Direct use geothermal applications for brazed plate heat exchangers
Brazed plate heat exchanger were placed in three geothermal fluids (Klamath Falls, OR; Boise, ID; and Pagosa Springs, CO) to determine the effect of H[sub 2]S on braze material. Based on subsequent analysis, it appears that the rate of corrosion of the braze material is much slower than corrosion of copper tube materials in the same fluids. Minimum expected life of the heat exchangers based on these corrosion rates is reported to be 12 years in fluids of less than 1 ppm H[sub 2]S and 10 years in fluids of less than 5 ppm. Based on these expected lives, and using a 3% inflation rate and 8% discount rate, brazed plate heat exchangers are a clear economic choice in which the capital cost is 50% or less of the cost of a plate and frame heat exchanger for the same duty. Due to their single pass design, brazed plate heat exchangers are generally limited to approach temperatures of 10[degrees] or greater. Size limitations restrict applications to 100 gpm and/or 200 ft[sup 2] heat transfer surface area.
- Research Organization:
- Oregon Inst. of Tech., Klamath Falls, OR (United States). Geo-Heat Center
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG07-90ID13040
- OSTI ID:
- 6775684
- Report Number(s):
- DOE/ID/13040-T16; ON: DE93007149
- Country of Publication:
- United States
- Language:
- English
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Direct use geothermal applications for brazed plate heat exchangers
Direct use geothermal applications for brazed plate heat exchangers
Related Subjects
HEAT EXCHANGERS
CORROSION RESISTANCE
SERVICE LIFE
BRAZING
BRINES
CALIFORNIA
GEOTHERMAL FLUIDS
HYDROGEN SULFIDES
IDAHO
KLAMATH FALLS
PLATES
TESTING
CHALCOGENIDES
DEVELOPED COUNTRIES
FABRICATION
FEDERAL REGION X
FLUIDS
HYDROGEN COMPOUNDS
JOINING
KGRA
LIFETIME
NORTH AMERICA
SULFIDES
SULFUR COMPOUNDS
USA
WELDING
Geothermal Legacy
151000* - Geothermal Energy- Direct Energy Utilization