... energy predictions varied between 1% and 8%, again with the exception of the tandem-junction amorphous silicon modules. The large difference between measured and predicted results for the tandem-junction modules is attributed to performance degradation. Power measurements of the tandem-junction amorphous...

... by the ASME Solar Energy Division, December 19, 2002; final revision, July 17, 2003. Associate Editor: D. Berg. 19 December 2002 17 July 2003 26 11 2003 wind turbines power measurement rotational flow external flows Apart from the use in remote areas, the use of small wind...

... Energy Division, March 2002; final revision, June 2002. Associate Editor: R. Pitz-Paal. 01 March 2002 01 June 2002 27 01 2003 solar absorber-convertors solar power stations rotors power measurement flow measurement loss measurement pressure measurement velocity...