Page 332 - Handbook of Energy Engineering Calculations
P. 332
FIGURE 8 Liquid-based solar space- and water-heating system.
(DOE/CS-0011.)
FIGURE 9 Air-based solar space- and water-heating system.
(DOE/CS-0011.)
The F-chart method consists of several empirical equations expressing the
monthly solar-heating fraction f as a function of dimensionless groups which
s
relate system properties and weather data for a month to the monthly heating
requirement. The several dimensionless parameters are grouped into two
dimensionless groups called the solar parameter P and the loss parameter
s
P .
L
The solar parameter P is the ratio of monthly solar energy absorbed by the
s
collector divided by the monthly heating load, or
