Supercritical CO2 Recuperator Segmentation for Multi-Source Heat Utilization

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Solution Overview

Problem

Supercritical CO2 generation systems are limited by restrictive system configurations due to the use of a single heat source, making it difficult to effectively utilize heat from multiple heat sources, which complicates the system and reduces efficiency.

Innovation Solution

A supercritical CO2 generation system is designed with multiple heat exchangers and recuperators, where each heat exchanger has a high-temperature inlet and low-temperature outlet, allowing for the efficient use of plural heat sources through the integration of high-temperature and low-temperature transfer tubes and control valves to manage fluid flow and heat exchange.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple heat sources are applied to a supercritical CO2 generation system, then heat utilization efficiency is improved, but system configuration complexity increases

Engineering Contradiction:

Improveheat utilization efficiencyVSAvoidsystem configuration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system divides the heat exchange function into multiple independent heat exchangers, each dedicated to a specific heat source. This segmentation allows each heat exchanger to be optimized for its specific heat source characteristics while maintaining overall system efficiency, resolving the contradiction between utilizing multiple heat sources and managing system complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The working fluid circulation system serves multiple functions by routing the same fluid through different heat exchangers connected in series, enabling a single circulation loop to utilize multiple heat sources effectively. This multi-functionality approach allows the system to handle multiple heat sources without proportionally increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If a single heat source is used, then system configuration is simplified, but heat utilization efficiency is reduced

Engineering Contradiction:

Improvesystem configuration simplicityVSAvoidheat utilization efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The system merges multiple heat sources into a unified working fluid circulation pathway, where heat from different sources is sequentially transferred to the working fluid through series-connected heat exchangers. This merging allows the system to maintain relative simplicity while effectively utilizing multiple heat sources, overcoming the limitation of single heat source systems.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If heat exchangers are added to utilize multiple heat sources, then power generation efficiency is improved, but system cost increases

Engineering Contradiction:

Improvepower generation efficiencyVSAvoidsystem manufacturing cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The system utilizes parameter changes in the working fluid (temperature and pressure) as it passes through different heat exchangers. By optimizing the temperature-entropy and pressure-enthalpy parameters at each heat exchange stage, the system achieves high power generation efficiency while avoiding the need for overly complex or expensive equipment configurations.

Inventive Principle:

Principle #35Parameter changes

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 configuration simplifies the system operation, reduces costs, and allows for effective utilization of various heat sources, enhancing power generation efficiency and flexibility in system design.

Implementation Method 1

plural recuperators configured to exchange heat between the working fluid passing through the turbine and the working fluid passing through the pump to cool the working fluid passing through the turbine and heat the working fluid passing through the pump

Methodology Applied

Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

plural heat exchangers configured to heat the working fluid using an external heat source

Methodology Applied

Scientific EffectHeating: Heating

Data Source

PatentUS10287926B2Supercritical CO2 generation system applying recuperator per each heat source

Publication Date: 2019.05.14 DOOSAN HEAVY IND & CONSTR CO LTD

AI summary

Disclosed herein is a supercritical CO2 generation system using plural heat sources, including: a pump configured to circulate a working fluid; plural heat exchangers configured to heat the working fluid using an external heat source; plural turbines configured to be driven by the working fluid heated by passing through the heat exchanger; and plural recuperators configured to exchange heat between the working fluid passing through the turbine and the working fluid passing through the pump to cool the working fluid passing through the turbine and heat the working fluid passing through the pump, in which the heat exchanger may include plural constrained heat exchangers having an emission regulation condition of an outlet end and plural heat exchangers without the emission regulation condition.