This is a short description of the parts of the Brassac Green Revolution Energy Converter Lab Model v2, now under construction and almost all parts are already manufactured in Brassac France. Assembly started in Motala Sweden and is continued at FabLab in Brassac.
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The first version of the GREC Lab Model
delivered very promising but non documented results. When we opened it up to
provide it with syncronised sensors for temperature and pressure, we decided to
put in new Revolving Shutters as well. But finally it was easier to build a completely new Lab Model instead. We updated all our FreeCAD dxf drawings and in autumn 2018 we started to manufacture a completely new set of parts using the Brassac FabLab high precision CNC cutter. Click this link to see current status of the project. Below are the original 3D generated images that we used when updating our .dxf files for the FabLab CNC cutter and also photos of the resulting machined parts. |
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First 3D generated image is the 600x600x10mm end plate with a circle of holes to keep the construction together but also to be sure that all added layers will be perfectly aligned. The centre hole for the roller bearing is cut at the same time. Download Shell600GabaritHoles_a.dxf here. | 
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| We used a blue composite material
for the "End Plate". The centre hole holds its
SKF roller bearing and some of the holes in
the peripherial circle have a screws inserted. (Sorry for the conflicting colours between the 3D sketch and the real model) |  |
The Green Revolution Energy Converter is built in layers. The layer following the "End Plate" is a layer with heat conductive and insulating fins. This scematic 3D generated image shows adding two 6 mm insulating "Nil Fins" for insulation between the heat conductive fins of the cold and the warm side of the Green Revolution Energy Converter. In this version of the Lab Model we have choosen to integrate the first layer of fins directly in the endplate (see photographic images)
| The two "Nil Fins" in the 3D drawing are identical. The drawing to the right is in larger detail and you may also see the circle of holes that aligns all the layers. Download nil fin .dxf here. |
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As mentioned earlier, an alternative to adding a first layer of nils-fins, you may cut down the 6mm conducting fin profile directly into the end-plate. We have choosen to do so in this Lab Model integrating the first layer of conducting and insulating areas into the end-plate. |
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Adding two conducting fins at the same layer as the insulating fins. The conducting aluminium fins will be the area that transfer heat in and out of the "Work Generating Volume". Both of the conducting fins are made of 6mm aluminium as seen in the photograph, and they will be gued in place. The 3D image has conducting aluminium fins in colours blue and red to mark out that one is situated on the cold side (blue) and the other one on the warm side (red). Again, so sorry for the conflicting colours between the 3D images and reality. In this Lab Model we decided to make them a bit longer so we can “interface” with external cold and hot sources. Download conducting fins here .
When you look close at this picture there are "Nil Shells" on top of the
fin layer. Download the nil
shells here .
The nil shells will create the boundary of the system volume
together with the conducting shells that you may see in the following 3D
generated image.
Both the nil and the conducting shells will be glued
on the fin layer so the "End Plate", the "Fin Layer" and the "Shell Layer"
will become one unit.
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The following 3D images shows how we add the middle layer of fins starting with the nil
fins and then adding the conducting fins.
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The photo shows the middle layer. Note the pre-manufactured traces for sensors (temperature and pressure) and electrical wires. Also showing two spools of Teflon coated wiring that we will use. |
Starting with the boundary shells on top of the fins.
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An additional layer of fins to transfer heat in and out of the Work Generating Volume of the Revolving Shutter.
Photo shows layer side up of the integrated "End Plate". We just have to
turn it, fit the roller bearing and start fit screws in the circle of holes
to seal the complete system volume.
The GREC system boundary is finally sealed by an End Plate on top of the last layer of insulating and conducting fins.
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By fitting it all together and using an electrical motor to turn the revolving shutter the GREC Lab Model v2 will start to deliver real world values on pressure difference in relation to rotation speed and temperature difference so that anyone can calculate on its usefulness in their applications. That’s it!
To conclude, a parts list of the Brassac GREC Lab Model version 2 with
downloadable CAD files in .dxf format,
click on the corresponding icon to download :
| Component | Pcs | info | comment |
| End Plate 600x600x10mm | 2 pcs |
Shell600GabaritHoles_a.dxf | (Same End Plate both for motor side and control side) |
| insulating Nil Fins thickness 6mm | 6 pcs |
Fin600r41iso6Holes_a.dxf | isolant 6mm |
| conducting Alu Fins thickness 6mm | 6 pcs |
Fin600r41alu6Holes_Solar.dxf | alu 6mm with extended base for Lab connection |
| insulating boundary Nil Shells 10mm | 4 pcs |
Shell600r286iso10b.dxf | isolant 10mm |
| conducting boundary Alu Shells 10mm | 4 pcs |
Shell600r286alu10b.dxf | cale en alu 10mm |
| Revolving Shutter with Work Generating Volume | 2 pcs |
revolving shutter surface drawing | 2x alu 2mm (double with internal foam) |
| Revolving Shutter internal distance | 2 pcs |
revolving shutter internal distance drawing | alu (to set internal foam measure) |
| Revolving Shutter shaft | 1 pcs |
revolving shutter internal shaft drawing | steel (Length 47mm, Dia 20mm) |
| Revolving Shutter bearing | 2 pcs | SKF 20 47 14 32 000 1204 ETN9 | |
| nuts and bolts | lots of | M3 et M5 | |
Good luck in building your own Green Revolution Energy Converter supplying you with lots of free energy!
Click this link to go to the nilsinside PROJECT page.
