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Heating of lubricant with an electric resistance heater; Voiteluoeljyn laemmittaeminen saehkoevastuksella

Technical Report:

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  More>>
Authors:
Kytoe, M [1] 
  1. Technical Research Centre of Finland, Espoo (Finland). Lab. of Fuel and Process Technology
Publication Date:
Dec 31, 1992
Product Type:
Technical Report
Report Number:
VTT-TIED-1359
Reference Number:
SCA: 023000; PA: FI-92:003435; SN: 93000918044
Resource Relation:
Other Information: PBD: 1992
Subject:
02 PETROLEUM; LUBRICATING OILS; RESISTANCE HEATING; CRACKING; FOULING; BENCH-SCALE EXPERIMENTS; TEMPERATURE RANGE 0273-0400 K; CRACKS; ADDITIVES; MECHANICAL PROPERTIES; LUBRICATION; 023000; PROPERTIES AND COMPOSITION
OSTI ID:
10111544
Research Organizations:
Technical Research Centre of Finland, Espoo (Finland)
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE93752862; ISBN 951-38-4172-3; TRN: FI9203435
Availability:
OSTI; NTIS
Submitting Site:
FI
Size:
33 p.
Announcement Date:
Jun 30, 2005

Technical Report:

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}
}