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Battery cooling


superdiy
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I have the opposite problem.

My garage interior is way hotter than the outside ambient temps, and currently the only way I have to avoiding that is to leave the garage door open about a foot, but that's just a security risk.

 

I like the idea of running a small AC to cool the batteries (and the inverters come to think of it), but the added load on the system is not appealing at all.

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In the garage, with an AC, the entire garage temp will make the AC work all the time.

 

I like the idea of a 2nd hand chest freezer. Especially of you can make it stay at 25deg C all the time.

Just remember to make sure no hydrogen builds up.

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In the garage, with an AC, the entire garage temp will make the AC work all the time.

 

I like the idea of a 2nd hand chest freezer. Especially of you can make it stay at 25deg C all the time.

Just remember to make sure no hydrogen builds up.

 

No way I'm going to cool the entire garage - it will be a small, well insulated battery housing/box only.

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No way I'm going to cool the entire garage - it will be a small, well insulated battery housing/box only.

Exactly ... 2nd hand chest freezers have all the insulation you need.  :D

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I am going the A/C route. The fact that my desk is right next to my battery bank and I will benefit too make this an easy decision. I am also looking for extra load on the very sunny days and it might as well be an AC.

The way to go for you no question...
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I did that as a matter of fact ... AC and batts all in my office.  :D

 

Batts are in a cupboard with a temp sensor and you can see them getting close to 30deg C if the AC is off.

Just now need to get a AC with a inverter that I can run it off the 1600VA inverter also. Wish I knew about inverter AC's back when I had the aircon installed.

 

Side note: If I had more panels, with a larger inverter, I can save monies on expensive AC / Fridges et al, just throw panels at the problem.  :D

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Thing is, will the extra energy used to keep the batteries cool not cost you more in the longer run???

Peltiers and AC uses loads of power, so what do we have that is free?

 

Well, generally our municipal water is cold and does not cost too much.

So why not put some radiators around your batteries.

Everytime somebody opens a tap, the municipal water runs through the radiators cooling the batteries.

 

Anybody heard of geothermal heating/cooling?

Basically you install miles and miles of piping under the ground, say 2m deep.

This deep under it should stay cool in summer and "hot" during winter.

You now circulate this water with a small pump in a closed loop.

Coupled with a heatpump it can provide cooling in summer and heating in winter.

 

I'm sure a small homemade system should work well for keeping batteries cool.

Hardest part would be to get radiators to suite the batteries.

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Thing is, will the extra energy used to keep the batteries cool not cost you more in the longer run???

 

That is a burning issue, but I'll experiment a bit if and when I receive my peltiers.

 

Well, generally our municipal water is cold and does not cost too much.

So why not put some radiators around your batteries.

Everytime somebody opens a tap, the municipal water runs through the radiators cooling the batteries.

 

That is a good idea. For some people it might work. Unfortunately nobody is home during daytime, so it won't work for me. Once everyone is in bed the water will also stop flowing.  :(

 

Anybody heard of geothermal heating/cooling?

Basically you install miles and miles of piping under the ground, say 2m deep.

This deep under it should stay cool in summer and "hot" during winter.

You now circulate this water with a small pump in a closed loop.

Coupled with a heatpump it can provide cooling in summer and heating in winter.

 

I'm sure a small homemade system should work well for keeping batteries cool.

Hardest part would be to get radiators to suite the batteries.

 

I'm aware of that - unfortunately not an option for me either - where I stay we don't have any soil below about 500mm, only round river rocks - rocks against rocks against rocks.  A few years ago I got a construction company to add a double garage and living area to our place and they had to dig approximately 1.5m deep to get to the level of the road (sloped plot) and on day 1 they broke 3 digger loaders.  :(

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That is a good idea. For some people it might work. Unfortunately nobody is home during daytime, so it won't work for me. Once everyone is in bed the water will also stop flowing.  :(

 

So yesterday evening we took a dive in the pool at around 22:00 and then showered afterwards - we only used cold water in the shower, but the water felt warmer than the pool water. So this morning when we took a shower again, we again only used cold water and it still felt luke warm, so I decided to go measure the water temperature with my digital thermometer and the reading was 28.6

post-594-0-36058100-1453442834_thumb.jpg

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Anyone though of using an evaporative cooler?

 

As the name suggests an evaporative cooler works on the principle where water evaporates and causes a cooling effect. Unfortunately as the water evaporates, the air becomes more saturated / humid and the less evaporation and cooling will occur. For an evaporative cooler to continue to work effectively, you have to add or replace the surrounding air with dryer / less humid air on a regular basis. In very humid areas those coolers will also have less of an cooling effect compared to when they are used in dryer / less humid areas e.g. Durban vs. Karoo.

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