Performance Comparison of Two Medium Temperature Packed Bed Latent Heat Storage Systems During Charging
Abstract
Two packed bed latent heat storage systems for medium temperatures are experimentally compared during charging cycles. The first storage system consists of a packed bed of spherically encapsulated eutectic solder (Sn67Pb37). The second latent heat storage is a cascaded system consisting of 20 spherically encapsulated eutectic solder capsules at the top of the storage and 20 spherically encapsulated erythritol capsules at the bottom in a storage ratio of 1:1. Sunflower Oil is used as the heat transfer fluid for the experiment tests. The cascaded latent heat shows greater values of the charging energy and exergy rate since two phase change transitions for the eutectic solder and erythritol release greater latent heat than the single PCM system.