RF Antenna Array for Uniform Heating of Oil Sands
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Solution Overview
Problem
Conventional heating methods for bituminous ore, oil sands, tar sands, and heavy oil are inefficient and environmentally unfriendly due to high water usage and non-uniform heating, which complicates processing and extraction, as these materials are not readily heated by conventional means.
Innovation Solution
An RF antenna array system that generates a specific ratio of magnetic and electric near fields to efficiently heat materials by connecting loop and dipole antenna sections to an RF power source, optimizing the heating of materials through tailored electromagnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heating methods are used to heat bituminous ore, oil sands, tar sands, and heavy oil, then the materials can be heated, but the heating is non-uniform and requires large amounts of water and energy
Solution Approach 1:
The patent replaces conventional mechanical/thermal heating systems with an RF electromagnetic heating system. The RF antenna array generates electromagnetic fields that directly induce currents in the material, converting electromagnetic energy to thermal energy internally within the material, achieving uniform and efficient heating without requiring large amounts of water or external heat transfer media
Solution Approach 2:
The patent adjusts RF heating parameters including frequency, power level, and antenna configuration to optimize heating efficiency. By controlling the RF field parameters and material properties, the system achieves rapid and uniform heating while minimizing energy consumption and water usage
2Temperature
If conventional heating methods are used to heat bituminous ore, oil sands, tar sands, and heavy oil, then the materials can be heated, but water usage is excessive and environmentally unfriendly
Solution Approach 1:
The patent replaces water-based heating systems with direct RF electromagnetic heating. The RF energy directly heats the material through dielectric heating and induced currents, eliminating the need for large amounts of water as a heat transfer medium and reducing environmental impact
Solution Approach 2:
The RF heating system enables self-heating of the material by inducing internal currents that generate heat directly within the material volume. This self-service heating mechanism eliminates the need for external water injection and heat transfer systems, significantly reducing water consumption
3Productivity
If conventional heating methods are used, then heating can be achieved, but processing efficiency is limited due to non-uniform and slow heating
Solution Approach 1:
The patent replaces slow conventional thermal conduction heating with rapid RF electromagnetic heating. The RF fields penetrate the material and induce currents throughout the volume simultaneously, achieving rapid and uniform heating that dramatically reduces processing time and increases productivity
Solution Approach 2:
The RF heating system provides continuous and simultaneous heating throughout the material volume rather than sequential surface-to-core heating. This continuous action throughout the entire material volume accelerates the heating process and improves processing efficiency
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
This approach enables efficient and uniform heating of bituminous ore, oil sands, tar sands, and heavy oil, reducing water usage and energy consumption while enhancing processing efficiency and environmental sustainability.
Implementation Method 1
RF heating is heating by exposure to RF energy. The nature and suitability of RF heating depends on several factors. RF energy is accepted by most materials but the degree to which a material is susceptible to heating by RF energy varies widely.
Implementation Method 2
RF heating of a material depends on the frequency of the RF electromagnetic energy, intensity of the RF energy, proximity to the source of the RF energy, conductivity of the material to be heated, and whether the material to be heated is magnetic or non-magnetic.
Data Source
AI summary
An apparatus for heating a material that is susceptible to RF heating by an RF antenna array. The apparatus includes a source of RF power connected to an antenna array having a plurality of loop antenna sections connected to each other by dipole antenna sections wherein the loop antenna sections and dipole antenna sections create a magnetic near field and an electric near field such that the ratio of magnetic field strength to electric field strength is approximately a predetermined value. Material is heated by the apparatus by placing the material in the near fields of the antenna array and creating magnetic near fields and electric near fields that approximate a ratio that is predetermined to efficiently heat the material and connecting the antenna array to an RF power source.