ABSTRACT
Introduction to Thermal Energy Storage ......................................................... 182 Physics of Thermal Energy Storage .................................................................. 184
Sensible Heat Storage .................................................................................... 185 Sensible Heat Storage Materials .............................................................. 185
Latent Heat ...................................................................................................... 185 Latent Heat Storage via Phase Change Materials ................................. 186
Thermochemical Energy ............................................................................... 187 Thermochemical Energy Storage ............................................................ 188
Choosing Storage Method............................................................................. 188 Storage Systems ................................................................................................... 190
Two-Tank Direct Storage ............................................................................... 190 Molten Salt as Heat Transfer Fluid.......................................................... 191
Two-Tank Indirect Storage ............................................................................ 191 Single-Tank Thermocline Storage ................................................................ 192
Storage Vessel Design ......................................................................................... 192 Tank Geometry ............................................................................................... 192 Tank .................................................................................................................. 193
Materials ..................................................................................................... 193 Stress and Strain ............................................................................................. 195
Mechanical Stress ...................................................................................... 195 Thermal Strain ........................................................................................... 196
Heat Loss from Storage Vessels and Insulation ......................................... 196 Heat Loss from Cylindrical Vessels ........................................................ 196 Heat Loss from Spherical Vessels ............................................................ 198
Economics of Thermal Energy Storage Systems ............................................. 199 Peak Shaving ...................................................................................................200 Cost to Energy Provider ................................................................................200
