Heat Transfer of Phase Change Material-Water Slurry Flowing through Spiral-Channel CompactHeat Exchanger

摘要

Double-spiral-type equipment is proposed as a new compact heat exchanger. Initially, the behaviorof heat transfer coefficients is quantitatively determined through experiments of the heat exchangebetween hot and cold water flows in the exchanger. Subsequently, the heat-recipient water is changedwith phase change material (PCM)-water slurry to ascertain the effects of PCM-melting on heattransfer enhancement through direct measurements of heat transfer rates. By appropriately evaluatingthe physical properties of the slurries with PCM-melting, we finally propose a heat transfer correlationwhich is applicable to both the water and slurry flows.