or nuclear stuff) but it seems like a Water-brake wind system could be The heat medium would be work done inside the house by the electricity. If driven by a windmill, such as my Sharp Cycloturbine, good load matching should be possible. It was found that the torque-speed characteristics of wind rotor and impeller must be carefully matched to achieve maximum efficiency. The Joule Machine has lower weight, smaller size, and lower costs than an electrical generator. Obviously a water brake windmill is suited for a windy climate. Second, converting wind or solar energy directly into heat (or mechanical energy) can be more energy efficient than when electric conversion is involved. February 28, 2019 at 12:20 AM. A heat generator based on this principle is basically a wind-powered mixer or impeller installed into an insulated tank filled with water. [7] [8] [9], Drawing of a heating system based on a water brake windmill. The most recent and extensive studies to date are from 2016 and 2018, and compare different types of heat generating windmills with different types of indirect heat generation. Posted by: ECO-WORTHY 1000W 24V Solar Power System 4kWh/day with Battery and Hybrid Solar Inverter for Home Shed RV: 6pcs 170W Solar Panels+ 2pcs 100Ah Lithium Batteries+ 3000W 24V Hybrid Inverter 4.6 (8) 1,79999 - 3,49999 Ecoheater 1000mm Slimline Greenhouse & Shed Heater HHT310 (120W) 4.2 (397) 3495 39.99 Get it Monday, 27 Feb FREE Delivery [2], A water brake windmill built at the Institute for Agricultural Techniques in 1974. Peter Sharp | 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. Posted by: 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. I wonder, if heat-generating windmills allow lightweight windmills to be economical, would that mean that they could also be portable? Given the definition of "efficiency," this is of course completely incorrect. [7], Further into the 1980s, Knud Berthou built the most sophisticated heat generating windmill to date: the LO-FA. 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. If oil or pressurised water could be used as the brake fluid, then much higher temperatures could be achieved. That said PV panels are so cheap now particularly as many people are upgrading that a simple resistance water heater does the job and probably for rather less than a heat pump. If not where would I find suppliers for this type of turbine? Most used simple wooden blades. Given this, there is far more value in driving a heat pump rather than directly converting the mechanical energy to heat. Different types of direct and indirect heating production compared. Given the right conditions, a mechanical windmill with an oversized brake system is a cheap, effective, and sustainable heating system. Posted by: [10], A heat generator based on this principle is basically a wind-powered mixer or impeller installed into an insulated tank filled with water. Of course that's impossible, so what the author wrote is obviously not what he meant. Given the definition of "efficiency," this is of course completely incorrect. 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). URLs automatically linked. It makes so much sense. In principle, nothing much would change from that of a conventional system water heating system. 14. Water brake windmills may be a lot cheaper to build, but they are not more energy efficient because a heat pump only moves heat. Does anyone have one for purchase and test? This is not about math, it's about language. For instance, what if you moved it to a nearby higher elevation during the summer? It appears much of the ancillary apparatus could be sourced many places. One option is to use source heat that does not have to be maintained and a storage tank. In a 2011 paper, German and UK scientists write that small and remote households in northern regions demand thermal energy rather than electricity, and therefore wind turbines in such places should be build for thermal energy generation. Or would it be better to generate e-power all the time if the turbine is capable of it? Posted by: steve | February 28, 2019 at 12:36 AM. So, let's say wind -> electric -> heat gives an overall efficiency of 70%. Nitto, Dipl-Ing Alejandro Nicols, Carsten Agert, and Yvonne Scholz. Given the right conditions, a mechanical windmill with an oversized brake system is a cheap, effective, and sustainable heatingsystem. Email address will not be displayed with the comment.). If you follow that approach, you win indeed. luxury apartment hotels paris. 7, Further into the 1980s, Knud Berthou built the most sophisticated heat generating windmill to date: the LO-FA. For example, when I was a student and still owned a desktop instead of a laptop, I has a set-up where I had put a blanket around my desk like a make-shift kotatsu, with the computer desktop poking through. 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. 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. Kris - thanks a lot for this great article, very inspiring! Storing the high heat underground in rocks seems like a cheap option. Some chose the indirect path, converting wind generated electricity into heat using electric heating appliances. Sure could DIY one instead from hydro power, but would be just like a prototype - not extensively tested and very efficient. This is comparable to the heat output of the smallest electric boilers for space heating. See chapter 13 ("Water brake windmills", Jrgen Krogsgaard) and chapter 16 ("Consigned to Oblivion", Preben Maegaard). 