Prototypes of heat generating windmills, built by Esra L. Sorensen in 1974. The plan is for a passive heater made with soda cans, an old window, and some insulation. We receive very little for any exported power so self-consumption is preferred. February 28, 2019 at 06:18 AM. Image: prototypes of heat generating windmills, built by Esra L. Sorensen in 1974. When I asked about anyone out there doing any experimentations of their own, I was thinking more about your "readers" than the Danish tinkerers. Not sure about your approach though. Posted by: Its heat output was estimated to be 90 kilowatt at a wind speed of 14 m/s (Beaufort 7). Even the International Energy Agency doesn't mention direct conversion of wind into heat when it presents all possible options for renewable heat production. Larger systems present the same rankings the combination of mechanical windmills and mechanical heat pumps is the cheapest option but they have up to three times lower capital costs due to economies of scale. With it though, how would one control the temperature of the house? Some chose the indirect path, converting wind generated electricity into heat using electric heating appliances. This is not about math, it's about language. March 01, 2019 at 10:10 PM. Simply enter your email address and click Join. September 02, 2019 at 06:36 PM. Some low-tech cooling approaches, and "just get used to the summer heat", fall short, but a mechanical-input heat pump could also be a dehumidifier. For example how much more heat do you get when you use ground loops or ground water vs outside air? 2. The heater requires a specific battery or electricity to ignite the propane and run the fans that blow out the hot air. March 02, 2019 at 08:15 PM. In this case, it becomes possible to build a pretty reliable heating system with a smaller heat storage tank, because the combination of two often complementary energy sources increases the chances of direct heat supply. Great article. Larger systems present the same rankings the combination of mechanical windmills and mechanical heat pumps is the cheapest option but they have up to three times lower capital costs due to economies of scale. Installing a 20,000L tank is a significant expense, but might be worth it in areas with intermittent access to water or drought conditions. this would not matter so much in this context as the unutilized heat At the time, Denmark was almost entirely dependent on imported oil for heating, which left many households in the cold when the oil supply was disturbed. I did not look into wind powered cooling but it could be possible. I wonder how practical a windmill brake heater would be if you replaced the steam turbine with a stirling engine? Online shopping for Patio, Lawn & Garden from a great selection of Solar Panels, Energy Controllers, Solar & Wind Power Parts & Accessories, Solar & Wind Power Inverters & more at everyday low prices. Posted by: Consequently, the heat generating windmill is at its best as a decentralised energy source, providing heat to an off-the-grid household or in the optimal case a relatively small town or city, or an industrial area. In the end we found a simple device that monitored our PV power production beyond what was being used to charge our battery and instead of allowing this power to be exported it would divert it to heat water no matter how much or how little until the water storage reached a cutout temperature at which time the system would then export surplus power. Taking your shed off-grid is simple to achieve, good for the environment, and could save money in the long-term. One cubic meter of heated water (1 ton, 1,000 liters) can hold up to 90 kWh of heat, which is roughly one to two days of supply for a household of four persons. Generate storable heat during off-peak hours. For example in the UK, heat counts for almost half of total energy use. Posted by: I thoroughly enjoyed the article on heating with windmills. Electricity produced by renewable energy sources can be and is being converted to heat in an indirect way. Like the stangenkunst that you dedicated a few articles too? Ideal for multiple-space use (sheds, tents, patios, garages, barns) Suitable for heating small spaces Light and highly portable Produces clean burning with a high energy efficiency Easy to use Simple installation process Ideal for both indoor and outdoor application CONS Not ideal for high altitude areas (beyond 7,000 feet above sea level) Heat generating windmills are also investigated for renewable electricity production, mainly because they offer a better solution for energy storage compared to batteries or other common technologies. This would be dependent on a total volume large enough to absorb the whole days worth of heat or dual pump water into house then through ground pipes to recool it. The electrical current stored in the battery is usually 12V and is DC. The heated water can be pumped into a building for heating or washing, and the same concept could be applied to industrial processes in a factory that require relatively low temperatures. A heat generator based on this principle is basically a wind-powered mixer or impeller installed into an insulated tank filled with water. > But that's because you heat people, not spaces. If you only need hot water for washing in an off-grid household then maybe it could be more interesting to combine. Your comment has not yet been posted. Or fastest delivery Fri, Feb 17 . March 03, 2019 at 09:05 PM. What I don't quite understand is: heat will be a byproduct of using electricity anyway, since it is always the waste product in the end. They conclude that a mechanical heat pump + mechanical windmill is the most cost effective realization of wind powered heating. One of these builders, Jrgen Krogsgaard, wrote a manual in the 1970s and I have asked him if it could be published. The simplicity of direct mechanical heat production by wind brake is alluring. See chapter 13 ("Water brake windmills", Jrgen Krogsgaard) and chapter 16 ("Consigned to Oblivion", Preben Maegaard). Job van der Zwan | Posted by: So I experimented a bit toward creating more concentrated heat at a high temperature. [8]. Photo by Claus Nybroe. This article is amazing and I love the idea of this. They can be ordered inour Lulu bookstore. I'm very curious to read those results, but you did not provide the link you are talking about Hi Kris - oh shoot - so sorry. 