Mastering Chiller COP: MCQ Answers and Tips

  • Thread starter Thread starter KingMan
  • Start date Start date
  • Tags Tags
    Chiller Cop
Click For Summary
The discussion focuses on the coefficient of performance (COP) of vapor compression chillers, emphasizing that cooling capacity affects efficiency. It highlights that low cooling rates lead to reduced COP due to environmental heat leaks, while high cooling rates can cause inefficiencies. The main point of contention is whether the inefficiencies at high cooling rates stem from heat transfer and fluid friction losses, with one participant suggesting option d as the correct answer. The need for clarification on why option d is preferred over a, b, or c is also expressed. Understanding these factors is crucial for mastering chiller COP in practical applications.
KingMan
Messages
2
Reaction score
0
Summary:: MCQ about COP of chiller

The COP of a vapor compression chiller is characterized by its cooling capacity. At low cooling rates, the chiller COP is reduced by the effects of heat leaks to the environment. On the other hand, at high cooling rates, the chiller suffers from

a) the high vibration of the major moving parts
b) the inefficient operation of the expansion device
c) the high mass leaks in the vapor compression machine
d) the finite rate of heat transfer and fluid friction losses of the working fluid

I think the answer is d, anyone can assist to confirm? Much appreciated.
 
Physics news on Phys.org
This is PF, so you need to explain why you think that the answer is d, and not a, b, or c.
 
Thread 'Why wasn’t gravity included in the potential energy for this problem?'

Thread 'Why wasn’t gravity included in the potential energy for this problem?'

I’m looking at the attached vibration problem. The solution in the manual includes the spring potential energy but does NOT include the gravitational potential energy of the hanging mass. Can someone explain why gravitational potential energy is not included when deriving the equation of motion? I tried asking ChatGPT but kept going in circles and couldn't figure out. Thanks!
View full post »

Similar threads

Synhelion -- Using solar heliostat farms to create liquid fuels from Water Vapor and CO2
  • · Replies 7 ·
Replies
7
Views
2K
Recycled Energy versus Renewable Energy
  • · Replies 4 ·
Replies
4
Views
2K
Can misting systems improve HVAC efficiency?
  • · Replies 2 ·
Replies
2
Views
4K
Chemically regenerating my auto's catalytic converter?
  • · Replies 19 ·
Replies
19
Views
8K
Surface roughness in 2D sinusoidal corrugation
  • · Replies 1 ·
Replies
1
Views
4K
Other Should I Repeat My First Year of Physics Undergrad Due to Multiple Sclerosis?
  • · Replies 3 ·
Replies
3
Views
2K
How Does Solid Hydrogen Influence Astrophysics?
  • · Replies 2 ·
Replies
2
Views
5K
Investigation of hydrogen-on-demand systems (HODS)
  • · Replies 4 ·
Replies
4
Views
31K
Mathematica This Week's Finds in Mathematical Physics (Week 231)
  • · Replies 5 ·
Replies
5
Views
3K
Mathematica This Week's Finds in Mathematical Physics (Week 231)
  • · Replies 5 ·
Replies
5
Views
3K