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엑서지 해석 및 핀치설계방법을 이용한 열교환망의 합성

Heat Exchanger Network Synthesis by Using Exergy Analysis and Pinch Design MEthod

HWAHAK KONGHAK, August 1992, 30(4), 406-414(9), NONE
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Abstract

본 연구에서는 열역학 제 2법칙에 기초를 둔 열교환망 합성 알고리듬을 제시하였다. 본 방법은 에너지의 열화를 의미하는 엑시지손실단위수라는 새로운 무차원군을 근거로 하여 최소 유틸리티 사용 및 최소 열교환장치수를 설계 목적으로 하고 있다. 본 합성방법을 흐름수 4-7개인 기존의 7문제에 적용한 결과, 본 방법이 간단한 손계산으로 최적 또는 최적에 가까운 열교환망을 합성할 수 있는 효율적인 방법임이 증명되었다. 따라서 열교환과 관련된 실제 공정에 있어서 본 방법이 초기설계를 제공할 수 있으리라고 생각된다.
In this study an algorithm which is based on the second law of thermodynamics is presented for the synthesis of heat exchanger netwooks. For this purpose a new dimensionless group)the number of exergy loss units) to represent the degradation of energy is defined. The design objective is to find a proper network synthesis minimizing the number of heat exchanger units required under the minimum utility consumption. By testing seven well-known standard problems dealing with 4 to 7 streams, this method proved to be efficient in generating an optimal or near-optimal structure by simple hand calculations. the present method can be used for a preliminary design of actual of actual heat exchange processes.

Keywords

References

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