DSM Pocket Guidebook Volume 5: Renewable and Related ... - NREL

windows varies throughout the country. It could be as much as 20% of
the floor area in sunny cold climates, where advanced glozings or
moveable insulation ore recommended to prevent heat loss at night.
These buildings hove high insulation levels and added thermal moss
for heat storage.
PROJECTED AREA The net south-facing glozing area projected on a
vertical plane.
SUN TEMPERING A sun-tempered building is elongated in the
east-west direction, with the majority of the windows on the south side.
The area of the windows is general hmited to about 7% of the total
floor area. A sun-tempered design has no added thermal moss beyond
what is already in the framing, wall board, and so on. Insulation levek
ore generally high.
THERMAL STORAGE WALLS (MASONRY OR WATER) Athermal
storage wall is a south-facing wall that is glozed on the outside.
Solar heat strikes the glozing and is absorbed into the wall, which
conducls the heat into the room over time. The walls ore at least 8 in
thick. General, the thicker the woll, the less the indoor temperature
fluctuates .
• APPLICABILITY
FAOUTY TYPE Primarily new residential construction. Because most
passive solar design components ore on integral port of the building,
application is best suited to new construction. Retrofiffing is generally
limited to adding a greenhouse or a sunspoce.
CUMATE Passive solar design is applicable to all dimate zones. The
optimal passive solar system size varies by locotion and is shown in
Figure R-29. Figures R-30, R-31, and R-32 show the annual savings
from solar for different system types. The sizes ore based on the
assumption that the building is well-insulated.
DEMAND-SIDE MANAGEMENT STRATEGY Strategic conservation,
lood shifting.
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