Abstract
In the experiment, three transmission oils with high-pressure additives and one circulation lubricant were heated with an electric resistance heater. The aim was to determine the limits of problem-free heating and to study changes in the lubricant during cracking. The lubricant is cracked and the heater coked in continuous heating of dozens of hours duration as soon as the temperature rises to 70-100 deg C. Circulation lubricant stands long-term heating at a surface effect of less than 2 W/cm{sup 2} when the temperature of the lubricant is lower than 85 deg C. The corresponding temperature limit for the gear oil is about 60 deg C. The difference is due to additives: a significant part of the foul on the surface of the resistance is due to lubricant additives. The experiment indicated that short-term heating does not result in oxidation of the lubricant or in the fouling of the heating resistance. In two-hour tests the maximum temperature of the lubricant was 80 deg C and the maximum hydrocarbon content of tank air 200 ppm. In long-term tests no coking appeared with < 300 ppm hydrocarbon contents. Heating of lubricant even at temperatures below the pour point does not cause problems. The
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Kytoe, M
[1]
- Technical Research Centre of Finland, Espoo (Finland). Lab. of Fuel and Process Technology
Citation Formats
Kytoe, M.
Heating of lubricant with an electric resistance heater; Voiteluoeljyn laemmittaeminen saehkoevastuksella.
Finland: N. p.,
1992.
Web.
Kytoe, M.
Heating of lubricant with an electric resistance heater; Voiteluoeljyn laemmittaeminen saehkoevastuksella.
Finland.
Kytoe, M.
1992.
"Heating of lubricant with an electric resistance heater; Voiteluoeljyn laemmittaeminen saehkoevastuksella."
Finland.
@misc{etde_10111544,
title = {Heating of lubricant with an electric resistance heater; Voiteluoeljyn laemmittaeminen saehkoevastuksella}
author = {Kytoe, M}
abstractNote = {In the experiment, three transmission oils with high-pressure additives and one circulation lubricant were heated with an electric resistance heater. The aim was to determine the limits of problem-free heating and to study changes in the lubricant during cracking. The lubricant is cracked and the heater coked in continuous heating of dozens of hours duration as soon as the temperature rises to 70-100 deg C. Circulation lubricant stands long-term heating at a surface effect of less than 2 W/cm{sup 2} when the temperature of the lubricant is lower than 85 deg C. The corresponding temperature limit for the gear oil is about 60 deg C. The difference is due to additives: a significant part of the foul on the surface of the resistance is due to lubricant additives. The experiment indicated that short-term heating does not result in oxidation of the lubricant or in the fouling of the heating resistance. In two-hour tests the maximum temperature of the lubricant was 80 deg C and the maximum hydrocarbon content of tank air 200 ppm. In long-term tests no coking appeared with < 300 ppm hydrocarbon contents. Heating of lubricant even at temperatures below the pour point does not cause problems. The temperature peaks at the start of heating are short-term, and no heater coking or lubricant cracking appears. Formation of an explosive mixture from the cracking products is possible only if the heater is coked very strongly, when the surface temperature under the foul rises even as high as to 300 deg C.}
place = {Finland}
year = {1992}
month = {Dec}
}
title = {Heating of lubricant with an electric resistance heater; Voiteluoeljyn laemmittaeminen saehkoevastuksella}
author = {Kytoe, M}
abstractNote = {In the experiment, three transmission oils with high-pressure additives and one circulation lubricant were heated with an electric resistance heater. The aim was to determine the limits of problem-free heating and to study changes in the lubricant during cracking. The lubricant is cracked and the heater coked in continuous heating of dozens of hours duration as soon as the temperature rises to 70-100 deg C. Circulation lubricant stands long-term heating at a surface effect of less than 2 W/cm{sup 2} when the temperature of the lubricant is lower than 85 deg C. The corresponding temperature limit for the gear oil is about 60 deg C. The difference is due to additives: a significant part of the foul on the surface of the resistance is due to lubricant additives. The experiment indicated that short-term heating does not result in oxidation of the lubricant or in the fouling of the heating resistance. In two-hour tests the maximum temperature of the lubricant was 80 deg C and the maximum hydrocarbon content of tank air 200 ppm. In long-term tests no coking appeared with < 300 ppm hydrocarbon contents. Heating of lubricant even at temperatures below the pour point does not cause problems. The temperature peaks at the start of heating are short-term, and no heater coking or lubricant cracking appears. Formation of an explosive mixture from the cracking products is possible only if the heater is coked very strongly, when the surface temperature under the foul rises even as high as to 300 deg C.}
place = {Finland}
year = {1992}
month = {Dec}
}