cool the house with a refrigerator (hear me out)

[Avatar86]

1. Buy a cheap refrigerator on blocket (300 SEK).
2. Place it on the patio/balcony.
3. Run two hoses between the residence and the refrigerator. One for incoming air / one for outgoing air.
4. Use a pax fan to push the air into the refrigerator, so it is cooled and then enters the house.

Works like a heat pump, but for 500 SEK?

 

[MrDizzy]

1. Buy a cheap refrigerator on blocket (300 kr).
2. Place it on the patio/balcony.
3. Run two hoses between the residence and the refrigerator. One for intake air / one for exhaust air.
4. Install a Pax fan to push the air into the refrigerator, so it gets cooled and then goes into the house.

Works like a heat pump, but for 500 kr?

Well, it's not the same as a heat pump with cooling function.
What a refrigerator/freezer uses is the Peltier element.
So the efficiency is under 100%
which means if you input 1kW of electricity, you might get 0.5-0.6kW of cooling
Now, a refrigerator/freezer is not on 1kW but more like 100-250W, maybe you can find something double, so say 500W
then you have about 300W of cooling
Sure it cools ... but the cost in operation ...

 

[useless]

What the fridge/freezer utilizes is a Peltier element.

Regular fridges/freezers work exactly like a heat pump. Peltier elements are only found in cheap camping/desktop coolers.

 

[MrDizzy]

Regular refrigerators/freezers work exactly like a heat pump. Peltier elements are only found in cheap camping/desktop coolers.

Oh! then I've missed something ... need to look into that!
(can't do it now though)
Thanks

 

[anders07]

A refrigerator is very inefficient because the cooling element is built into the "wall" and not designed as a cooling element that air can be blown through. If you circulate air through a refrigerator with a PAX fan, the difference in the air's temperature probably won't differ by many tenths of a degree... It would be heating for nothing...

 

[Gimp]

Regular refrigerators/freezers work exactly like a heat pump. Peltier elements are only found in cheap camping/desktop coolers.

Peltier cheap, well, I bought a 40l Peltier for my son's room for 3800:-, completely silent and able to maintain refrigerator temperature.

 

[BSOD]

Peltier cheap, well, I bought a 40l Peltier for my son's room for 3800:-, completely silent and can maintain refrigerator temperatures.

Apparently, you can buy it expensive too... 😀

But in principle, it's cheaper to install a Peltier element than a compressor. And the efficiency becomes significantly worse.

 

[Gimp]

Apparently, it can also be bought expensively... 😀

But in principle, it's cheaper to insert a Peltier element than a compressor. And the efficiency will be clearly worse.

Yes, there are cheaper ones, but they can't handle the same temperature and lack lighting.

Only child...

Efficiency, what is that...😉

 

[Emanuel01]

You can also produce electricity with Peltier elements. If you heat the hot side, you get a current on the "cold" side.

 

[Gimp]

You can produce electricity with Peltier elements as well. If you heat the hot side, you get a current on the "cold" side.

Speaking of efficiency...

 

[Emanuel01]

Speaking of efficiency...

Yes, it's not the best! Just an anecdote!

 

[Emanuel01]

Check the price and it was about 5-10k for 100w. Don't remember the details.

 

[Avemo]

1. Buy a cheap fridge on blocket (300 SEK).
2. Place it on the patio/balcony.
3. Run two hoses between the house and the fridge. One for air intake / one for air exhaust.
4. Install a pax fan to push the air into the fridge, so it cools and then goes into the house.

Works like a heat pump, but for 500 SEK?

In principle, it works just like a heat pump. But if you compare the volume it is designed to cool, you will realize the problem. The room you want to cool is much larger than a fridge and the effect is not sufficient.

 

[Emanuel01]

The prices don't match on the website but quite a fun page:https://sunnytek.se/

 

[Emanuel01]

Was interested in their wood-fired boiler but a price increase of 60k SEK dampened my interest.
Otherwise, heating and 1000w electricity.