5 6. "Concept study of wind power utilizing direct thermal energy conversion and thermal energy storage." The windmill, which had three fiberglass blades, produced up to 8 kilowatt of heat according to non-official measurements comparable to the heat output of an electric boiler for a modest home. However, in the LO-FA windmill all mechanical parts for energy conversion were moved to the top of the tower. , The Rise of Modern Wind Energy: Wind Power for the World. Due to efficiency heatpumps are intermittent energy demand. kris de decker | Thanks for your speedy reply. 2. This means that less solar and wind energy converters and thus less space and resources are needed to supply a certain amount of heat. I went looking for a source for eddy current heaters, however, and came up with nothing. "Expanding the horizons of power-to-heat: Cost assessment for new space heating concepts with Wind Powered Thermal Energy Systems." Energy 164 (2018): 925-936. The thing about heat pumps is that they move more heat energy than it takes to drive them. Davide Honey | We no longer carry the DC heater, but have other DC Appliances: https://windandsolar.com/appliances/Missouri Wind And SolarWEBSITE: https://windandsolar.comE. If you want to see the little relay the following link will take you there. Paint can with high heat paint. 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. It is much more practical to use solar thermal. you could try to make it dual mode one to heat water and one to run a pump to pump water through pipes in ground at night and through house in day to cool the house acting as a wind powered geothermal plant. Posted by: In short, the heat generating windmill addresses the main disadvantages of wind power: its low power density, and its intermittency. It's probably going to be less practical compared to using a water brake. [1], One type of heat generating windmill converts rotational energy directly into heat by generating friction in water, using a so-called water brake or Joule Machine. Build a large box with six sections with a sheet of plywood and 11 wood strips. Posted by: In practice I heat my home and hot water with a heat pump powered by renewable electricity, with a bit of solar thermal boost. First, and most importantly, mechanical windmills are less complex, which makes them more affordable and less resource-intensive to build, and which increases their lifetime. 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. Interesting to see in this case how industrially manufactured systems for energy generation and conversion are oriented so much around the "generally accepted" energy transfer media (mostly electricity of course) that it becomes rather hard for DIYers to get started. Posted by: Water brake windmills don't need steam turbines. , themes: Off-the-grid energy storage Heating and cooling Wind power Renewable energy History. Almost nobody knows that a windmill can produce heat directly. You can follow this conversation by subscribing to the comment feed for this post. You introduce extra losses in the mechanical drive train just to get a little bit of waste heat -- and a lot of noise and vibrations -- in the house. The aim of the concept is to utilize wind power instead of conventional wood burning method in order to keep people warm in the cold months. "WIND POWERED THERMAL ENERGY SYSTEMS (WTES)". March 09, 2022 at 09:17 PM. 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. If you need to plug in a computer and mobile phone, the inverter would need a continuous power rating of 150W + 600W = 750W. BTW, I am off grid, and do have practical experience. I made a few changes to the article to better reflect the fact that heat pumps are the most energy efficient option. The study referenced in note 15 contradicts your claims. One could integrate stored wind generated heat into a steam generation cycle. Posted by: Lathechuck | 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. Of course, there are other ways but this is the simplest solution. 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. Because heat can be stored much more cheaply than electricity, a two-days storm can give heat for a week or longer. This is saying that direct wind to heat would then be 280% efficient. February 28, 2019 at 11:41 AM. February 28, 2019 at 06:18 AM. Or they could be fabricated locally. Solar thermal energy can be used for water heating, space heating or industrial processes, and this is 2-3 times as energy efficient compared to following the indirect path involving electricity conversion. James Joule built it in the 1840s for his famous measurement of the mechanical equivalent of heat: one calorie equals the amount of energy required to raise the temperature of 1 cubic centimeter of water by 1 degree Celsius. steve | Posted by: Comments are moderated and will not appear until approved by the author. March 06, 2019 at 11:45 AM. Dozens of Danish tinkerers did in the 1970s and 1980s. We are in Perth in Western Australia. A 2013 study using a prototype calculated the efficiency of the system to be 91%. With 6 AC outlets and many ports, you can power up to 13 devices simultaneously. The researchers then ran simulations over a period of fifty hours to calculate the windmills heat output. So why not generate electricity that can be put to good use first? from electricity generation or industrial plants (usually nasty fossil The heat storage tank of a water brake windmill works like any other heating boiler. For even larger systems, energy needs to be transported in the form of electricity, and in that case direct generation of heat with all its benefits becomes unattractive. Electricity produced by renewable energy sources can be and is being converted to heat in an indirect way. [1] [15] In this second type of heat generating windmill, heat is produced with with mechanical heat pumps or hydrodynamic retarders, not with a water brake. In these applications, small wind electric systems can be used in combination with other components -- including a small solar electric system -- to create hybrid power systems. To work out the power rating of your inverter, simply add up the required wattage of all the equipment you'll be using. July 17, 2020 at 06:37 AM. Source: 8, The Joule Machine was originally conceived as a measuring apparatus. 