Tag Archives: turbine

Green Turbine presents 15 kW turbine model at Dutch Installation Trade Fair!

Date: 10 – 12th September, 2013

Stand: AITEC hall 2, stand 204,

Trade Fair website: Evenementenhal Hardenberg

We will be showcasing our 15 kW turbine model at the stand of AITEC, a specialist in heating equipment. In turn, AITEC the dealer of Magnabosco steam boilers, will be presenting the GVR 300 model steam generator.

Our 15 kW turbine is expected to be market ready by Q4 of 2013. With this turbine it will be possible to modulate and vary the output. Each nozzle is 2.5 kW. You can also range the pressure between 1 and 10 bar abs.

You are more than welcome to come and visit us at the fair!

Both Gas- and Steam to power EV battery range?

Nick Kurczewski is writing about extremely small (gas) turbines, which can extend the travel range of electric cars in his blog on the website of Green Car Advisor. He’s talking about the Dutch company MTT en the Israeli Company EVT Motors, but he forgets to mention Green Turbine BV. Although Green Turbine is mostly suitable for hybrid cars (the turbine can use the waste heat of the motor), it also can be used in electric cars with a gas turbine, because waste heat of a gas turbine can be used to drive Green Turbine.

So, what exactly is the Green Turbine?  Well, it’s a small (slightly larger than a football), lightweight and silent micro steamturbine with an output in the range of 1-15 Kw. It converts steam to electricity and also produces heat in this process. It can be driven by any fuell type (natural gas, propane etc.), waste heat, biomass and fuel cell.

Green Turbine
Green Turbine

The turbine has been developed in the past five years by a small company called Green Turbine BV (it has also a Canadian version which is the company Green Turbine INC. info@greenturbine.net

Green Turbine is not developing a prototype, it actually has a working prototype. The only thing left, is the long term testing which is starting at the end of October.

Green Turbine can extend the efficiency of hybrid cars by 20-30%. As previously mentioned, it captures the waste heat of the engine exhaust and converts it into electricity. We calculated this percentage based on the following:

In hybrid or fuel cell cars about 10% of the waste heat can be recovered and converted to electricity. As waste heat is about 75% of the total energy input of a car, this 10% is substantial. It will boost total efficiency of a hybrid automobile between 20 – 40%.

Imagine what Green Turbine could do in an electric car, when it is placed after a gas turbine!



Cyclone successor of ICE?

Cyclone Power Technologies   has invented an external combustion engine with  the  same potentials  as the conventional Internal Combustion Engine (ICE).  The Cyclone, named after its inventor Harry Schoell, Chairman and CEO of Cyclone (Florida),  is a heat regenerative external combustion engine  creating mechanical energy by heating and cooling water in a closed-loop,  piston-based engine system.

Looking  like a modern day steam engine,  the Cyclone could be an excellent replacer for the ICE.  Our  conventional  piston engines  have been doing service  us for years in economies and societies.  It is  pumping water, propelling  boats and ships, digging holes,  generating electricity and driving cars.  It can be used  for many task, from mowing grass to delivering  mail.  In short, we can’t live without them.

The Cyclone can be built in any size and  can apply  for many purposes. It also runs on petroleum fuels and unfortunately  that  is a disadvantage.  For  it also contributes to the detoriating of  a global environment.   So a new type of engine would be developped that is more readily to alternative fuels. Fortunately external combustion is more leisurely. The flame or explosion burns intself out completely while still working to make the engine run and giving less pollution.

Some companies already have been applicated for a  licensing agreement  for production of the Cyclone.  It can be applied for many purposes ; to burn waste oil or to put waste heat to work, to use for solar thermal applications or in a military robot (EATR project) And maybe it could be applied for cars. We have electric cars and plug-in hybrids driving  around,  so why not  a car with an external combustion engine  or micro steam turbine under the hood ?

