Design of an Efficient Non- Separately Operated Cells Multi-Cell System

Abstract

In this work, improving the conversion efficiency (η_n ) related to a nonseparately operated cells multi-cell system is the responsibility of the way by which the system cells are electrically arranged. Optically, cells are arranged similar to the well-known multi-cell system arrangement. Electrically, cells are connected into several parallel branches, each branch consists of several series connected cells. Branch cells are chosen to as much as possible satisfy: first, equality of all currents generated in a branch; second, Equality of all parallel branch voltages. A relative comparison of the values of ηn ( multi-cell system with non-separately operated cells ) with that of the optimal one, η, ( multi-cell system with separately operated cells ) reveals the interest that may grow in the use of only single load and single controller. Theoretical calculations under air mass zero (AM0) solar spectrum and concentration ratio (X) of 103 result in an efficiency ( n  ) of up to 52.52%, 44.88% at 300K, 400K, respectively.