
540 Principles of Sustainable Energy Systems
© 2008 Taylor & Francis Group, LLC
Using the LCR method allows a basic design of passive system types for the 94 refer-
ence systems and the resulting annual performance. A bit more design variation can be
obtained by using the sensitivity curves of Figure 9.10 to modify the SSF of a particu-
lar reference system. For instance, a direct gain system SSF of 0.37 would increase by
approximately 0.03 if the mass area-to-glazing area ratio (assumed 6) were increased
to 10 and would decrease by about 0.04 if the mass area-to-glazing area ratio were
decreased to 3. This information provides a designer with qu ...