Solar Thermal Electrochemical Photo Process for Energetic Molecules
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Solution Overview
Problem
Current methods for generating energetic molecules using solar energy are inefficient and do not effectively address the significant CO2 emissions from industrial processes, particularly in metal and chlorine production, as they require high energy inputs and are not scalable for widespread application.
Innovation Solution
The Solar Thermal Electrochemical Photo (STEP) process combines solar thermal energy with photovoltaic electricity to lower the electrochemical potential for electrolysis, allowing for the efficient generation of energetic molecules like carbon monoxide and hydrogen, using a heat exchanger and electrolysis chamber to capture and utilize thermal energy from solar photovoltaic components, thereby reducing the energy required for electrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional photovoltaic methods are used to generate electricity for electrolysis, then electrical energy can be produced from solar energy, but the overall energy conversion efficiency is limited and cannot achieve high solar-to-chemical conversion rates
Solution Approach 1:
The solar energy conversion process is divided into two separate stages: a photovoltaic stage that converts solar energy to electrical energy, and a thermal stage that uses waste heat from the PV cells to drive electrolysis. This segmentation allows each stage to operate at its optimal efficiency point, with the PV cells generating electricity at standard conditions while the thermal energy from their waste heat is utilized for the electrolysis process, thereby reducing overall energy loss and improving solar-to-chemical conversion efficiency.
Solution Approach 2:
The invention changes the operating parameters of the electrolysis process by using elevated temperatures provided by the PV cell waste heat. This temperature increase modifies the electrochemical potential required for electrolysis, enabling more efficient conversion of electrical energy to chemical energy. The parameter change from ambient temperature to elevated temperature operation allows the system to achieve higher overall conversion efficiencies by better matching the energy output characteristics of the photovoltaic cells.
2Productivity
If high energy inputs are used in conventional electrolysis processes, then energetic molecules can be produced, but the process requires excessive energy consumption and is not scalable
Solution Approach 1:
The invention merges the photovoltaic power generation system with the electrolysis system, combining two previously separate processes into an integrated hybrid system. The PV cells and electrolysis chamber are coupled such that the electrical output from the PV cells directly powers the electrolysis process, while the thermal waste heat from the PV cells is simultaneously utilized to elevate the temperature of the electrolysis process. This merging eliminates the need for separate energy input sources and enables scalable production of energetic molecules with reduced overall energy consumption.
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 STEP process achieves higher solar energy conversion efficiencies, up to 50%, by utilizing both visible sunlight and thermal energy, effectively reducing CO2 emissions associated with metal and chlorine production, and can be applied to various industrial processes, providing a renewable and sustainable alternative to fossil fuel-based methods.
Implementation Method 1
generating electricity from a solar electrical photovoltaic component
Implementation Method 2
using a heat exchanger and electrolysis chamber to capture and utilize thermal energy from solar photovoltaic components
Implementation Method 3
subjecting the heated electrolyzable compound to electrolysis with the solar generated electricity to generate an electrolytic product
Data Source
AI summary
A process for the production of energetically rich compounds comprising: using externally supplied thermal energy to heat an electrolyzable compound to a temperature greater than the ambient temperature; generating electricity from a solar electrical photovoltaic component; subjecting the heated electrolyzable compound to electrolysis with the solar generated electricity to generate an energetically rich electrolytic product.