Dual-Fluid Heat Engine Using Condensation Heat Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Internal combustion engines face inefficiency due to the wastage of pre-expansion compression heat and intermediate condensation heat, which are not utilized to enhance work output.
Innovation Solution
A method employing a two-component working fluid system where internal heat is captured and utilized through physical contact between the fluids, allowing for parallel expansion to extract work, thereby increasing engine efficiency by integrating discarded heat into the energy production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If internal combustion engine uses external combustion to maximize temperature difference, then efficiency is improved, but discarded heat from compression and expansion becomes waste energy
Solution Approach 1:
The patent captures discarded compression heat and condensation heat from the engine cycle and converts them into useful work through a secondary heat engine. The compression heat exchanger recovers heat from compressed air, and the condensation heat exchanger recovers heat from condensing vapor, both feeding into a working fluid that drives additional expansion work, thus converting previously wasted heat into beneficial output.
Solution Approach 2:
The system recovers heat that would otherwise be discarded at two critical points: during compression (via compression heat exchanger) and during condensation (via condensation heat exchanger). This recovered heat is then utilized to preheat the working fluid and drive additional expansion, ensuring that energy previously discarded is now recovered and put to productive use.
2Loss of energy
If compression heat is used for heating or energy storage, then some energy utilization is achieved, but pre-expansion compression heat and intermediate condensation heat remain unused
Solution Approach 1:
The compression heat exchanger and condensation heat exchanger perform preliminary heating of the working fluid using discarded heat before the main expansion process. This preliminary action increases the temperature and energy content of the working fluid, enabling greater work output during subsequent expansion without requiring additional external energy input.
Solution Approach 2:
The patent merges the main engine cycle with a secondary heat recovery cycle. The compression heat exchanger and condensation heat exchanger integrate heat recovery functions into the existing engine system, combining the primary work production with secondary heat utilization to create a unified system that maximizes overall energy conversion to work.
3Productivity
If two-component working fluid system is implemented to capture internal heat, then work extraction is improved, but system complexity increases
Solution Approach 1:
The working fluid system is segmented into two distinct components: a primary working fluid that undergoes the main expansion cycle, and a secondary working fluid that captures and transfers heat from compression and condensation processes. This segmentation allows independent optimization of each fluid's properties and functions while maintaining overall system efficiency.
Solution Approach 2:
The second working fluid acts as an intermediary between the discarded heat sources (compression and condensation) and the primary working fluid. It absorbs heat from these sources through heat exchangers and transfers it to the primary working fluid, enabling efficient heat capture and utilization without directly complicating the main engine cycle.
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 enhances energy efficiency by leveraging internally generated heat, reducing the need for external energy input and improving work extraction, leading to a more efficient heat engine operation.
Implementation Method 1
capturing in the second working fluid a portion of the internal heat of the first working fluid through the physical contact with each other
Implementation Method 2
separately expanding the first working fluid and the second working fluid in parallel so as to extract work from each component of the two-component working fluid
Implementation Method 3
the internal heat is implemented as condensation heat released from condensation of the second liquid working liquid
Data Source
AI summary
An improved heat engine employing a dual-component working fluid and configured to generate internal heat from one component of the working fluid that heats the other component through the physical contact between them such that together with the addition of external heat, the engine advantageously yields enhanced work extraction efficiency through separate, parallel expansion of each of the working fluids.