48 hours and Saturday delivery not available on all buildings. URLs automatically linked. This prevents automated programs from posting comments. Instead of having the turbine use the water as a break, you could use the turbine to pump the water through a cooling track and suck the heat out of the house. Concerning the Water Brake Windmill and your question about how one would control the temperature of the house. The most fascinating thing about water brake windmills is that, hypothetically, they could have been built hundreds or even thousands of years ago. Mr Beams MB390 300-Lumen Weatherproof Wireless Battery Powered LED Ultra Bright Spotlight with Motion Sensor, Brown Read Review. [7]. clifdweller | Using eddy current heaters, windmills could provide direct heat at higher temperatures, making their potential use in industry even larger. Posted by: I would be interested if a mechanical windmill could be coupled with cryogenic energy storage. It's cheaper than my oil fired neighbours, 100% carbon free and practical for many people to install now. The study referenced in note 15 contradicts your claims. what language does lisa gerrard sing in. Murray Read | "Has anyone out there done any experimentations of their own?"". Of course that's impossible, so what the author wrote is obviously not what he meant. To simplify the process of powering your shed, there are kits available with all the parts you need included. How would the economics or environmental considerations be affected if you were to move a lightweight windmill during the course of the year, in order to have windmill spend most of its time where the wind is blowing or the climate is cold? March 03, 2019 at 05:45 PM. The writer of the book chapter may know, but he didn't answer my questions. Very interesting article! A direct mechanically coupled heat pump may not be as efficient as it sounds. In terms of using wind-driven mechanical heat pumps to produce heat. The researchers explain and illustrate the workings of the water brake windmill, and calculate the optimal performance of the technology. A 2013 study using a prototype calculated the efficiency of the system to be 91%. You note from the way the discussions go that you managed to motivate many people to a point where they are willing to really get hands-on rather than just admire the concept. February 28, 2019 at 11:41 AM. Due to the large energy losses for heat transportation, the heat generating windmill is at its best as a decentralised energy source, providing heat to an off-the-grid household or in the optimal case a small city. https://www.highviewpower.com/technology/. However, in the LO-FA windmill all mechanical parts for energy conversion were moved to the top of the tower. Update to my comment above: here's an Island household in Denmark where the owners have posted comparative practical results of the Calorius 37 windmill with solar thermal collectors. They require simple materials: wood and/or metal. "", Fair points. [1] [15]. The wind-powered heater can heat water for domestic or industrial purposes directly from wind energy. The Joule Machine has lower weight, smaller size, and lower costs than an electrical generator. Posted by: I wonder, if heat-generating windmills allow lightweight windmills to be economical, would that mean that they could also be portable? See our Also, could you reverse the process to cool a house? A heat pump with mechanical input could be run from wind, low-head hydro, a Stirling Engine, or even an electric motor on PV cells. Of cause it is not economical to have that much storage. I think they are claiming a round trip efficiency of 60% for electricity storage. We no longer carry the DC heater, but have other DC Appliances: https://windandsolar.com/appliances/Missouri Wind And SolarWEBSITE: https://windandsolar.comE. Could this heat storage via water tank double as a way to store potable water? Heat pumps are certainly the most efficient way to heat either stored water or a house directly however they do not operate on a varying amounts of input power as does simple resistance heating. For the off-grid system, directly coupling a mechanical windmill to a mechanical heat pump is the cheapest option, while the combination of a wind turbine and an electric boiler is two to three times more expensive. [14] The researchers calculated that at the average wind speed in the country (4 m/s of Beaufort 3), generating one kilowatt of heat requires a windmill with a rotor diameter of 8.2 meters. There is much more to win on the demand side than on the supply side, and the habit to heat the whole space of a building can indeed be questioned. [10], A heat generator based on this principle is basically a wind-powered mixer or impeller installed into an insulated tank filled with water. To convert the 12V DC current from your battery bank, you need to route the electricity from the battery through an inverter, which converts the power to AC. Intended use: Outdoor entertaining | Output: 42,000 BTUs | Fuel source: 20lb propane cylinder. Photo by Claus Nybroe. I corrected the sentence, thanks for pointing it out. This means that less solar and wind energy converters and thus less space and resources are needed to supply a certain amount of heat. 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