Latent Heat Transfer Rate in a Pipeline help please

In summary, the conversation is about determining the rate at which liquids drop out of a gas pipeline. The person has modeled the system in a chemical process program and has obtained information such as heat of vaporization, total heat transfer, kinetic energy change, potential energy change, and fluid enthalpy change. They are seeking help in setting up an energy balance for the changing potential and kinetic energy, as well as understanding how latent heat transfer and heat transfer between the pipe and its surroundings factor into the total heat transfer.
  • #1
wsabol
12
0
Hey guys, first post.

I'm trying to determine to the rate at which liquids drop out of a gas pipeline. I've modeled the system in a chemical process program, but its only a steady state model. Anyways, here's some of what I can get out of that program:

Heat of vaporization
Total Heat Transfer
Kinetic Energy Change
Potential Energy Change
Fluid Enthalpy Change

and all the fluid properties you can imagine.

I know about latent heat transfer and how to set it up the standard evaporation cooling scenario, where you have your energy balance for the air and one for the water. But in this case where potential and kinetic are changing as well, I'm not sure how to set up my energy balance(s). Don't want all "Total Heat Transfer" encompasses... I'm told that that includes any latent heat transfer and heat transfer between the pipe and its surroundings but I'm not sure. And don't get me started on Fluid Enthalpy change...

Please help.
 
Last edited:
Engineering news on Phys.org
  • #2
Can you please provide a specific problem to focus on?
 

Related to Latent Heat Transfer Rate in a Pipeline help please

1. What is latent heat transfer rate in a pipeline?

Latent heat transfer rate in a pipeline refers to the amount of heat that is transferred or exchanged between two substances, such as a liquid and a gas, as they undergo a change in state. This change in state can be from liquid to gas (evaporation) or from gas to liquid (condensation). It is called "latent" because the heat is not directly measurable, but rather is hidden or "latent" within the change in state.

2. How is latent heat transfer rate calculated in a pipeline?

The latent heat transfer rate in a pipeline is typically calculated using the heat transfer equation Q=mL, where Q is the heat transfer rate, m is the mass of the substance undergoing the change in state, and L is the latent heat of the substance. The latent heat can be found in tables for different substances and is measured in units of energy per mass (e.g. J/kg or BTU/lb).

3. What factors affect the latent heat transfer rate in a pipeline?

The main factors that affect the latent heat transfer rate in a pipeline are the temperature difference between the two substances, the surface area available for heat transfer, and the properties of the substances involved (i.e. their specific heats and latent heats). Other factors such as flow rate, pressure, and insulation may also have an impact.

4. How can the latent heat transfer rate in a pipeline be increased?

There are a few ways to increase the latent heat transfer rate in a pipeline. One way is to increase the temperature difference between the two substances, as this will result in a larger exchange of heat. Another way is to increase the surface area available for heat transfer, for example by using a larger or more efficient heat exchanger. Additionally, using substances with higher specific heats and latent heats can also increase the overall heat transfer rate.

5. Why is understanding latent heat transfer rate important in pipeline design?

Understanding latent heat transfer rate is important in pipeline design because it can help determine the appropriate size and type of heat exchanger, as well as the necessary flow rates and pressures for efficient heat transfer. It is also important for ensuring the safe and effective transport of substances that undergo changes in state, such as liquefied gases. Properly designing the latent heat transfer rate can also help minimize energy and cost expenses in the operation of pipelines.

Similar threads

Exit flow rate in a Plate Heat Exchanger
    • Mechanical Engineering
Replies
4
Views
2K
I What is the Role of Convective Heat Transfer in Cavitation of Cryogenic Fluids?
    • Thermodynamics
Replies
7
Views
865
What is the most accurate way to calculate heating in a waterjet catcher tank?
    • Mechanical Engineering
Replies
7
Views
1K
Ts = temperature of steamModel Boiler: Negative Rate of Change of Enthalpy
    • Mechanical Engineering
Replies
17
Views
2K
How Long Should My Double Pipe Heat Exchanger Be for a 22kW Capacity?
    • Mechanical Engineering
Replies
2
Views
1K
A Heat exchange in a thermal storage based on phase change materials
    • Thermodynamics
Replies
5
Views
1K
Clarification about Heat Conduction equations
    • Mechanical Engineering
Replies
1
Views
1K
Is latent heat only released and absorbed as radiation?
    • Thermodynamics
Replies
1
Views
649
I Enthalpy change in a flow process
    • Thermodynamics
Replies
2
Views
954
Can heat flow into a body without increasing the mean kinetic energy?
    • Introductory Physics Homework Help
Replies
1
Views
674

Hot Threads

Recent Insights

Back
Top