Environmental Engineering Reference
In-Depth Information
+1°C
+1.5°C
+2°C
+3.5°C
+0°C
+1°C
FIGURE 5.14 Heating/cooling degree-days. Pro-
jected changes in heating and cooling degree-
days for: (a) four U.S. cities by global temperature
change, and for (b) the continental United States
(Based on USGCRP, 2009). A first approximation
for heating and cooling demand is provided
by estimates of projected changes in heating
and cooling degree-days (Rosenthal et al., 1995;
Amato et al., 2005). Projections of the increase
in cooling energy use range from 5% to 20% per
1°C increase in temperature for residential build-
ings and about 9 to 15% per 1°C for commercial
buildings. The relationship between cooling en-
ergy demand and temperature is nonlinear, with
greater increases in demand occurring at higher
temperatures (Wilbanks et al., 2007).
+2°C
+3.5°C
Heating Cooling Box
