Heat-Driven Compressed Air Plant with Integrated Expansion
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Solution Overview
Problem
Existing compressed air production methods involve multiple energy conversion steps, leading to energy losses and reduced performance, and are not efficiently integrated with industrial thermal processes.
Innovation Solution
A plant that uses a heat source to drive the production of compressed air through a single thermodynamic cycle, incorporating a compression unit, heating apparatus, expansion unit, and transmission apparatus to minimize energy conversion steps and leverage excess industrial heat, operating on an open cycle with no external power generation or user unit power withdrawal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple energy conversion steps are used to produce compressed air from heat, then the compressed air can be produced, but energy losses increase and overall performance decreases
Solution Approach 1:
The patent merges the compression and expansion operations into a single integrated plant where the expander directly drives the compressor through a mechanical connection. This eliminates intermediate energy conversion steps (such as converting thermal energy to electrical energy and then to mechanical energy), reducing energy losses and improving overall efficiency.
Solution Approach 2:
The patent implements a continuous thermodynamic cycle where heat is continuously added to the working fluid, which then continuously expands to drive the compressor. This continuous operation minimizes energy losses compared to discrete, intermittent energy conversion steps.
2Reliability
If a single plant integrates heat-driven compressed air production, then reliability and cost advantages are achieved, but the system complexity must be managed
Solution Approach 1:
The patent combines multiple functions (heat addition, expansion, compression) into a single integrated plant with a unified thermodynamic cycle. This reduces the number of separate systems and interfaces, thereby improving reliability while managing complexity through functional integration.
3Loss of energy
If excess heat is recovered from industrial processes, then energy efficiency improves, but integration with thermal processes requires careful design
Solution Approach 1:
The patent enables the system to use its own waste heat (from the compression process or ambient sources) to drive the expansion process, creating a self-sufficient thermal cycle. This self-service approach to heat recovery minimizes external integration requirements while maximizing energy efficiency.
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 significantly reduces energy losses and enhances efficiency in compressed air production, integrating well with industrial thermal processes and reducing environmental impact.
Implementation Method 1
a heating apparatus (5) configured to receive a first portion of such compressed air (B), to heat such first portion of compressed air (B) with heat from a heat source, and to eject heated compressed air (D)
Implementation Method 2
an expansion unit (3) configured to receive such heated compressed air (D), to expand such heated compressed air (D), and to eject expanded air (E)
Implementation Method 3
a compression unit (2), which is configured to receive air to be compressed (A), to compress such air to be compressed (A), and to eject compressed air (B), (C)
Data Source
Figure 1~1A
Figure 2
Figure 3
AI summary
The present invention relates to a plant (1) for producing compressed air, for exploitation by a user unit, from a heat source. The plant (1) comprises a compression unit (2) which withdraws in air to be compressed from the environment (A) and generates compressed air (B, C). A first portion (B) of this compressed air is sent to the heating apparatus (5) where it is heated by the heat source, and then is transferred to the expansion unit (3) as heated compressed air (D). The expansion unit (3) expands the heated compressed air (D), thereby generating as much mechanical power as is required to be transmitted to the compression unit (2). The remaining second portion (C) of compressed air (B, C) is withdrawn by a user conduit (6) and transferred to the user unit (13) as the target product.