Latest / RENEWA Sanierungsnavigator / Hydraulischer Abgleich – warum er für effiziente Heizungen so wichtig ist
Transcript
- Oliver: Effectiveness and efficiency are two very different things. And when you your heating and it gets warm, it is effective. But many systems run completely inefficient and that is expensive. And the problem is that you often it. Some heating bodies get very hot, others stay cold, the heating roars or the pump runs unnecessarily strong. One way to help is the hydraulic balance. But what exactly is it, works and why it in the funding program This is what Alexey today in the Reneva Sanierungswenniger. Hi Alexei, many people have heard term hydraulic balance, but they don't what's So what exactly Hi Olli, it's essentially the adjustment of the heating system. You just care that reached at each heating body. Not more, not less. that behind it... The is to the heat distribution and thus reduce energy consumption. The heating works more efficiently if you hydraulic equation. So now you said that heating works more efficiently. But what do you in everyday life that a heating system runs very inefficiently or not properly balanced? What you first is uneven heat distribution. have individual heat bodies. Those that close to the heating system get hot. And other heat bodies stay cold. And so that with these colder heat bodies, the temperature that the heating system generates must be higher. More flow, perhaps. This can to unpleasant side effects such as current noises or a whistle. And then you be pretty sure that the heating system is not efficiently. But why does so often that heating systems are not optimally adjusted? Yes, that has several reasons. But the main reason is that the systems often, especially older systems, never really been up. A hydraulic compensation was not must and only the few owners did because you heating system and accordingly that was not a point that was touched If you later after the building then it little bit game. that if I individual components, i.e. new windows, individual components, then of course that an impact on the individual heat needs of the rooms. And then you would actually to the hydraulic equation every time again. That's just done in practice, least in the past, practice, nobody has For several years now, funding has bit. But Tell me, hydraulic equation technically carried Imagine a system with thermostat valves, points, pipe lines. Where do you start? What do you What happens? Basically, distinguish between different procedures in the hydraulic equation. What I'm about to tell you is mainly about procedure B. is always a calculation basis. Older procedures, procedure A, are... Yes, a little bit not the of the technology and are not accepted That's it's now in the further course, that I the process B a little bit. There you do a space heating calculation That means for each single room I how much power it needs. That is of dependent on the windows, how it damped, do I have an ventilation system and so on. And then I have to this The heating loads and the heating bodies that have on out how much volume power the individual heating bodies This then the valve pre-setting and often accompanying measures are then that you the pump performance, you exchange if it not a high-efficiency pump. You recognize that. A small tip, you into the you often on the display, on the pump, which then shows how much power it But then say, how is it ensured that now every heating body gets the right amount of heating water, is with the right temperature? Space-based heating load calculation in first step. Then on the basis is determined how much water each individual heating body needs. the volume currents. Then the preset for the individual thermostat valves And if, this is especially for larger systems, can then also the values for tight control valves and out the necessary pump performance and then either the pump or the existing pump accordingly. So now we've how to implement But in end we'll about the Portmanet. So how big is the effect in practice? Or how much energy can I really save if I just do and my system has somehow run It wasn't broken for me. It has somehow run. So what can I really save if I it run? would say from 5 % to 15%, in extreme cases maybe even 20%, you can save And when to the investment that is made, it is a very cheap measure. So you don't to spend five or six-digit amounts but it's really about a few thousand euros. if you want to your body and make depending on what has happened. And that's the cost efficiency of it is comparatively good. In addition to the economic component, you also have a higher comfort, because we just talked about it if my heating body in some rooms and I can fix then the cost point not the biggest question. A special point also in heat pumps. If it hydraulic balance in heat pumps, if they are exchanged and promoted, then you this promotion if you the hydraulic balance. That's I wouldn't see as mandatory evil, but The energy savings are often significantly larger because they very sensitively to high temperature. And accordingly, you can more energy there with an old gas heater. Okay, saving is a good topic. Comfort is also good topic. Now let's the case, say as a owner or owner, I want to do this. How does it when a specialist company into building and how long does it So do I have to myself away from the rooms or are they in How long does it at end of day? Really? So in the first step, course, someone