FRELP

Full Recovery End Life Photovoltaic

Technical progress – April 2014

April 2014

FRELP: progress at the end of APRIL 2014

In particular, we dealt with thoroughly investigate the following systems:

a- heating different test with infrared of panel EVA + GLASS;

b- EVA detachment from the glass after heat treatment;

c- separation optical glass polluted by contact seals in the glass / aluminum;

d- recognition of the composition of the backsheet as a function of pyrolysis behavior;

e- mode-gripping of the panels with suckers;

f- mode cutting of aluminum profiles;

g- mode breakout of aluminum profiles once cut corners.

 

Below we describe briefly how it’s operated:

a1- were tested three types of infrared, shortwave, medium, long. The solution will be the combination of these three sources of infrared as each has characteristics that are functional to the four important parameters for the preliminary heat treatment of the EVA detachment from the glass:

– Rapid heating;

– Heating differentiation between EVA and glass;

– Maintaining the temperature at the time of posting;

– Speed ​​of temperature regulation.

It is expected to complete the test of detachment within the month of June.

 

b1-Preliminary tests of detachment with four technologies:

– Detachment with fixed knife;

– Detachment with high-pressure water;

– Detachment at high pressure air;

– Separation tape with water-cooled.

 

c1- Optical separation of the glass recovered from the edges and polluted by rubber (gasket).

Tested the optical separation on the particle size of 5 mm.

Evidence of screening and crushing of the glass.

 

d1- It was identified with a tool pointing to distance for the recognition of the plastic as in the pyrolysis step is necessary to separate any plastics containing chlorine type pvc.

 

e1- Were tested different ways of taking on the “backsheet” in order to maneuver the panel according to the following phases of tearing of aluminum profiles and the connector. There are no particular problems.

 

f1- They tested two techniques:

– Cutting with a circular saw;

– Cutting with abrasive disc.

The best results for now are with circular saw, but it is expected to structure the system so you can make the interchangeable cutting devices, in order to adapt to any changes in the composition of the outer profiles of the panels.

 

g1- Were performed positively evidence of tearing of the outer profiles of aluminum, after the preliminary cutting of the edges, so as to have separated the four profiles, two short sides and two long sides.

 

Almost all systems have now been defined and partially made ​​of pre-reduced scale prototypes that have allowed to test the solutions provided.

The technology that has not yet been completely defined is that of point “b” as within the month of May will be ready for the pre-prototype that will test the two technologies, compressed air and high pressure water, including we will choose the most suitable practical application in the prototype.

The prototypes that have to perform CDEFG-phases have been identified, designed and evaluated.

The prototypes that need to perform the steps ab are in pre-prototype to be tested by the end of May and approved by the end of June.

The main difficulties, as expected, related to the phase b, but the preliminary results indicate that we have the solution handy.

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