Antifreeze acceptability for ground-coupled heat pump ground loops in the United States
When designing and installing closed-loop ground-coupled heat pumps systems, it is necessary to be aware of applicable environmental regulations. Within the United States, nearly half of the states have regulations specifying or restricting the use of particular antifreezes or other fluids within the ground loop of a ground-coupled heat pump system. A number of other states have regulations pending. While all of these regulations are based on the need to preserve groundwater and/or aquifer quality, the list of acceptable antifreezes varies among those states with specified fluids. Typical antifreezes in use include ethylene glycol, propylene glycol, brines, alcohols, and potassium acetate. Each of these has its benefits and drawbacks. The status of the regulations has been determined for all of the states. An overview of the regulations is presented in this paper, along with a summary of the states` concerns.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
Journal ID: ISSN 0001-2505; TRN: IM9825%%38
- Resource Type:
- Resource Relation:
- Conference: 1998 ASHRAE winter meeting, San Francisco, CA (United States), 17-21 Jan 1998; Other Information: PBD: 1998; Related Information: Is Part Of ASHRAE transactions 1998. Volume 104, Part 1B: Symposium papers; PB: 1162 p.
- American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA (United States)
- Sponsoring Org:
- Electric Power Research Inst., Palo Alto, CA (United States)
- Country of Publication:
- United States
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; GROUND SOURCE HEAT PUMPS; USA; REGULATIONS; ANTIFREEZE; GROUND WATER