Looking to save money and take part or all of your Home or Biz off-grid? Looking to keep your mobile mining going over WIMAX WISP Services (or Satellite Internet) even when the power goes out, especially out it the "boonies" (Pi Network, Electroneum, et al)?
GYROWIND helps you do just that.
As usual, when trying to design any device in micro form, getting a nice blend of performance, durability and a REALLY low price right is hard, really hard to design.
Below I explain how we used Qblade to help us design the GYROWIND Power Generator with a 1.2 kiloWatt power rating we have labelled the model 18_36, a small Darrieus 5 blade Eggbeater "VAWT" Vertical Axis Wind Turbine, with a 2:1 'height to width" design ratio (sometimes referred to in the past as EHD "Enhanced Height vs. Diameter", being 6 feet wide at the working diameter's widest point and 12 ft tall, mounted on a 50 ft tower or pole (15m tall).
Building a Wind turbine which requires no tax payer subsidy of any kind and have it compete with thermal (gas or diesel powered generators) is all about Levelized Cost of Energy (LCOE). On this note, as an engineer, Who cares that thermal electricity generation is 50-60% efficient in its , especially when thermal consumes non-renewable and produces lots of cancer generating pollutants and looses 50% of that power on average traversing power lines to get to the wall chack. In that regard big Generation is really only 25-30% efficient to the wall jack.
This is why LCOE needs to factor in cost to the environment (land, air, water) and distance from source of use (transmission/distribution losses) which in most calculations by vendors out there it does not. When you consider the latter distance losses caused by cable resistance and bad connectors , all of them loosing the electricity as heat, (aside from the pollutant and disposal problems of thermal) Wind starts to look awfully good extracting and converting 50% of the available wind kinetic energy after losses, especially in micro form at the power source of use, like the 18_36 GYROWIND Power Generator.
That said, wind like sun are intermittent sources of power, and that is why GYROWIND is only interested in selling you a solution with 3rd party name brand proven battery controllers and reliable,safe and proven battery systems to let the batteries be your delivery mechanism to your local source of power use. GYROWIND also uses AC cabling to the power source of use which should be co-located with the power controller and battery system to keep your more expensive and less efficient DC cabling as short as possible back and forth between the controller and your battery bank.
GYROWIND 18_36: 1.2 KILOWATTS OF POWER GENERATION: HOME , COTTAGE AND SMALL USE WITH BATTERIES
Our new project GYROWIND micro power generator has been in the works for years. The 18_36 design below is built on 12 plus years of research fixing the Darrieus Wind Turbine to be cost effective, high performance in low mount turbulent winds and really durable IN FIVE BLADE FORM. Also GYROWIND makes use of our new EXoBlade technology sporting an exo-skeleton rib cage of sorts to join three panels together to form a 1/2 rotor blade, where each panel is joined together with low cost rib connectors. No expensive rotor blade moulds required, just much less expensive rotor module connector moulds, which helps to seriously reduce the cost of rotor blade building so we can offer the 18_36 at a very low cost with what we think is the best price performance is the business. So we are very excited about our low cost Exoblade design break through.
Before you take the above steps to reduce production costs dramatically to address durability and low cost, you have to get performance right.
Countless CFD runs and a few well placed field trails later, we are confident the GYROWIND 18_36 Power Generator finally sports great performance figures which ensure the rotor blade system is responsive in low and medium turbulent wind and performance as expected in rated wind speeds of 11m/s on a 15 m tall pole or tower, a height typical in the industry.
Geometry and Telemetry of a five blade Darrieus "EggBeater" is tricky. Only through several trial and error runs on CFD (Qblade in our case from TU Berlin Computational Fluid Dynamics Center) compared against actual field trail data we collected in 2012 (Darwind5 12_19) have we finally become confident we have the torque and rpm generated in sufficient values to spin the 1.6 kilowatt generator we have chosen (Missouri Wind and Solar) efficiently, so you can save your money by generating your own electricity off-grid.
