Organic Rankine-cycle power systems working fluids study: Topical report No. 1: Fluorinol 85. [85 mole % trofluoroethanol in water]
An investigation to experimentally determine the thermal stability limits and degradation rates of Fluorinol 85 as a function of maximum cycle temperatures was initiated in 1982. Following the design and construction of a dynamic test loop capable of simulating the thermodynamic conditions of possible prototypical organic Rankine-cycle (ORC) power systems, several test runs were completed. The Fluorinol 85 test loop was operated for about 3800 h, covering a temperature range of 525-600/sup 0/F. Both liquid and noncondensable vapor (gas) samples were drawn periodically and analyzed using capillary column gas chromatography, gas chromatography/mass spectrometry and mass spectrometry. Results indicate that Fluorinol 85 would not decompose significantly over an extended period of time, up to a maximum cycle temperature of 550/sup 0/F. However, 506-h data at 575/sup 0/F show initiation of significant degradation. The 770-h data at 600/sup 0/F, using a fresh charge of Fluorinol 85, indicate an annual degradation rate of more than 17.2%. The most significant degradation product observed is hydrofluoric acid, which could cause severe corrosion in an ORC system. Devices to remove the hydrofluoric acid and prevent extreme temperature excursions are necessary for any ORC system using Fluorinol 85 as a working fluid.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6034570
- Report Number(s):
- ANL/CNSV-TM-182; ON: DE87014604
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
42 ENGINEERING
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ORGANIC FLUORINE COMPOUNDS
DECOMPOSITION
STABILITY
RANKINE CYCLE POWER SYSTEMS
WORKING FLUIDS
AQUEOUS SOLUTIONS
GAS CHROMATOGRAPHY
HEAT RECOVERY
HIGH TEMPERATURE
MASS SPECTROSCOPY
WASTE HEAT UTILIZATION
CHEMICAL REACTIONS
CHROMATOGRAPHY
DISPERSIONS
ENERGY RECOVERY
ENERGY SYSTEMS
FLUIDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POWER SYSTEMS
RECOVERY
SEPARATION PROCESSES
SOLUTIONS
SPECTROSCOPY
WASTE PRODUCT UTILIZATION
400201* - Chemical & Physicochemical Properties
425002 - Engineering- Power Cycles- Rankine- (1980-)
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization