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Monday, May 30, 2011

DENMARK'S FLAG IS GOING TO FLY HIGH BY WIND POWER - a revolution

          Denmark set itself as a role model for the whole world on implementing renewable energy and reducing carbon emission. when we go through what Denmark actually did, they found the correct resource which is available in plenty in their country and utilized them properly. Currently Denmark's generation capacity from wind power is around 25-30%. Germany is way ahead in wind power generation by installing wind turbines every day. England and U.S(which planned to get 30% of total demand from wind) are also heading towards mass production of electricity from wind power.

WIND TURBINE
          Although Denmark is not at the top of wind power generation countries list, they were setting an example to other countries by planning to produce 50% of their total demand from wind power. If they do so they will be the first country to become highly eco friendly. They were also working on making peoples to use electric cars and to further reduce the carbon emission. An island in Denmark called Samso have enough wind turbines to supply the whole island with 10% surplus in hand. The achievement in this island is that every turbine is owned by the local peoples in that island.

LARGE NUMBER OF TURBINES INSTALLED
TO FORM WIND FARM


          I'm not really flattered just because of the Denmark's plan of "50% from Wind". I really amazed by the Denmark's electricity export ability. Although Denmark is a small country, it is holding one third of the world wind power industry.  I also feel proud to be an Electrical Engineer. The reason is that you can't send the wind power to neighboring countries just because you got plenty of them, but you can send any energy to any area by changing them into "Electricity". While living in a country where there is a plenty of "Electricity Scarcity" with 3-5 hours power cut a day(now there is no current in my town, thank god i got my laptop), Denmark really looks like a role model in utilizing the resources we have without disturbing our eco system. I believe that Denmark's wind power will never let their flag down.

Saturday, May 28, 2011

PIEZOELECTRIC ENERGY HARVESTER FROM VIBRATIONS - A MODULE FOR INDUSTRIAL APPLICATION

          This project is just an example of Vibrational Energy Harvesting. We can give whatever the vibrational source available as input. Also, here we are storing the obtained power it can be used for any purpose. If you want to eliminate battery then no problem just with the help of proper power conditioning circuit you can directly connect the obtained power to load. But make sure the continuous source of vibration before eliminating battery.

THIS IS THE BLOCK DIAGRAM FOR THE PIEZOELECTRIC ENERGY HARVESTER
FROM VIBRATIONS

THIS IS THE SET UP FOR UTILIZATION OF HARVESTED POWER

APPLICATION OF VIBRATIONAL ENERGY FROM ANY
VIBRATING SOURCE


AFTER THE APPLICATION OF VIBRATION THE INDICATOR GLOWS
INDICATING THE POWER GENERATED


NOW THE GENERATED POWER IS STORED IN BATTERY AFTER PROPERLY
CONVERTING IT INTO DC 

POWER FROM BATTERY IS GIVEN TO LOW POWER SENSOR - THERMISTOR




THEN THE POWER FROM BATTERY IS SUPPLIED TO LDR



FINALLY SUPPLYING IRDA

PIN CONFIGURATION FOR IRDA

THE NEXT THREE PICTURES SHOWS THE CONTROLLING OF SENSORS 





INTERFACING CIRCUIT OR CONNECTION DIAGRAM


video
OUTPUT OF THE PROJECT



CURRENT(ELECTRICITY) FROM COW DUNG - REDUCE THE CARBON EMISSION UP TO 8%

        "Do you know the fact that the amount of methane released by the cow's around the world is almost than that emitted by the vehicles that uses fossil fuels(car, train, flights, etc) all around the world". Methane is the most dangerous greenhouse gas that traps the heat in our atmosphere as 20 times that of CO2. They remain in atmosphere for around 15 years. Now, there is a way for every one of us to reduce the carbon emission without spending a cent. Yeah, becoming a vegetarian is the solution but are we ready to be a vegetarian. "NO", i can hear the answer hidden inside most of you. Then how we could reduce the carbon emission. Just collect the cow dungs. 
        It is not a hard job i think so. As it will be a routine in a farm to collect the cow dung to keep the farm clean. Collecting the cow dung from the farms all around us is simple and low cost. This collected cow dung is then stored in a large tank where it is mixed with proper algae or fungi for the process of biological fermentation. In this part the micro-organisms take care of everything for the generation of electricity.

