열역학 제2법칙에 의한 이중관 대향류 열교환기의 해석

Abstract

비압축성유체를 작동유체로 하고 뜨거운 흐름은 직렬이고 찬 흐름은 병렬로 된 이중관 대항류 열교환기에 대한 성능을 열역학 제1법칙적 관점과 제2관점에서 이론적 및 실험적으로 해석 하였다.

주어진 열교환기 형상과 입구조건에 대하여 펌핑동력에 대한 열교환량 및 엔트로피 생성율을 찬 흐름분율, 유량비열, 입구온도비에 대하여 계산하고 실험치와 비교하였다.

아울러 찬 흐름측을 직렬로 하였을 경우의 값들과도 비교하였다.

The performance of the double pipe counterflow heat exchanger which uses an incompressible fluid as a working fluid and is connected in series on the hot side and in parallel on the cold side, was analysed both theoretically and experimentally in the view of 1st and 2nd law of thermodynamics.

The ratio of heat transfer rate to pumping power and the rate of entropy generation for the given geometry of the heat exchanger and inlet conditions, were calculated and compared with the experimental results for the cold side fraction, the ratio of capacity rate, and the ratio of inlet temperatures of both sides.

In addition, the ratio of heat transfer to pumping power and the rate of entropy generation were compared with those values of the case connected in series on the cold side.

The performance of the double pipe counterflow heat exchanger which uses an incompressible fluid as a working fluid and is connected in series on the hot side and in parallel on the cold side, was analysed both theoretically and experimentally in the view of 1st and 2nd law of thermodynamics.

The ratio of heat transfer rate to pumping power and the rate of entropy generation for the given geometry of the heat exchanger and inlet conditions, were calculated and compared with the experimental results for the cold side fraction, the ratio of capacity rate, and the ratio of inlet temperatures of both sides.

In addition, the ratio of heat transfer to pumping power and the rate of entropy generation were compared with those values of the case connected in series on the cold side.