Heatsinks in Europe

Hey erl, have a look at the heatsinks above (they are links), they all have fins that are ribbled (this is to get a bigger surface, to have more heat dissipation)

Kuifje76 said:

Hey erl, have a look at the heatsinks above (they are links), they all have fins that are ribbled (this is to get a bigger surface, to have more heat dissipation)

Click to expand...

Thanks

Hey just an update about FisherElectronic, indeed quiet pricy !

SK 535 500 SA
Qty: 2 pcs
Price: € 378,-- ea.

+ freight costs
+ 19 % tax

Leadtime: 2 – 3 weeks after receipt of payment

Value of order: € 25,--
Conditions of delivery: ex works
Conditions of payment: in advance
Validity of offer: 2 months
All rights reserved

Only problem , they don't sell to single people, only companies

Holy moly! That is some expensive sh*t there! I still want to get my hands on it though

You might try GAMAalumínium. They have a very wide selection. The company is based in Slovakia.

http://www.cbd-lighting.nl their distributor for Benelux
http://www.soselectronic.com their distributor for Central Europe

alesh said:

You might try GAMAalumínium. They have a very wide selection. The company is based in Slovakia.

http://www.cbd-lighting.nl their distributor for Benelux
http://www.soselectronic.com their distributor for Central Europe

Click to expand...

Nice @alesh thanks for that.....am designed something sexy for leafy vegetables. Probably COMPLETE overkill, but it will be a thing of beauty

Any ideas on optimal fin height? I am thinking 40mm should suffice no? One COB centred on a 150mm width and 200mm length of heatsink. Weld these heatsinks together 6 at a time to provide a 350 x 600 array to cover a 300 x 600 shelf.

CellarDweller said:

Nice @alesh thanks for that.....am designed something sexy for leafy vegetables. Probably COMPLETE overkill, but it will be a thing of beauty

Click to expand...

Don't forget that none electronics project is complete without an enclosure Which would make SDS the only person there who actually finished a light.

CellarDweller said:

Any ideas on optimal fin height? I am thinking 40mm should suffice no? One COB centred on a 150mm width and 200mm length of heatsink. Weld these heatsinks together 6 at a time to provide a 350 x 600 array to cover a 300 x 600 shelf.

Click to expand...

More info...COB power, active/passive, which HS (number of fins at least)?

alesh said:

Don't forget that none electronics project is complete without an enclosure Which would make SDS the only person there who actually finished a light.


More info...COB power, active/passive, which HS (number of fins at least)?

Click to expand...

Fully enclosed system
COB likely to be CXA3590 at 1A
Passive Heatsink (but with one fan blowing cold air across the fins and another at the other end sucking hot air away from fins)
Something like the IT5498 in the GAMA range (1261mm perimeter, 13 fins + 2 end ones, 10mm spacing on fins, base plate 9mm thick, fins 31mm high, 0.62C/W)

One COB per 200mm length of the above Heatsink. 6 COBs arranged in a 2 x 3 grid, giving total array of 450 x 600 (not 350 x 600 as I said above).

I have an idea to have the intake fans sucking air from outside the tent onto the heatsink. Then this air is sucked across the heatsink and away via a fan at the other end of the box, this air is directed into the growing chamber, where is heats the chamber and there is another fan venting "used" air out. Making complete use of the COB heat dissipation to heat my growing environment and using the air intake activity to provide coolant for the heatsink and CO2 for the plants.

The light is potentially overkill for vegetables/lettuce etc......but I am convinced that with the longevity involved and the ability to grow like this 365 days per year for the next 10 years....well.....the ROI is there This light should be able to replicate the intensity of sunlight in an enclosed space with diamond mylar on the walls.

This will be my first prototype, then I am looking to control dimming over the day cycle, including UV and IR LEDs to truly integrate natural conditions.

I'm mailing them for prices right now, my cobs have arrived 20x cxa3070 AB with cobholders
Could somebody calculate the max. heat dissipation for 1 IT 5498 (1261mm) with 0,62°C/W for 150mm
I'm thinking 5 per bar with 2 vents on each end, just trying to figure out how high i could go

Those in EU can ask here for some heat sinks (limited selection for COB use ,myself I use-always- the ST20 model )
and for cases (can be customised regarding holes and openings/grills ,myself i use the 703 model-custom made ,w/o the bottom lid vent holes ) .
Company is based in Hellas ,prices are fairly low ,guy ( Manolis ) who owns the company is a very helpful dude.
Quality is very good.Ask for shipping costs.

Heatsinks
http://www.normabox.gr/website/product_info.php?cust_id=&template_id=&lang=gr&cPath=9&cust_id=&template_id=&lang=gr&cPath=9&products_id=22&lang=en

Cases
http://www.normabox.gr/website/product_info.php?cust_id=&template_id=&lang=gr&cPath=8&cust_id=&template_id=&lang=gr&cPath=8&products_id=33&lang=en

Contact
http://www.normabox.gr/website/product_info.php?cust_id=&template_id=&lang=en&cPath=8&to=contact.php

thanks Stardustsailor, i'm awaiting authorisation to see prices

Kuifje76 said:

thanks Stardustsailor, i'm awaiting authorisation to see prices

Click to expand...