THOUSAND YEAR OLD METHOD OF TURNING
COW DUNG INTO FUEL

       Although in India cow dung is dried and used as one of the primary domestic fuel for the production of heat. The high carbon emission from directly burning them makes it risky and we cannot fully utilize the energy. At this time we are left with two choices. The first choice is turning into vegetarian which most of us don't even try. The second choice is supporting the bio plants or building one of our own. If we start utilizing the whole of the cow dung all around the world we can reduce the carbon emission by 8% which will be a great achievement.

Friday, May 27, 2011

MAKING 50 WATT BULB FROM 2 LITER BOTTLE - ADVANCED CHEAPEST SOLAR ENERGY HARVESTER

           Reading the title most of may think that this is a geek's corner. Actually making a 50 watts bulb from a  2 liter soda plastic bottle doesn't really need a bit of the technical knowledge in any stream. All it needs is just a 2 liter bottle(plastic or glass, plastic bottles are highly recommended while concerning safety), 2 lids full of bleach and a camera film dispenser. If you have all these then you are ready to do solar energy harvesting and you are going to build the cheapest solar energy harvester.

WATER BOTTLE'S(CHOOSE 2 LITER BOTTLE)



   Start building the harvester by filling the 2 liter bottle with water and two lids full of bleach. Now close the bottle and close the lid with camera film dispenser for protection of lid. That's it now you made a solar energy harvester which produces light energy equivalent to 50 watts bulb. No complex procedures, no costly items required and finally to technical knowledge required. But to fit this light in your home you need a hole on your roof where this 2 liter bottle can fit with 20% of bottle from lid side should be outside the roof. Also the other disadvantage of this method is you can't store the light energy in battery during day time and use that at night time as in conventional solar panel's method.


            This method also has no maintenance problems with last longing plastic bottles.
    
            Here is a video showing how much light can be produced from this method which will surprise every one of you. Surely after seeing this video you will try to make one.

video

Wednesday, May 25, 2011

FUTURE MOBILE POWER GENERATION - HARVESTING FROM VIBRATIONS USING PIEZOELECTRIC MATERIALS


          With the recent advances in wireless and micro electro mechanical systems technology, the demand for portable electronics and sensors is growing rapidly. Because these devices are portable, it becomes necessary that they carry their own power supply. In most cases this power supply is the conventional battery; however, problems can occur while using batteries because of their finite lifespan. For portable electronics, replacing the battery is problematic because the electronics could die at any time and replacement of the battery can become a tedious task. Supplying power through a long cable can be impractical, hard to install and maintain. Advances in integrated circuit manufacturing and low power circuit design have reduced the total power requirements of a sensor node to well below 1 mW.

           The sensor network systems provide new services based on the information in the real world. Sensor nodes, which constitute terminals of a sensor network system, measure the environment, such as temperature and humidity. Power consumption of wireless communication is large, so intermittent operation is effective in reducing power consumption. Consequently, sensor nodes have achieved average power consumption on the microwatt order. However, we still have a problem of maintenance cost to change battery manually of every distributed sensor node. 
ADVANCED NANO MATERIAL WHICH PRODUCES ELECTRICAL POTENTIAL
BY THE PIEZOELECTRIC PRINCIPLE
            Therefore, the power-free sensor nodes that scavenge its energy from ambient environments (mainly industries) and need no battery are strongly desired. There have been many approaches for ambient-energy scavenging technologies that use solar energy, thermal energy, and environmental vibration energy, of all these scavenging technology from vibration is quite useful. It can be applied for the sensor nodes that monitor the problems of the industrial machines such as machines, motors or monitor the circumstances in the busy traffic roads. However, conventional scavenging technologies from environmental vibration have not yet achieved to supply stable power for continuous operation of sensor nodes. The scavenged powers have reached in 100 microwatt order, but the sensor nodes require 10 mW order power instantly.
           For this reason, conventional scavenging technologies are used as a supporting battery that enhance the lifetime of the main battery. In this project, we describe a completely power-free sensor node or low power electronic device that works under small vibration energy scavenged from industrial machines with no battery. The energy harvester consists of a piezoelectric resonator or Piezoelectric Sensors(click here for Piezoelectric Ceramics: Principles and Applications) for a vibration-to-electric energy converter, and a power control circuit that store scavenged current charge to supply instant power.

