
397Solar Heating and Cooling of Buildings
© 2008 Taylor & Francis Group, LLC
uid entering the collector heat exchanger is generally removed from the bottom of stor-
age. This strategy ensures that the lowest temperature uid available in the collector loop
is introduced at the collector inlet for high efciency. The energy delivery-to-load loop
contains the load device, baseboard heaters or n-and-tube coils, and the backup system
with a ow control (mode selector) valve.
7.7.2 Solar Collector Orientation
The best solar collector orientation is such that the average solar incidence angle is smallest
during the heating season. For tracking collectors ...