Our CFD runs below compare the power out in the bottom two frames between .5 and 1.5 negative Local Angle of Attack "LAoA" of the airfoil shape. The middle run was significantly better using the same airfoil shape (which took 10 3 hour runs to select between either a low moment or semi laminar flow airfoil design pair, we went with slower semi-laminar flow and lower tip speeds to increase bearing life). The top frame shows how the wake settles to produce 1.37 kiloWatts of mechanical power, which is why the 18_36 GYROWIND power generator is rated at 1.2 kiloWatts NP "Name Plate" at the rated wind speed of 11m/sec at 15m tower height. :)
Figuring out our Power Target for the GYROWIND 1836: A bit of Math and Estimation Work.
Given the Genset we have selected has been benched tested (Red Deer College, Alberta, Canada) to generate at 1000W at about 1100 rpm, we set the drive ratio at 2.8:1 as our simulations in Qblade DMS and LLT+Wake Method produced mechincal power above 1.5 kilowatts mechanical power at 11m/s, adjusting 10% below 1.5kW gives us 1.35Kilowatts at about 400 rpm of the rotor at 11 m/s. In reality Wind is anything but straight at 15m height at 11m/s, it twists and turns, gusts and lulls, changes direction relative to the attacking blade all the time, so it unlikely we will ever get close to 1.35 Kilowatts, so we reduce the estimate again by 10% (Wind roughness expected at most sites at this speed) and voila we have a 1.2kW NP "Name plate" power rating for the 18_36 GYROWIND Power Generator in actual use we can trust, given we also have measured mechanical field test data from the earlier 2/3 smaller DARWIND5 Model 12_19 prototype we operated on five separate field occasions producing approximately 600W mechanical power at 9m/s at 3.5m field height in the middle of Sod Field, somewhere in Eastern Ontario, Canada, measured with a stick mount marine anemometer from Kaindl, the Windmaster 2, (Made in Rohrbach a. .d Ilm, Germany, circa 1996, and yes it still works great. ;) ) You can see me holding the stick back in June 2012 in this short video here (Darwind5 Model 12_19 Prototype)
GYROWIND 1836 1.2kW NP QBlade CFD runs (Mechanical Power only)
The GYROWIND 18_36 ( 1.8m working diameter and 3.6m height of 6ft w * 12ft h) co-efficient of power "Cp" is a decent .31, which is REALLY great for a micro wind turbine, compared to BIG wind systems which because of their huge sweep areas and routinely come in @ .42 Cp, (don't believe anyone saying .47, it just doesn't happen in real wind farms, because Wind is rarely as straight as the tests you find in wind tunnel simulations.)
We expect the mechanical power losses to be about 10% maximum mechanical power or 130 watts due to Strut, cowling, driveshaft drag and driven wheel slip. GYROWIND 18_36 transmission is designed to slip via genset driven wheel spring load pressure against the raceway (2.8:1 drive ratio) in order to survive big wind gusts and not break the transmission system or the strut to blade attachment points). So as a result of these predicted losses At 11/ms rated wind speed, the GYROWIND 18_36 is conservatively rated at 1.2lkilowatts NP as measured on a 15m tall tower or pole in a Weibull 7m/s annual avg wind regime. In an AWEA 5.5m/s wind regime (which quite frankly is not a good siting of any turbine) expect significantly less power out put in the range of 200-400 Watts depending on how frequently gusty the site is, at the same 15m pole mount height, which also needs to be above the surrounding canopy or rooftops no nearer than 50m, and better if they are 100m away.
