Design of an Improved Cooking Stove Using High Density Heated Rocks and Heat Retaining Techniques

Table 5

Comparisons between the cost of the granite rock stove and conventional stoves.

Stove Performance	Cook stove technologies
	The Granite Rock Stove	Traditional wood burning	Improved wood-burning	Traditional charcoal-burning	Improved charcoal-burning	Kerosene	Propane (LPG)	Electric	Source
Capital Cost (US$)	36		5 – 50	3 – 6	3 – 50	10 – 60	60 – 120	100 – 500	Jeuland and Pattanayak 2012
Efficiency, %, (MJ useful energy/MJ produced; Heat)	28.8	7 - 15	13 - 40	18 - 21	15 - 37	40 - 50	50 - 60