Heat Recovery Calculator.

Sensible Heat Recovery

air flow (cfm)
t1 (oF)
t2 (oF)
recovery efficiency

t2 - outside air temperature after the heat exchanger
t1 - outside air temperature before the heat exchanger


Total Heat Recovery

air flow (cfm)
h2 (Btu/lb.ºF)
h1 (Btu/lb.ºF)
recovery unit efficiency

h1 - enthalpy outside air after the heat recovery unit (Btu/lb.ºF)
h2 - enthalpy outside air before the heat recovery unit (Btu/lb.ºF)

Matinlang na formula ng Heat-Recovery Systems.

H = 1.08 Q (T 2 - T 1 ) η

kung saan

η = heat-recover efficiency

q = Dami ng Airflow (CFM)

H = heat transferred (btu / h)

1.08 = isang pare-pareho para sa makabuluhang mga equation ng init

T 2 = air temperatura ng labas ng hangin pagkatapos ang init pagbawi unit ( o f)

T 1 = air temperatura ng maubos na hangin bago ang yunit ng pagbawi ng init ( o f)

Kabuuang enthalpy heat recovery system formula

H = 4.5 q (h 2 - h 1 ) η

kung saan

h 2 = air entalpy ng labas ng hangin pagkatapos ang init recovery unit (btu / lbºf)

h 1 = air entalpy ng maubos na hangin bago ang init recovery unit (btu / lbºf)

4.5 = isang pare-pareho para sa kabuuang init equation

Heat Recovery Calculator.