Better probably to e-mail .
(I'm not sure if there's a automated authorising routine ,there...
Right now is 22:30 and all small scale private companies in the country are closed.)

I know that the ST20 heatsink has a price of around 16 Euros (non- black anodised version ) ,
while the 703 case has a price of about 30 Euros .
(You can ask for discount ,I guess ... )

The case is made of 7 parts ( 2x sides ,bottom lid,top lid ,front panel ,rear panel and inner plate ).
Case is made of hard steel sheet with the inner plate ,the rear and the front panels made out of aluminium.
It has also 2x plastic/alum combo handles on front panel .
Really rugged & heavy-duty case ,but it needs lots of work
(cutting openings,drilling holes,sanding,rustproofing and painting ),
to be transformed into a LED grow light case.But it's worthy all the way .

Cheers.

stardustsailor said:

Better probably to e-mail .
(I'm not sure if there's a automated authorising routine ,there...
Right now is 22:30 and all small scale private companies in the country are closed.)

I know that the ST20 heatsink has a price of around 16 Euros (non- black anodised version ) ,
while the 703 case has a price of about 30 Euros .
(You can ask for discount ,I guess ... )

The case is made of 7 parts ( 2x sides ,bottom lid,top lid ,front panel ,rear panel and inner plate ).
Case is made of hard steel sheet with the inner plate ,the rear and the front panels made out of aluminium.
It has also 2x plastic/alum combo handles on front panel .
Really rugged & heavy-duty case ,but it needs lots of work
(cutting openings,drilling holes,sanding,rustproofing and painting ),
to be transformed into a LED grow light case.But it's worthy all the way .

Cheers.

Click to expand...

Like x 10,000,000

Kuifje76 said:

I'm mailing them for prices right now, my cobs have arrived 20x cxa3070 AB with cobholders
Could somebody calculate the max. heat dissipation for 1 IT 5498 (1261mm) with 0,62°C/W for 150mm
I'm thinking 5 per bar with 2 vents on each end, just trying to figure out how high i could go

Click to expand...

Where did you get the holders buddy?

I got the cobs and cobholders at Arrow United States, should have watched the dollar more before ordering , mails and ideas date from a few months ago.
It had to go fast and it did cost me way to much money (extra taxes , first plan was to go through another buddy of mine that lives in the states to avoid taxes)
Arrow Europe didn't respond to my mails where i was asking to by them by 20, so i just ordered them there.

Oh not really complaining, i'm glad they're here let the building begin !

I'm hoping normabox also sells bigger ones, i'd like to have 120cm for 5 cobs, that would be ideal !
I don't have a lot of room, i'm thinking big and want to divide the closet (height 218cm intern) into 2 sections to be able to grow more

I think they can cut longer lengths than 200 mm ,actually ..
But brother, the 200 mm ST20 has a weight of ~ 2kgs ..
That means that at 1200 mm ,the heatsink will weigh 12 kgs !
Maybe you should also consider the 2x 600 mm option ..

Cheers

the idea is to blow air from one end to another and to have 2 bars hanging on a shelf (L-profiles) with wholes at the the end of the shelf for the ventilators, so i don't need a case but I want the height to be as little as possible
weight shoudn't be a problem i guess since i do not plan to lower or heigher them, but put something under the plants to achieve the appropriate height. Top shelf should be ok since that one is ment for 2e month of flower and then the stretch will be over, I think about cutting the roof out for the top shelf.

I have 'ideal' cobholders so eventually I think reflectors will follow

Kuifje76 said:

the idea is to blow air from one end to another and to have 2 bars hanging on a shelf (L-profiles) with wholes at the the end of the shelf for the ventilators, so i don't need a case but I want the height to be as little as possible
weight shoudn't be a problem i guess since i do not plan to lower or heigher them, but put something under the plants to achieve the appropriate height. Top shelf should be ok since that one is ment for 2e month of flower and then the stretch will be over, I think about cutting the roof out for the top shelf.

I have 'ideal' cobholders so eventually I think reflectors will follow

Which are those ? 600mm option ? I can't find it at their site...

Click to expand...

You sound like you're on precisely the same design as me I would share my sketches....but they're embarrassing!

Kuifje76 said:

the idea is to blow air from one end to another and to have 2 bars hanging on a shelf (L-profiles) with wholes at the the end of the shelf for the ventilators, so i don't need a case but I want the height to be as little as possible
weight shoudn't be a problem i guess since i do not plan to lower or heigher them, but put something under the plants to achieve the appropriate height. Top shelf should be ok since that one is ment for 2e month of flower and then the stretch will be over, I think about cutting the roof out for the top shelf.

I have 'ideal' cobholders so eventually I think reflectors will follow

Which are those ? 600mm option ? I can't find it at their site...

Click to expand...

Just ask them if they can cut for you a 600 mm length...
Maybe they can do that ..