Renewables-2017

Fresh look on wind power generation Author: David Judbarovski, systems engineering, Israel, retired engineer judbarovski@gmail.com , Linkedin: David Judbarovski [3749]-25/06/2017, {149}-( 1 4)- 0 8. 07 .2017 Abstract   It is a new kind of a wind power generator. Its energy effectiveness can be close to 100%, while it has very simple design, and its electricity is about 0.3 USA cents per kWh, because a lion share of the said cost is a share of a geared electric generator. It works in open sea in principle, while global wind kinetic power is about 20.0 milliard kW. The power generation unit is a small pilotless boat with a flat sail. Four small floats placed symmetrically at a distance from the boat, are serving to compensate a torque force of the wind on the sail. A relatively small water wheel with three blades in a form of window leaf each (WWWL) is fixed underwater to the boat moved by the sail. At any moment only one window leaf is closed by the fron...

New kind of a wind power plant (WPP) Author: David Judbarovski, systems engineering, Israel, retired engineer judbarovski@gmail.com , Linkedin: David Judbarovski [3749]-25/06/2017, {149}-(13)-07.07.2017     Abstract   It is a new kind of a WPP invented by me. It is most energy effective than any other WPP     and has very simple design, and its electricity is about 0.3 USA cents per kWh!!! It works in open sea in principle, while global wind kinetic power is about 20.0 milliard kW. The power generation unit is a small pilotless boat with a big sail of canvas or plastic foil, and four small floats placed symmetrically at a distance from the said sail are serving to compensate a torque force of the wind on the sail, and a WTWB (water turbine with window leaf’ blades) fixed underwater to the boat, it produces electricity. A system of such boats is a wind power plant. For example, the sail of 20 meter width and 10 meter height serves to har...

Breakthrough transformer (pocket size Smartphone 6.7” into powerful Tablet 10.5” ) Author: David Judbarovski, systems engineering, Israel, retired engineer judbarovski@gmail.com , Linkedin: David Judbarovski [3748]-23/6/2017, {24}-24/6/2017   In folded state it is compact device (15 cm * 8 cm * 1.1 cm, 288 g or 600 g, if 2.2 cm thickness) consisting of a System unit (15 cm * 8 cm * 1.1 or 2.2 cm) with four narrow slots (7 cm * 0.15 cm each) in its upper side for moveable rigid consoles, and their tips serve to pull out end parts (7 cm each) of a flexible display on thin steel foil substrate in opposite directions from corresponding rolls (1.1 cm or 2.2 cm diameter correspondingly). The said four consoles tips are linked each to others by 8 cm long thin bars. By pulling the said bars in opposite directions we very quickly and conveniently can transform our fully functional Smartphone into the powerful Tablet can operate as long as iPad of last generati...

Mr. Oliver Fetzer, PhD CEO Synthetic Genomics, Inc. Mr.   Vijay Swarup, Vice President ExxonMobil Research and Engineering Company   Date: 22.6.2017   Dear gentlemen, I can suppose my technology invented in 2011 for small floating algae grow, to be helpful for your business. It allows the algae grow rate to be doubled/tripled. The water is circulating in channel has a form of a closed spiral   The flow velocity is controlled to keep the algae density at exponent phase of its grow rate by algae harvesting in the channel point   with upper end of the exponential phase and just after the said point the said density is corresponding the low end of the exponent. So the algae densities are constant (“frozen” ) at any point along the said channel, but at differ points at the said exponent. It can allow optimal and simple feeding the algae at constant points of the channel and algae grow control and the water cleaning continu...

Ship powered by sun PV-cells Author: David Judbarovski, systems engineering, Israel, retired engineer judbarovski@gmail.com , Linkedin: David Judbarovski A real ship of 165,000 ton tonnage with optimal power of 37.000 kW would need about 37,000 * (8000 /1600) / 0.2 ~= 1.0 million m2 PV-cells = 1000 m * 1000 m, can be towed by light foldable sectioned construction being unfolded in open sea and folded before entrance to a port. Now, such towed solar power plant is no more than 100.0 million USD, while the said ship total cost is 185 million USD. Certainly, we have to consider a costly power storage and three days = 72 hours storage can be quite enough, while I can recommend to use Li-H fuel cells can be as a power source for the ship. A total weight of the said fuel cells is negligible vs. the ship tonnage, while the fuel (Li and H2) of such Li-H fuel cells can be thermally recycled without any interrupting of its work by Joule heat of the said PV-cells’ electricity. ...

Sea transportation by solar energy is cheap, simple, convenient, and clean Author: David Judbarovski, systems engineering, Israel, retired engineer judbarovski@gmail.com , Linkedin: David Judbarovski [3743]-17/06/2017   Now PV-solar cells achieve the parity with fossil fuel by a cost of kWh of electricity, and tend to increase their advantage, while PV-roof is very simple in its installation and reliable and light device and electric motors are very attractive in design and for digital control, especially if rough sea or battle. Certainly, the cost includes electricity storage.      So solar ships can substitute conventional ships can be cheaply modernized into solar ships, while the PV-roof simultaneously can serve as an excellent cover, but sectioned one for firmness.

Economics evaluation of the water splitting while space traveling Author: David Judbarovski, systems engineering, retired engineer, Israel judbarovski@gmail.com , Linkedin: David Judbarovski My idea goes back to 13.06.2015 [1] and more detailed disclosed on 4.12.2016 and later.   Here I will show my technology and its economics evaluation on example of world record heaviest rocket of Falcon Heavy can launch more than 15% heavier payload with a help of my technology.   A core of the idea is the water splitting can start since LEO (Low Earth Orbit) and producing the oxygen and the hydrogen being much more powerful fuel than kerosene based ones, but the electrolyser is a very heavy device per kW power. Instead it we can use thermal water splitting by concentrated rays of a lot of LED-s or microwave generators, powered by PV-cells on substrate being a very thin film can be unrolled on the orbit, and oriented to the sun by two servomotors fed by a tiny sha...