Actuator Band Heat Engine for Low-Temperature Power Generation
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Solution Overview
Problem
Existing systems are inefficient in utilizing low temperature heat and temperature differences in natural thermal storages for electric power generation, limiting the use of renewable energy resources and contributing to environmental pollution.
Innovation Solution
A heat engine with actuator band arrays and a heat switching mechanism that cyclically exposes the bands to heat, causing cyclic displacement of a work output member to generate mechanical power, which is then converted into electrical power using an electric power generation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat engines are used for power generation, then high temperature differences are required, but low temperature natural thermal storages cannot be utilized
Solution Approach 1:
The patent changes the operating temperature parameter by using materials with high thermal expansion coefficients that can respond to small temperature differences. The actuator bands are made from materials that expand significantly even at low temperature changes, enabling the heat engine to operate with natural thermal storages that have low temperature differences.
Solution Approach 2:
The patent directly utilizes thermal expansion of actuator bands as the working principle. The actuator bands expand and contract in response to temperature changes, converting thermal energy into mechanical motion. This allows the system to harvest energy from low temperature differences in natural thermal storages without requiring high temperature gradients.
2Loss of energy
If heat pipes are used for waste heat recovery, then efficient heat transfer is achieved, but low temperature waste heat cannot be used for electric power generation
Solution Approach 1:
The patent introduces actuator bands as an intermediary between the heat pipe and the power generation mechanism. The actuator bands convert thermal energy from the heat pipe into mechanical motion, which then drives the power generation system. This intermediary enables the conversion of low temperature waste heat into electrical power, bridging the gap between efficient heat transfer and power generation capability.
Solution Approach 2:
The patent replaces conventional high-temperature mechanical power generation systems with a thermal expansion-based mechanical system. Instead of using steam turbines or combustion engines that require high temperatures, the system uses thermally actuated bands that can operate at low temperatures, enabling waste heat to be converted into mechanical and then electrical energy.
3Use of energy by moving object
If fossil fuels are used for energy requirements, then abundant energy supply is achieved, but environmental pollution and global warming occur
Solution Approach 1:
The patent enables the system to harvest energy from the surrounding environment itself, using natural thermal storages and temperature differences that already exist in nature. The heat engine utilizes ambient thermal energy without requiring external fuel input, making the system self-sufficient and eliminating the need for fossil fuel combustion, thereby avoiding environmental pollution and greenhouse gas emissions.
4Object-generated harmful factors
If renewable energy resources are used, then environmental impact is reduced, but higher costs and irregular availability occur
Solution Approach 1:
The patent creates a universal heat engine system that can operate with various thermal energy sources, including natural thermal storages, waste heat, solar thermal energy, and geothermal sources. This multi-functionality allows the system to adapt to different environments and conditions, providing consistent energy production regardless of the specific renewable source available, thereby improving productivity and energy availability consistency.
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 heat engine effectively converts low temperature thermal energy into mechanical power for electric power generation, reducing reliance on fossil fuels and providing a cost-effective solution for global warming by utilizing natural thermal energy sources.
Implementation Method 1
a first actuator band array operatively connected to the work output member and adapted to displace the work output member in a first direction in response to heat exposure. The operating mechanism also includes a second actuator band array operatively connected to the work output member and adapted to displace the work output in a second direction in response to heat exposure
Data Source
AI summary
A heat engine is provided. The heat engine includes a chassis, a work output member, and an operating mechanism for operating the work output member. The chassis supports one or more heat engine components, including the work output member. The work output member is adapted to generate and output mechanical power to an electric power generation system for generating electrical power. The operating mechanism includes a first actuator band array and a second actuator band array connected to displace the work output member in a first direction and a second direction, respectively, in response to heat exposure. A heat switching mechanism is operable to cyclically expose each of the first and second actuator band array to heat to cause cyclic displacement of the work output member in the first and second direction for generating the mechanical power.