§ 85-808. Geothermal energy systems., Article XXXI. Renewable Energy Systems, Chapter 85. Zoning, Land Use Legislation, Code of Ordinances, Brookhaven

Definitions.

(1)

A "closed loop system" uses buried high-density polyethylene (HDPE) plastic piping installed in drilled and grouted boreholes that conductively exchanges thermal (heat) energy with the ground via circulating water or a water/antifreeze mixture through the piping system.

(2)

An "open loop system" is a series of standard water wells that extract and use groundwater directly as a heat-exchange source then return the heated or cooled groundwater back to the aquifer.

(3)

A "direct exchange system" uses buried copper tubing that conductively exchanges heat energy with the ground via circulating a refrigerant through the tubing.

There are several types of geothermal systems, also known as "ground source heating pumps," typically used on Long Island for space heating and cooling. They include closed loop, open loop, and direct exchange systems and are distinguished by the type of ground heat exchange (GHX) installed in the earth for heat transfer.

The closed loop and direct exchange (DX) GHXs may be installed vertically in drilled boreholes or horizontally in excavated trenches then backfilled. The open loop systems are installed only in vertical drilled boreholes.

When geothermal systems are proposed in conjunction with applications for the approval of sewage disposal and water supply facilities at a particular project site, the installation is also subject to guidelines issued by Suffolk County Department of Health Services (SCDHS) regarding the installation of geothermal wells.

Geothermal energy systems shall be permitted, installed, and erected within the Town pursuant to a building permit so long as they meet the provisions of this article and all applicable sections of the Town Code. Further, no building permit shall be issued to construct a geothermal energy system until all other applicable permits have been secured. Geothermal energy systems shall be permitted only as customary accessory uses.