Wind resources at Horns Rev

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Table of Contents
1. SITE AND DATA ASSESSMENT......................................................................... 4
1.1 SITE DESCRIPTION.............................................................................................. 4
1.2 DESCRIPTION OF MEASUREMENTS SYSTEM ........................................................ 4
1.2.1 Primary meteorological system ................................................................ 4
1.2.2 Met back-up system................................................................................... 8
1.2.3 Sonic system............................................................................................ 11
1.3 QUALITY CONTROL.......................................................................................... 13
1.3.1 Determination of spikes.......................................................................... 13
1.3.2 Determination of signal drop-outs.......................................................... 14
1.3.3 Determination of signal stationarity....................................................... 14
1.4 DATA OVERVIEW ............................................................................................. 15
1.4.1 Directional sensitivity analysis............................................................... 15
1.4.2 Primary met system................................................................................. 18
1.4.3 Back-up met system................................................................................. 19
1.4.4 Sonic system............................................................................................ 20
2. STATISTICS .......................................................................................................... 20
2.1 WIND SPEED AND TURBULENCE....................................................................... 20
2.2 WIND DIRECTION ............................................................................................. 25
2.3 AMBIENT TEMPERATURES................................................................................ 26
2.4 WIND PROFILES................................................................................................ 29
3. 3-D MEASUREMENTS ........................................................................................ 30
3.1 SONIC MEASUREMENT SYSTEM - BASIC STATISTICS ......................................... 30
4. UPDATING RESOURCE ESTIMATES ............................................................ 34
4.1 CHARACTERISING THE LONG-TERM CLIMATE AT HORNS REV.......................... 34
4.2 RESOURCE ESTIMATES USING DIFFERENT METHODOLOGIES ............................. 35
4.2.1 Weibull method ....................................................................................... 35
4.2.2 Measure-correlate-predict (MCP).......................................................... 37
4.3 COMPARISON WITH PREVIOUS ESTIMATES ....................................................... 41
5. STABILITY AND CLIMATE.............................................................................. 42
5.1 SHEAR EXPONENT DISTRIBUTION ..................................................................... 42
5.2 DISTRIBUTION OF GUSTS.................................................................................. 43
6. WIND-WAVE-ROUGHNESS.............................................................................. 45
6.1 MARINE DATA OVERVIEW ................................................................................ 47
6.2 MARINE STATISTICS......................................................................................... 48
6.2.1 Time series plots..................................................................................... 48
6.2.2 Waves...................................................................................................... 50
6.2.3 Currents.................................................................................................. 59
6.3 NUMERICAL SIMULATIONS MODELS ................................................................. 61
6.4 RELATIONSHIP BETWEEN WAVE HEIGHT AND TURBULENCE INTENSITY............ 62
Report no.: D-160949
Tech-wise A/S is an international consulting Tech-wise A/S
engineering company specialised Kraftværksvej 53
in energy and environment DK-7000 Fredericia