Renewables-2017

Method of breakthrough improvement of solar thermal plants Author: David Judbarovski, judbarovski@gmail.com Linkedin.com Background Conventional solar thermal power plant can comprise a field of heliostats (i.e. large planar mirrors equipped by sophisticated tracing system being principle different each to others) and very high and expensive tower and a tank on its top. The said heliostats redirect solar beams on the said tank and heating the said tank content. Because solar irradiation being very variable, ordinary we need to store solar energy to release if in low irradiation and in sunless periods, and for such purpose a melted salt is used by special two tanks system.   The larger heliostat, the more expensive of each squire meter proportionally to its linear dimensions to resist wind loads and to own weight, but correspondingly the control system sufficiently to be simpler and cheaper. So about 100 m2 area of each heliostat with USD 100.0/m2 was as a compromise ...

How to break Carnot rule for heat engine? Author: David Judbarovski, judbarovski@gmail.com Linkedin Let consider a electrochemical cell producing electricity, and the said cell recycling by heat Being summarized: our Zn-battery with NH4OH –electrolyte produces 2.45 kWh/kg Zn + 1.22 kWh/kg Zn consuming H2 as a byproduct of the said Zn-battery, so totally it is about 3.7 kWh electricity. Then we recycle the said Zn(OH)2 and NH3 being two other products of the said electrochemistry in Zn and in NH4OH correspondingly, by consuming 2.15 kWh low temperature heat for dissolving the said NH3 in the water, and another 1.53 kWh heat of coal burning in the air for recycling Zn from Zn(OH)2, so totally the same about 3.7 kWh energy, but being the heat. Certainly, they are theoretical values, but being obvious way to break Carnot rule for heat engine: here we uses the heat to produce electricity with energy efficiency near 100% as ECG         Really, my bat...

Modified Leclanché cell’s power system Author: David Judbarovski, judbarovski@gmail.com Linkedin My present conceptual invention is a new look on power generation. Here just below I disclose such systems. It generates electricity by USD 0.01/kWh (CAPAX + OPEX), with CO2 exhaust of 0.23 kg/kWh vs. USD 0.09 and 1.0 kg CO2 for coal TPP, or USD 0.09 and 0.46 kg for NG TPP correspondingly, if USD 80.0/ton coal and if domestic USD 100.0/1000 m3 NG. Energy efficiency of electrochemistry was supposed as 70% and for TPP as 40%. The Leclanché cell is a battery invented and patented by the French engineer Georges Leclanché in 1866. I slightly modified his cell to turn the big problem of his ECG for the earliest age of electrochemistry into pretty advantage for our present level of technologies. Mr. Georges had developed a special technological trick being a usage of composite electrode containing manganese oxide for his Zn-battery to avoid its hydrogen being a byproduct of his ba...

Extremely quick & cheap transportation Author: David Judbarovski, judbarovski@gmail.com Linkedin.com It is not a ground effect vehicle, but much better. A key element of my ship is to add the thin water steam cocoon created by electric heating a hull of the ship. It flows slightly lower than sea level, and the ship’s nose is tilted and forcing the upstream water to be thrown upward in the air, forming a surface wave along both sides of the ship route. It is new kind of sea ship, breaking all stereotypes. If ship is L * B * H = 100 m * 10 m * 6 m = 6000 m3 = 6,000 ton displacement, the outer surface S = 2 * (6 +10)   * 100 = 3200 m2, steam cocoon is created by power of Wsc = 5000 W/(m2 * K) * 3200 m2 * 10 K = 160,000 kW, speed of v = 900 km/h = 250 m/s, t = ((6 m/ tan 15) = 22.4 m) / 250 = 0.09 sec, and Wp =  9.81 *  (6 m / 2) * (22.4 * 10 * 6 m3) /0.09 = 441,000 kW / 0.85 = 520,000 kW, here 0.85 is a mover efficiency, and totally W = 520,000 + 160,0...

New kind of public transport for suburb and province Author: David Judbarovski, judbarovski@gmail.com Linkedin.com New kind of public transport uses small land units (LU) being very simplified small cars can be electric vehicles, can be jointed in a sort of a train (TLU) as at a station, as on their traffic on main roads. Moreover, the said trains can be jointed in a super-trains (STLU), if being peak times, when a lot of passengers, while a gap between such super-trains is no more than if being for individual LU-s. The said transport can substitute railway transport because it can provide much better service, but needs a special way configuration, will be disclosed here too and can provide extremely high capacity with extremely cheap O & M vs. railway transportation, can be used for cargo trains only as a last monster of passing age. Really, my kind of public transportation can provide (1) A wait time at the station, is practically a zero        ...

Cheap and simple method to prevent traffic-jams on province roads Author: David Judbarovski, Israel, judbarovski@gmail.com See CV in Linkedin.com (David Judbarovski) My method was developed for Israel, but can be applied for other countries with analogous problems. Nevertheless, I’m sure that it is a problem of private cars ownership now can’t satisfy present and future progressive transportation paradigm. I have my own understanding of that problem and very economical decisions of it as for cities as for province, isn’t needed in province roads at all, and their costly managing Every working days, when a mass of cars owners go from their province settlements to cities and when go back to home, we can see terrible traffic-jams on the roads   destroying nerves and normal living of the said people. If being a problem of twice a day only, it is can’t be solved by traditional ways of grade separation, because its cost can contradict its very low capacity, while at gra...

Urgent problem of small vehicles on roads and its weakening  Author: David Judbarovski, systems engineering, principle inventor, retired Lincedin, https://judbarovski.blogspot.com, Facebook   I saw, that it would be an urgent problem, jet many years ago, when such means of transport were very exotic, and mainly being small cars.   The a madman only or a suicide try to travel with big velocity by small transport on the road, but now it turns in real epidemic being very dangerous for all on the roads including pedestrians.   Now any driver is sore suffering by that problem on the road, but municipality and police are starting to extinguish the fire at a tree no sooner than all forest is burning. Yes, it needs many bans and penalties, but not full ban, and I see here one problem only, and it is a small cars with their small velocity breaking high-speed movement for the others. The small cars can be for special places or/and for invalids only. For elec...