Energy Gadgets - Gasifier Gadgets

By TamilNadu Agricultural University on 03 Feb 2019 | read
    04

1.Wood Based Down Draft Gasifier Image title

1.

Function

:

For converting Fuel wood to fuel

2.

Specification

:

 

. Capacity

:

58 kW

3.

General Information

:

Fuel consumption        :           20 to 25 kg/h
                                                             
Gas production rate    :           50 m3/h

Thermal output            :           500000 kcal/h

4.

Cost of the unit (approx)

:

Rs.1,50,000/-

5.

Salient features

:

  • Fuel wood can be used as fuel
  • 40% fuel saving due to higher thermal efficiency
  • No smoke 
  • Best suited for processing industries with steam 
  • Fulfill the heat energy requirement in rice mills, turmeric and arecanut processing units etc

2.TNAU Single Pot Improved Chulha Image title

1.

Function

:

Cooking and water heating

2.

Specification

:

i. Inner wall diameter

:

18 cm

ii. Outer wall diameter

:

24 cm

iii. Size of legs

:

5 x 5 cm

iv. Fuel inlet

:

15.5 x 15 cm

v. Fuel used

:

Wood, Agrl. Wastes, etc.

3.

General Information

:

The single pot chulha has a double wall with a gap of 2.5 cm.  It has a grate at the bottom of the combustion chamber.  Legs have been provided in the four corners of the chulha (5 cm height) as the ash can be collected below the grate.  The outer wall has two rectangular secondary air openings at the lower portion on both sides for air entry.  The inner wall has 1 cm diameter holes which maintain a triangular pitch of approximately 3 cm.  The secondary air enters through the rectangular opening in the outer wall, gets heated in the annular chamber and while moving up it passes through the holes in the combustion chamber.  The preheated air helps in proper burning of the fuel.

4.

Cost of the unit

:

 Rs. 75 /-

5.

Salient features 
Efficiency                  


:

 24%

3.TNAU Double Pot Improved Chulha 

Image title                                    TNAU Double Pot Improved Chulha

1.

Function

:

Cooking and water heating

2.

Specification

:

i. Overall dimension

:

55 x 30 x 25 cm

ii. Fuel inlet

:

15.5  x 15 cm

iii. Air inlet

:

17 x 1 cm

iv. Size and no. of legs

:

5x5 cm, 6 nos.

3.

General Information

:

The TNAU double pot portable chulha (chimneyless) is made with two walls.  Around the first pot, an annular chamber having a width of 2.5 cm is left and the outer wall is constructed.  The outer wall is also extended to cover the second pot in which case the annular chamber width is 3.5 cm, because of the smaller diameter of the second pot hole.  Two secondary air inlets are made, one on the outer wall with rectangular shape (17 cm x 1 cm) near the combustion chamber and the other at the bottom of the second pot hole with round shape having a diameter of 5 cm.  At the bottom of the first pot hole in the base, a hole of diameter 14 cm is made and a grate (C.I.) is placed over it.  For the entry of secondary air to the first pothole, 1 cm dia holes are made with a triangular pitch of 3 cm on the inner side of first pot hole and also on the tunnel projecting into the second pot hole.   

4.

Cost of the unit (approx)

:

Rs. 150 /-

5.

Salient features     

: :

Efficiency  :26%

4.TNAU Noon Meal Improved Chulha (Community Chulha) 

Image titleTNAU Noon Meal Improved Chulha (Community Chulha)

1.

Function

:

For cooking for large mass i.e. community level

2.

Specification

:

i. Feed stock   

:

Firewood, agricultural wastes etc.

ii. Fire box mouth size

:

25 x 30 cm

iii. Fuel consumption

:

5.6 kg/h

3.

General Information

:

This community model (TNAU noon meal chulha) double pot chulhas is made up of local materials such as clay, sand, paddy husk etc.  This chulha has two air inlets (6 x 9 cm) on the sides of the fire box mouth for better combustion.  Tunnels were provided to pass the flame to the second pot and carry smoke easily into the chimney pipe.  The height of the first pot hole is made lower (40 cm) than the second pot hole (48 cm) for the better propagation of flame.

4.

Cost of the unit (approx)

:

Rs. 300/-

5.

Salient features

:

 

Thermal efficiency                  :     23 %

 

Fuel saving                              :     16 %         

 

Time saving                             :     30 %


 

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