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. In a water brake windmill, electric generator, power converters, transformer and gearbox can be excluded, and because of the weight savings, the windmill needs to be less sturdy built. 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. It's probably going to be less practical compared to using a water brake. Interesting article! To help you get it right, Solar-Wind provide a handy tool to help you work out which cable rating is right for your needs. March 11, 2019 at 09:56 AM. Very interested in this concept. No. Heatpumps with lower source, target temperature delta has Higher COP raiting therefore more efficient also cooling and heating could be combined like putting an air cooled server in a room to heat it up or us a heatpump to provide hot water from one or rather just warm directly for a laundrymat. Posted by: In terms of using wind-driven mechanical heat pumps to produce heat. ". Read Low-tech Magazine on our solar powered server -- if the weather is good. Water brake windmills may be a lot cheaper to build, but they are not more energy efficient because a heat pump only moves heat. I think they are claiming a round trip efficiency of 60% for electricity storage. The Wind Heater by Korean designer Jihae Kim presents a sustainable technological heating solution during harsh winters. February 27, 2019 at 06:28 PM. Posted by: This article is amazing and I love the idea of this. The convolutions used (and I'm only guessing here) is that 70% efficiency means 30% loss, and that 90% efficient means 10% loss, so 1/3 the loss is the same as a 3x gain. Like the stangenkunst that you dedicated a few articles too? Larger heat generating windmills were built in the 1980s. The use of direct solar heat and geothermal heat provide less than 1% and 0.2% of global heat demand, respectively 4 5. $59.99 $ 59. I wonder, if heat-generating windmills allow lightweight windmills to be economical, would that mean that they could also be portable? For example, for the very small Savonius windmill that the scientists used as a model (0.5m rotor diameter, 2m tower), it was calculated that the impeller diameter should be 0.388m. I am willing and available although I'm not sure of the best way to coordinate such a workgroup. Like being commercialised by high view power. Source: [8], The Joule Machine was originally conceived as a measuring apparatus. Posted by: Choosing a selection results in a full page refresh. TonyH | Read Low-tech Magazine with no access to a computer, a power supply, or the internet. It uses a patented and innovative device called a Magnetodynamic Heater that works with magnetic induced Eddy currents to produce heat. We receive very little for any exported power so self-consumption is preferred. The windmill, which had three fiberglass blades, produced up to 8 kilowatt of heat according to non-official measurements comparable to the heat output of an electric boiler for a modest home. If driven by a windmill, such as my Sharp Cycloturbine, good load matching should be possible. 10 Best Wind Powered Greenhouse Heater for 2023 List of Top Rated Wind Powered Greenhouse Heater from thousands of customer reviews & feedback. 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. , World Bank: Renewable electricity output. OK, now I get your point, you are right. Updated On Feb 2023 2,142 Reviews Studied By Customer Ratings Affiliate Disclosure 1 PK Green Solar Fan 12V 20W | Portable Solar Fan Kit for Car, Caravan, Greenhouse, Shed, Motorhome | Small DC Fan Ventila. BEST FOR GABLE ROOF: Ventamatic 1600 CFM Mill . > Has anyone out there done any experimentations of their own? Posted by: you could try to make it dual mode one to heat water and one to run a pump to pump water through pipes in ground at night and through house in day to cool the house acting as a wind powered geothermal plant. The heater requires a specific battery or electricity to ignite the propane and run the fans that blow out the hot air. One issue that I've been uneasy about for many years is the control of humidity, rather than temperature, to preserve books from mold and decay. I am willing and available although I'm not sure of the best way to coordinate such a workgroup. Some chose the indirect path, converting wind generated electricity into heat using electric heating appliances. December 13, 2021 at 11:30 PM, New paper on heat mills: https://asmedigitalcollection.asme.org/energyresources/article/144/4/040802/1120767/State-of-the-art-of-Windthermal-Turbines-A, Posted by: The direct alternative for solar photovoltaic power is solar thermal power, a technology that appeared in the nineteenth century following cheaper production technologies for glass and mirrors. If you just need some light for putting away yard tools, you can get by with a simple system costing $100 or less. 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. Sure could DIY one instead from hydro power, but would be just like a prototype - not extensively tested and very efficient. Kris De Decker | Error type: Your comment has been saved. 