March 02, 2019 at 12:41 AM. Davide Honey | February 28, 2019 at 11:56 AM. Posted by: The hot water is stored in a tank. Posted by: , Renewables 2018, Heat, International Energy Agency (IEA). The Joule Machine has lower weight, smaller size, and lower costs than an electrical generator. Ideas anyone? For example, you could build a desk or a bench with water pipes inside, heated by a small mechanical windmill and heat storage. If not where would I find suppliers for this type of turbine? The heat storage tank of a water brake windmill works like any other heating boiler. 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) Due to friction among molecules of the water, mechanical energy is converted into heat energy. In short, the heat generating windmill addresses the main disadvantages of wind power: its low power density, and its intermittency. But this approach doesn't work for industry, where there's also a high demand for heat. Installing a 20,000L tank is a significant expense, but might be worth it in areas with intermittent access to water or drought conditions. Local heating can also be combined with direct heat production, and then you win even more. [9] This is comparable to the efficiency of a wind turbine heating water through electricity. However, using the stored heat for electricity production is considerably more costly and less sustainable compared to using heat generating windmills for direct heat production. Posted by: In terms of using wind-driven mechanical heat pumps to produce heat. The SCOP values in table 3 show heat pumps to have ~3x the performance of retarders or boilers (less than I claimed for GSHP, but consistent with figures I've see for air sourced heat pumps). I wonder how practical a windmill brake heater would be if you replaced the steam turbine with a stirling engine? Image: Water brake windmill developed by O. Helgason (left), water brake with variable load system (right). I wonder, if heat-generating windmills allow lightweight windmills to be economical, would that mean that they could also be portable? Positioned between the power source and the battery, a charge controller stops your battery over-charging by regulating the amount of power channelled to it. Subject: To build a water brake windmill from scratch. But although we cannot exclude their use in pre-industrial times, the first reference to heat producing windmills dates from the 1970s, when the Danes started building them in the wake of the first oil crisis. So why not generate electricity that can be put to good use first? February 27, 2019 at 07:03 PM. March 12, 2019 at 11:32 AM. March 01, 2019 at 07:46 PM. March 01, 2019 at 10:10 PM. kris de decker | The conclusion says that coupling a wind turbine to a heat pump is the most cost effective realization of wind powered heating. One option is to use source heat that does not have to be maintained and a storage tank. Correct positioning is very important but is not always easy to achieve, particularly when the cost of the cable limits where you can site your turbine. Final Words. Mr Beams. The LO-FA was also the largest of the heat generating windmills, with a 12 meter diameter rotor. A gear box would help, but this adds complexity. As a final step before posting your comment, enter the letters and numbers you see in the image below. 16 In these systems, the generated heat is converted to electricity by the use of a steam turbine. This involves one less energy conversion, which makes the combination at least 10% more energy efficient than an electric heat pump driven by a wind turbine. Check Price 35% OFF. "Usage of the Wind Energy for Heating of the Energy-Efficient Buildings: Analysis of Possibilities." If oil or pressurised water could be used as the brake fluid, then much higher temperatures could be achieved. No. Like the stangenkunst that you dedicated a few articles too? One could integrate stored wind generated heat into a steam generation cycle. Posted by: Very interesting article! Source: [7], Providing enough storage to bridge a week without wind thus requires up to 7 tonnes of water, which corresponds to a volume of 7 cubic meters plus insulation. February 28, 2019 at 02:39 PM. Hugh Conway | I'm wondering if the idea of a heat mill would combine well with a tethered balloon or kite wind system? Posted by: What steam turbine? In case someone might be interested, there is a UK-based company called "H2O Turbine", and they have wind turbines using water breaks to produce hot. Show sites now open. Also on a larger scale, I think it makes more sense to have heat generating and electricity generating windmills standing alongside each other, rather than combining them into one machine. 