Monday, May 23, 2011

TIDAL POWER - SO PROMISING FUTURE

             Got "Shocked", but not by electricity just by hearing the amount of electricity that can be generated by tidal energy as the source but with a huge investment(that may give shock to most of the investors). Why "TIDAL"? you may ask. Tidal energy sounds more interesting when we think of why we need to invest a huge amount of money for tidal and why not for other renewable's. There exists a big explanation for it.


     Tidal power generation has lot of disadvantages associated with it like High Initial Capital Investment, Limited Locations, It's Effect on Marine Life, Long Gestation Time, Difficulty in Transmission of Tidal Electricity, Weather Effects(storms and typhoons), etc. When considering advantages like No Fuel, Long Life, High Energy Density, High Load Factor attracts big investors(Siemens and Vatten fall) toward it and it's Predictable nature, Renewable, Non-Polluting and Carbon Negative gets the most of the governments attention towards it.

     The Danish government spent £1.3 billion to establish onshore wind, which currently brings £2.7bn per year in revenue. A properly capitalized wave and tidal sector could create 43,500 direct jobs and generate a potential £4.2bn per year in revenue for the  UK economy - a report says.


     


     Renewable UK’s State of the Wave and Tidal Industry report, released at the conference, states that the UK is still leading the world with the largest installed wave and tidal generating base of 2.4 MW, a further 27 MW with planning consent, 77.5 MW of projects in planning, and 700 MW expected in the Pentland Firth area by 2020.
     In total, Renewable UK forecasts 1-2 GW of wave and tidal energy installations in the UK by 2020. Then installing tidal power in India not only helps the unemployment problems out here but also can supply the uninterrupted power to the whole nation(in Tamil Nadu there is daily power cut for 3-5hrs and so on in other states may fade out) when we utilize the most of the tidal energy available here. Finally tidal power sounds so promising.

Saturday, May 21, 2011

REDUCING POWER(ELECTRICITY) LOSSES WITHOUT ANY TECHNICAL KNOWLEDGE!!!!!

            "To utilize 1KW of electric energy(electricity) we need almost 2KW of equivalent input power"- it means we are utilizing power that can power us for two centuries in just a century(100 years). It may surprise many of the normal peoples but adding an another KW of the input power to 2KW for getting just a KW of power at the consumer side does not surprise any of the electrical engineers(especially in India). This is due to the fact that the electrical engineers know how much losses there exists in the normal electricity generating stations and in transmission/distribution networks.


        Instantly you may rise a question "Why don't the Engineers and Scientists work on it and get a solution to reduce the losses?". This question may sound right but what actually they were doing is working on it and they were reducing the loses bit by bit using new technologies. They need lot more years to take care of these losses, certainly we can reduce some losses right from this moment. "How can we?" you may ask and my answer to this is "JUST SAVE ELECTRICITY".
        Yeah, just wasting the electricity also adds up with the losses of electricity. If i am right then we can also reduce the losses without even having a bit of technical knowledge about electricity. All we got to do is just SWITCH OFF the things that consumes electricity when it is not in use, no matter what it is. 



I know how the peoples in India are suffering from Electricity or Power scarcity(because i'm too suffering from that). But most of the Indians were not concerned about energy conservation. All i could imagine is if we don't save the Electricity right now(with fast depletion of natural resources and vast development of industries)  we may give our descendants a dark life as gift.
 I think it is the time to change the inefficient electrical appliances with new efficient ones and start conserve electricity.