Why this Blog?

The purpose of creation of this new blog was to add all my work that will solely related to my DIY Solar and wind electricity generation system. I will also add here the adventure of my DIY micro-hydro turbine (PAT) unit that has been planned to be implemented in the beautiful Kalam valley. In the recent past i unintentionally got attraction toward the green energy and studied a lot about.

My last visit to Karachi home was the turning point to divert all my intentions and resources toward getting into hybrid solar+wind electricity system. The 12 hours shedding at Karachi was really a mental shock to me. The 2Hours alternate load shedding scheme was so pathetic that for three nights i had only 6 hours of sleep in total. The Starting/Stopping the generator (located at the third floor) was a real muscular exercise especially the last part of the night.

The ready made solution requires a handsome amount of money. Here i will post my DIY approach to get the job done considering the advantage of being low cost, worth of experience and as per my requirement and quality. I intend to work on both Solar and wind turbine simultaneously so that to give the relief to my family.

Lets see will i have success in this endeavor?

Wednesday, February 13, 2013

WindMill Assembled

WindMill was assembled and with a minor wind got it rotation at No load. Still needs wiring and improvement in other things..

Let me show you a scary picture;)..My 4.5 year son standing near the windmill ..The windmill is not that fast but my camera can't capture the running object as stand still..

Sunday, February 10, 2013

Back to The WindMill

I am currently playing with three projects:
   1- WindMill   (90% completed)
   2- Solar Concentrator  (95% completed)
   3- Dual Axes Solar Tracking System (99% completed)

WindMill project needs more attention for long time. Yesterday did some more work. The Generator was assembled on the structure. today made Steel plate for holding the blades. As the blades are made out of 10mm thick PVC pipe. To attach the blade on the plate i need to add a wooden fixture between the blade and steel plate. This wooden structure should have flat at bottom and profiled at top. The Flat bottom shall rest on the steel plate whereas the blade will fixed on profile of wooden fixture.
I scanned a portion of PVC blade to get the profile vector of it and then made the 3D model for CNC machining.
You can see a piece of PVC blade perfectly fit on the CNC machined fixture.
I hope in few days i will start wiring of the windmill.

Friday, February 1, 2013

Can Concentrated Solar Power generate MW of electricity?

Concentrated solar power (also called concentrating solar power, concentrated solar thermal, and CSP) systems use mirrors or lenses to concentrate a large area of sunlight, or solar thermal energy, onto a small area. Electrical power is produced when the concentrated light is converted to heat, which drives a heat engine (usually a steam turbine) connected to an electrical power generator.

CSP is being widely commercialized and the CSP market has seen about 740 MW of generating capacity added between 2007 and the end of 2010. More than half of this (about 478 MW) was installed during 2010, bringing the global total to 1095 MW. Spain added 400 MW in 2010, taking the global lead with a total of 632 MW, while the US ended the year with 509 MW after adding 78 MW, including two fossil–CSP hybrid plants.

CSP growth is expected to continue at a fast pace. As of April 2011, another 946 MW of capacity was under construction in Spain with total new capacity of 1,789 MW expected to be in operation by the end of 2013. A further 1.5 GW of parabolic-trough and power-tower plants were under construction in the US, and contracts signed for at least another 6.2 GW. Interest is also notable in North Africa and the Middle East, as well as India and China. The global market has been dominated by parabolic-trough plants, which account for 90 percent of CSP plants.

Concentrating technologies exist in four common forms, namely parabolic trough, dish Stirling, concentrating linear Fresnel reflector, and solar power tower.

I am thinking of making small scale steam turbine from the plans:

My approach to Parabolic Solar Concentrator

Recently purchased a small satellite dish for making a parabolic solar concentrator. The idea was to take a feel of the heat it will generate.

I pasted 1 inch square mirror pieces with resin on the dish. It took more than 03 hours to mount hundreds of them. In the morning i just brought it into sun and viola in 03 seconds it started smoldering wood and other plastic things. It was a good start:

Some more experiment and temperature monitoring yet to be done. I shall check the maximum temperature attain on the focal point and will expand this topic here.

The initial results are very promising so far.  I am surprised the abundant heat generation with this method. I am seriously thinking of using this heat.

I have an idea to make a bigger custom parabolic structure and mount flat mirrors on it.Installation of two axes sun-tracking and mounting a small boiler at the focal point. Use the generated steam to run small turbine to generate electricity.

Oh really.. should i have to design the steam turbine and fabricate it? How much steam it shall require to generate atleast 500watts of electricity from the generator? How big the parabolic concentrator to give me continuous steam for running turbine?

Can i avoid generating electricity by using steam turbine? any other way to make electricity ?

May be we able to make some simple system to harness this heat..  Thermodynamics is all about the temperature difference ;)