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

Table 1

Thermal design assumptions for the cooking stove.

No-	Material	Parameter	Units	Values	Reference
1	Fuel (carbonised agro-waste briquettes)	Calorific value	MJ/kg	21.7	Kiwana, 2016
2	Charcoal	Calorific value	MJ/kg	29.8	Kiwana, 2016
3	Water	Density	g/ltr	1000	Global Alliance for Clean Cookstoves, 2014
4	Water	Specific heat capacity	J/g.K
5	Granite rock	Thermal conductivity	W.m^−1. K^−1	2.68	Eppelbaum, 2014
6	Air	Thermal conductivity	W.m^−1. K^−1	0.02	Lienhard IV, 2000
7	Stainless steel	Thermal conductivity	W.m^−1. K^−1	16	Young, 1992
8	Glass wool	Thermal conductivity	W.m^−1. K^−1	0.04	Young, 1992
9	Flame	Theoretical Maximum temperature	K	2123	Yusuf, 2011
10	Cook stove	Theoretical thermal efficiency	%	35
11	Cook stove	Energy loss	%	65