The World Of Weather Data

Transcription

1 Thies CLIMA assures innovation and quality in environmental sensors The World Of Weather Data Page:1

2 A closer look at Thies Clima Numbers and Facts: Founded in 1945 approx. 100 Employees Worldwide Agents and Representatives Certificated according DIN EN ISO9001:2013 and DIN ISO 14001:2005 Meteorological Instruments accepted by WMO and most of the national Weather Services Page:2

3 Product Range Measuring solutions for all Meteorological Parameters: Temperature Humidity Pressure Wind Precipitation Evaporation Special Applications Page:3

4 Thies First Class Anemometer IEC61400 & MEASNET Classified Best accuracy on the market Class A Terrain Class B Terrain All common output signals available Frequency/Analog/Digital Available with integrated self controlled heating Low Power/Voltage 3,3V) High dynamic response with 40 pulses/rotation Delay Distance <3m Classification for new IEC prepared Page:4

5 IEC Classification classes Class S for influence parameter ranges not covered by Class A or Class B. Usually parameter ranges are specific to and class number ks only valid for specified parameter range. Page:6

6 IEC Ed Classification classes Page:7

7 IEC Standard Comparison Pages Annex I+J Classes A, B + S A, B, C, D + S Sensor Type Cup Anemometer -Cup Anemometer -Ultrasonic Anemometer Assessed Samples 2 5 Free Field Comparison specified Considers Wind Direction No No Yes Yes: (Ultrasonic) Reporting Format Not specified In respect to Ultrasonic Anemometers the specific setting must be documented for which the classification is valid. Page:8

8 Anemometer Classification according to IEC Real Anemometer Classification model Anemometer model Calculation of response Anemometer Class Measurements - stationary calibration - step response - air temperature - air density - tilt response - yaw response Environmental conditions - wind (u,v,w) - turbulence intensity - temperature - air density - inclination angle - flow direction kx [k = class number] [X = class type] ka kb kc kd + ks Page:9

9 Classification Procedure Numerical integration of different equation describing the response to different wind speeds (By usage of RISÖ Software Tool) Of axis response for different tilt angles Friction changes in bearings depending different temperatures and air pressures Driving and breaking torque of the cups during rotation Inertia of the cup star (rotor) Air density All influences are measured in various wind tunnels and test platforms at Page:11

10 v(t) / v(t 20 ) The world of weather data Influence of Air temperature Not heated instrument 1, ; 40 mg; heating off 1,00 4 m/s 0,99 0,98 Class A (0 C) 6 m/s 8 m/s 0,97 0,96 Class B (-10 C) 10 m/s 12 m/s 14 m/s 0,95 Class B (-20 C) 0, T / C 15.5 m/s Page:13

11 v(t) / v(t 20 ) The world of weather data Influence of Air temperature Heated instrument 1, ; 40 mg; heating on 1,00 0,99 0,98 0,97 0,96 0,95 0, T / C 4 m/s 6 m/s 8 m/s 10 m/s 12 m/s 14 m/s 15.5 m/s Page:14

12 Influence of Air Pressure Page:15

13 Anemometer Classification according to IEC Influence of inclination angle Flow Inclination Angle Class A;C: -3 3 Class B;D: Class S: User defind Wind speed range: 4 16 m/s Tilt Measurements Range: Wind speed: 4, 8, 12, 16 m/s Tilt set up according to IEC Page:17

14 Influence of inclination angle Deviation ratio Page:18

15 Influence of inclination angle Ratio to cosines Page:19

16 Anemometer Classification according to IEC Test Setup for Distance constant determination Page:20

17 Procedure of a down step response test 0. START 1. Set certain Wind speed in tunnel. 2. Measure Anemometer frequency signal. 3. Set motor to almost equal rotation speed as anemometer. 4. Couple Anemometer to motor 5. Speed up/down Anemometer to the whished max/low speed (+- 50% of tunnel speed). 6. Release clutch 7. Measure step response of Anemometer. Page:21

18 Determination of distance constant Page:22

19 Frequency / Hz Wind speed / m/s The world of weather data Free field comparison with Ultrasonic Anemometer and two First Class Anemometer Test Setup Anemometer Wind Time / sec 5 Page:23

20 Impact of Air Pressure Not corrected output signal Page:25

21 Anemometer Classification according to IEC Improvement by air pressure correction Corrected output signal Page:26

22 Two New First Class Anemometers to meet the new IEC Standard First Class Advanced II xx.000 Conventional First Class Anemometer adapted according the new standard with frequency output First Class Advanced X xx.400 New developed intelligent First Class Anemometer with RS485 interface and outstanding new features and improve accuracy. Page:27

23 Results of IEC :2017 Classification xx.000 First Class Advantage II xx.000 : Heated xx.000 : Non Heated Conventional First Class Anemometer adapted according the new standard with frequency output Frequency Page:28

24 Result of Classification Class A (heated): A 1,8 Page:29

25 Result of Classification (not heated): A 2,3 Page:30

26 Result of Classification (heated): B 2,0 Page:31

27 Result of Classification (not heated): B 2,7 Page:32

28 Result of Classification (heated): C 1,8 Page:33

29 Result of Classification (not heated): C 4.4 Page:34

30 Result of Classification (heated): D 2.0 Page:35

31 Result of Classification (not heated): D 4,6 Page:36

32 Result of Classification (heated): S 0,9 Page:37

33 Result of Classification (not heated): S 1,7 Page:38

34 Overview of Classification Results First Class Advanced II heated Class Number 1,8 2,0 1,8 2,0 0,9 Page:39

35 Overview of Classification Results First Class Advanced II not heated Class Number 2,3 2,7 4,4 4,6 1,7 Page:40

36 First Class Advanced X xx.400 Mesured Values Windspeed Air Temperature Air Pressure Vibration/Acceleration Page:41

37 First Class intelligent Serial RS 485 Output ASCII/MODBUS RTU ID1 RS485 RS485 ID2 RS485 BUS ID3 ID4 ASCII MODBUS Data Logger or MODBUS Master Page:42

38 First Class intelligent Output correction acc. calibration Storage of correction curve consisting on 32 curve points inside the instrument. Correction of output signal according to individual Calibration Page:43

39 First Class intelligent Correction of air pressure/air desity Impact of air density to rotation speed The air pressure is measured internally in a range of 700hPa to 1100hPa. The output signal is corrected accordingly. Correced output signal according to air density. Page:44

40 Up to ID 99 The world of weather data RS485 Bus by Vane/Anemometer combination ID xx RS485 Frequency ID 01 RS485 Frequency RS485 Bus Power Page:45

41 Results of IEC :2017 Classification xx.400 First Class Advanced X xx.400 : Heated xx.400 : Non Heated Conventional First Class Anemometer adapted according the new standard with frequency output Frequency Page:46

42 Result of Classification Class A (heated): A 0,65 Page:52

43 Result of Classification (not heated): A 1,1 Page:53

44 Result of Classification (heated): B 0,9 Page:54

45 Result of Classification (not heated): B 1,8 Page:55

46 Result of Classification (heated): C 0,7 Page:56

47 Result of Classification (not heated): C 3.3 Page:57

48 Result of Classification (heated): D 0.9 Page:58

49 Result of Classification (not heated): D 3.3 Page:59

50 Overview of Classification Results First Class Advanced X heated Class Number 0,65 0,9 0,7 0,9 Page:60

51 Overview of Classification Results First Class Advanced X not heated Class Number 1.1 1, ,3 Page:61

52 Many thanks for your attention! The World Of Weather Data Page:62