Racetrack Closed-Loop Ground Heat Exchangers - Bosch Geothermal Heat Pumps Applications Manual

Applications Manual Bosch Geothermal Heat Pumps | 83
11.4 Racetrack Closed-Loop Ground Heat
Exchangers
Another type of horizontal closed-loop application that is
popular in moderate to colder climates is the "racetrack"
loop (Fig. 89, 90). Typically, all of the pipes used and
installed are at the same elevation in a much larger
trench, or even a large pit area (Fig. 91). This method
is often more cost effective than installing four and six
pipe horizontal designs as the depth of the frost line in
moderate and/or colder climates is deeper than warmer
climates, resulting in more dif culty when excavating. The
distance between pipes is typically around one (1) foot.
Fig. 89
Fig. 90
Fig. 91
Bosch Thermotechnology Corp.
Data subject to change