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SYNTHETIC SOLAR RADIATION STATISTICS ON CLOUDY AND SUNNY DAYS.

Author(s) : ESSENWANGER O. M., MIMS A.

Summary

A METHODOLOGY IS DISCUSSED TO OBTAIN GLOBAL SOLAR RADIATION ESTIMATES FROM CLOUD, VISIBILITY, AND TEMPERATURE ESTIMATES ARE GIVEN FOR THE ABSORPTION BY WATER VAPOUR AND CO2. THE DATA ARE FURTHER STRATIFIED BY CLOUD G THE MODEL VALUES RESEMBLE DATA OF THE DIRECT SOLAR RADIATION IN THE WINTER MONTHS AND GLOBAL RADIATION DURING SUMMER FOR THREE SELECTED URBAN AREAS. WHILE CO2 CONTRIBUTES ONLY 1% TO THE ABSORPTION, WATER VAPOUR ABSORPTION STAYS AROUND 25% AND THE CLOUD EFFECT REDUCES RADIATION BY 10 TO 20%. IT APPEARS THAT ON OVERCAST DAYS WITH HIGH CEILING, 50% OF THE SOLAR RADIATION STILL WOULD BE AVAILABLE ; ON DAYS WITH 5 TO 7 EIGHTHS CLOUD COVER, EVEN 75 TO 85%. ON OVERCAST DAYS WITH LOW CLOUDS THE AMOUNT IS REDUCED ON THE AVERAGE TO 25 TO 40%.

Details

  • Original title: SYNTHETIC SOLAR RADIATION STATISTICS ON CLOUDY AND SUNNY DAYS.
  • Record ID : 1987-0241
  • Languages: English
  • Publication date: 1985
  • Source: Source: ASHRAE Trans.
    vol. 91; n. 2B; 218-231; 6 tabl.; 28 ref.; append.
  • Document available for consultation in the library of the IIR headquarters only.

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