Chapter 3 Calculation of radiation Radiant flux(J/s, w) Radiant flux density(w/m") Radiation amount (w/md or mon) Unit conversion 1 cal= 4. 187J 1J=1Nm=2.78*107kwh=0239caI Ical/s=4.178 w lly Langley)=lcal/cm cal/cm2 min=697.8 W/n 2021/2/22 Assessment of Climate/Change Impacts 14of76Chapter 3 2021/2/22 Assessment of Climate/Change Impacts 14 of 76 Calculation of Radiation • Radiant flux(J/s, W) • Radiant flux density(W/m2 ) • Radiation amount (W/m2 d or mon) • Unit conversion 1 cal = 4.187J 1J = 1Nm=2.78*10-7kw h=0.239cal 1cal/s=4.178 w 1ly(Langley)=1cal/cm2 1cal/cm2 min=697.8 W/m2