Posts Tagged ‘sun’

Updates on the Solar Heater

Monday, March 9th, 2009

The Solar heater has been running for about 1 month now and I have a few updates to make on it's performance:

space_heater_main_sc.jpg

  •  Maximum observed temperature in room ... ~74 degrees
  • Out of the last 30 days in my office I've only had the heater on 2 times.
  • It's been a bit warmer and sunnier than usual (2 F greater average temp in Feb in 2009 than 2008)
  • Estimated energy savings on electric heating bill in February, March (and by inference Oct and November) ~50-75% of total bill.
  • Number of hours of heat delivered per day ~8
  • Time when maximal temperature is reached ~3 pm
  • Time when temperature in room drops below 65 F after a full day of heating- ~10 pm-1am.
  • Maximum temperature inside heater ~110-130 F (even when it's 30 F outside)
  • Possible efficiency improvements:
    • glass on front of box instead of polycarbonate, with better sealing to minimize convective heat loss and maximize solar gain.
    • air must be collected from bottom of room for optimal heat exchangement
    • neighbor's tree and house must be removed for more direct sunlight.

But overall I'm quite happy with the project.  It has practically already paid for itself and best of all... my wife thinks that it's an acceptabley asthetic project completed on a nice timeline to warrant further tinkering in the garage :-)

Compost and the problem of Evil

Wednesday, February 25th, 2009

Every serious gardener has a compost bin.  They throw their old, unused vegetables, egg shells and other miscellaneous vegetables in it.  And there it sits, dead and rotting for a whole year before it goes back into the garden... as an afterthought to most.

But what an awesome[1] experience it is to discover that what we cast aside as dead and rotting is truly alive and thriving!  What man has cast aside, God has infused with millions of tiny bacteria! And all those bacteria are busy making a feast of your left over broccoli stems and coffee grounds.

In fact they are so happy eating away at your refuse that the party literally gets hot!  The chore of walking out to stir the compost on a cold winter morning can only be  redeemed by the wonderful phenomenon of a steaming pile of old vegetables.  And yes, when you put your hand close to the pile it really is hot!

The bacteria eventually consume everything and turn it into the richest and most protective, life nurturing fertilizer.  Compost really can get just about anything to grow... anywhere (even Colorado).

It's cheap (actually it has negative cost),  and it's easy.  But on a large scale it makes up a tiny portion of the fertilizers used in agriculture.  It provides a chemical-free, and bioengineering-free growing medium that anyone in the world  can produce locally, efficiently and cheaply.  All gratis from the Lord.

And yet, who do we first blame for the evil of starvation?  Who do we first blame for the evil of cancer?  Who do we blame for wars which are usually driven by the economics of land and agriculture?

God may have cursed man to work the soil by the sweat of his brow, but then he gave us rich topsoil from compost to make it easier.  God may have punished women with the pains of child birth, but then he gave her pain killers to make it easier.  God may let it be dark and cold in the winter, but he gives us the warm sun to collect with the simplest of technology.  God gave us the ten commandments, and then gave us Jesus.  God allows our bodies to die, but our selves to be resurrected.

God is like that. He gives a righteous judgment and then gives us a pardon.   That's amazing grace.

So from whence comes evil? I'll start with myself....

  1. as in full of awe []

Building solar projects on the cheap

Thursday, February 19th, 2009

For the last week or so I've been semi-obsessed with building and testing out my latest solar project: a solar powered space heater for my office.  You can check out my work which I documented here .

I've also recently built and tested (with success) a Tesla Turbine ... I'll probably make a page dedicated to it as well .

Finally, I'm working on YASP (yet another solar project).  This time I'm making use of my math and artificial intelligence skills.  I'm writing a piece of software which simulates a reflecting dish that (ideally) focuses sunlight on a central point.  Parabolas do this just fine, but the problem is that when the sun moves the parabola has to as well.  I'd like to find a dish shape that requires no moving through the day and still reflects a large portion of the solar rays (even as the sun travels across the sky) onto a central area.

So yep... things are humming along over here!

The Benefit of reading Sci-Fi

Thursday, September 25th, 2008

Space man Legos Well, not just Sci-Fi, but fiction in general.

As I've been reading 2010:Odyssey Two by Arthur C. Clarke I've been rediscovering my love for Sci-Fi literature.  The last Sci-Fi novel that was this good was Ender's Game by  Orson Scott Card...and before that it was Dune by Frank Hebert. (Seriously, you should read these books... they are good literature no matter how snooty you are :-)

My brother read almost all of the spin-off series to Star-wars... many take Star Wars and Star Trek as near religion.

The main benefit to these books is not just entertainment, relaxation and a sense of identity... though these certainly are benefits.

The main benefit to a good work of fiction is that it helps you to dream, to escape your boxes and to dare to imagine the impossible.

What could man achieve that he isn't currently achieving?  What in your mind is commonly held to be impossible that you know is possible?

For me, I dream of cheap energy and abundant artificial intelligence.  Never before has man been on such a cusp of free-time.  We know how to capture the sun for energy, we know how to farm intensively without draining the soil of it's nutrients, and we have computers which can learn, work,   and behave like very simple intelligent beings (often outperforming us at many tasks).  Couldn't we live in a semi-utopia with the help of our technological advances?