Background of the invention and prior art:
Many researches have been done researches by utilising biomass for Stirling engine applications. Conventionally Stirling engine has been used .for waste heat recovery in large scale waste heat exhaust such as large engines, boilers of power plants and cogeneration systems. Evelyn Cardozo et.al described the use of wood pellet fired burner to produce combined heat and power.

2. Massimiliano Renzi et.al studied the application of regenerative cogeneration device based on biomass combustion.

3. S. Alfarawia et al studied the performance of Stirling engine which uses exhaust heat for power generation.

4. Zhaolin Gu used super critical heat recovery process in Stirling engines.

5.Erich Podesser discussed about electricity production from biomass in rural villages.

6.Application No: 4429/CHENP/2006-Stirling Engine

7.Application No:3160/DELNP/2007-Method and system for generation of electric power using Stirling engine principles

8.Application No:4222/CHENP/2008-A wood pellet cogeneration unit with Stirling engine in condensing technology

None of the above literature or patent or any other actual product available in market at present uses chulha as a heat source in a Stirling engine system to produce electrical energy for micro power generation applications.Stirling engines are at present used only for large scale waste heat recovery and solar energy applications.This invention uses chulha for heat source to run a Stirling engine and produce electric power.

Object of the Invention:
[1] The object of this invention focuses on the application of Stirling engine for electric power production in a small chulha made of metal or clay.

[2] Another object is to utilize hot gas from the chulha is used to heat the hot cylinder of the Stirling engine while make the cold cylinder exposed to atmospheric air.

[3] A further object of the invention is to made the Stirling engine either as an integral part of the chulha or as an separate attachment and also couple the engine with a small generator to produce electrical energy to be used in a small house.

[4] One more object of this invention is to store the electrical energy produced in the generator in a battery for later use even when the chulha is not used for cooking.

[5]Yet another object of the invention is to utilise the waste heat from the chulha without any additional fuel thus increasing the efficiency of the chulha.

Statement of Invention:
This invention has a chulha made of either clay or sheet metal with a Stirling engine of alpha ,beta or gamma type made as an integral part or as a separate attachement with Chula and coupled with a electric generator to produce electric power when the chulha is used for cooking. Summary of Invention:
Traditionally the Stirling engine as a waste heat recovery device has been used for high temperature applications like boiler heat recovery, power plant heat recoveryJ.C Engines heat recovery etc. This particular invention of the Stirling Electric Chula utilizes waste heat or thermal energy from a chulha to produce electricity using a Stirling engine. The Stirling engine may be an integral part of the chulha or it may be removable type of alpha,beta or gamma configuration. The electric generator coupled with the Stirling engine flywheel produces electricity. The waste heat to electricity generation in a micro level in a house hold application will make the chulha a high technology appliance..As the chulha uses low grade energy source like biomass, generating high grade electrical energy from chulha is a promising new technology. The fact that this can be
used for any configuration like alpha,beta and gamma configurations make this invention a highly flexible in manufacturing point of view.
Brief Description of drawings:
The invention is illustrated in Drawing 1 which indicates the chulha with Stirling engine and electric, generator. It includes the chulha(l) ,combined with the Stirling engine where the hot cylinder(4) is inserted in the chulha and cold cylinder(5) is kept at atmospheric temperature outside the chulha.The flywheel(3) ,which is connected with the crank plate(6) stores the energy and reduce the energy fluctuations considerably. ' The connecting rod(7) connects the piston of hot cylinder and cold cylinder with the crank plate. The regenerator(8) placed between hot cylinder and cold cylinder in this alpha configuration increases the thermal efficiency of the system by storing thermal energy and supply it alternately to hot gas and cold gas.The entire Stirling engine and the electric generator(9) set up is placed in a base plate(2).This enable the Stirling engine set up to be removed for any maintenance or repair to enable the chulha to be used even without the Stirling engine setup.A battery(lO) is connected with the generator to store electrical energy. Drawing 2 illustrates the dimension of various components of the invention. Drawing 3 illustrates the exploded view of the invention for clear and detailed view of inner parts of the Stirling engine.

Detailed description of the invention:
The present invention describes the integration of a chulha made of either clay or sheet metal with a sterling engine ( Alpha ,Beta or Gamma Type) coupled . with a electric generator to produce electricity from a chulha(Figl-2).It can be seen from fig. 1 that the Stirling engine is assembled as an integral part of chulha or it can be assembled as an separate part whenever required and the flywheel of the Stirling engine is coupled with a generator to produce electricity. The heat from burning the fuel in the chulha produces hot gases which heat the hot cylinder of the Stirling engine.The cold cylinder is exposed to atmosphere and the temperature is maintained at atmospheric. The temperature difference between hot and cold cylinder makes the hot piston and cold piston to reciprocate inside the respective cylinders. The hot and cold cylinders are made from Stainless steel material and the hot piston is made from mild steel and cold piston

from gunmetal.The hot and cold piston connecting rods are coupled with the crank disk. The connecting rods are made from mild steel and the crank disk is made from stainless steel. The crank disk is connected with the flywheel and the arrangement of flywheel smooth out the fluctuations and provides continuous mechanical power output. Flywheel is made of Stainless steel. The flywheel is coupled with a generator which produces electricity. So the power is obtained whenever the chulha is being utilized for cooking. This electric power can be used directly for consumption or it can be stored in a battery for later usage.

We CLAIM
[l]We claim that the invented "Chulha sterling engine for power generation" produces electric energy from the hot gas waste heat from a chulha by using Stirling engine with electric generator by using the fuel used for conventional cooking purposes.

[2] We claim that he invention comprises of a earthen or metal chulha to supply the heat energy ,an alpha,beta or gamma Stirling engine to convert the thermal energy into mechanical energy by means of various linkages and a electric generator to convert to produce electrical energy from the Stirling sngine.

[3] We claim that the Stirling engine in the invention is detachable from the chulha to enable the Stirling engine to be serviced or repaired.

[4] We claim that the invention provides continuous power output even when the chulha is not being used, If it uses battery for storing excess electricity produced during the usage of chulha.

[5] We claim that the chulha efficiency has increased considerable by using this invention as the power output in the form of electricity has been taken into account for efficiency calculation.

[6] We claim that this invention converts a low grade heat energy to a high grade electrical energy in a micro level application of waste heat recovery.

[7] We claim that the invention, can be scaled up by physical size without any major difficulty and can be used for small eateries, tea shops to get low cost electric power in addition to the benefit of reduced net pollution resulting from electricity production.

[8] We claim that the entire product named "Chulha Stirling engine for power generation" is a new invention and not sold in the market or disclosed anywhere for public in open literature anywhere in the present form by the inventors as shown in fig.l