Pyrheliometer
Apyrheliometeris an instrument that can measure direct beamsolar irradiance.[1]Sunlight enters the instrument through a window and is directed onto athermopilewhich converts heat to an electrical signal that can be recorded. The signal voltage is converted via a formula to measure watts per square metre.
Standards
[edit]Pyrheliometer measurement specifications are subject toInternational Organization for Standardization(ISO) andWorld Meteorological Organization(WMO) standards. Comparisons between pyrheliometers for intercalibration are carried out regularly to measure the amount of solar energy received. The aim of the International Pyrheliometer Comparisons,[2]which take place every 5 years at the World Radiation Centre[3]inDavos,is to ensure the world-wide transfer of the World Radiometric Reference. During this event, all participants bring their instruments, solar-tracking and data acquisition systems to Davos to conduct simultaneous solar radiation measurements with the World Standard Group.[4]
Applications
[edit]Typical pyrheliometer measurement applications include scientific meteorological and climate observations, material testing research, and assessment of the efficiency ofsolar collectorsandphotovoltaic devices.
Usage
[edit]Pyrheliometers are typically mounted on asolar tracker.As the pyrheliometer only 'sees' the solar disk, it needs to be placed on a device that follows the path of the sun.
See also
[edit]References
[edit]- ^"Pyrheliometer".kippzonen.com.Archived fromthe originalon April 12, 2009.
- ^"welcome to pmodwrc".April 16, 2010. Archived fromthe originalon 2010-04-16.
- ^"welcome to pmodwrc".July 2, 2007. Archived fromthe originalon 2007-07-02.
- ^"Startseite".PMOD/WRC.
External links
[edit]
Media related toPyrheliometerat Wikimedia Commons
