Searching \ for '[TECH] Solar Fuel Machine (for hydrogen) and Cree' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=solar+fuel+machine
Search entire site for: 'Solar Fuel Machine (for hydrogen) and Cree'.

Exact match. Not showing close matches.
PICList Thread
'[TECH] Solar Fuel Machine (for hydrogen) and Cree '
2010\12\24@031335 by cdb

flavicon
face
According to the BBC website a Swiss university has produced a prototype solar machine that uses cerium oxide as a catalyst to provide oxygen as the cerium cools down during the night. The prototype production is pathetic at 0.7 -> 0.8% efficiency, they hope to increase it to 19% which they think would be marvellous (I think that still sounds pretty poor).

<http://www.bbc.co.uk/news/science-environment-12051167>


Elektor report that Cree have announced their CXA20 LED array which produces 1K lumens at 11 watts (I haven't read the whole article, so assume this is input power).

<www.elektor.com/news/led-array-delivers-record-1050-lumens-at-11-wa
tts.1649039.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news>

Colin
--
cdb,   3/07/2009
--




spam_OUTcolinTakeThisOuTspambtech-online.co.uk

2010\12\24@042205 by RussellMc

face picon face
> According to the BBC website a Swiss university has produced a prototype
> solar machine that uses cerium oxide as a catalyst to provide oxygen as the
> cerium cools down during the night. The prototype production is pathetic at
> 0.7 -> 0.8% efficiency, they hope to increase it to 19% which they think
> would be marvellous (I think that still sounds pretty poor).

19% is above what you can typically buy Si PV at at present.
Higher exists.
Max theoretical Si single junction is about 28% afair.

Whether 1% is useful depends greatly on cost per area.
As a parallel example eg if you had a solar PV cloth which was about
free and which could be attached to house roofs for about free then at
1% a 1000 ft^2 roof would make about 100W.
Not very useful by most standards. But very much so in some circumstances.


> <http://www.bbc.co.uk/news/science-environment-12051167>

> Elektor report that Cree have announced their CXA20 LED array which
> produces 1K lumens at 11 watts (I haven't read the whole article, so assume
> this is input power).
>
> <www.elektor.com/news/led-array-delivers-record-1050-lumens-at-11-wa
> tts.1649039.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news>

LED sounds good, but
Cree do better than that already.
XLamp ML-E guarantees 1000 lumen at 10 Watt.
Better l/W at lower W

2010\12\24@050411 by Michael Watterson

face picon face
On 24/12/2010 08:13, cdb wrote:
> According to the BBC website a Swiss university has produced a prototype
> solar machine that uses cerium oxide as a catalyst to provide oxygen as the
> cerium cools down during the night. The prototype production is pathetic at
> 0.7 ->  0.8% efficiency, they hope to increase it to 19% which they think
> would be marvellous (I think that still sounds pretty poor).

19% is good compared to PV cells, maybe poor compared to water heating panels

More... (looser matching)
- Last day of these posts
- In 2010 , 2011 only
- Today
- New search...