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RVCR - a gamechanger innovation in 'Mechanisms of Energy Conversion'

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RVCR Wind Motor Project


The RVCR Wind Motor device was 1 st conceived mid-way during the RVCR Preliminary Engine Prototype Development project is an off shoot of the base RVCR Technology. The configuration of the system was modeled in a virtual engineering software and a patent application for the system was filed in 2013. The Resource restriction and other engagements did not permit any fast-paced development in the project. In 2017 GYATK revived it’s wind motor plan and developed an understanding with network of partnering firms in India and in UAE for its Value chain requirements of this project vertical. The RVCR WMPG Project report has the details of the project and the business case. Project report

RVCR -WPG synopsis

The RVCR is an entirely new Principal in Prime-Mover Drive Mechanism that that enable multi-fold increase in energy capture efficiency compared to modern wind turbines. The RVCR principal simplifies the mechanics of Prime-Mover to reduce the Capital Cost drastically and the engineering involved reduces operations cost.

The Conventional wind turbines are driven by lift, achieved by aero foil profile of turbine blades. The axial flow wind turbines are rotary machines converting the Kinetic Energy of Wind into Power. RVCR is a rotary positive displacement mechanism that uses pressure differential between high wind velocity zone and ground level stagnant air conditions.

Unique capabilities



Departure from Convention

  • Power Unit Installation on Ground.
  • No Open rotating blades.
  • Quieter operation, No Bird hazards.
  • Gyroscopic couple eliminated.
  • City building Embedded installation.

Claiming Climate Energy

  • No lock-down during storm force wind.
  • RPM control by air-flow Bypass.
  • Torque control by Vane displacement.
  • No yaw Gear.
  • No synchronous gearbox.

The Value Proposition


  • RVCR reduces Levelized cost of Power and revolutionizes the wind Power Prime-Movers to be a highly potent and viable means for claiming a much larger share of Power Production and Energy Market.
  • RVCR liberates large wind energy production units form geographical constraints “Out of city and Populated areas) and enable city based embedded Power Generation units.
  • RVCR wind motors are highly compact and easy to handle so, with lower manufacturing cost leading to lower capital investment.

The Principle


RVCR wind Motor configuration converts higher wind velocities at elevated levels into low pressure communicated through a wind stack to higher air pressure at ground level ('near zero air velocities) and utilizes RVCR wind motor (Prime Mover) at lower end of the stack to tap into the flow in the rising column of air for power generation. This is made possible due to key attributes of RVCR methodology in simplifying the means to achieve a ‘Rotary Positive Displacement Mechanism’.


RVCR Viability


RVCR enables Wind Power driven Prime-Movers Systems embedded into modern high-rise city structures to overcome constraints of large wind turbine based Renewable Power installations to out-door locations.

‘Pressure differential’ is a scalar quantity independent of fluid flow direction which eliminates the yawing, furling and stalling related accessories, thence drastically reducing complex structural requirements necessary for conventional turbines. RVCR reduces remote locale related costs (transportation, installation, distant power transmission infrastructure) coupled with enhanced efficiency of energy conversion making it a cost effective, pragmatic, high efficiency, green captive power unit.

The simplicity and ease of installation at point of power demand and consumption of RVCR Wind motor power generator units, empowers rural populace with energy self-sufficiency at minimal cost of erection and maintenance hence improving the local economy into self-sufficient independent rural communities.


The Impact


A source of round the clock, self-sufficing economic power generation unit at proximity, eliminates the extremely demanding energy concerns of populace in general that provides for independence towards tapping the enormous opportunities available locally, leading to a continual upgrading cycle of improved standard of living.

RVCR Wind motor is a pragmatic, cost effective, zero emission power generating unit, hence free of green-house gases to address 21st century global environmental concerns.

RVCR wind power motors are better, efficient machines compared to conventional wind turbines.




The Description - RVCR wind energy Prime-Mover


At higher altitudes, wind flow is laminar and creates low pressure perpendicular to the flow direction. At near earth surface the wind speed is lower due to resistance from friction with ground, obstacles from buildings, trees etc. As the distance from earth surface increases, resistance to air flow decreases and it results in higher wind speeds. The no slip condition gradually tapers off at greater heights.

Conventional Wind Turbines

Conventional wind turbines are usually located at places; far away from city, where there is enough room to install them and no danger to populace. Main drawback of these conventional wind turbines is the location constraint, as these systems should be installed away from the city or areas of electric power demand.

The structure of these wind turbines is bulky and difficult to transport blades turbines to the specified windy locations like high tops or coastal/Off-shore areas and needs special transport infrastructure.

During the operation, turbines need to orient’s itself to the direction of wind flow and the Yawing, furling and stalling needs requires special drives, resulting in complicated structure. Initial cost of these turbines is quite high, consequently increasing the overall cost of the wind energy.

