Internal Olefin Base Oil for Low-Viscosity Refrigerating Machine Oil
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Solution Overview
Problem
Existing refrigerating machine oils face challenges in reducing friction coefficient while maintaining low viscosity, which affects energy efficiency and oil film stability.
Innovation Solution
A base oil comprising a specific olefin with a carbon-carbon double bond in an internal position, derived from renewable biomass resources, is used to formulate a refrigerating machine oil, optionally combined with hydrocarbon oils and additives to enhance friction reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the viscosity of refrigerating machine oil is lowered to reduce stirring resistance and improve energy efficiency, then energy efficiency is improved, but the oil film stability in sliding portions deteriorates
Solution Approach 1:
The invention changes the chemical structure parameter of the base oil from conventional α-olefins to internal olefins with carbon-carbon double bonds at specific positions (not at the terminal position). This structural parameter change enables the oil to maintain effective lubrication film formation even at lower viscosity grades (VG 3 or more and 8 or less), thereby resolving the contradiction between energy efficiency improvement through viscosity reduction and oil film stability maintenance.
2Force
If the viscosity of refrigerating machine oil is lowered to reduce stirring resistance, then stirring resistance is reduced, but the friction coefficient increases due to poor oil film maintenance
Solution Approach 1:
The invention modifies the molecular structure parameter of the base oil by using internal olefins where the carbon-carbon double bond is positioned internally rather than at the terminal position. This structural modification enables the oil to achieve lower viscosity (reducing stirring resistance) while simultaneously maintaining adequate friction protection through improved oil film characteristics, thus resolving the contradiction between reduced stirring resistance and maintained friction coefficient.
Data Source
AI summary
A base oil for a refrigerating machine oil comprising an olefin represented by the following formula (1): wherein R1 represents an alkyl group, one of R2 and R3 represents an alkyl group, and the other of R2 and R3 represents a hydrogen atom or an alkyl group.