Most importantly the GYROWIND 18_36 power curve is broad and relatively flat operating at a Tip speed of between 2.8 and 3.1 while delivering a Cp "Coefficient of Power" above .41 as measured by DMS "Double Multi Stream" Solver designed for VAWTs. (Paraschiviou, Montreal, Canada-Qblade 0.95 Linux ) and a Cp over 3.1 when using LTT "Lift Line Theory" plus wake Wake Method Solver(TU Berlin, Computational Fluid Dynamics Center- Qblade 0.95 Linux ) as the blades rotate through their optimum lift phases between -10 and +10 degrees realtive to the flow of the wind. See the charts below to see how the different solvers vary for the 18_36.
nb- Collectively these CFD solver simulation runs (DMS being the least computationally intensive and time consuming and LLT+Wake Method the most computationally intesive and time consuming) together give a good approximation of predicted performance of the GYROWIND 18_36. DMS is more accurate in low wind speeds 3m/s to 8m/s where as LLT+Wake originally developed in the 1930s for Aircraft airfoils is better in higher RE Reynolds Numbers ( RE is an arbitrary factor composed of a combination of rotor blade surface area, air pressure and wind speeds used by the solvers). Since the 18_36 does not have much blade surface area given its relative small size in comparison to an aircraft wing of a small plane, but never the les, is rotating quite quickly (about 350-400rpm depending on which solver simulation you favour) at the higher speed of 11m/s per the simulation runs below of the blade and turbine (5 working blades), I trust LLT+Wake more at this speed slightly more because it is a complete turbine simulation (without the struts, cowling and driveshaft) than I trust DMS, hence GYROWIND 18_36's lower power rating of 1.2kW NP "Nameplate" power output rating at 11m/s on a 15m pole without flow obstruction and disruption, which is really keyed off a 1.37kW mechanical number I have derived biased more to the lower LLT number, then 10% loss factor experiences due to strut and rotor cowling and drive shaft cover drag, and expected driven wheel transmission slip against the raceway)
Above is a Qblade screen shot of the Gyrowind 18_36 DMS predicted Power Curve -top left expressed as Cp "Coefficient of Power" across various TSR "Tip Speed Ratios" The speed of the rotor at the working equator (widest point) versus the incoming wind speed. The Blue dot shows 2.8 which means the rotor blade at the mid point is travelling 2.8 times faster than the incoming wind speed, and is generating a co-efficient of power "Cp" which is .4 of a possible .626 of the 18_36 Darrieus Eggbeater VAWT design we employ. This means the design is extracting in this Tip Speed Ratio "TSR" .4/.626 = 63.8977 % of the available kinetic energy out of the wind flow operating at 11m/s which was the speed at which the simulation was run. This is quite good for a micro turbine with such low Reynolds Numbers at this speed, under RE 200,000.
The screenshot of Qblade above shows the DMS simulation predicting the power output at the red dot in the top left panel at about 1600Watts for 11m/s wind speed. Interestingly the torque ripple at this speed is also shown at different points in rotation 0 to 360 degree which shows the GYROWIND 18_36 turbine with some torque ripple, which does place strain on strut junction box and top and bottom cowling tip connectors of the rotor blade component as the turbine "pumps or rows" through the flow at what is 11m/s second, which is a healthy Strong below above a site normal average speed (7m/s) which in weather report terms is 24 mph or 39.6 km/h at the 15m mount height. Since DMS is known to be less accurate at higher speeds with low RE numbers versus actual recorded field results, again we bias the performance power output rating at 11m/s for the GYROWIND 18_36 80% toward to LLT+Wake Method Solver lower number of 1.31KW as represent in the earlier Qblade screen shot of LLT+Wake simulation in action, then we subtract what we think will be typical losses at the 11m/s speed, 10% of power output, due to drag in the parts of the design and driven wheel slip engineered into the design to protect the 18_36 from violent micro burst storm driven gusts, where acceleration of the flow can be very extreme in a short period, and has been known to bend many a micro turbine rotor blade in the past.