With  the Cyclone we are a step further in the technology  to decrease the global emissions.  Steam turbo generators  and micro CHP are new potentials out there waiting  to happen.  There is also a  micro steam turbine  1-15 kWh coming on  the market with a lot of potential.

See:   www.greenturbine.eu



WindPipe a gamechanger?

Inventor John R. Tuttle  has developped a new kind of wind energy  converter which might be a good replacer of wind turbine generators. This prototype WindPipe  is quite a bit different from the turbine generators as we know them. It has no rotating parts at all, no long churning blades or propeller and no rotating power generator hidden in a nacelle.

Vertically the  WindPipe  looking more like a crude musical instrument  with a horn-like wind capture head at one end. Because it has no spinning  blades, it  can be integrated into buildings design. It can lie on its side or lie at any angle  or in any other shape.  ‘ The windPipe can be used not only in traditional wind farm tower arrays but inside buildings and even underground with air ducted in from the winds above’  says  inventor John R. Tuttle . ‘ ‘ Windcaptures does not have have to be circularly shaped as with spinning propeller blades, capture  can be rectangular  or any other shape with the air then ducted to the energy converter system for direct energy conversion electricity.’

WindPipes  can be spaced close togheter because  there are no whirling blades.

There is no cut out wind speed. Power output in the WindPipe starts building at about 7 miles per hour of wind speed and climbs from there.  ‘Unless the WindPipe gets destroyed in a bad storm!  Vertical towers are light and easily raised up to 120 feet with a crane. All the electrical components and connections are at the bottom keeping maintenance  costs low. Also the cost of power  from the WindPipe are low. Above 14 mph, the technology is expected to produce energy from 3 to 10 times cheaper than turbines, from $3.30 per MWh to $ 0.3 per MWh, compared to the $10 per MWh of modern turbine wind towers.

It’s sounda bit  incredible but it works. But Tuttle won’t say how it’s work. So pity the inventor who wants to develop the idea into a commercial product. For getting investors interested, you have to disclose at least the principles of your invention.  He has to sign a Non Disclosure Agreement (NDA) but it is not easy to find a truly interested investor  without a tidbit of information to chew on opfront.

Tuttle is master of inventions and patenting. He  is the world leading patentholder (at least 78 patents). He plans to build a 9 meter (30 foot) tall unit that can be expected to produce 900 watts of power in a 22 miles per hour breeze.  The unit could put out as much as 9 kilowatts at a stormy 44 miles  per hour. The prototype should also be prettier in white fiberglass and be more streamlined. The wind capture end will be about 3 meters, almost 10 feet in diameter.

If the WindPipe is really a breakthrough we don’t know yet. Tuttle has  to prove it. Any way there are more  inventions out there waiting to happen.


Velozzi launches micro turbine car

The new Velozzi Solo might be  a benefit for  the development of the electric car.  The crossover plug-in hybrid, manufactured bij American Velozzi,  has  an on-board micro turbine battery charger and the ability to run on almost all fuels including petrol, diesel, ethanol, brutanol, biodiesel and natural gas.  It is also  the first production car in the world that  uses a multi fuel micro turbine battery charger to recharge its lithium ion batteries.

From the start Velozzi had  in mind to build a car with its own eco-plant and it took  carbonfibre bodywork to keep its weight to a minimum while,  at the other hand wanted ‘ to create a most exquisite interior to match the exterior styling of the Solo’  according to a Velozzi statement.

‘It ‘s hard work to manufacture efficient vehicles which have antiquated types of construction, ‘ says  CEO Roberto Velozzi. ‘ Because  in fact  it  is inconceivable and counter productive. To make an efficient environmentally friendly vehicle, you need  to utilize lightweight materials to improve mpg, reduce pollution and increase safety’ .

The Solo has full speed capabilities. It should be capable of reaching 0-60 mph in less than six seconds and it should do more than 120 mpg and reaching 130 mph.

In 2007 Velozzi launched its sports car with similar technology and  hopes to have both cars in mass production by 2012.


