Homework assignment 2 Help

1
Homework assignment 2Help
2.5 m
10 m
10 m
East
North
2
Homework assignment 2 Surface energy balance
1) External wall (east) node
Ae(IdifIDIR)eastasolarAeFe-skyeeeskys(Tsk
y4 - Teast_o4) AeFe-greeegrs (Tground4 -
Teast_o4) Ae he_external (Tair_out-Teast_o)Ae
k/? (Teast_o-Teast_in)
2) Internal wall (east) node
Qsolar_to east_internal_surf AeFe-ieeeis(Tea
st_in4- Tinternal_surf4)AeFe-neeens
(Teast_in4- Tnort_in4) Ae1.823/H0.1Teast_in
-Tair_in0.291 (Teast_in-Tair_in)
Where Qsolar_to east_internal_surf portion of
transmitted solar radiation (through north side
glass) that is absorbed by internal east wall
surface
3) External glass (north) node

4) Internal glass (north) node

5) HVAC equation
QHVACQinfiltrationAe1.823/H0.1Teast_in-Tair_
in0.291 (Teast_in-Tair_in)An1.823/H0.1Tnor
th_in-Tair_in0.291 (Tnorth_in-Tair_in)
QinfiltrationACHVolume/3600?aircp
(Tair_out-Tair_in)