Graphite Heat Storage Reducing Thermal Loss
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Solution Overview
Problem
Current technologies face challenges in efficiently storing heat energy, particularly at high temperatures, due to high energy losses and limitations in existing heat storage methods, which hinders the integration of renewable energy sources into power grids and leads to inefficiencies in electricity generation and distribution.
Innovation Solution
A method and apparatus for storing heat energy in a body of graphite by heating the inner region, minimizing energy losses through lower operating surface temperatures and using thermal insulation, allowing for efficient storage and recovery of heat energy, which can be converted back into electricity when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat energy is stored at high temperature in a conventional reservoir, then the temperature level is improved for useful work, but heat loss through conduction, convection and radiation increases
Solution Approach 1:
The patent changes the physical and chemical parameters of the storage medium by using graphite instead of conventional materials. Graphite's unique properties (high thermal conductivity, chemical stability, low emissivity) fundamentally alter the heat storage characteristics, enabling high temperature storage with reduced losses.
Solution Approach 2:
The invention uses composite construction with graphite blocks combined with reflective insulation materials and vacuum barriers. This multi-layer composite structure leverages the complementary properties of each material to achieve both high temperature storage and minimal heat loss.
2Loss of energy
If thermal insulation materials are used to reduce heat loss, then heat loss through conduction is reduced, but the complexity of the storage system increases
Solution Approach 1:
The patent applies different insulation strategies to different parts of the system. Graphite blocks provide internal thermal management, vacuum barriers address conduction and convection at critical interfaces, and reflective materials handle radiation. Each material is strategically placed where it provides maximum benefit.
3Quantity of substance
If conventional heat storage methods are used, then the storage capacity is limited, but the cost of large scale electrical energy storage becomes prohibitively expensive
Solution Approach 1:
The patent replaces conventional mechanical/electrical energy storage systems with a thermal energy storage system using graphite. This substitution enables large scale storage capacity that is more cost-effective than batteries, flywheels, or pumped hydro for certain applications.
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 effective storage and recovery of heat energy with reduced losses, enhancing the integration of renewable energy sources into power grids and improving electricity generation efficiency by utilizing high-temperature graphite storage systems.
Implementation Method 1
heating an inner region of the body of graphite when it is required to store the heat energy
Implementation Method 2
heat loss through conduction can be counteracted by the use of thermal insulation materials
Data Source
AI summary
A method of and an apparatus for storing heat energy in a body of graphite at an elevated temperature are disclosed. The method comprises heating an inner region of a body of graphite when it is required to store the heat energy and recovering the heat by way of a heat exchanger, when the energy is required to be used. The apparatus is suitable for the storage of renewable energy and electric energy obtainable from off peak periods of supply.