Numerical optimization of a solar air heating system based on encapsulated P.C.M. storage

A ransient olar etwork imulation (TSUNS) code of a solar air heating system using ock ed nergy torage (RBES) or hase hange nergy torage (PCES) is presented. Solar fraction obtained by TSUNS with RBES under Belgian climatic conditions are compared with Fchart results. The storage working times are compared between Belgiam and U.S. climates. Use of PCES in a solar air heating system provides an easy way to control over-heating. Solar fraction of such systems can be improved by suitable adjustment of parameters such as hase hange aterial (PCM) fusion temperature, latent heat and storage heat exchange properties. Comparisons between RBES and PCES (CaCl₂6H₂O) are drawn in thermal and parasitical power field.