Transform an air-water heat pump air conditioning

[Lakhdar]

MAMO, to make a boiler reading is even easier. @ +

[Capt_Maloche]

yes it's silly, but you need refrigeration equipment to make it

especially to evacuate the circuit and charge the equipment with refrigerant.

sure the result is not very expensive

otherwise there are already thermodynamic DHW tanks, which are intended to replace the "direct" electric tanks:


the thermodynamic hot water tank
count around 2000 € TTC
-25% tax credit, i.e. € 1500

against 500 € TTC for a traditional DHW tank of 250L


and a shabby COP in winter ... limited to -5 ° C outside T °. below, traditional resistance



COP 3.7 .... at 15 ° C, average annual COP of about 2 to 2.5 I suppose

I have to consume around 11 € of fuel oil per month for my DHW production, or around 132 € / year

With this stuff, I will save approx. half of my energy consumption for hot water, or approx. 66 € / year ...

return on investment 1500/66 = 23 years !!

For me, the real calculation also consists of taking into account the thermal losses of the boiler which is used for heating and DHW and which partially serves to "heat" the linen room and to dry the laundry: 40 L of fuel oil per month when even !!

40L x 0.70 € / l = 28 € / month or over 6 summer months (boiler off if replaced by tank) 6 x 28 = 168 € / year

In my personal case, the return on investment becomes:
1500 / (66 + 168) = 6.5 years is better

[Christophe]

+1 Maloche, the thermodynamic water heater is pipo, in addition it cools your cellar / cellar / local heating ...

Hi! to answer christophe, no you don't need a recharge, except if it was already working, and you take it apart. to put it back at home. for citro, an inverter is not necessary.

Well on the mamo link he talks about a refill ... I checked ...

Maloche everything is simple if you have the equipment and the knowledge ... but I don't know how to recharge the fridge circuit ...

Now considering the prices of water-water heat pumps and that I still have my idea of ​​raising the solar buffer ... I think I will have to get started in the coming months!

I have an old fridge compressor lying around that has been pumping air for years. Do you think it's refitable?

[Macro]

Yeah but if you add the energy cost of the dryer and its damping ....

[tigrou_838]

hello, this also interests me, I have been looking for quite a long time for a mini micro air / water heat pump with a maximum consumption of 500w to raise the temperature of my solar buffer for my floor heating very low temperature.

tigrou

[Christophe]

Macro, I'm here for you! The thermodynamic water heater will pump the calories from the room in which it is! For me it's not good!

No external battery if?

Tigger and Citro: look on the side swimming pool heat pumps for low temperature heating ! If I were in France I would seriously study the question (here at 21 cents per kWh it's not worth it!)

For small water-to-water heat pumps, here is the link of my thermodynamic "project": https://www.econologie.com/forums/petite-pom ... t8238.html

[Capt_Maloche]

+1 Maloche, the thermodynamic water heater is pipo, in addition it cools your cellar / cellar / local heating ...
...
I have an old fridge compressor lying around that has been pumping air for years. Do you think it's refitable?

No, the thermodynamic tank has 2 ducts to be connected outside

Your old compressor is dead !! in any case to make a fridge circuit

PS: I have the stuff of refrigeration and I am a refrigerationist by training

[Capt_Maloche]

But it is true that it is not very complicated to hack a reversible Split System at 300 €

PO EXPENSIVE

[Christophe]

A) Is there an external exchanger? I did not know ... I said nothing then!
Still, it's not profitable ...

B) Ok he's dead, I need to get something used milk then!

Do you have the gear and can you recharge / size a fridge circuit? The class!

I know one who will do a little fridge internship in Belgium next spring !! Chiche? Say yes, say yes, steupléééééééé!

[tigrou_838]

yes christophe, I had already looked at the small heat pumps for swimming pools, I had found 500 euros for one of 500w conso with a cop of 2 or 3 I do not remember anymore, but I have a problem and it takes a passage of mini 4m3 and that bothers me a little for my 1m3 tampn, fear of too much stirring.

small question to the specialist Captain is there a little trick to do to avoid this.

tigrou