Pinegar Solar Hot Water System Tech Specs

Overview

System type: Antifreeze, evacuated-tube solar hot water

Location: Springfield, Missouri

Solar resource: 5 average daily peak sun-hours

Annual production: 8 million Btu

Percentage of DHW produced annually: 60% to 70%

Equipment

Collector: 30-tube, Apricus

Collector installation: Roof-mounted, oriented to true south, tilted at latitude (37°)

Heat transfer fluid: Rhomar HD propylene glycol

Circulation pump: Caleffi solar pump station model 255060, with integrated Wilo Star 16

Pump controller: Watts Solar

Storage

Tanks: Heat Transfer Products, SSU-80, 80 gal., dual-coil

Heat exchanger: Integrated in tank

Backup DHW: Electro Industries, 6 kW wall-hung boiler for the radiant heating system; 40-gal. electric tank for DHW; The Superstor tank preheats the DHW and supplies radiant from the upper coil.

System Performance Metering

Thermometer: Watts Solar Controller with heat-metering function and data logging

Flow meter: Integrated with Caleffi solar pump station

Pressure: Integrated with the Caleffi solar pump station