Environmental Engineering Reference
In-Depth Information
Fig. 9.4
The fourth sheet of the SLM spreadsheet
• a duration test to investigate the structural integrity and material degradation,
the quality of the environmental protection, and the turbine's dynamic behav-
iour. The duration test must take at least 6 months and consist of over 100 days
of accumulated operation. Field testing of the 500 W turbine to determine the
instantaneous blade loads and their analysis is described in Wilson and Clausen
[
8
,
9
].
• a safety and function test to investigate the control and protection system. This
might include testing the overspeed protection, emergency shutdown etc.
The standard allows the turbine's maximum yaw rate to be measured but
Equation (IEC 27) must always be used in the SLM.
9.8 Final Remarks
It is unlikely that many manufacturers of small turbines will go to the effort and
expense of certification to the IEC standard. Nevertheless, IEC 61400-2 provides a
very useful methodology for designing safe small turbines and the spreadsheet
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