Creating the GYROWIND 18_36 power generator for a system cost of only $2.30/Watt means anyone can erect a GYROWIND generator or a 15m pole in a good site (we help you with that for free) and make the system pay for itself in 3-5 years depending on how good your wind is, without a tax payer subsidy (Grant or credit from the federal or state government). This assumes your tower cost is $1.15/Watt or 50% of the cost of the GYROWIND generator. If you must be sited higher to get over local tree canopies or building tops, expect that price to go higher for the tower.
Ok the price is US $:
When we ship in the early winter of 2020 will be at the 2019 fall advertised price of US $2995.00 with 10 year warranty. We are actively seeking wholesale partners around the world to sell to installer/integrator re-sellers, provided they will accept a shipment of at least 20 systems to get started. (1 10 ft shipping container). More inquiry info will follow in August 2019.
If you have wind at the site on average below 5.5M/s ( which weirdly is the AWEA standard as influenced by Bergey) , don't bother, you really need to have an annual average 7m/s to make any Wind turbine in the micro class work, regardless of the height. So pick your site well, otherwise load up with more solar panels, the buddy of wind power generators.
Applications? Power Essentials + WIFI and even mobile mining of Crypto OFF GRID ?: Home, Cottage, Small Business.
Our GYROWIND 18_36 power generator is designed to charge batteries, from which you draw your power to power up your cottage, part of your house , oe your business and or send the excess to the grid to earn additional cash (if they will allow you -ie like the look of your face, and have any spare capacity on the local distribution line to let you attach, for a fee of course) 12, 24 or 48V even 72V it doesn't much matter, as GYROWIND produces native wild AC, and its your choice of bridge rectifier which converts to DC to feed the controller and battery charge system you want to use to power up off grid, and or sell excess power to the grid.
One power need people might want to consider critical to power are their fridge, freezer and stove appliances and a few 10 Amp AC power plugs to run emergency lighting and run micro furnaces in the Northern Climates when the power does go out.
GYROWIND is sized right to work on its own with whatever depth of battery bank you need for home, cottage and small business applications and will never exceed 2KW power input into your controller. That said you can always add or go with a large 7kW to 10kW input controller to add 5 kW to 8 kW of solar panels to work in tandem with your GYROWIND power generator to charge up your batteries and get off grid, forever. With such a setup its easy to take most if not all homes of any size off grid and most small businesses and get it to pay back in 3 to 5 years. NICE. No more power bills. (and plenty of power to spare for running mobile phone crypto mining (Pi Network, Electroneum, etc.) connected via your WIMAX WISP provider in the country.
WARRANTY AND RETURNS:
GYROWIND comes with a 10 year warranty on all parts as shipped, configured for normal operation with in our site advice. The Warranty is 90 days for initial production flaws of parts, simply take a photo, send them to our site RMA "Return Merchandise Authorisation email (soon to be released in August 2019), get our ok, then mail us back the part (slow boat lowest cost, your cost) and our own suppliers will send you a new part right away, once we receive your shipping confirmation, to the address you specify at our cost, with 1 week delivery the estimated ETA for the replacement or spare part. Pay us th expedited extra cost above normal replacement shipping cost and we will get that part to you in 24-48 hours in the US, and 48 hours in Canada. Everywhere else is one week, as we ship parts from either the USA or Canada via our partners, depending o the part. That said we have designed GYROWIND power generator in the 18_36 form to have a useful operational life of at least 20 years. If you pay attention to blade condition and patch up fix, or repaint as prescribed you might get longer, depending on whether or not you live in a desert.
We have options for Desert and Winter operation at additional cost, at time of shipment, to improve durability in those conditions with special more expensive (and harder coatings, think diamond paint coatings found on vehicles today and additional filters, and the for the winter types auxiliary de-icer kits using small batteries and an interior genset housing blanket to thermally control housing temperature, and also heat airflow to the blade interiors to de-ice the blades continually, expect your power output to drop ever so slightly, as the generator powers the aux. battery doing this work.)
A Few GYROWIND 1*_36 1.2KKW NP physical specs and assembly facts in Review: getting GYROWIND Installed on the Ground properly.
