An approach to monitor solid phase ratio of solid/liquid mixture for cold energy storage and transfer systems

A novel solid phase ratio sensor system for solid/liquid mixture to apply cold energy storage and transfer is presented. Phenomena, such as light transparent in the liquid, extinction in the solid and scattering on the solid surface, are applied for this sensor system. The sensor system consists of a solid state laser diode, a CdS photo sensor and a conversion table of the solid phase ratio and the optical transmittance or CdS resistances. From the experiments, it is confirmed that the presented sensor system is useful for monitoring the solid phase ratio.