Phase 1 feasibility study: district heating and cooling using wastewater effluent and sea water in Olympia, Washington
The feasibility of district heating and cooling (DHC) using low-temperature hydrothermal sources in conjunction with heat pumps has been assessed on a preliminary basis for downtown Olympia and the Capitol Campus. The conclusion is that DHC can provide thermal energy at approximately 75 to 85% of the lowest competing fuel cost in the community. Three potential hydrothermal sources for DHC were evaluated: treated wastewater effluent from the LOTT plant; surface water from Capitol Lake or Budd Inlet; and waste process water from the Olympia Brewery. LOTT effluent and Budd Inlet sea water were both found to be favorable sources, possessing heat pump output potentials far in excess of the service area's heating or cooling demands. Capitol Lake was found to be an unfavorable source because its maximum potential as a heat pump source falls below the service area's thermal demands. The Olympia Brewery was also eliminated because its waste heat was likewise insufficient to meet winter demands, and it requires a costly transmission pipeline to the service area. However, it should be noted that at some point in the future the Brewery could become a DHC customer if its large demand for conventionally-fueled process heat becomes too costly.
- Research Organization:
- VBB Allen, Salem, OR (USA)
- DOE Contract Number:
- FG01-85CE26530
- OSTI ID:
- 5776875
- Report Number(s):
- DOE/CE/26530-T1; ON: DE86009594
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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