Physical System Description
The physical system of SWHS, as shown in Fig:Tank, includes the following elements:
PS1: Tank containing water.
PS2: Heating coil at bottom of tank. (qC represents the heat flux into the water from the coil.)
PS3: PCM suspended in tank. (qP represents the heat flux into the PCM from water.)
Figure: Solar water heating tank, with heat flux into the water from the coil of qC and heat flux into the PCM from water of qP