Status of Hexis SOFC Stack Development and the Galileo 1000 N Micro-CHP System

Abstract

Hexis is developing the micro-CHP SOFC-system Galileo 1000 N. Field tests with the Galileo 1000 N were started and at present 17 systems are installed in the field. Additional 13 systems are installed at Hexis' labs. In a system test with improved cells, an electrical power output of more than 1000 W (AC, net), an electrical efficiency of more than 40% (DC) and 36% (AC, net) could be achieved, while another test showed a total efficiency of more than 90% (LHV). One of the lab systems runs now for more than 15000 h with a power degradation rate of 1.9% per 1000 h. A 5-cell stack with a similar setup is running for more than 15000 h with a voltage degradation of approx. 1% / 1000 h, while a more recent test showed less than 0.5% / 1000 h degradation for 9000 h. In the field, a system has been operated for more than 7200 h until now. It was shown that 5-cell stacks can tolerate more than 12 full redox-cycles.