RVCR Wind Motors

RVCR wind motor utilizes pressure differential phenomenon at different altitudes (Bernoulli's principle). For example, the upper region is the top (roof) of a multi-story building and the lower region is bottom (Basement) of the same building. As the wind blows over the upper region, according to Bernoulli's principle, pressure is lowered with increased wind speed; hence the air from the lower region which is comparatively at higher pressure, when provided with suitable flow path flows rapidly towards low-pressure zone in the upper region. This suction force is utilized to generate power by RVCR wind motors. Air flow from lower to upper region is channelized through stacks. Air flow velocity from lower to upper region is a function of pressure differential between the same. So, the more the height of a building, the more will be the pressure differential and consequently, more power will be generated.


Click to enlarge the diagram

Advantages and benefits



  • PTO (High Efficiency Positive Displacement Mechanism)
    • In Comparison with a 3-bladed conventional wind turbine, energy capture ratio of RVCR-WPM is higher as it is a positive displacement unit, as the entire flow channel air force acts on the vanes unlike in conventional turbines where a large portion of the air flow through effective flow channel area (blade tip circle) bypasses the unit without working on the aerofoil blades. The RVCR-WEA configuration has a convergent-divergent nozzle induced pressure differential across the vanes that transfers the air energy much more effectively than in conventional turbines, hence increased the efficiency of the system.
    • RVCR-WEA being a compact lightweight unit allows easy and rapid alignment of convergent-divergent nozzle with the air stream flow direction and vertical positioning to align with maximum throughput height enables maximum energy capture of air stream flow.
  • PWR (Power to Weight Ratio)
    • No Yaw gearbox is required :
      Comparatively fractional mass of the convergent-divergent nozzle and no gyroscopic forces ensures that the RVCR-WEA Power generator alignment to the flow is performed with the help of directional fin, whereas in conventional Air turbines, for positioning the turbine to align with air flow requires complicated, costly & increased weight of the Yaw gear.
    • No Synchronous gear requirement :
      The Vane RPM control by simplified quantitative air flow governing with help of short-circuiting the air flow through the RVCR-WEA by means of flow control valves placed at air outflow stack.
    • No Cantilever effect & simply supported Vanes :
      Conventional turbine blades are huge cantilevers with very high stress levels hence require specialized metallurgy and very robust design leading to excessive mass of the blades, whereas RVCR vanes are not cantilevers but are simply supported beams, hence requires simplified design, metallurgy & lightweight hollow structure, considerably increasing the Power to Weight Ratio.
    • Weight reduction by Vane geometry Optimization :
      The increment in rated power is proportioned to unidirectional increase in blade length, however RVCR-WEA scaling up is achieved by optimizing the casing chamber cross-sectional area wherein, the perpendicular minor & major axes provide for bidirectional degree of design freedom for scale-up.
  • Transportation &Installation Advantage
    • RVCR-WEA Power generator is a compact and the ease of design enables easy sealing of the entire unit into a air-tight entity, thence designed buoyant to be towed by conventional Load carrier and do not require specialized transportation vehicles as in case of 3-blade air turbines.
  • Lower Cost of Maintenance & Increased Capacity Factor
    • Lower Stress Level on components compared to conventional Air turbines, lighter vanes in the RVCR-WEA unit have lesser chances of failure and hence lesser downtime.
    • Ease of maintenance facilitated by man hole provided in stack and telescopic dismantling arrangement.
    • Lesser functional variables in RVCR-WEA unit hence easy control, lesser maintenance & higher efficiency.
  • Environmental Impact
    • Air flow through nozzles means no exposed rotating parts prevents noise generation in RVCR-WEA unit and allows easy inspection by either remote or manually by mobile maintenance unit.
    • Compact & lightweight RVCR-WEA unit has a lower Carbon footprint than conventional 3-blade turbine.





RVCR Hydro Motor Project


Introduction

The RVCR Hydro Kinematic Prime-Mover Project is based on the invention titled ‘Fluid Driven Prime-Mover’ and which covers both the hydro cum wind Motors inventions. The Project to develop its technology was 1st conceived as a joint endeavor with the university of Maryland, and through funding from INDO US Science and Technology Fund. The network was developed with an American Manufacturing as a Partner however the difficulties form various fronts has held the project. GYATK is awaiting to find suitable funding partners to initiate this project kickoff.

The RVCR Hydro Motor has system configuration has two variant wherein the 1st one is for tapping energy from flowing water as in rivers, canals tidal water and ocean currents and the other for wave energy.


Click to enlarge the diagram

RVCR Synopsis

An entirely new Principal in Prime-Mover Drive Mechanism that that enable multi-fold increase in energy capture efficiency compared to modern wind turbines. The RVCR principal simplifies the mechanics of Prime-Mover to reduce the Capital Cost drastically and the engineering involved reduces operations cost.

The Conventional Hydro Kinematic system use turbines to extract drive power from flow energy in canals, rivers etc.