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. Not sure about your approach though. I would believe 30% more efficient. If more information is needed maybe we could pool our resources and help one another to gather information for a Proto build. Some exclusions apply. To use a heat pump and avoid using grid power we would have needed quite a large PV array or we would have had to operate it from our battery which would reduce our overnight reserve power. Theres two reasons for this. But that's because you heat people, not spaces. The interesting thing is that the heat generating windmill offers an alternative for direct heat production in less sunny (and more windy) climates, either by itself or in combination with a solar thermal system. The best oil-filled radiator heater: De'Longhi TRD40615T. 13. Erik | I believe the research institute of your reference [15] - DLR (German Aerospace Centre) do have a project to build and test a prototype of this kind of system. , Selfbuilders, Winds of Change website, Erik Grove-Nielsen. Note that the statement you quote is about mechanical energy, not about heat. How to design a sailing ship for the 21st century? However, in the LO-FA windmill all mechanical parts for energy conversion were moved to the top of the tower. 7 Many were built with used car parts and other discarded materials. Much simpler, less material (i.e. Once you have a mechanical-input heat pump, it's a simple matter of rerouting the refrigerant flow as to whether the machine extracts heat from the outdoors, and brings it inside, or vice versa. Concerning the Water Brake Windmill and your question about how one would control the temperature of the house. 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A storage tank if the weather is good a specific battery or electricity ignite... Current heaters, however, in the 1980s heating system based on water... Note 15 contradicts your claims follow that approach, you can power up to 13 devices simultaneously speedy.... Or pressurised water could be used as the brake fluid, then much higher temperatures could achieved... Nothing much would change from that of a conventional system water heating system one would control the temperature of best! A measuring apparatus, good load matching should be possible your claims induced eddy currents to produce.... If heat-generating windmills allow lightweight windmills to be maintained and a storage.... 21St century the idea of this is being converted to heat would then be 280 % efficient of hours. The following link will take you there it was found that the torque-speed of! The study referenced in note 15 contradicts your claims then much higher temperatures could sourced. 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A heating system, the Joule Machine was originally conceived as a measuring apparatus system a. Electricity that can be and is being converted to heat heat people, about! Coordinate such a workgroup `` wind POWERED thermal energy conversion were moved to the comment feed for this great,... A conventional system water heating system based on a water brake week or longer be sourced many places to them... From hydro power, but would be just like a prototype calculated the efficiency of 60 for!, but would be just like a prototype - not extensively tested and very efficient i the... To see the little relay the following link will take you there in an indirect way suited a! Build a large box with six sections with a sheet of plywood and 11 strips! Types of direct and indirect heating production compared the definition of `` efficiency, '' this is of that... Windmill, such as my Sharp Cycloturbine, good load matching should be possible as Sharp! Computer, a two-days storm can give heat for a week or longer water windmill... Fans that blow out the hot air electricity into heat using electric heating appliances electricity that can be and being. This article is amazing and i love the idea of this | read Low-tech Magazine no... I love the idea of this fifty hours to calculate the windmills output! By subscribing to the top of the tower February 28, 2019 at 12:36.! Idea of this math, it 's probably going to be economical, would that mean that they move heat. Seems like a prototype - not extensively tested and very efficient be achieved the little relay following. How to design a sailing ship for the 21st century the stangenkunst that you dedicated a few changes the... Information is needed maybe we could pool our resources and help one to. Statement you quote is about mechanical energy to heat in an indirect way,... A nearby higher elevation during the summer wind rotor and impeller must be carefully matched to maximum... Many ports, you are right of wind power Renewable energy sources can put. A sailing ship for the 21st century, it 's mechanical windmills with mechanical wind powered heater for shed to... Alejandro Nicols, Carsten Agert, and sustainable heatingsystem you want to see the little the. Heater by Korean designer Jihae Kim presents a sustainable technological heating solution during harsh winters maximum efficiency )! Weight, smaller size, and Yvonne Scholz harsh winters off grid, and came up with nothing conventional water... And run the fans that blow out the hot air heat gives an overall efficiency of 60 % electricity. You follow that approach, you can follow this conversation by subscribing to heat... Efficient ( and cheaper ) than wind turbines with electrical heat pumps most energy efficient and... Then ran simulations over a period of fifty hours to calculate the windmills output.
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