Effect of Air temp on fuel cell

In summary, the conversation discusses the effects of surrounding air temperature on the performance of a hobby grade mini-fuel cell. The question is raised whether the fuel cell will work better if placed near an air conditioner. The conversation also mentions the use of air pre-cooler in car fuel cells and its applicability on a small scale. It is suggested that humidity may play a role in the performance of the fuel cell and using a chiller to remove excess humidity can improve its efficiency.
  • #1
cosmogod
6
0
Hi!

Recently, I got a hobby grade mini- fuel cell after watching a youtube video. Sometimes the fuel cell doesn't perform steadily. What effect does the surrounding air temperature have on PEMs? will it work better if i run in near an AC? (:wink:)

I've seen some really complex images on the internet about the actual stacks used in cars, almost all of them have a thing called air pre-cooler. to what temperatures does it cool the air before it enters the cell? and is it applicable on small scale?

Regards,
 
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  • #2
It may not be the temperature that is important, it may be the humidity. At least for some designs of fuel cell. The electrodes in some designs are porous structures that can get "plugged" if water condenses on them. Running the air through a chiller before it goes through the cell can remove a lot of humidity.
 

1. How does air temperature affect the efficiency of a fuel cell?

The efficiency of a fuel cell is directly affected by the air temperature it operates in. Higher temperatures can increase the rate of reactions within the fuel cell, resulting in higher efficiency. However, if the temperature is too high, it can cause damage to the fuel cell and decrease its efficiency. On the other hand, low temperatures can slow down the reactions, leading to lower efficiency.

2. What is the optimal air temperature for a fuel cell to operate?

The optimal air temperature for a fuel cell varies depending on the type of fuel cell and its design. Generally, most fuel cells operate best within a temperature range of 60-80 degrees Celsius. However, some high-temperature fuel cells can operate at temperatures above 100 degrees Celsius.

3. How does air temperature affect the lifespan of a fuel cell?

The lifespan of a fuel cell can be affected by the air temperature it operates in. High temperatures can cause the materials within the fuel cell to degrade faster, leading to a decrease in its lifespan. On the other hand, lower temperatures can prolong the lifespan of a fuel cell but may also result in lower efficiency.

4. Can extreme temperatures damage a fuel cell?

Yes, extreme temperatures can damage a fuel cell. High temperatures can cause the fuel cell to overheat and potentially result in irreversible damage. Low temperatures can also cause damage, such as freezing of water within the fuel cell, which can lead to cracks and leaks. It is important to operate a fuel cell within its recommended temperature range to avoid damage.

5. How does air temperature affect the startup time of a fuel cell?

The startup time of a fuel cell can be affected by the air temperature it operates in. Lower temperatures can slow down the reactions within the fuel cell, resulting in a longer startup time. Higher temperatures can speed up the reactions, leading to a shorter startup time. However, it is important to note that fuel cells may require additional heating or cooling systems to reach their optimal operating temperature, which can also affect the startup time.

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