Electric power generation using dung bio gas.

Objective of this project is to generate electric power using bio gas.We use oil cakes and cow dung as feed for bio gas and this has worked excellently for our Bio Gas plant.

Idea:-
Idea is to generate electricity locally using dung bio gas.
This is an attempt to develop a model of producing electricity locally on small scale, and consume it within a short distance.

What is bio gas?
Bio gas is a mixture of gases, usually carbon dioxide and methane. It is produce by as a result of anaerobic decomposition of organic matter such as vegetable waste, animal waste. It is produce by a few kind of micro organism.
The active main flammable component is methane. Advantage of methane is that it dose not produce harmful carbon monoxide gas. So it is very good to use it in home.
As compare of with commercially available natural gas, Bio Gas contain a large preparation of carbon dioxide. So it is needed to remove such contain before using Bio Gas in IC engine. Process of filtration is important factor while using Bio Gas in internal combustion engine.

Approximate gases content in Bio Gas :-

1. Methane(CH4) - 66.5%
2. Carbon Dioxide(CO2) - 30.5%
3. O2+N2 - 0.5%
4. Humidity - 2.5%

(Source-Wikipedia and Chinese Bio gas manual)

COMPARISON OF CALORIFIC VALUE OF VARIOUS GASES

1. Producers gas:-1200kcal/cum
2. Landfill gas:-4000-5000kcal/cum
3. Bio Gas:- 4500-6000kcal/cum
4. Natural Gas:-6800-8000kcal/cum
5. LPG:-10000-11000kcal/cum

(Source:- Blogg by Hement Thite)

POTENTIAL BIO GAS PRODUCTION FROM DIFFERENT FEEDSTOCK

Animal Quantity kg/day Bio Gas cum/day

Cattle west 10 0.36

Buffalo 15 0.54

Pigeon 2.25 0.18

Human 0.4 0.028

Chicken 0.18 0.11

Milk Tester Updates-:

This month we have taken readings with the new program that we were given by Neil,but unfortunately I used the old circuit.I was not able to load the program in the new circuit.This month there will be more work on the circuitry and the progarm so that I can use the new circuit as well as the program to take the readings.

Low cost hearing Aid-:

The low cost was hearing aid was ready for use this month.The Circuit diagram were picked from August 2003 issue of EFY.The circuit was modified further and now can give greater clarity of voice up to 4 meters.We are testing the circuit and we will finally promote it as low cost product for village people.

The cost of the circuit is less than Rs.80 and can be very handy.The dimensions are about 7 C.M. ,4 C.M. , 4 C.M. Its weight is also very low with batteries contributing most of it. We are working further to simplify the circuit more so that assembling the circuit becomes a layman's job.

LOW COST HEARING AID

It is a unique project by FABLAB.IT has a simple circuitry that can be assembled by any one .
The cost of whole product can be less than a dollar and so it comes with great affordability to all the poor patients who dont have access to costly machines that can enhance there hearing ability.

Wind mill model using metal acrylic. It cut by laser cutter In fablab .

Students working in fablab .They makes different project . Using all machines .

Vigyan Ashram's model

All objects were cut through laser cutter .Using Qcad drawing programm.

Feature
1.It operates on 230Volt AC.
2.Low cost

3.It's power consumption is 2 watts.
4.It gives light across 180 degree.

LED project fablab india
led lamp are connected in two type's
1) 24 LED connected in series form.
2) 24 LED connected in parallel form.

*24 LED connected in series form
The one LED required 4volt.max imam and 3 LED connected in series that way total voltage is given by .
V=L1+L2+L3 Where L1 is required 4 Volt.
=4+4+4
V=12
The 3 LED connected series form and required 3 Volt.When Voltage is applied to the across the lead of the LED,and the current start to flow.
LED bulb calculated power
input voltage V=12Volt.
current I=200MA.
calculated power P=VI.
P=12V*200MA
P=2.4W

Feature
1.It has low cost .
2.Has durability one years.
3.It has required minimum power.

24 LED connected in parallel form.

It has operated 4.5V,to give the 4.5V in connected in parallel form LED,but has required some more power.
LED bulb calculated power
input voltage V=4.5Volt.
current I=600MA.
calculated power P=VI.
P=4.5V*600MA
P=2.7W

Feature
1.It's required minimum voltage
2.It has low cost .
3.Has durability one years.
4.It has required minimum power.

Sky lamp.

Sky lamp made by students .

Designs made by students .

Milk tester ­

Milk tester is a novel project of fablab India. This tester can sense the changes in milk by step impulse responce . The research and development in project till today can identify different fluids but still some work needs to be done to sense changes in milk as it is in development stage.We are taking the readings for it.