New geothermal heat recovery method

Bron: National renewable energy laboratory
Example of geothermal heat: Hot springs in Nevada. Source: National renewable energy laboratory

Pacific Northwest National Lab has been making progress in using a new method for capturing more heat from the low-temperature of
geothermal resources. Which it is hoped could result in generating  pollution-free electrical energy. A new liquid is used called biphasic fluid, which has the benefit of rapid expansion and contraction capabillities developed by PNNL’s conversion system. The  thermal-cycling  of the biphasic fluid, when exposed to heat and brought to the surface from water circulating in moderately hot, underground rock,  will power a turbine generating electricity.

Scientists added metal-organic heat carriers (MOHC’s)  to aid efficiency, which boost the power generation capacity to near that of a convential steam cycle.
‘Our intention is to enable generation from low-temperature geothermal resources to get a clean energy source without  any greenhouse gas emissions  which is  also a steady and dependable source of power’ said Pete McGrail, PNNL Laboratory. ‘ We accidentily discovered this by research on nanometerials used to capture dioxide from burning fossils fuel’ .

PNNL  plan  to have a functioning  bench-top prototype generating electricity by the end of the year.


The case for steam

Say: “Micro turbine” and people think of jet engines. And how small is micro anyhow? The smallest micro turbines (gas turbines that is) are still at least 30 kW: enough for a good sized apartment building.  http://www.capstoneturbine.com/
Making smaller gas turbines is hard to do, engineers face extreme stresses and temperatures in rotors and bearings. The laws of fluid dynamics can not always be scaled down easily.
So, a real micro turbine in the range of 1-5kW having a long working life, a good efficiency and burning all types of fuel is still a promise.
But if we want a decentralized power system, where every household can make its own power, that is exactly what we need.

More than a century ago, Mr. De Laval, a genial Swedish engineer, invented a small steam turbine. To be more precise: he invented THE steam turbine (although Mr. Parsons deserves some credit here too)
For some mysterious reasons, soon afterwards all research efforts were focused on developing large and even huge steam turbines. Mainly because very big steam engines of the reciprocating type were hard to manufacture and unsuited for driving generators. Because now we had a second industrial revolution at hand: electricity!

What happened in the past century was that enormous amounts of money and effort were spent on the development of gas engines (the automobile industry), gas turbines (jet engines, the aircraft industry) and very little in developing steam turbines. There are a handful of manufacturers of steam turbines in this world. They all build large and very large machines. A company like Elliott promotes small steam turbines: from 500kW upwards!

If I am not mistaken, this state of affairs is likely to end. After 5 years of research a company called “Green Turbine” has developed a micro steam turbine in the range of 1-15 kW. Their 1 kW and 2,5 kW versions are working prototypes and will be rigorously tested.  www.microturbine.eu

The Green Turbine is not only a turbine, but a compact, completely sealed turbo generator. The turbine runs with 30.000 rpm and on account of this high speed is very compact and only 7 kg in weight.
The novel design (patented) and modern materials like plastics gives Green Turbines excellent specifications. The efficiency seems to be as good as steam turbines of a much higher output.
The design is aimed at low production costs. Compared with gas turbines the Green Turbine is almost silent.
A very important feature is the low temperature requirement of the steam; 200 C is enough. So waste heat is an obvious source of energy.

The field of application requires some “out of the box” thinking.

Where do we find a lot of waste heat: cars! Power a Green Turbine with the waste heat of a (hybrid) car and savings of 20% in fuel are easy to get.
How about yachts and small ships?

Micro CHP (Combined Heat and Power) is another obvious application. Better than a heavy Stirling engine or gas engine.

Solar energy? Yes, capture the heat, make steam and your turbine will run. Use the low temperature heat of the turbine to heat your house or swimming pool .

And, yes, also the waste heat of a fuel cell or micro gas turbine can drive Green Turbine.
We closed the circle!