Hello,
I want to have a house built— a single-family home with 112m² (1,206 sq ft) of living space. I assume that, according to the 2009 Energy Saving Ordinance, all houses are very well insulated. Since I’m not a fan of throwing my money away to big energy companies, the house will be equipped with an air-to-water heat pump, a ventilation system with heat recovery, and a photovoltaic system on the roof.
My simple thinking is this: the photovoltaic system generates electricity, the air-to-water heat pump uses electricity, and the ventilation system helps prevent mold and, because it operates with heat recovery, I won’t need as much electricity to keep the house warm.
I’m open to being convinced otherwise!
Best regards
I want to have a house built— a single-family home with 112m² (1,206 sq ft) of living space. I assume that, according to the 2009 Energy Saving Ordinance, all houses are very well insulated. Since I’m not a fan of throwing my money away to big energy companies, the house will be equipped with an air-to-water heat pump, a ventilation system with heat recovery, and a photovoltaic system on the roof.
My simple thinking is this: the photovoltaic system generates electricity, the air-to-water heat pump uses electricity, and the ventilation system helps prevent mold and, because it operates with heat recovery, I won’t need as much electricity to keep the house warm.
I’m open to being convinced otherwise!
Best regards
S
Slimjim8112 Oct 2011 15:16€uro schrieb:
Hello,
The basic concept is quite good, but it assumes that all key parameters match an air source heat pump and that the entire system has been precisely sized and calculated. The COP and performance curves from the manufacturers also need to be taken into account. A seasonal performance factor (SPF) of around 3.5 should then be achievable.
Best regards. Exactly, and who can calculate something like that for me? But it should not be a passive house either!
However, the additional costs unfortunately will not be zero! 😉 Yes, I think so too, but keeping electricity and water costs around 100€ would already be great!
Maybe differentiating between power (kW) and energy (kWh) could help a bit? :o I have read something about that too, but I didn't really understand it.
TomTom1 was right that the photovoltaic system should supply the air source heat pump with electricity.
By the way: For how many people are the 112 m² (plus basement?) intended? Two at the moment, soon maybe more, and hopefully not a third, without a basement!
Best regards
Slimjim81 schrieb:
TomTom1 was right about the photovoltaic system supplying power to the air-to-water heat pump.
Best regardsAHA! How was that again? :o
It doesn’t really work, as mentioned.
Otherwise, briefly: 112 sq m (1,205 sq ft) without a basement is, in my opinion, too small, especially since living space never scales proportionally to the costs.
Kind regards, TomTom.
S
Slimjim8112 Oct 2011 17:51It’s possible, but as I said, not really practical. And why not? 🙂
What’s the point of the photovoltaic system then?
Otherwise, briefly: 112 m² (1,205 sq ft) without a basement is, in my opinion, too small, especially since the living area is never proportional to the costs. What criteria do you go by to get the absolute best out of it?
Sorry, but I’ve only been dealing with this for a month and... who, what, how, why, for what reason, those who don’t ask remain ignorant :p
I can read too, but I’m not very good at searching 😀
Best regards
Slimjim81 schrieb:
Exactly, and who can calculate something like this for me? But it also should not be a passive house! Once the building data is defined, a building services engineer and energy consultant combined can help. You can send me an email. Slimjim81 schrieb:
...TomTom1 was right about the photovoltaic system supplying electricity to the L-W heat pump. That is hardly possible directly, as demand and supply differ significantly in terms of power. Indirectly, through feed-in and consumption, it works quite well. Best regards
Slimjim81 schrieb:
And why not? 🙂
What is the point of a photovoltaic system then?
What do you base it on to get the absolute best results?
Sorry, but I’ve only been dealing with this for a month and... who, what, how, why, wherefore, why, if you don’t ask you stay ignorant :p
I can read, but I’m not so good at searching 😀
Best regards Hello!
A photovoltaic system is a form of investment of your own capital with a good but rather uncertain return. The electricity produced is sold.
For direct grid feed-in, you would need, among other things, a huge buffer (storage), since most of the electricity yield occurs when heating demand is very low (in summer).
Regarding the living area: In my opinion, a house should be as large as possible—as long as it still makes sense. I originally planned just under 130 sqm (1400 sq ft) for 4 people. Adding 20 sqm (215 sq ft) cost only €5,000, about as much as the front door, and that seemed like a good investment to me. Every provider calculates this differently!!
Best regards, TomTom.
TomTom1 schrieb:
...A photovoltaic system is a type of equity investment with a good but somewhat uncertain return. The electricity generated is therefore sold. There is hardly a better guarantee than a government-subsidized, long-term feed-in tariff. Best regards
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