新空气到水平的热泵
I have an oil boiler/hot water baseboard system as the initial heat source. I then installed two 12kBTU Fujitsu low temp mini splits in the main part of the house and tonight (9F) they are doing fine. I am planning to finalize the switch to all electric soon. However, I must admit I like baseboard heat a little bit more than hot air heat. It made me think about Air to Water (A2W) heat pumps.
As most of you know, the problem with A2W systems to date is that the water temps they produce (e.g., 110-120F) will not work well with existing residential baseboard systems designed for 180F boilers. But recently I was speaking with The Radiant Store in Troy NY and they mentioned that there are new systems rumored to be out in the near future that may be high output. Then today I saw an article about an A2W heat pump developed by Feenstra/VattenFall in the EU that is purported to deliver 160-180 water using C02 and a big buffer tank.
Obviously a plug and play A2W unit that works with my existing baseboard would be a game changer for me and many others who have baseboard. I am wondering if anyone has any further knowledge about this system (or other A2W systems that might be on the horizon) and when we might see interesting new developments in this area….either in high temp units or some other advancement in these systems…
GBA Detail Library
由气候和房屋部分组织的一千个建筑细节的集合
答复
有趣的是，这是在我今天的内置框中：
“如果您对SpacePak感兴趣，但是担心这些单元是否会在您的寒冷气候下起作用，我们为您带来了好消息：新的冬至拆分逆变器系统能够在气候下同时提供暖气和冷却AS -20F。”
链接是：https://www.smallplanetsupply.com/spacepak
I know nothing about it, just forwarding what I received. It does sound interesting.
Yes thanks. These seem to be nice units that probably borrow technology from Air to Air low temp split systems; then marry it to a water heating unit in a monobloc design. I think because they are R-410 based, they top out around 120F, effectively eliminating the plug and play aspect for existing baseboard systems designed for 160-180F water temps. The online seminar they offered in February seems interesting and may portend future models with higher working temps, however.
对于设计新系统的人们来说，120F系统似乎与地板，低温辐射器，FCU甚至高效的踢脚线（如Smith H-2型号）一样，可以很好地搭配使用，这些板板像Smith H-2型号一样，以120F的价格发布了近400 BTU的每英尺。他们还通过FCU提供冷却。当然，与强制空气系统一起考虑或竞争。但是，很难比较其中一些的最终效率。
What I did was to add some panel radiators to supplement my baseboards and run them all at low temperature. Combined with some envelope improvements that's worked great--I rarely have to raise my water temperature above about 95 F. You can also consider floor or ceiling radiant heating where that's easy to add for effective heating without high temperatures.
Hi Nick, Thanks for letting us know about this. It is absolutely what I am looking for as well, albeit full radiators, not baseboard heat. I wish it were here already, and from what they are saying it will 'be rolled out later this year' meaning it is not present even in the Netherlands, much less the UK which they see as their next market. Somebody has to be planning one of these for the US market?! I'm not urgently in the market for this right now, as the old gas boiler continues to plod along, but wow, I am ready for this! Link below to the announcement from Vattenfall.
https://group.vattenfall.com/uk/newsroom/pressreleases/2022/vattenfall-launches-heat-pump-solution-to-solution-to-replace-gas-boilers
There are some that can get you to 130-140 F, which might be enough if you also do some improvement of the envelope, and maybe adding a few extra emitters. For example,https://enertechusa.com/products/air-source
谢谢！这看起来很有趣，果然。
我也很想将老化的燃气锅炉换成空对水热泵。与LG Therma V一样，我关注了基于欧洲R32的A2W系统。与其R410系统相比，这些似乎能够在较低的空气温度下产生更高的水温。LG的最新“ Monobloc S”可以使130F的水量降至5F，保持95％的额定能力，这似乎很好。
Most of my baseboard is oversized for the current heat load, and I've calculated that I can lower my water temperature pretty far (in most rooms), though 130F at my coldest outdoor temperatures (design ~8F) might be tight.
I'd love to see more of these C02 based heat pumps enter the market, though!