Biodegradable Dielectric Fluid Oxidation Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vegetable oils used as dielectric fluids in electrical equipment are susceptible to oxidation due to their chemical composition, which can lead to adverse effects on their properties, and existing solutions often require synthetic antioxidant additives that are non-biodegradable, while also facing issues with biodegradability and fire safety.
Innovation Solution
Using vegetable oils with a high oleic acid content and refining processes that conserve natural tocopherols, combined with metal deactivators like derivatives of triazole, benzotriazole, or dimercaptothiadiazole to prevent oxidation without the need for synthetic additives, creating a biodegradable dielectric fluid with enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vegetable oils are used as dielectric fluid, then biodegradability is improved, but oxidation stability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the vegetable oil by selecting specific oils with high oleic acid content (70-95%) and controlling the ratio of unsaturated to saturated fatty acids. This parameter optimization reduces susceptibility to oxidation while maintaining biodegradability, resolving the contradiction between environmental friendliness and chemical stability
Solution Approach 2:
The patent introduces natural tocopherols as intermediary antioxidant substances that protect the vegetable oil from oxidation. These tocopherols act as mediators between the oil and oxygen, preventing direct oxidative degradation while maintaining the biodegradable nature of the system, thus resolving the contradiction without requiring synthetic additives
2Stability of the object's composition
If mineral oils are used as dielectric fluid, then oxidation stability is improved, but biodegradability deteriorates
Solution Approach 1:
The patent fundamentally changes the chemical composition from petroleum-derived mineral oils to plant-based vegetable oils with specific fatty acid profiles. This composition transformation maintains adequate oxidation stability through natural tocopherols while achieving high biodegradability, resolving the contradiction between stability and environmental compatibility
3Stability of the object's composition
If synthetic antioxidant additives are added to vegetable oils, then oxidation stability is improved, but biodegradability deteriorates
Solution Approach 1:
The patent enables the vegetable oil to protect itself from oxidation through its natural tocopherol content. The oil inherently contains these antioxidant compounds that prevent oxidative degradation, eliminating the need for external synthetic antioxidant additives and maintaining full biodegradability, thus resolving the contradiction through self-protection
Solution Approach 2:
The patent uses natural tocopherols as intermediary substances that mediate between the vegetable oil and oxidative environment. These naturally occurring compounds serve as biodegradable antioxidants, protecting the oil without introducing non-biodegradable synthetic additives, thereby resolving the contradiction between stability enhancement and biodegradability preservation
4Ease of manufacture
If mineral oils are used as dielectric fluid, then cost is reduced, but fire safety deteriorates
Solution Approach 1:
The patent changes the flash point parameter from below 300°C (mineral oils) to above 300°C (vegetable oils with high oleic acid content). This parameter change achieves both improved fire safety and competitive cost, as the high oleic acid vegetable oils are derived from renewable agricultural sources, resolving the contradiction between safety and cost
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting dielectric fluid exhibits improved oxidation stability, biodegradability, and safety features, such as high fire points and low toxicity, without the use of synthetic antioxidants, meeting environmental and safety standards while maintaining low costs.
Implementation Method 1
oils with a very high oleic acid content and which conserve their natural tocopherols to a great extent have enough antioxidant power
Implementation Method 2
the problem of the acceleration of oxidation due to the catalytic activity of metals present in electrical equipment comes from the use of metal deactivators
Data Source
AI summary
The present invention belongs to the field of the insulation and cooling of electrical systems, it specifically relates to electrical equipment comprising a biodegradable dielectric fluid that is highly resistant to oxidation consisting of an oil or a mixture of vegetable oils with a very high oleic acid content which substantially conserve all their natural tocopherols and containing a metal deactivator.