Solar Thermochemical Processing for Baseload Power and Fuel Production
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Solution Overview
Problem
Conventional concentrated solar power (CSP) systems have a limited capacity factor due to their reliance on direct sunlight for electricity generation, making them unsuitable for baseload power and requiring innovative methods to store energy effectively.
Innovation Solution
A solar thermochemical processing system that utilizes high-temperature heat from solar concentrators to drive endothermic and exothermic reactions, converting solar energy into chemical energy stored in products like methanol and syngas, which can be used for electricity generation and fuel production even without direct sunlight, employing micro- and meso-channel reactors and heat exchangers for efficient energy conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CSP systems use concentrated solar energy to drive heat engines for electricity generation, then electricity can be produced when direct sunlight is available, but the capacity factor is limited to 20-25% and baseload power generation is not achievable
Solution Approach 1:
The system performs preliminary action by using concentrated solar energy to drive endothermic reactions that store energy in chemical bonds during periods when sunlight is available. The chemical products (such as syngas, methanol, or hydrocarbons) serve as energy carriers that can be stored and later converted to electricity or fuel during periods without sunlight, thereby extending operational duration and increasing capacity factor.
Solution Approach 2:
The invention changes the energy storage parameter from thermal energy (sensible or latent heat) to chemical energy stored in molecular bonds. This parameter change enables long-term storage without energy degradation and allows the system to operate during periods without direct sunlight by converting the stored chemical energy back to electricity through combustion or chemical reactions.
2Duration of action of stationary object
If solar energy is stored as sensible or latent heat, then energy can be stored for later conversion to electricity, but storage duration is limited and energy degradation occurs over time
Solution Approach 1:
The system changes the storage medium parameter from thermal energy (heat) to chemical energy (molecular bonds). Chemical energy storage in the form of fuels or chemical intermediates does not degrade over time like thermal energy storage, allowing for long-term storage without significant energy loss. The chemical products can be stored at ambient temperatures, further reducing energy degradation.
3Adaptability or versatility
If CSP systems are designed for electricity generation only, then the system structure is simple, but the system cannot provide fuels for other markets and has limited versatility
Solution Approach 1:
The system achieves multi-functionality by using the same concentrated solar energy input and chemical reaction infrastructure to produce multiple products including electricity, fuels (such as methanol, hydrocarbons), and chemical intermediates (such as syngas). This universal approach allows the system to serve multiple markets including power generation, transportation fuels, and chemical feedstocks, thereby increasing adaptability without proportionally increasing complexity.
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 system enhances the capacity factor of CSP systems by enabling baseload power generation and efficient storage of solar energy as chemical energy, achieving high solar-to-chemical energy conversion efficiencies and reducing carbon dioxide emissions through effective carbon utilization.
Implementation Method 1
A solar thermochemical processing system is disclosed, in accordance with one embodiment of the present invention. The system includes a first unit operation for receiving concentrated solar energy, using heat from the solar energy to drive the first unit operation
Implementation Method 2
The first unit operation is an endothermic reactor... using heat from the solar energy to drive the first unit operation, wherein the first unit operation also receives a first set of reactants and produces a first set of products
Implementation Method 3
The second unit operation is an exothermic reactor... for receiving the first set of products from the first unit operation and for producing a second set of products
Implementation Method 4
The system also includes a third unit operation for receiving heat from the second unit operation to produce a portion of the first set of reactants
Data Source
AI summary
A solar thermochemical processing system is disclosed. The system includes a first unit operation for receiving concentrated solar energy. Heat from the solar energy is used to drive the first unit operation. The first unit operation also receives a first set of reactants and produces a first set of products. A second unit operation receives the first set of products from the first unit operation and produces a second set of products. A third unit operation receives heat from the second unit operation to produce a portion of the first set of reactants.