α

Flue gas condensate rate

kg/kg

a

Surface blowdown rate =  m_BD/m_S,boi

kg/kg

c

Condensate accumulation rate = m_Co,ttl/m_S

kg/kg

z

Make-up water rate = m_MW/m_S

kg/kg

x

Mass fraction

kg/kg

y

Volume percent or mole percent

m³/m³