Download presentation

Presentation is loading. Please wait.

Published byMelissa Wilkinson Modified over 2 years ago

1
IPC-XI Tutorial Pyrgeometer

2
Contents Pyrgeometer energy balance Equations for retrieving longwave irradiance Shaded versus unshaded pyrgeometers

3
Pyrgeometer setup

4
Pyrgeometer energy balance Eppley PIR Kipp&Zonen CG4 5µm40µm20µm

5
Pyrgeometer energy balance Eppley PIR Kipp&Zonen CG4 Typical values: Net outgoing radiation ~ 100 Wm -2 PIR Dome (∆T=1K) ~18 Wm-2

6
Pyrgeometer equations Several choices for the radiometric model of a pyrgeometer: Simple Albrecht formula Extended Albrecht (PMOD) NREL formula Fit parameters

7
Calibration residuals versus WISG

8
Calibration residuals versus WISG results from 50 Instruments

9
Shaded versus unshaded Pyrgeometers

10
Shaded pyrgeometers

11
Unshaded pyrgeometers NIGHT 1 Dome YSI

12
Unshaded pyrgeometers NIGHT NIGHT and DAY

13
Unshaded pyrgeometers Proxy: direct solar irradiance 1 Dome YSI

14
Unshaded pyrgeometers Proxy: direct solar irradiance Proxy: Dome-body temperature 1 Dome YSI

15
Unshaded pyrgeometers PIR Dome proxy Direct irr proxy

16
Unshaded pyrgeometers PIR 3 Th. Dome proxy Direct irr proxy R=0.81 R=0.91 Effect is 6 W/m 2 per 1kW for this particular pyrgeometer 26955 3 dome

17
Unshaded pyrgeometers CG4 Effect is 5.5 W/m 2 per 1kW for this particular pyrgeometer cg4

18
Summary unshaded pyrgeometers InstrumentOffset per 1000 Wm -2 Direct irradiance PIR 3 Dome Thermistor7.0 PIR 3 Dome Th.6.2 PIR 3 Dome Th.6.8 PIR 3 Dome Th.7.4 PIR 1 Dome Th.11.2 PIR 1 Dome Th.15.3 PIR 1 Dome Th.11.5 PIR 1 Dome Th.4.0 PIR 1 Dome Th.8.5 PIR 1 Dome Th.11.4 PIR 1 Dome Th.4.6 InstrumentOffset per 1000 Wm -2 Direct irradiance CG42.6 CG45.4 CG43.1 CG4 CG45.3 CG45.5 CG113.4

19
Summary unshaded pyrgeometers InstrumentOffset per 1000 Wm -2 Direct irradiance PIR 3 Dome Thermistor7.0 PIR 3 Dome Th.6.2 PIR 3 Dome Th.6.8 PIR 3 Dome Th.7.4 PIR 1 Dome Th.11.2 PIR 1 Dome Th.15.3 PIR 1 Dome Th.11.5 PIR 1 Dome Th.4.0 PIR 1 Dome Th.8.5 PIR 1 Dome Th.11.4 PIR 1 Dome Th.4.6 InstrumentOffset per 1000 Wm -2 Direct irradiance CG42.6 CG45.4 CG43.1 CG4 CG45.3 CG45.5 CG113.4 Is there shortwave leakage in the solar blind filters?

20
IPC-XI Pyrgeometer intercomparison shaded unshaded Difference to WISG / Wm -2 PIR & CG4

21
IPC-XI Pyrgeometer intercomparison Difference to WISG / Wm -2 Only CG4

Similar presentations

OK

Solar UV measurements at the Agricultural University of Norway Cecilia Futsaether and Arne Auen Grimnes, Dept. of Agricultural Engineering, Agricultural.

Solar UV measurements at the Agricultural University of Norway Cecilia Futsaether and Arne Auen Grimnes, Dept. of Agricultural Engineering, Agricultural.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Sixth sense technology best ppt on robotics Ppt on video teleconferencing images Ppt on random access memory Ppt on south african culture for kids Ppt on philosophy of science Ppt on hydrogen fuel cell technology Ppt on nitrogen cycle and nitrogen fixation lightning Ppt on job rotation programs Ppt on inside our earth Ppt on exploitation of child labour