ZEMCH 2019 International Conference Proceedings April.2020 | Page 382

Nomenclature
MM
mass ( kg )
CC
specific heat ( J / kg º C )
TT
temperature (º C )
AA
surface area ( m 2 )
hh
heat transfer coefficient ( W / m 2 º C )
hh wwwwwwww
wind velocity ( m / s )
EE
electrical power ( W )
PPPP packing factor
GG
solar radiation ( W / m 2 )
ṁ
mass flow rate ( kg / s )
QQ
energy ( W )
QQ uu
useful energy gain ( W )
EEEE
EEEE oo exergy rate overall exergy gain
Greek αα ττ ŋ ŋ PPPPPP absorptivity transmissivity efficiency primary energy saving efficiency
Subscripts pp bb tt aa ff ∞ pppp ee tttt cc oo & iiii tttttt
PV cells back panel tube circulating air circulating water ambient air power plant electrical thermal collector outlet & inlet tedlar
371 ZEMCH 2019 International Conference l Seoul , Korea