by, heat engineer or we also as an energy advisor and take at the system, including the heat transfer, the distribution and find out what is to be We determine components to calculate the heating calculation, the basis of calculating the volume currents, adjustment values for thermostat valves and then also find out how to adjust That is course dependent on how my building is dampened, what windows are installed, what heating body Maybe can also be to individual heat bodies to the temperature. And in the end, whole thing is then documented, for the funding, then important so that there funding, need a so-called VDZ formula. Yes, and you just asked the question about the duration. The list was relatively long a part of it doesn't on site, but happens in our office. We do. At the beginning of pre-order, it takes in my family's house. And then it a bit on whether not valves have If valves have to it takes another half day, if water has from the heating system, etc. If that not the case, then it goes relatively quickly. Then are in total. That was a positive surprise, something that in half a day or in a few hours. Now you in the last few that I like to deepen once again. first is the topic of heat pumps in and why that so important. And the second is the topic of what is in and how to approach Now you said that heat pumps are particularly interesting because the pre-flow temperatures work. Why is it different than, for when you heat where you should make a hydraulic equation, where the savings potential is maybe even lower than when you heat pump? When it to the heat pump, the pre-flow temperature has the greatest impact on the efficiency of the system It is also the case but the savings are simply not that great. The heat pump uses the ambient heat and there are always two possibilities to the efficiency of the heat pump. On the one hand, source temperature, that is, where I the heat, it further up or the lowering temperature, that means in this case now our pre-flow temperature, further down. And because these two temperatures come the lower temperature or the source temperature increases, the efficiency of the heat pump This is actually completely independent of the system. This with every heat pump. The exact value is of course typical of the systems, but basically can say that the ambient temperature has a very big effect. The hydraulic balance also for a heat pump. Adjusting the pre-flow temperature and the temperature of the heat pump is much easier than adjusting the source temperature. So, in any case, it to be consistent. It is difficult to the output temperature. So sense, I it me. Now you also said that is mandatory when it comes to funding. Which funding programs are there or which pots are there for something that? Yes, that's not such very simple question. depends on what you want to Basically, you can first distinguish between the federal funding on the one hand and regional funding programs from the federal states or from individual cities or districts. And with the federal funding programs, it's mainly the BAFA and the KfW. And now let's if it's such maintenance in general, of such heating, is it actually checked whether a balance would me That's actually quite simple. The hydraulic balance always sense. And there is no ifs buts. The question is, does the existing hydraulic balance to the current situation in building. Because I just briefly, when I individual components, it also a role. When I renovate the roof, then I the heat loads in the upper floor, but the ones don't at all. And that has a big impact on the hydraulic balance. Then should have the hydraulic balance adjusted You just said that hydraulic equation makes sense. That conclusion a little bit too But if a owner should one thing out of the conversation, why should you the hydraulic equation? The hydraulic equation is actually one of the measures to the efficiency of heating, to the energy consumption of entire building without somehow repairing expensive components. and then actually a noticeable effect on comfort and a bit of way functions. My room is just planned to warm and not cold. So it both a comfort topic and a cost topic. And course, the whole thing is when exchanging especially with heat pumps and accordingly it mandatory. With all funding programs I have to a hydraulic balance. And what I might want say unoptimal hydraulic balance is always better than no hydraulic balance. In best case I know exactly where which lines are laid and calculate them in In stock this often not possible, but that is not an argument. That's why we any hydraulic compensation. We'll with us. I'll thank you and hold on. Without hydraulic compensation, in a heating system is never optimal. Thank you, Alex. A few words from me My name is Michael Suhr. I am the founder and manager of Reneva. We Reneva also know how complex energy repairs are today. Full of craft calendar, countless technical possibilities and a driving jungle that many owners rather brake than motivate. This is we start. We connect energy consultations, qualified handwork and digital processes to a clearly structured system. For your budget, we the best possible renovation for your real estate, provide you highest possible funding and accompany you from the initial analysis to the implementation with only one firm contact partner. If you want to know what your real estate useful, then start the first step now. Visit us at RenewaDi and arrange an in-depth consultation.