8. Components of a Geothermal
Internal portion
Geothermal heatpump unit
supplies heating or cooling
the space
External portion
Fluid is circulated through a
network of vertical bore
holes to extract/reject heat
into the ground from
heatpump unit
9. External Geothermal Field
Basement mech room – geo
pumps circulate fluid to heat
exchanger; central W/W heat
pumps deliver building fluid to
suite heat pumps
Geofield located
under building: 76
vertical holes; 560 ft
depth
Heat rejection in
summer; heat
absorption in
winter