nvention Name Reciprocating Axis piston pump (PCT / EG 2022 / 000018 Reciprocating Axis piston pump the purpose of the pump is reduce torque upto 50% over conventional axis piston pump the same (size / rev) and at the same pressure value. - Unique in the invention / the method of pusine the pump piston. In the case of the usual pumps concept the piston are connected rotating shafts installed inside bearings it rotates about axis such as crankshaft and drive shaft in axial piston pumps. When the piston is driven by a reciprocating axis We get two displacements of the piston The mechanical displacement results from the linear movement of the reciprocating axis The second displacement results from the angular movement of the reciprocating axis We take advantage of this invention to increase the energy density of hydraulic accumulators For the purpose of storing solar or wind energy and making the renewable energy system stable in energy supply . Currently, the hydraulic accumulator system can be designed with a volume of 10,000 liters. The total energy stored in this volume is at a pressure of 150 bar.Only 41 kilowatts. Of course, the hydraulic accumulator system will fail to store energy . But what would happen if we added the pump subject of the invention to a hydraulic accumulator system with a volume of 10,000 liters? torque to output size/rev=2586cm3 At a pressure of 250 bar Reciprocating Axis piston pump 5350 N.m At 90% mechanical efficiency. * Torque for an axial piston pump of the same size/Rev 2586Cm3 10293N.m Without taking mechanical efficiency into account. *The important question is the size of the hydraulic motor needed to drive it Reciprocating Axis piston pump If we consider the mechanical efficiency of the hydraulic motor to be 90% size/rev For hydraulic motor 1493Cm3 *If the volumetric efficiency of Reciprocating Axis piston pump 81% Net volume coming out of the pump per cycle is 2090 CM3 *If the volumetric efficiency of the hydraulic motor is 95% It is the volume coming out of the hydraulic accumulator to operate the hydraulic motor to drive the pump 1570 Cm3 size/rev The increase in the size of the hydraulic accumulator per roll will be 520CM3 At a pressure of 250 bar *If we add five pumps and five hydraulic motors to a hydraulic accumulator system with a volume of 10,000 liters The increase will be in the size of the hydraulic accumulator per roll 2600 CM3 For one revolution of hydraulic pumps and motors. The power output from the hydraulic accumulator is at a pressure of 250 bar and an efficiency of 80%.220Kw/hr .Within 20 hours, the total power output will be 4400 kilowatts. At 250 RPM Hydraulic pump and motor *The total cost per kilo is $80/Kw This is less than batteries In addition, this system reduces the cost of solar energy construction facilities by 75%.Produces wind turbines 2.5MW/hr The average daily energy production will be 17 megawatts At a cost of more than $3 million While we can produce the same energy from the hydraulic accumulator system At a cost 1360000 dollar . The importance of the invention for the energy storage market . Make a mesh Make electricity production from wind and solar energy stable And at low cost