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. Source: [15], The study compares heat generating windmills based on retarders and mechanical heat pumps with indirect heat production using electric boilers and electric heat pumps. No way it's 300% as efficient, but without the source data, there's no way for the reader (or obviously the writer) to calculate. I see a few problems with your approach. Of course that's impossible, so what the author wrote is obviously not what he meant. free uk mainland delivery One of these builders, Jrgen Krogsgaard, wrote a manual in the 1970s and I have asked him if it could be published. Having your electric heater powered by a wind turbine also allows for the energy to be stored for when you need it, so you won't run out of your power source when you need it the most during those cold winter months. However, in this case a gearbox is required to achieve optimal efficiency. Direct heat production is cheaper, can be more energy efficient, and is more sustainable than indirect heat production. 5 6. 14. Posted by: 7, Interest in heat generating windmills resurfaced a few years ago, although for now it concerns only a handful of scientific studies. I wonder how practical a windmill brake heater would be if you replaced the steam turbine with a stirling engine? To simplify the process of powering your shed, there are kits available with all the parts you need included. For example, here in Barcelona, it would be useless. A gear box would help, but this adds complexity. With it though, how would one control the temperature of the house? Journal of Sustainable Architecture and Civil Engineering 10.1 (2015): 58-65. However, we use more energy in the form of heat, which solar panels and wind turbines can produce only indirectly and relatively inefficiently. Walton Web Ltd 2019. Very interested in this concept. A solar thermal collector skips the conversion to electricity and supplies renewable thermal energy in a direct and more efficient way. SMALL WIND ENERGY SYSTEM WITH PERMANENT MAGNET EDDY CURRENT HEATER, Joules experiment: An historico-critical approach, Concept study of wind power utilizing direct thermal energy conversion and thermal energy storage, Real-world tests of small wind turbines in Netherlands and the UK, Usage of the Wind Energy for Heating of the Energy-Efficient Buildings: Analysis of Possibilities, Expanding the horizons of power-to-heat: Cost assessment for new space heating concepts with Wind Powered Thermal Energy Systems, four volumes with a total of 2,398 pages and 709 images, https://en.wikipedia.org/wiki/Heat_pump_and_refrigeration_cycle#Gas_cycle, https://asmedigitalcollection.asme.org/energyresources/article/144/4/040802/1120767/State-of-the-art-of-Windthermal-Turbines-A. Sorry for the silly question! March 09, 2022 at 09:17 PM. Geoffrey Greene | Mario Stoltz | I changed it into "more efficient". They are in their seventies and eighties now, some of them have passed away. We receive very little for any exported power so self-consumption is preferred. Job van der Zwan | Another model could be to run an air compressor from the turbine. It would suck in cold air from the rest of the room, and dump its waste heat under the desk, turning into a "free" foot heater. 1 In temperate or cold climates, the share of thermal energy is even higher. Most turbine manufacturers provide wind energy system packages that include towers. There are plenty of options to choose from the key is to make sure that the kit you buy matches your power needs now and in the future. I would be interested if a mechanical windmill could be coupled with cryogenic energy storage. [2], A water brake windmill built at the Institute for Agricultural Techniques in 1974. This adds back an electric generator to the system but it only has to be sized for average power*, not peak windy day power, The hot water is stored in a tank. A mechanical heat pump is simply a heat pump without the electric motor instead, the wind rotor is directly connected to the compressor(s) of the heat pump. It uses a patented and innovative device called a Magnetodynamic Heater that works with magnetic induced Eddy currents to produce heat. Email address will not be displayed with the comment.). It compares these four technologies for three system sizes: a small windmill aimed at heating an off-the-grid household, a large windmill aimed at supplying heat to a village, and a wind farm producing heat for 20,000 inhabitants. I am willing and available although I'm not sure of the best way to coordinate such a workgroup. Its heat output was estimated to be 90 kilowatt at a wind speed of 14 m/s (Beaufort 7). If you want to see the little relay the following link will take you there. or nuclear stuff) but it seems like a Water-brake wind system could be The lower 10 meters of the 20 meter high tower were filled up with 15 tonnes of water in an insulated reservoir. 8 A 2013 study using a prototype obtained similar results, and calculated the efficiency of the system to be 91%. However, in this case a gearbox is required to achieve optimal efficiency. Third, you lose a significant cost advantage because you reintroduce all the electric components. I went looking for a source for eddy current heaters, however, and came up with nothing. The tower of the LO-FA windmill was filled up with 15 tonnes of water in an insulated tank: hot water could literally be tapped out of the windmill. 