Page 252 - Alternative Energy Systems in Building Design
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228 PASSIVE SOLAR HEATING TECHNOLOGIES
PANEL CONNECTORS
SOLAR CELLS
FEED LINE
RETURN LINE
VACUUM BREAKER
CONTROL
BALL VALVE
FILTER AUX. HEATER
PUMP
FROM POOL TO POOL
Figure 6.6 Diagram of a roof-mounted solar pool-heating
system.
TABLE 6.1 ECONOMICS OF A TYPICAL POOL-HEATING INSTALLATION
Pool size 7500 ft 2
Pool depth 5 ft
Total purchase price $18,000
First-year energy savings $30,575 (fuel cost per therm = $1.00)
Ten-year energy savings $38,505 (estimated)
Expected investment payback 5.3 years
Yearly average return 21%
Size of each panel 50 ft 2
Number of panels 144
Total required area 7200 ft 2
Panel tilt 2 degrees
Panel orientation 180 degrees
Total required area 7200 ft 2
