ᐅ Preparation for photovoltaic or solar thermal systems with an air-to-water heat pump
Created on: 29 Dec 2016 23:21
S
seth0487
Hello everyone!
Our construction will start in January (at least if the weather cooperates), and we have not planned for solar thermal or a photovoltaic system. Heating will be provided by an air-to-water heat pump from StiebelEltron.
Now, I would like to prepare for the possible retrofit of one of these systems. Our builder also offered us a solar thermal preparation. This includes two pipes from the utility room up to the attic, including insulation and sensor cables. It is supposed to cost €1,160.
Now I am wondering if a photovoltaic system might make more sense with an air-to-water heat pump?!
So, this is only about preparation!
The question is, what would need to be prepared for a photovoltaic system?
For your information: The offered solar thermal preparation would be routed through one of the wastewater ventilation stacks.
Could you give me some advice on this?
Our construction will start in January (at least if the weather cooperates), and we have not planned for solar thermal or a photovoltaic system. Heating will be provided by an air-to-water heat pump from StiebelEltron.
Now, I would like to prepare for the possible retrofit of one of these systems. Our builder also offered us a solar thermal preparation. This includes two pipes from the utility room up to the attic, including insulation and sensor cables. It is supposed to cost €1,160.
Now I am wondering if a photovoltaic system might make more sense with an air-to-water heat pump?!
So, this is only about preparation!
The question is, what would need to be prepared for a photovoltaic system?
For your information: The offered solar thermal preparation would be routed through one of the wastewater ventilation stacks.
Could you give me some advice on this?
T
toxicmolotof2 Jan 2017 21:16@Leser111
Don't you think that this refers not to the ventilation pipe itself, but only to the shaft? In other words: The conduit lies next to the ventilation.
Don't you think that this refers not to the ventilation pipe itself, but only to the shaft? In other words: The conduit lies next to the ventilation.
B
Bieber08153 Jan 2017 07:40If at all, wouldn’t it make the most sense to create a universal preparation? That is, suitable empty conduits into which either solar thermal or photovoltaic cables can be installed later.
Bieber0815 schrieb:
So, suitable empty conduits into which solar thermal or photovoltaic cables can later be pulled. We did the same for photovoltaic as a preparation, and that is sufficient.
However, we already use solar thermal with our air-to-water heat pump. I would not want to install those lines afterwards. The pipes plus insulation are quite rigid and very difficult to pull through later. Plus, the pipes need to carry water at least 80°C (176°F) in summer.
Regarding profitability: I don’t think it’s that bad. I haven’t calculated the payback period since it is an emergency lighting system and we got the materials quite cheaply.
But even now, on somewhat sunny days, we can supply the heating layer of our storage tank with it.
I had the same thought that preparing for photovoltaics is quite straightforward.
The question is whether solar can also be added later as easily with our heating system.
We have the StiebelEltron LWZ304 Trend. StiebelEltron also offers the LWZ304 SOL, which can be retrofitted with solar or photovoltaics.
I would have to ask our general contractor how they envision the solar preparation working with the heating system currently planned.
The question is whether solar can also be added later as easily with our heating system.
We have the StiebelEltron LWZ304 Trend. StiebelEltron also offers the LWZ304 SOL, which can be retrofitted with solar or photovoltaics.
I would have to ask our general contractor how they envision the solar preparation working with the heating system currently planned.
seth0487 schrieb:
The question is whether solar can also be retrofitted so easily with our heating system? The problem is that you will need a storage tank sized according to the collector area. At the moment, this would reduce the efficiency of your air-to-water heat pump because it would have to heat the storage tank. If you install only a small collector area, you won’t need such a large storage tank, but the benefits will also be smaller (especially in winter).
Therefore, preparing for it in advance doesn’t make much sense; it would be better to install it all at once.
Adding a large storage tank later on isn’t so simple either once everything is already built and set up. Ours is 2m (6.6 feet) high and 1m (3.3 feet) in diameter. You also need a location that can support the corresponding loads, so that must be taken into account beforehand.
seth0487 schrieb:
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I would need to ask our general contractor how they are planning to handle the solar preparation along with the currently planned heating system?!If a heat pump is used as the heat generator, I would always choose a photovoltaic system instead of a solar thermal system.Similar topics