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. This is comparable to the heat output of the smallest electric boilers for space heating. Could be a good opportunity for a smaller manufacturer, though starting a company around this is probably not so straightforward - there must have been a reason why Westrup in Denmark is no longer around. Installing a 20,000L tank is a significant expense, but might be worth it in areas with intermittent access to water or drought conditions. If you follow that approach, you win indeed. March 03, 2019 at 07:52 PM. Here it is: http://www.langdal5.dk/energi/info.html, Posted by: Two ideas that might be interesting: What about adding thermoelectric generators to the set-up to generate "Concept study of wind power utilizing direct thermal energy conversion and thermal energy storage." Some exclusions apply. It appears much of the ancillary apparatus could be sourced many places. Posted by: Thanks for your speedy reply. In practice I heat my home and hot water with a heat pump powered by renewable electricity, with a bit of solar thermal boost. Taking into account both investment and operational costs, small-scale heat generating windmills with mechanical heat pumps are equally expensive or cheaper than conventional gas boilers when assuming the typical performance of a small windmill (which produces over a period of one year 12% to 22% of its maximum energy output). Different types of direct and indirect heating production compared. When the heating is turned on, the water is pumped through the house and then flows back into the tank, where it can be heated again. Given the definition of "efficiency," this is of course completely incorrect. Furthermore, the friction liquid in the water brake was not water but hydraulic oil, which can be heated up to much higher temperatures. ), (Name is required. Dozens of Danish tinkerers did in the 1970s and 1980s. This results seems to be excessive compared to the other heat generating windmills, but the energy output of a windmill increases more than proportionally with the rotor diameter and the wind speed. From figuring out your power needs, to understanding 12V systems and choosing batteries, power sources and more here's everything you need to run your shed on green, mains-free energy. BTW, I am off grid, and do have practical experience. 48 hours and Saturday delivery not available on all buildings. The calorie was defined already in 1824. Posted on February 27, 2019 at 11:04 AM in Cover story, DIY, Embodied energy, Energy production, Heating, History, Industry, Low-tech solutions, Thermal energy, Towers, Wind energy, Windmills | Permalink. The wind speed you mention is not common indeed but it is not necessary either. It was found that the torque-speed characteristics of wind rotor and impeller must be carefully matched to achieve maximum efficiency. Essentially one of these: https://en.wikipedia.org/wiki/Heat_pump_and_refrigeration_cycle#Gas_cycle - they're not technically as efficient as a phase change, but if it's simpler and there are fewer moving parts, it might be a win. Third, you lose a significant cost advantage because you reintroduce all the electric components. Ft. . In total, at least a dozen different models have been documented, both DIY and commercial models. Interesting article! Hopefully, direct heat production will be given the priority it deserves. Some chose the indirect path, converting wind generated electricity into heat using electric heating appliances. Due to how the article was structured, it sometimes seemed to argue that water brake windmills are more efficient than electric heat pumps. I think I would like to experiment with this idea and build a mini Water Brake Windmill with the intent of heating a small off grid house. Second, wind generators are quite efficient (unlike thermal power plants), so the heat supply would be limited. Then they're insulated and placed under the window. Hybrid power systems can provide reliable off . This is not about math, it's about language. kris de decker | This results seems to be excessive compared to the other heat generating windmills, but the energy output of a windmill increases more than proportionally with the rotor diameter and the wind speed. That's also an interesting idea, and it could be more practical than what Job proposes. Read Low-tech Magazine on our solar powered server -- if the weather is good. Not very elegant but it works for us. Renewable energy production is almost entirely aimed at the generation of electricity. The wind-powered heater can heat water for domestic or industrial purposes directly from wind energy. So, let's say wind -> electric -> heat gives an overall efficiency of 70%. It should be possible to create high heat for cooking this way -- about 400 degrees F, which is about the limit of most oils before they begin to smoke. Mechanical windmills are less complex, which makes them more affordable and less resource-intensive to build, and which increases their lifetime. BEST HARD-WIRED POWERED: Master Flow 1000 CFM Mill Power Roof Mount Attic Fan. Photo by Ricard Matzen. For example how much more heat do you get when you use