Real Time Oil Concentration Measurement in Automotive Air Conditioning by Ultraviolet Light Absorption Nippondenso Company, Limited

Format:

Conference/Event

Author/Creator:

Kutsuna, Kiyoharu, author.

Conference Name:

International Congress & Exposition (1991-02-25 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1991

Summary:

A method of real time oil concentration measurment has been developed utilizing the effect of ultraviolet light absorption by lubricating oil in the liquid refrigerant line of an automotive air conditioning system. The light wavelengths from 200nm to 370nm are selected based on the ultraviolet light absorption sensitivity of the oils and refrigerants (CFC12,HFC134a).The effects of temperature,pressure and contaminantion on the absorbance of light are investigated in order to determine how these parameters affect the concentration measurement. The density changes of refrigerants are then compensated in the calculation for the oil concentration. The uncertainties of the overall concentration measurement are less than ±0.1 weight percent at 1 weight percent concentration.A transient oil circulation of the automotive air conditioner is measured by using this method

Notes:

Vendor supplied data

Publisher Number:

910222

Access Restriction:

Restricted for use by site license