Fiber optics refractometer for absorption machines

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5815898

Bostick, D A; Klatt, L N; Perez-Blanco, H

Monitoring solution concentration in lithium bromide absorption units is of great importance to improve the thermal efficiency and the controllability of the units. The conventional way to measure concentration in lithium bromide water absorption machines is by means of refractometers. This technique requires the extraction of a sample from the machine. In situ, real time measurements are then difficult, and implementing control strategies is impossible. The fiber optic refractometer described in this work is capable of monitoring concentration in situ, giving instantaneous readings. The device consists of light sources, light detectors, and fiber optics with a surface treatment that enables them to measure the index of refraction of the solution. The instrument is described and results showing its usefulness presented. 3 refs., 8 figs., 2 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5815898
• Report Number(s): CONF-8710194-1; ON: DE88002296
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
ABSORPTION
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
BROMIDES
BROMINE COMPOUNDS
CHEMICAL COMPOSITION
DISPERSIONS
FIBER OPTICS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
LITHIUM BROMIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
MEASURING INSTRUMENTS
MIXTURES
REFRACTION
REFRIGERANTS
SOLUTIONS
WORKING FLUIDS