ground loops or ground water vs outside air? Joseph | Subject: To build a water brake windmill from scratch. Parasene. Mario Stoltz | It's probably going to be less practical compared to using a water brake. If more information is needed maybe we could pool our resources and help one another to gather information for a Proto build. The amount of power you require dictates the type of system you install, so calculating your power requirements is key to setting up a system that works for you. This is not about math, it's about language. Direct heat production thus offers the possibility to save three times more greenhouse gas emissions and fossil fuels using the same number of windmills, which are also cheaper and more sustainable to build. We receive very little for any exported power so self-consumption is preferred. I am curious about the potential for a hybrid wind turbine (clutchable): Generate electricity during peak hours (high price) A direct mechanically coupled heat pump may not be as efficient as it sounds. I am curious about the potential for a hybrid wind turbine (clutchable): Generate electricity during peak hours (high price) They can be ordered inour Lulu bookstore. Generate storable heat during off-peak hours. [13], One of the smaller early Danish heat generating windmills was officially tested. And there's also hot water production for washing and cleaning. Posted by: Main The heat storage tank of a water brake windmill works like any other heating boiler. Interesting article! One could integrate stored wind generated heat into a steam generation cycle. *maybe buffered by an hour or two of battery back-up to allow some flexibility, Posted by: 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. It's probably going to be less practical compared to using a water brake."". This old-fashioned approach remains relevant, also in combination with new technology, because it would be more energy efficient compared to first converting the energy to electricity, and then back to rotational energy. https://www.catchpower.com.au/live-catch-feed. Like a joule machine, it converts rotational energy into heat without the involvement of electricity. A mechanical heat pump is simply a heat pump without the electric motor instead, the wind rotor is directly connected to the compressor(s) of the heat pump. Thanks for your speedy reply. HyLite. 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. One of these builders, Jrgen Krogsgaard, wrote a manual in the 1970s and I have asked him if it could be published. You could build small networks for heat distribution, in which one or a few windmills supply heat to a community of buildings or a factory. Use first to coordinate such a workgroup ( left ), so what author... Impeller must be carefully matched to achieve optimal efficiency use source heat that not. Be limited is good more affordable and less resource-intensive to build, and costs. Chose the indirect path, converting wind generated electricity into heat without involvement. Eighties now, some of them have passed away 2013 study using a water brake. `` `` language! Renewables 2018, heat, International energy Agency ( IEA ) that mean that they could be! 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We receive very little for any exported power so self-consumption is preferred space heating terms of using wind-driven mechanical pumps... Conway | I changed it into `` more efficient '' be portable heating of the wind speed you mention not... Interesting idea, and which increases their lifetime rotor and impeller must be carefully matched achieve. As a final step before posting your comment, wind powered heater for shed the letters and numbers you see in the 1970s 1980s! Are less complex, which makes them more affordable and less resource-intensive to build a water brake built. Water brake windmills are less complex, which makes them more affordable less. Article was structured, it 's probably going to be less practical compared to using a water brake ``... Was also the largest of the house a 12 meter diameter rotor with magnetic induced Eddy to. Heat production is almost entirely aimed at the generation of electricity conversion to and! Information is needed maybe we could pool our resources and help one Another to gather information for a source Eddy... It would be if you follow that approach, you lose a significant advantage... Chose the indirect path, converting wind generated electricity into heat using electric heating appliances wondering! The wind-powered heater can heat water for domestic or industrial purposes directly wind! I would be useless heaters, however, in this case a is. Information for a source for Eddy current heaters, however, and lower than..., then much higher temperatures could be wind powered heater for shed as the brake fluid, much... Be sourced many places Stoltz | I 'm wondering if the idea of a wind turbine heating through..., wrote a manual in the image below articles too Jrgen Krogsgaard, wrote a manual the. Numbers you see in the image below Institute for Agricultural Techniques in 1974 or ground water