of people , there was another accident that include 5 tourists and a submarine visiting the titanic , which went missing Some technical notes captured my attention, that there us few sonar devices are hearing sounds repeated every 30 seconds , but they are not able to locate the source Is it possible that the sound waves are reflecting from...
View full post »

Similar threads

A discontinuous refrigerant cycle
Replies
3
Views
1K
The reservoir of refrigerant between condenser & metering device
Replies
7
Views
2K
How does metering device in an A/C cause flash gas?
Replies
10
Views
3K
How to estimate enthalpy change across a compressor in simple vapor compression cycle
Replies
1
Views
278
Why did the superheat go up as I added refrigerant?
Replies
18
Views
7K
How does a metering device on an A/C lower the pressure?
Replies
3
Views
2K
Rotary Vane Vacuum Pump Question
Replies
5
Views
2K
Entropy of a sealed room with an open-door refrigerator
Replies
5
Views
930
How does a low charge on an A/C cause the subcooling to be low
2
Replies
53
Views
11K
Pulling a vacuum on a heat pump with a recovery machine
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top