Periodic Dosage Archive 2011-08
Solar Power: Photovoltaic vs Solar Thermal
Been spending few hours geeking about solar power.
There are 2 primary types: photovoltaic and solar thermal. Photovoltaic is the solar panels we are familiar with. i.e. a flat panel that turns sun ray into electricity directly. (e.g. on your calculator or house roof)
Solar thermal is using reflection to direct sun ray into a focal point, which turns into heat, and in turn generates electricity (usually by steam turbine).
Being a efficiency nerd, my question is, which type is more efficient at massive scale?
There are power plants using either types.
Photovoltaic is rather boring looking. You just have lots of flat panels on the ground. The reflection type is more sci-fi. (e.g. death star).
There are varieties of the reflection design. e.g. reflection parabolic troughs, that focus light into a line. The line is typically a thin oil pipe. This type is still boring to look at. You just have lots trough-like structures on the ground. Quite ugly too. Then there's arrays of flat mirrors on the ground that focus light into a high tower. Then there's giant parabolic dish ones — like a death star — the most eye-catching. See:
Solar Power Structures
My question about efficiency probably involves too many factors to be specified before one could say “which is more efficient”, but anyone got some comments?
gencdo: Gentle Cherishing Doll
2 persons i like to thank.
Technology for Knowledge in Past Decades
Story: My Teen Years in Bagel Making
My Personal Photos of Steve Jobs (1955 to 2011)
Why Are Scores in Video Games Mega Huge?.
9/11, and Human Animal's Love for Excitement
Internet is For Porn
Funny Video: Cat Teasing Dog
Xah Lee Blogs and What You Like to See?
Recently on Google Plus i asked where people know me from and what they like me to post on Google Plus.
One conversation leads to the fact that some people don't know i have webfeed of separate topics. So, here's a Reminder, and a poll.
If many subjects in my blog are not interesting to you, you can subscribe to individual topics, e.g. emacs only, programing only, math only, arts only, etc, at this page: Subscribe to XahLee.org Site Feed.
This blog at
is a aggregate of all, but except english vocabulary subject, which you can subscribe at
Am also on
In these places, i post links to new articles, and selected old articles few times a day.
Also random chat (mostly on Google Plus).
If you like my articles, please retweet or tell friends. Thanks for helping.
Bill Maher on American Socialism 📺
Internet Hipsters and Hipstering of our Age (essay)
Anonymous Hacked Syrian Military Site
Just regenerated Wikipedia link report for my website. Now at 5927 links to Wikipedia articles, spread among 1406 pages. See: Links to Wikipedia from XahLee.org.
Accosted by a Sexy Anonymous
Got this comment the other day:
Bro you are a god among. I love you. Meet me and we can have RL sexy times.
Xah Lee said:
r u a sexy anonymous?
Perhaps… Why don't you see for yourself? I will be at the corner of W El Camino and W El Monte Ave, at the McDonalds today at 4pm our time. Just so you can find me, I have blonde hair and blue eyes and am 5'11. I will be wearing a white halter top.
See comment at:
Am i axing a big opportunity?
Note she mentioned blue eyes and blonde hair. That's my achilles's heel as i've blogged here and there. And she pinpointed the locality, and she might be local. She must've read maybe alot bout me. But i don't know anything about her. Is this a joke? or is she a real fan?
what would you do?
To the sexy anonymous if you are reading this: yeah i still want sex. But what is it you want?