Solar Hot Water
Section of solar hot water system at the Convent of the Sacred Heart Athletic & Wellness Center.
Solar hot water systems use solar radiation to heat water year-round for domestic use.
+ Can offset a large portion of utility costs
+ More efficient than photovoltaic systems
+ Zero emissions
+ Zero energy use
CHALLENGES AND OPPORTUNITIES
+ Higher initial costs compared to conventional water heating systems
+ Incentives exist to offset initial cost, such as NYSERDA’s “PON 2149” program, which offers rebates up to $4,000 for residential and $25,000 non-residential (Expires:12/31/15)
Systems with ‘evacuated tube collectors’ are most efficient. Each glass or metal pipe containing heat transfer fluid is surrounded by a larger glass tube. The tube shape is ideal for the collection of solar energy. Light reflects within the tube, heating the fluid. The fluid then passes through a heat exchanger, which transfers the heat to the domestic water supply. The non-freezing fluid then cycles back to the collectors. These collectors work well in overcast conditions and operate in temperatures as low as -40°F.
Convent of the Sacred Heart Athletic & Wellness Center
New York, NY
53,000 square feet
Bright ‘n Green Condominiums
Robert Scarano Architect
6,500 square feet
Solar Thermal (Hot Water) Resources
NY State Energy Research and Development Authority
NYC Solar Water Heating Roadmap
The City University of New York