RVCR HKPG is a new method is a rotary positive displacement mechanism that uses pressure differential created from flow energy of water as a drive force.

Unique capabilities



RVCR Hydro Power Generators (HPG)

Departure from Convention

  • On shore Installation of Power Unit.
  • No open water rotating blades.
  • No hazards to natural Hydrology
  • No Gyroscopic force related equipment.

Claiming Climate Energy

  • No lock-down during storm force wind.
  • RPM control by water flow Bypass.
  • Torque control by Vane displacement.
  • No yaw Gear and syncs gearbox.

The Value Proposition


  • RVCR HKPG reduces Levelized cost of Power and revolutionizes the Hydro Power Prime-Movers for claiming a much larger share of Power Production and Energy Market.
  • RVCR HKPG design enables ‘shore or dry installation’ of prime-Mover and generation units. The submerged units are provisioned with a Buoyancy ballast for retrieving units for maintenance and operations. This makes maintenance cost effective and lowers long term operations cost.
  • RVCR Hydro motors are highly compact and easy to handle so, with lower manufacturing cost leading to lower capital investment.

RVCR HK Mechanism Principle


Hydro-Kinematic Power Generator (HKPG) is a Positive Displacement Rotary Mechanism which utilizes pressure differential created by the water current made to flow through a convergent divergent nozzle. A fluid flow induced by pressure differential between two different points is routed through the flow channels of RVCR-HK, where in it works against a rotating vane inside an enclosed chamber by pushing it and creating torque on a shaft to generate continuous output torque.




The Description


RVCR HK mechanism-based Power Generators motors are better, efficient machines compared to conventional 3 blade (or More blade) turbines. The Conventional turbines are driven by lift, achieved by Hydrofoil profile of turbine blades. The axial flow turbines are rotary machines converting the Kinetic Energy water current into Power. RVCR is a rotary positive displacement mechanism that uses pressure differential created by differing fluid flow conditions.

Conventional Turbines

Conventional turbines are placed in the flow path of the fluid current. The structure of these turbines is quite bulky. It is always difficult to transport components (like blades) of these turbines to the specified sites and requires special vessels. During the operation, turbine should orient itself against the direction of water flow. Initial cost of these turbines is quite high, consequently increasing the overall cost of the Hydro-kinematic energy. Yawing, furling and stalling demands special drives, this results in complicated structure. Turbines are not positive displacement machines, so the flow efficiency is lower

RVCR fluid Motors

The RVCR Kinematic mechanism comprises two identical vanes (V1 and V2 in the figure) enclosed in toroidal (hollow doughnut shaped) casing and the vane edge geometry is the same as the cross-section of the casing hollow space. The vanes are rigidly connected to the ends of two intermittently rotating rotors facing each other. The vanes are angularly displaced within the chamber and the cycle begins with the vanes are positioned initially adjacent to each other and near inlet and outlet port respectively while maintaining a defined minimal angle between them. The vane V2 (Shown in Figure No.) is held stationary with the action of vane motion control elements while V1 is coupled to the central shaft and rotates. After rotating through a definite angular distance, where in the moving Vane V1 approaches the stationary Vane V2 and it has an inclusive angle same as it had at the initial position with V2 behind it, both vanes are coupled to the central shaft and rotate simultaneously and acquire interchange positions where in the moving vane is at the position where V2 was kept stationary. Now the V1 is stationary and V2 moves and cycle continuous. The vane position inside the chamber is read at space outside of the casing and motion control mechanism controls the intermittent rotary motion or each vane and converts it into continuous motion on output shaft.


Click to enlarge the diagram

The RVCR HK has a Convergent divergent nozzle integrated with it as shown in figure No 1 and is placed in flow path of water current and the water is driven through the nozzle creating a low pressure at the venturi throat. This low pressure is communicated to the back of the vane face plate. Shown in Figure No. The structure is mounted on base through supporting column and the nozzle support columns have a fluid flow blocking plate that influence direction change and hence building up pressure. This high pressure is communicated through inlet ports in the casing to the opposite face of the vane exposed to the low pressure on the other side which drives the vane.

Advantages and benefits



  • High Efficiency positive displacement mechanism.
  • Easy Maintenance: No special machineries required for accessing the RVCR Hydro-Kinematic Power Generator as the buoyancy effect can be utilized by inducing compressed air into the machine.
  • Fully enclosed Structure.
  • Hydrodynamic design.
  • Simplified metallurgy of vanes & mechanism parts encased in protective casing.
  • Multi-segment assembly hence low level of working stresses.
  • Less frictional loss lesser no. of rotating components.
  • Easy transportation and handling compared to conventional water turbines.
  • Lesser No. of components: Ease of manufacturing and assembly.
  • Lesser mating Parts & contacts.
  • Customized sizing advantage.
  • Easy scaling: Easy design for scales-up & scale-down versions.