Renewables-2017

Liquid fuel for sustainability - corrected Author: David Judbarovski, systems engineering, principle inventor, retired judbarovski@gmail.com Abstract I declare and here prove by clear way, that countries even suffered by lack solar energy and snow winters & no free areas & no fossil fuel deposits, they can produce themselves and by themselves oil of refine quality from “air and water” in the full demand, by about USD 0.20/liter (USD 0.75/gallon) as domestic price, and to turn own energy system for distribute electricity supply as main energy source by about USD 0.005/kWh. Note: It is an example of circular economics, including CO2 being greenhouse gas exhaust, it is used in carbon cycle. The said oil can be synthetized on artificial floating islands distributed in open ocean (USD 60.0/ton/m2 of dry surface area) industrially either by known Fischer-Tropsch or by its variations from CO2 (by USD 10.0/ton, 320 ton/year/m2 desalinated water surface area) extrac...

Take-off and landing device   Author: David Judbarovski, sysiems engineering, principle inventor, retired judbarovski@gmail.com The four movers are placed at the ends of a cross, fixed to a vehicle. It is a take-off and landing device  Each mover is a container with a water pump. Its inlet pipe is short and wide, and its exhaust pipe is short and thin and used as a nozzle creating a lift force, while the water fall is collected in small amount on the bottom and used as the pump intake. The water collecting and used in the cycle, it halves the lift force created by energy consumed by the pump.  Total 40 kW, 8.0 atm. pumps per a ton, can keep the weight at designed altitude It can be quickly modeled and simply scaled Really, Q = F / v ; v^2 = 2 * g * 10 * P; S = Q/ v/ 1000 (m2) = 10 * Q/ v (cm2); F1 = 10 * p * S Q (kg/s) – jet exhaust F (Newton) – lift force v (m/s) – water stream through the jet’s nozzle. P (atm) – the pump pressure g...

Vertical take-off and Landing (VTOL) vehicle Author: David Judbarovski, systems engineer, principle inventor judbarovski@gmail.com A VIP car can fly up to 900 km/h, It uses a special invented VTOL device (see https://judbarovski.blogspot.com/2020/07 , July 20, 2020) coupled with a mono-wing of a short wingspan, allows running and even lift and land on city streets, if permitted. It can be quickly modeled and simply scaled.                For comparison, any ordinary approach..need special terminals and costly treatment.