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논문 기본 정보

자료유형
학술대회자료
저자정보
서기정 (중앙대학교) 김소연 (중앙대학교) 정민규 (중앙대학교) 양현민 (중앙대학교) 김민성 (중앙대학교)
저널정보
대한설비공학회 대한설비공학회 학술발표대회논문집 대한설비공학회 2023년도 동계학술발표대회 논문집
발행연도
2023.11
수록면
262 - 265 (4page)

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초록· 키워드

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Steam is an essential heat transfer medium with a latent heat exchange of over 2000 kJ kg<sup>-1</sup> and is widely used in various industrial sectors. However, high-temperature and high-pressure steam is produced through gas boilers in facilities like combined heat and power (CHP) plants, and this process must be improved to achieve the 2050 carbon-neutral goals. This study focuses on modeling the application of a Steam Generation Heat Pump (SGHP) to the energy-intensive process of paper production, with the aim of utilizing waste heat for steam production. The application of SGHP is a crucial endeavor, not only for achieving carbon neutrality but also for pursuing economic benefits. Designing the appropriate heat pump is important, depending on the amount of waste heat available. While many studies have utilized refrigerants with high critical points, such as HFC-245fa, these have raised concerns due to their high Global Warming Potential (GWP). As an alternative refrigerant, HCFO-1224yd(Z) has been selected. The modeling process unfolds as follows: First of all, the quantity of waste heat is calculated through an energy balance assessment, and the associated energy was determined. Subsequently, SGHP modeling is conducted within the Matlab programming environment. Assuming constant Log Mean Temperature Difference (LMTD), the heat exchanger size is determined, employing the Secant Method as a numerical analysis technique. With the sizes of the evaporator and condenser fixed, an analysis of the heat pump's performance concerning the evaporator size is carried out. SGHP performance is evaluated based on the Coefficient of Performance (COP), steam production rate, compression work, Evaporator heat transfer rate and Condenser heat transfer rate. It is observed that as the evaporator size ratio increases, the compression work continues to rise, while the other three variables exhibit a point of inflection. Applying these results to the previously conducted energy balance allows for the identification of the optimal cycle in terms of energy cost savings.

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Abstract
1. 서론
2. 연구방법
3. 연구결과
4. 결론
References

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