Solar thermal project in Brittany coupled with an 11 kW heat pump

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PITMIX
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Re: Solar thermal project in Brittany




by PITMIX » 12/05/21, 08:56

Hello, some little news finally I was wrong the solar collectors arrived on May 09 at the port of Le Havre and not on April 21. This time I was contacted by the carrier who must pass the products through customs, so I am still waiting : roll:
I thought I could drop them off in Brittany before the summer, unfortunately this will not be the case ...
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Re: Solar thermal project in Brittany




by Christophe » 12/05/21, 12:11

Hi Pitmix, glad to see you again passing by :)

2 remarks (not very pleasant for your project but I still welcome the initiative)

a) Personally, I would never have ordered such heavy / bulky equipment in China given the price difference of a few hundred euros ...

b) It's a little late to say that, but even if it means ordering heavy goods in China and given the prices of photovoltaic toilets (0.3 € from China) it is rather towards this solution that I would have leaned to supply a cap from 11 kW ...

For 2000 € you would have had 6500 Wp (about twenty panels of 300 W therefore) .. with transport and customs costs, go 5000 Wp ... enough to erase a large part of the electrical overconsumption induced by the heat pump!

By the way, is it 11 kW of heat or electricity consumption?
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sicetaitsimple
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Re: Solar thermal project in Brittany




by sicetaitsimple » 12/05/21, 12:59

Christophe wrote:2 remarks (not very pleasant for your project but I still welcome the initiative)

a) Personally, I would never have ordered such heavy / bulky equipment in China given the price difference of a few hundred euros ...

b) It's a bit late to say that, but even if it means ordering heavy goods in China and given the prices of photovoltaic toilets (0.3 € from China) it is rather towards this solution that I would have looked to supply a cap from 11 kW ...


In different terms, you ask the same question as me on page 1:"out of curiosity, since you have a heat pump already installed and you seem like a handyman, why don't you rather consider installing photovoltaic panels which would at least partially supply your heat pump during the day for the" frost protection "function in winter and who would produce electricity for you the rest of the year?
Considering the budget you mention, it seems playable to me. "


But indeed it's a bit late to ask the question ...
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by Christophe » 12/05/21, 14:55

Yes indeed I read your intervention after ... but it is never too late to do better? : Cheesy:
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dede2002
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by dede2002 » 13/05/21, 07:22

Hello,

The price of PV may be competitive, but the surface required for equal power is much more important.
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by Christophe » 13/05/21, 10:33

Yes and no: PV produces (a little) with diffuse radiation and even when it rains ... nada thermal ...

And I remind you that the project is ... in Brittany! : Cheesy:
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by PITMIX » 15/05/21, 18:17

Hi Christophe! yes indeed it is a bit late but I am not saying no for the future concerning photovoltaics.
I really wanted to test this solution in thermal, even if from the point of view of piping and installation, it could be cotton. I am thinking of doing something fairly simple with several circulators, in order to provide either domestic water heating or heating, depending on the season.
I saw that even in April or May you need a little heating, and at these times, it should be more efficient than in the middle of winter.
I think a small exchanger connected to the VMC will be welcome rather than blowing in cold outside air.
I do not despair of producing a few watts even in winter and in rainy weather, because on my solar water heater in the Paris region, I maintain 200 liters of water at 25 or 30 ° C by preheating DHW with 2 thermal sensors.
I do not yet know what sauce I am going to be eaten by customs, I am waiting for the painful one, which should soon be.
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by PITMIX » 19/05/21, 22:52

Go a few more days to wait and the sensors should arrive. Transport and customs costs to my house still 450 bales.
From what I saw on Amazon equivalent solar collectors cost € 859 for 20 tubes, I thought I saw € 650 before ordering.
That's a total of 3436 € for 4x 20 tubes for the Amazon version + 35 € delivery.
The Alibaba version is 1950 Dollars for 4x20 tubes + 450 € customs and 60 € final transport.
I'm still waiting to see the models I will receive to compare with those from Amazon but they look similar.
20 tubes in both cases.
https://www.amazon.fr/Collecteur-solaire-ecopropulsion-tz5818-20R1-code/dp/B078WC67Q4/ref=mp_s_a_1_4?dchild=1&keywords=capteur+solaire+thermique&qid=1621456919&sr=8-4
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by PITMIX » 02/06/21, 12:44

That's it this time it's good I finally received my solar collectors!
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Re: Solar thermal project in Brittany coupled with an 11 kW heat pump




by PITMIX » 08/06/21, 08:44

The trip was not easy for the solar collectors.
It must be said that the seller was not very smart.
The glass tubes were packed in cardboard boxes, and very little protected by polystyrene.
These boxes deserved to be placed in a wooden box. The boxes with the glass tubes were placed below the boxes containing the collectors.
In addition, the hand-made pallet, the width of which does not correspond to any pallet truck, was exploded during the first handling.
Result 10 broken tubes.
The seller had provided 5 replacement tubes.
I have 5 tubes left to repair.
The sensors have 25 tube collectors and not 20 as I thought. Out of 105 tubes delivered, there are finally 5 broken tubes.
It's a lesser evil, but now the supplier must find me 5 more tubes from a partner in the Netherlands.
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