Types of Loops
Most loops for residential
Exchange Systems are installed either horizontally or vertically
on the ground, or submerged in a pond or lake. In most cases,
the fluid runs through the loop in a closed system, but
the open loops may be used where local codes permit. Each
type of loop configuration has its own, unique advantages
and disadvantages as explained below:
Horizontal Ground Closed Loops:
This is the most cost effective when adequate yard space
is available and trenches are easy to dig.
Horizontal ground loops are
easies to install, while a home is under construction. However,
new type of digging equipment that allows horizontal boring
are making it possible to retrofit Geo Exchange System into
existing homes with minimal disturbance to the lawns. Horizontal
boring machines can even allow loops to be installed under
the existing buildings or driveways.
Vertical Ground Closed Loops:
This type of loop configuration is ideal for homes where
the yard space is insufficient to permit the horizontal
buildings with large heating and cooling loads, when the
earth is rocky close to the surface, or for retrofit applications
where minimum disruption of the landscaping is desired.
Vertical loops are generally
more expensive to install, but require less piping than
horizontal loops because the earth deeper down is always
cooler in summer and warmer in winter.
Pond Closed Loops:
If a home is near the body if surface water, such as a pond
or lake, this type of loop design may be the most economical.
Geo Exchange experts recommend
using a pond loop only if the water level never drops below
sis to eight feet at its lowest level to assure sufficient
heat-transfer capability. Ponds loops used in a closed system
result in no adverse impacts on the aquatic system.
Open Loop System:
This type of loop configuration is used less frequently,
but may be employed cost-effectively if ground water is
plentiful.
Open loop systems, infact,
are the simplest ways to install and have been used successfully
for decades in areas where local codes permit. Local environmental
officials should be consulted whenever an open loop system
is being considered.
Back..
|
