You should use STOR instead of EWALL. Walls are bulky and take up space.
To use stor, place a battery by pscn. Hook the pscn to (a maximum of two particles) the stor. You may want to put swch to turn on and off.
use ppip to intermittently move heated materials to the steam generators. this way the boiler doesn't get too hot, but the heat can be used in the future :P
f=filt
p=pscn
n=nscn
m=metl
P=ppip
x=none
d=dlay
m
p d n
f f f x P P P P P P P P P P P P x f f f
!set temp delay (300~)