Monitoring of a flat plate solar thermal field supplying process heat Marco Cozzini, Roberto Fedrizzi, Mauro Pipiciello, Robert Söll, Ilyes Ben Hassine and Dirk Pietruschka Renew. Energy Environ. Sustain., 1 (2016) 4 Published online: 31 May 2016 DOI: 10.1051/rees/2016004