Solving the Energy Balance Problem

In summary, the conversation is about someone reading an article on heat transfer and having difficulty understanding the terms mCpθ and mCp(θ+dθ/dx θ) in the energy balance of the fluid. The person is familiar with the energy balance for incompressible steady flow (ΔH = Q = mCpΔθ), but is confused by the idea of these terms being considered as heat flux.
  • #1
tonyjk
227
3
Hello,
I was reading an article, and I found something unfamiliar(sorry I am not into heat transfer a lot) :
Laminar_flow.png


For the energy balance of the fluid, I didn't understand the mCpθ where θ is the temperature and mCp(θ+dθ/dx θ) terms. I know that for a control volume, the energy balance for incompressible steady flow etc.. ΔH = Q = mCpΔθ. I know here we will have the same result at the end but the idea of taking these two terms as heat flux confused me.

Thank you
 
Engineering news on Phys.org
  • #2
tonyjk said:
Hello,
I was reading an article, and I found something unfamiliar(sorry I am not into heat transfer a lot) :
Laminar_flow.png


For the energy balance of the fluid, I didn't understand the mCpθ where θ is the temperature and mCp(θ+dθ/dx θ) terms. I know that for a control volume, the energy balance for incompressible steady flow etc.. ΔH = Q = mCpΔθ. I know here we will have the same result at the end but the idea of taking these two terms as heat flux confused me.

Thank you
I can see what they are doing, but I don't like it being done this way either.

Chet
 

1. What is the energy balance problem?

The energy balance problem refers to the imbalance between the amount of energy that enters the Earth's atmosphere from the sun and the amount of energy that is radiated back out into space. This imbalance can lead to changes in the Earth's climate and temperature.

2. Why is solving the energy balance problem important?

Solving the energy balance problem is important because it helps us better understand and predict changes in the Earth's climate and temperature. It also allows us to develop strategies to mitigate the effects of these changes and reduce our impact on the environment.

3. How can we solve the energy balance problem?

There are several ways to solve the energy balance problem, including reducing greenhouse gas emissions, increasing the use of renewable energy sources, and improving energy efficiency. These actions can help reduce the amount of energy entering the atmosphere and increase the amount of energy being radiated back out into space.

4. What role do humans play in the energy balance problem?

Human activities, such as burning fossil fuels and deforestation, contribute to the energy balance problem by increasing the amount of greenhouse gases in the atmosphere. These gases trap more heat, leading to an imbalance in the Earth's energy budget.

5. What are the potential consequences of not solving the energy balance problem?

If the energy balance problem is not addressed, it can lead to significant and potentially catastrophic changes in the Earth's climate and temperature. This can result in more frequent and severe natural disasters, rising sea levels, and disruptions to ecosystems and human societies. It is crucial that we take action to solve this problem to protect our planet and future generations.

Similar threads

How to determine mdot for choked airflow through a valve, given T,P
    • Mechanical Engineering
Replies
3
Views
988
Heat Equation and Energy Balance
    • Mechanical Engineering
Replies
19
Views
2K
Fin/Fan heat exchanger mass and energy balance
    • Mechanical Engineering
Replies
3
Views
2K
I Energy balance over a methanol reformer
    • Thermodynamics
Replies
4
Views
993
Fourier's Law of Heat Transfer: Conceptual Explanation
    • Mechanical Engineering
Replies
10
Views
2K
Thermodynamics energy balance for control volume
    • Introductory Physics Homework Help
Replies
1
Views
885
Engineering Tubular Reactor with catalytic walls
    • Engineering and Comp Sci Homework Help
Replies
6
Views
759
Heat Transfer Equation: Balance of Energy Explained
    • Mechanical Engineering
Replies
1
Views
999
Thermo - Simple Energy balance equation
    • Mechanical Engineering
Replies
5
Views
2K
How Does the Steady Flow Energy Equation Account for Heat Transfer?
    • Mechanical Engineering
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top