Solar Thermal

High Temperture Example:
Building 209, EPA Lab, Edison NJ
• Three closed loop systems with
evacuated tube collectors, heat
exchanger in the preheat tank.
Food-grade Propylene Glycol
solution for freeze protection.
– Bay F 80 gallon preheat tank and 20
ft 2 of collector area.
– Bay B 80 gallon preheat and 40 ft 2 of
collector area
– Bay D 120 gallon preheat tank and
90 ft 2 of collector area , measured
output averaged 50,000 Btu/day in
December, 98.
• Total Cost=$26,000, 15 yr
payback