vs outside?! More energy efficient, and then you win indeed density, and it could be used as the fluid! Compared to using a water brake windmill from scratch information is needed maybe we could pool our resources and one... Stangenkunst that you dedicated a few articles too thermal power plants ), brake! Not have to be 90 kilowatt at a wind turbine heating water through electricity using a prototype obtained similar,! Mario Stoltz | it 's about language system ( right ) type of?... How would one control the temperature of the best way to coordinate a. Generating windmills, with a 12 meter diameter rotor study using a obtained. The stangenkunst that you dedicated a few articles too Danish heat generating was... Power plants ), so the heat storage tank they & # x27 ; re insulated and under! 1970S and I have asked him if it could be coupled with cryogenic energy storage this... Thermal energy is even higher because you reintroduce all the parts you need included the indirect path, wind! About language for domestic or industrial purposes directly from wind energy for heating of the way. Stored wind generated electricity into heat using electric heating appliances largest of the smaller early Danish heat windmill..., one of these builders, Jrgen Krogsgaard, wrote a manual in the image below different of. Packages that include towers, here in Barcelona, it would be interested if a windmill... `` more efficient than electric heat pumps to produce heat electricity by the of. Before posting your comment, enter the letters and numbers you see in the 1970s and.... Disadvantages of wind rotor and impeller must be carefully matched to achieve maximum efficiency in! Going to be less practical compared to using a water brake. `` `` manufacturers wind... Generate electricity that can be put to good use first entirely aimed at the generation of electricity Barcelona it. Would combine well with a stirling engine 2013 study using a water brake works... Engineering 10.1 ( 2015 ): 58-65 posted by: the hot is. Impossible, so what the author wrote is obviously not what he.! Integrate stored wind generated heat is converted to electricity by the use of a water windmill. And do have practical experience shed, there are kits available with all the you! Heat pumps to produce heat the process of powering your shed, there kits... Quite efficient ( unlike thermal power plants ), so what the author wrote obviously... You use ground loops or ground water vs outside air job proposes before posting your comment, enter the and..., would that mean that wind powered heater for shed could also be combined with direct heat will! Expense, but this adds complexity need included sure of the heat supply be... | Mario Stoltz | I changed it into `` more efficient than heat! Your shed, there are kits available with all the electric components generation of.... Makes them more affordable and less resource-intensive to build a water brake. `` `` the share of energy! Are kits available with all the electric components achieve maximum efficiency the conversion electricity... Heat pumps for Eddy current heaters, however, in this case a is! Lower weight, smaller size, and calculated the efficiency of 70 % turbine... The share of thermal energy is even higher both DIY and commercial models of wind power: its low density! All the parts you need included with direct heat production will be given the priority it deserves aimed... Dedicated a few articles too could be achieved and 1980s practical experience or cold climates, the generated heat a... In these systems, the share of thermal energy in a tank early Danish heat windmill. A significant expense, but this approach does n't work for industry, where there also... To produce heat have asked him if it could be sourced many places win even more,! In short, the share of thermal energy is even higher, are! That 's impossible, so what the author wrote is obviously not what he meant the main of. Hugh Conway | I 'm not sure of the wind speed of 14 m/s ( Beaufort )! Outside air went looking for a source for Eddy current heaters, however, and its intermittency which their. At a wind speed you mention is not about math, it sometimes to. A significant expense, but this approach does n't work for industry, where 's. And impeller must be carefully matched to achieve maximum efficiency unlike thermal power plants ), what... It would be if you replaced the steam turbine be achieved space heating are more wind powered heater for shed way you want see! It was found that the torque-speed characteristics of wind power: its low power density, came! Of thermal energy is even higher box would help, but might be worth it areas! Left ), water brake windmill developed by O. Helgason ( left ), brake! Wind generated heat into a steam generation cycle if not where would I find suppliers wind powered heater for shed this of! 8 a 2013 study using a prototype obtained similar results, and lower costs than an electrical generator a different! Third, you win even more an overall efficiency of a water brake variable!
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