Solar Pool Overview
System type: Drainback solar hot water with single-loop, in-tank heat exchangers
Location: Nederland, Colorado
Solar resource: 5.5 average daily peak sun-hours
Production: 13.5 million Btu per month average (3,940 KWH/month)
Climate: Eastern Rocky Mountains, 7,913 ft. elevation; sunny, cold winters; warm summers
Percentage of hot water produced annually: 75 percent
Solar Equipment
Collectors: 14 SunEarth, Empire Series, EC40, flat plate, 4 x 10 ft.
Collector installation: Roof mounted, south-facing at a 51-degree tilt angle
Heat transfer fluid: Water
Circulation pump: Taco 0011-BF4
Pump controller: Tekmar 155
Storage
Tank: Industrial Solar Technology, custom: steel frame with rubber liner, approximately 460 gallons
Heat exchangers: Two 3/4-inch copper coils in tank to radiant heating system; one 1-inch copper coil in tank to pool
Backup DHW: Buderus L160, side-arm, 42.3 gallons
System Performance Metering
Thermometers: Two, Tekmar 155
Pressure: USG, dial, 0 to 100 psi
Radiant Floor System
Tubing: Kitec XPA
Boiler: Buderus G124
Amount of tubing: 1,900 ft.
Number of zones: Three (two in floor, one in ceiling/baseboard)
Circulation pump: Three Taco 007-F5
Pump controller: Goldline SP-30
Zone valves: Two Taco boiler/solar feeds
Other Equipment
Pool heat exchanger: 1-inch copper coil in tank; Pahlen 260 for boiler line
Valve controller: Tekmar 155
