Principles, calibration, and process experience for a new laser aerosol detector system
A new type of laser particulate detection instrument has proved extremely valuable in the design and monitoring of oil removal systems for cryogenic refrigeration systems. When located at the inlet of a refrigerator, any aerosol or particulates that could be harmful to the operation of the refrigerator would be detected. Its main features include: in situ measurement of particulates in the high pressure helium continuous monitoring with alarm capabilities which permits automatic shutdown of attended or unattended systems, sensitivity down to a few parts per billion, long-term stability on the order of 10 ppB, and straightforward data interpretation. The concept of continuous automatic calibration and baseline zero adjustment relieves the operator of any manual adjustments or loss of confidence in the signal levels recorded. The 1-second response time allows instant turnoff if the filters experience an oil breakthrough or if an operator inadvertently opens bypass valves around the oil removal system. The stripchart recording allows for long-term comparison of particulate levels to determine if a buildup is occurring and its rate of buildup. It will also aid in predicting the amount of contaminants frozen out in the refrigerator and the operating time remaining before refrigerator shutdown and warmup is required. 8 figures.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA); Process Particulate Monitors, Inc., Knoxville, TN (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 6386464
- Report Number(s):
- BNL-25018; CONF-781110-4
- Resource Relation:
- Conference: 71. meeting of the AICHE, Miami, FL, USA, 12 Nov 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AEROSOLS
MONITORING
REFRIGERATORS
CALIBRATION
HELIUM DILUTION REFRIGERATION
LASERS
LUBRICATING OILS
APPLIANCES
COLLOIDS
COOLING
DISPERSIONS
ELECTRIC APPLIANCES
GAS APPLIANCES
LUBRICANTS
PETROLEUM PRODUCTS
REFRIGERATING MACHINERY
REFRIGERATION
SOLS
440300* - Miscellaneous Instruments- (-1989)