Performance of a Pebble Bed Thermal Storage Integrated with Concentrating Parabolic Solar Collector for Cooking

Table 2

Bench mark experimental data [9] and calculated results.

Parameters	Nomenclature	Values	Unit
Porosity		0.38	[−]
Length of the storage	L	0.9	[m]
Diameter of the storage	D	0.3	[m]
Optimum diameter of pebbles		0.02	[m]
Mass flow rate		0.0495	[Kg/s]
Inlet/outlet pipe diameter		0.05	[m]
Thickness of stainless steel of the storage stack	S	0.002	[m]
Pebble specific heat capacity		880 50	[J/kgk]
Pebble thermal conductivity		2.5	[W/mk]
Density of absorber		2940	[kg/m^3]
Specific heat capacity of absorber		1194	[J/kgK]
Inflow temperature		355	[°C]
Over all heat transfer coefficient		0.4	[W/m^2k]