GSHP Pumping Impacts Open Loops vs Closed Loops

GSHP Pumping analysis Used SEEM to generate loads and hours of operation Five climates run but COP and EER impacts similar Energy impacts are a function of individual home loads and climates

Heating Impacts 1Closed Loop Horizontal 4 Pipe 2Closed Loop Horizontal Slinky 3Closed Loop Slim Jim Plate HX 4Closed Loop Lake/River Coils HX 5Closed Loop Vertical U-Bend 150' Bore 6Closed Loop Vertical U-Bend 300' Bore 7Closed Loop Vertical U-Bend 450' Bore 8Open Lake or River (2 Pipe) 9Open Well Shallow Groundwater (50 ft) 10Open Avg Groundwater (150 ft) 11Open Deep Groundwater (300 ft)

Cooling Impacts 1Closed Loop Horizontal 4 Pipe 2Closed Loop Horizontal Slinky 3Closed Loop Slim Jim Plate HX 4Closed Loop Lake/River Coils HX 5Closed Loop Vertical U-Bend 150' Bore 6Closed Loop Vertical U-Bend 300' Bore 7Closed Loop Vertical U-Bend 450' Bore 8Open Lake or River (2 Pipe) 9Open Well Shallow Groundwater (50 ft) 10Open Avg Groundwater (150 ft) 11Open Deep Groundwater (300 ft)

Results Open loop pumping of ground water can result in improved performance Deep well open loops result in significant COP,EER reduction. Shallow closed loops can have an equally big effect on performance.