GYROWIND is 12ft tall and 6ft in working diameter, weighs 50 lbs on the end of tower, so can be hand winched with the G/N Gravity Neutral Pole with Foot and tension cable for the foot, or be erected on a 15ft monopole from Ambor Structures of Minnesota using their handy Vertical G/N Pole mounted on a tilt base. Whatever your choice, there are lots of mount options out there. Just forget the concrete, not needed these days as screw piles work best in most cases to create a sturdy foundation and are done in a day. The whole system fits in a 4ft long box 18" * 18* so a pickup sized job, one person can handle (even tipping the 18_36 GYROWIND box up and into the bed is easy for the slightest person.) Once the GYROWIND is placed 15m from the base of your tower, it takes about 1 hour to properly assemble the system at a leisurely pace first time. My design goal is 15 minutes for the experienced installer or DIYer, so they can spend more time on the assembling the tower, mounting the rotor and routing cables (maybe even trenching a ditch to lay cable to the house, cottage or business), and setting up the electrical systems (usually set up inside the house, cottage or business. Ambor also offers a Quickbase solutions which simply lets you load up the base with sand bags, and can work as a roof mount system with a tilt base.
Why the GYROWIND name?
Simple. GYROWIND has three flywheels, one each top and bottom and one bigger flywheel in the middle joining the 1/2 blades together to create the classic Eggbeater shape. The weight and location of these flywheels form a gyroscope effect in the wind flow, which is light enough to keep the rotor responsive in light and medium gusty wind regimes, yet heavy enough to preserve mechanical rotational power for a short period to ride out short lulls in flow in such semi-turbulent gusty flows to keep powering the spring loaded generator driven wheel pressing against the inside wall of the lower flywheel, found rotating inside the round generator set housing.
A word about Self-Regulation: Protect your generator set and expensive (relative) control and battery charge electronics.
Darrieus Eggbeaters in the past 2 and 3 blade shapes have been known to over-speed out of control and fry electronics as well as burnout mechanical and or electrical resistive braking systems. Bad, real Bad. While the five blade designs are not as Cp efficent as there 2 and 3 blade brethren in this class, they have one significant advantage the effective solidity of the 5 blade GYROWIND design gradually shuts off flow through the rotor top and bottom to finally converge just above and below the equators to choke off most of the flow in high, storm or even hurricane winds, capping the maximum effective rpm of the rotor, which makes it easy to employ low cost mechanic and/or electric resistive braking which will last way beyond the warranty period. NICE.
Who did the design of the GYROWIND 18_16 1.2KW NP power generator and where and when can I get one? Can I pay with Crypto?
I did the design, as derivative works I have licensed previously through my company Harvistor llc to Mobismart.ca and also V3wind.com, neither of which have yet to be released into production (but soon to show up, likely in 2020 for both in volume). My full time job is as a technical consultant. GYROWIND will emerge shortly as a Self service online store with full service and support delivered by our vendor partners, and in some cases our re-seller partners. We will be showing GYROWIND in the fall of 2019 via online videos, operating somewhere in Canada, and about then we will start taking 18_36 orders for delivery in the early winter of 2020.
We have also decided to a lot about 50% of the orders to be in crypto valued in US $ for now, accepting Bitcoin, and Bitcoin convertible stable coins, like DAI on the Publish.ox site where this blog first appeared. :) Stay tuned, as we figure out that stuff a bit later this summer of 2019. We will likely produce the first 100 to be shipped in the first 1/2 of 2020, and make 50 of them order-able via crypto payment in Bitcoin or a stable coin we like.
Which battery system and charge controller should you use?
We are finalising our recommended battery specifications, configuration advice and co-marketing partners now, and will release that information in late July or early August, so check back here to find out more.
We will include DIY controller and bridge rectifier options from Missouri Wind and Solar as well as other vendors who are well known in the micro wind industry and shipping with other wind turbines in this category.
TK over and out