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Sep 25, 2023 19 likes •212 views

Hot Water 24/7 from Wind Power A P R A C T I C A L R E A L I T Y A P R A OJ Birkestrand Pat. Pend. ojbirkestrand@rabbittool.com (800) OJB-CORP ! OVERVIEW ! 12 bladed upwind, direct- drive, non-furling HAWT ! Natural Sunflower look

SLIDE 1

Hot Water 24/7

from Wind Power

A P R A C T I C A L R E A L I T Y

OJ Birkestrand

Pat. Pend.

A P R A

jbirkestrand@rabbittool.com

(800) OJB-CORP!

SLIDE 2

OVERVIEW

! 12 bladed upwind, direct-

drive, non-furling HAWT

! Natural Sunflower look
! Virtually noiseless with

zero flicker

! Off-grid, on-site hot water

24/7

SLIDE 3

reaper.energy

! A reaction turbine operating below

its critical Reynold’s Number

! It used its Critical Reynold’s Number

to reliably repeatedly pivot out of the wind for decades

! But, this prevented it from ever

reaching higher power levels

The Machine That Won The West

SLIDE 4

reaper.energy

Today’s State the Art Machine

! Harvests only 5-6% of the Lift

Forces developed, at best

! Directly interacts with only a

tiny percentage of the molecules crossing its rotor disc

! The Bernoulli energy equation
ffers no valid blade torque

producing mechanism

! Operates at TSR of 6 or more
! Requires non-turbulent airs

Is this the Ultimate Wind Machine?

SLIDE 5

reaper.energy

! Blade torque goes to 0 at TSR = L/D
! Tower forces 10 x’s generator forces

when TSRs greater than 6 & rising

SLIDE 6

reaper.energy

! Most of the Lift & Reaction Forces

drive the generator vs tip over the tower.

! All of the molecules passing thru the

rotor’s plane interact with the rotor.

! The blade torque mechanism is clear.
! Operates at TSRs of 3 or less

My Resultant Machine…

takes the opposite design approach to the current state

f the art.

SLIDE 7

reaper.energy

Reaper’s Blade Layout Features

! The Rotor rotates the air flow, harvesting Newton’s Momentum Exchange
! The lift forces are oriented to mainly drive the generator
! The overlapping blades actively employ the Blown Flap Effect
! Blade tip speeds are maximized to enhance Coand! effects

SLIDE 8

reaper.energy

There exist three different “Force Velocities”

! Drag
! Reaction
! Lift

Reaper uses

nly Reaction

and Lift Forces

SLIDE 9

reaper.energy

! Natural Sunflower Look
! One man raised & lowered

with hydraulic hand pump

! Functions on zonal-friendly

short towers

! Safety rotor never over speeds

more than 3 times wind speed

! Virtually noiseless, flickerless

Reaper Features

SLIDE 10

Industrial strength behind a pretty face

Installs in tight spaces

SLIDE 11

reaper.energy

How best to harvest this wild wind beast?

(High Capacity Factor Electrical Energies)

(Storable Heat Energies)

SLIDE 12

reaper.energy

Indirect Water Heater

! Dual coil for wind, solar and wood

renewable energy inputs for hot water 24/7

! Heat easily stored overnite

and longer

! Modular, expandable to suit

SLIDE 13

It’s Hydraulic, Love.

1/20th the size & weight of Electrics

Unmatched compact ruggedness

No gear box required

Unique speed control opportunities

Combined Heat and Power (CHP)

SLIDE 14

reaper.energy

Power Kart

! Modular
! Portable
! Flexible
! Expandable

SLIDE 15

reaper.energy

A Reaction Turbine

with Enhanced Lift Features

! Operates above its critical

Reynold’s Number

! Interacting blades keep

turbulent flows attached

! Newton’s Momentum Exchange

Forces harvested

! Lift Forces oriented to drive

generator vs tip over the tower

! Blades back wind at 3 times the

wind speed, preventing over speed in any condition

! Requires unique TSR control
! Approx 12 Blades required

SLIDE 16

Most Importantly

! Torque from Lift & Reaction Forces increase

as D3, but the Power only increases as D2, not because the “Kinetic Energies” are being converted into “Potential Energies”, but because the power is proportional to these forces times the rotor RPM, which decreases as 1/D to keep the same TSR; hence the net power is proportional to D2.

! A machine designer, knowing this, would

design her machine similar to Reaper vs today’s 3 bladed machines.

! Proving or disproving this concept is the

main goal of my first machines.

! Designed & funded by OJ Birkestrand.
jbirkestrand@rabbittool.com

(800) OJB-CORP

SLIDE 17

And now, the Reaper going up and down…

(One Man Operation)

SLIDE 18

And now, the Reaper going up and down…

(One Man Operation)

SLIDE 19

Hot Water 24/7

from Wind Power

OVERVIEW

The Machine That Won The West

Today’s State the Art Machine

My Resultant Machine…

Reaper’s Blade Layout Features

There exist three different “Force Velocities”

Reaper Features

Installs in tight spaces

How best to harvest this wild wind beast?

(Storable Heat Energies)

Indirect Water Heater

It’s Hydraulic, Love.

Power Kart

A Reaction Turbine

with Enhanced Lift Features

Most Importantly

And now, the Reaper going up and down…

(One Man Operation)

And now, the Reaper going up and down…

(One Man Operation)

And now, the Reaper up!

(One Man Operation)