Renewables-2017

Solar thermo-electric generator for electricity production cheaper USD 0.01 /kWh October 23, 2025 David Jdbarovski, systems engineering, principle inventor, 85, retired, Israel. judbarovski.blogspot.com, judbarovski@gmail.com. CV-2023, davidjud.blogspot.com/2023/04, posted on April 27, 2023. Abstract. Solar thermo-electric generator of about 1 m2 solar flux comprise a tiny antenna after solar energy heating upto 1200 C in focal spot by (b) a dish concentrator and (c) a solar tracker comprise a thin film planar mirror moved by two tiny and cheap servomotors controlled by simplest sensor, the said all are motionless, except of the said tracker. It was estimated roughly and shortly whithout serious optimisation as more than 45% efficiency of solar into electricity, while a cost of the energy system seriously depended on regions' implementation, but for moderate climate it is about USD 30-50 / kW.

September 19, 2025 Breakthrough cheap and zero-carbon hydrogen production can change a game in chemistry and energetics. David judbarovski, systems engineering, principle inventor, retired. judbarovski.blogspot.com, judbarovski@gmail.com. (a) CO2 [1] + H2 = CO + H20 + 41 kJ, endothermic. Such reaction is known (1780 yr., rewersible WGSR - Water-gas shift reaction) and circular here, so it is for free. (b) The novelty is thermochemistry being (CO + H20) + 0.5 H2O = O.5 * (H2 +0.5 O2) + (CO2 + H2) + (- 41 + 242/2) = 80 kJ - USD 88 / ton H2. [2], [3]. dG = 80 kJ + 65 * T, so it needs catalysts, can be the iron, and additional heating. References. [1] CO2 mass production from the air very cheaply, judbarovski.blogspot.com/2025/01, posted on 12 January, 2025 [2] Breakthrough cheap Re energy, davidjud.blogspot.com/2024/06, posted on 21 June, 2024. [3] Solar and Wind as cheap as 0.4 cent / kWh judbarovski.blogspot.com/2025/02, posted 11 February, 2025. [4] CV-2023, davidjud.blogspo...

A compact and hazard-free method for ammonia-based hydrogen storage and transport enabling realistic hydrogen economics David Judbarovski Independent researcher, Systems Engineering, Principal Inventor Email: judbarovski@gmail.com Blog: judbarovski.blogspot.com --- Abstract Safe, scalable, and low-cost hydrogen storage remains a major obstacle in achieving a global hydrogen economy. Here we present a simple and compact approach based on dissolving ammonia (NH₃) in water at mild conditions (10 °C, 1 atm), achieving up to 900 g NH₃ per kg of H₂O, equivalent to roughly 1,000 L of gaseous NH₃ per liter of solution. This method allows three orders of magnitude higher volumetric efficiency compared with conventional gaseous or cryogenic hydrogen storage, while significantly reducing hazards associated with ammonia leakage or high-pressure systems. The system integrates naturally with renewable hydrogen and ammonia synthesis pathways, enabling a continuous and flexible conversion between ammo...

Extremely compact and hazard free way to store, and delivery, and usage of NH3, opening a door for realistic hydrogen economics. David Judbarovski, systems engineering, principle inventor, 85, retired. judbarovski.blogspot.com, judbarovski@gmail.com Abstract. NH3 of USD 50 /ton, see [1], is produced from the air and water and from the cheapened hydrogen of USD 90 /ton, Opex, see [1a], with a help of my supercheap renewable energy conceptions, see [2], [2a], such NH3 being dissolved at 10 Cantigrade in the water 900 g / kg water, it is about 1000 liter / liter such solution, hence it allows to transport and to store a huge amounts of NH3 at mild conditiins and a three order of magnitude more compact and cheaper than any others conventional alternatives. References. [1] Incredibly cheap and zero-carbon NH3 production, judbarovski.blogspot.com/2025/09, posted on Sept. 21, 2025. [1a] Zero-carbon and cheap hydrogen production, changing a game, judbarovski.blogspot.com/2025/10, p...