IrvingG

Dear all, We are developing a wind farm nearby an Existing Wind Farm (Expansion project, acquired from the previous owner) with taller, larger rotor WTG We will install a measurement point for this new expansion (to measure nearer to HH and locations of the new WTGs) However, the measurement will be wake impacted by the operating wind farm from certain wind direction sectors. Any advice on best practices for this case? Can we use the measurement data to create reliable WRG? Can the wake losses from different HH (new vs existing WTGs) be modeled properly? Thank you in advance for your inputs and advices.

Dear WAsP forum, I am analyzing a few sites in the tropics on flat terrain farming land, i.e. not complex terrain. It fits with WAsP, but I am not sure if some parameters need to adjustment (especially may be the heat flux offset and RMS values). Our masts have temperature and wind speed measurements at multiple heights. It suggests slightly unstable condition. The default RMS and offset heat flux values in WAsP are based on European climates. The tropics are hotter than Europe. Has someone got experiences in this? In the DTU report 462000 Planning and Development of Wind Farms:Wind resource assessment using the WAsP software, by Niels G. Mortensen, pp.21-22, the heat flux was modified for a site in South Africa (subtropics). The modified heat flux offset of -10 Wm-2 still suggests stable region. Has WAsP need applied for hotter climate, and especially in unstable atmosphere? Many thanks and regards, Irving