- #1
The P-manator
- 51
- 0
Are there materials that can absorb/trap heat and accumulate it efficiently?
Can Heat Absorbing Materials Improve Fuel Cell Efficiency?
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SUMMARY
Heat-absorbing materials can significantly enhance fuel cell efficiency by effectively trapping and storing waste heat. The discussion highlights the importance of specific heat capacity, with helium being suggested as a potential heat absorber due to its high heat capacity and low mass. The thermal time constant, which relates heat capacity to thermal conductivity, is crucial for optimizing heat absorption in fuel cell designs. Understanding the specific application and design objectives is essential for selecting the most effective material.
PREREQUISITES- Specific heat capacity concepts
- Thermal time constant understanding
- Knowledge of heat absorbers in fuel cell applications
- Familiarity with materials science, particularly regarding metals and gases
- Research the specific heat capacity of various materials, including helium and metals
- Explore the thermal time constant and its implications for heat management in fuel cells
- Investigate advanced materials for heat absorption in energy systems
- Study the design principles of fuel cells and waste heat recovery systems
Engineers, researchers, and developers focused on fuel cell technology, thermal management, and energy efficiency will benefit from this discussion.
- #2
Facial
- 30
- 1
The space shuttle ceramic... but I don't know what it is.
- #3
geoorge
- 11
- 0
specific heat capacity
i think that the keyword of your question is specific heat capacity, when you apply heat to different materials you will get a different result, because the molecular structure of each one will allow the movement of the mols with a different freedom.
Substances with low specific heat such as metals require less input energy to increase their temperature. Substances with high specific heat such as water require much more energy to increase their temperature. The specific heat can also be interpreted as a measure of how well a substance preserves its temperature, i.e. "stores" heat, hence the term "heat capacity".
http://en.wikipedia.org/wiki/Specific_heat
i think that the keyword of your question is specific heat capacity, when you apply heat to different materials you will get a different result, because the molecular structure of each one will allow the movement of the mols with a different freedom.
Substances with low specific heat such as metals require less input energy to increase their temperature. Substances with high specific heat such as water require much more energy to increase their temperature. The specific heat can also be interpreted as a measure of how well a substance preserves its temperature, i.e. "stores" heat, hence the term "heat capacity".
http://en.wikipedia.org/wiki/Specific_heat
- #4
The P-manator
- 51
- 0
Thanks I've just found out a whole lot out. So for my fuel cell, it looks like I might want to use helium as my heat absorber. It'll lighten up the car as well! 
- #5
mrjeffy321
Science Advisor
- 876
- 1
Why do you say Helium?
The heat capacity depends on the amount of the substance you have. 1 gram of Helium has a MUCH higher volume than 1 gram of water.
The heat capacity depends on the amount of the substance you have. 1 gram of Helium has a MUCH higher volume than 1 gram of water.
- #6
Gokul43201
Staff Emeritus
Science Advisor
Gold Member
- 7,207
- 25
If you tell us what you are using this heat absorber for, in more detail, we can give you a complete answer.
More often than not, the quantity of importance is the thermal time constant which is the ratio of the heat capacity to the thermal conductivity...but without knowing the specifics of the design and the objectives, you really can not get even a half-good answer.
More often than not, the quantity of importance is the thermal time constant which is the ratio of the heat capacity to the thermal conductivity...but without knowing the specifics of the design and the objectives, you really can not get even a half-good answer.
- #7
The P-manator
- 51
- 0
Well it's for use in a fuel cell. I want to trap the waste heat in a special chamber. Inside that chamber there would be a heat absorber.
There's a chart on a website that said that helium had the highest heat capacity, hydrogen excepted. But what you say is also true, if I could get something that took up a small amount of space but had high heat capacity, that would be perfect. How about a metal?
There's a chart on a website that said that helium had the highest heat capacity, hydrogen excepted. But what you say is also true, if I could get something that took up a small amount of space but had high heat capacity, that would be perfect. How about a metal?
- #8
Gokul43201
Staff Emeritus
Science Advisor
Gold Member
- 7,207
- 25
And do what with the trapped heat ?The P-manator said:
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