Solar Air Heaters with Thermal Heat Storages

Table 1

Thermal properties of some commonly used thermal storage materials.

TES	Specific heat	Thermal conductivity	Density	Latent heat of fusion
Rock bed	1	3.26	2240	—
Brick	790	0.90	1920	—
Concrete	840	0.79	1600	—
Pebble bed	0.8 kJ/kg K	2.9 W/m K	1430 kg/m^3	—
Paraffin wax	2.1–8.4 kJ/kg K	24.06 × 10^−2 W/m K	920–795 kg/m^3	189 kJ/kg
Hytherm oil	0.73	0.97	725	—
Glauber’s salt	2.5	2.25	1330–1460	251
Organic PCM	2	—	800	190
Inorganic PCM	2	—	1600	230
Granular carbon	0.93	0.11	460	—
Water	4178	0.612	998	334
Al composites	0.89	0.21 kJ/ms K	2707	—
Iron gravels	0.56	37	7200	—