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논문 기본 정보

자료유형
학술대회자료
저자정보
최형원 (고려대학교) 정재희 (고려대학교) 강용태 (고려대학교)
저널정보
대한설비공학회 대한설비공학회 학술발표대회논문집 대한설비공학회 2022년도 하계학술발표대회 논문집
발행연도
2022.6
수록면
731 - 737 (7page)

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The solar-assisted absorption chiller is integrated with the thermal energy storage tanks to implement elongated operation with solar energy as well as to complement the incompatibility of the time gap between the cooling load of the building and the supply of renewable energy source. In this research, the thermal energy storage capacity and the operating characteristics of the system merging a single-effect absorption chiller employing water-lithium bromide as a working fluid and three thermal energy storage tanks were investigated. This system transforms the solar thermal energy into the chemical potential of water-lithium bromide solution to store the thermal energy and has the advantage of not requiring insulation of the thermal energy storage tank. Numerical investigation has been conducted to analyse the ratio between the mass flow rate of refrigerant to absorption chiller and that of thermal energy storage tank, which has been set as a key parameter to optimize the system performance. Based on the data of the cooling load of the residential building in July, which requests the largest cooling load, the feasibility study of energy management plan is conducted to establish the optimization of system performance. The regenerated water vapor is condensed to be supplied to absorption chiller for producing the cooling effect during the daytime and the rest is stored in the refrigerant storage tank to response to the cooling load during the night. This supply ratio of refrigerant is the significant parameter to optimize the operation of the system according to the specific cooling load of the building. Based on a hotel with cooling area of 30 m2, the optimized thermal energy storage density is estimated of 106.7 kWh/m3. The optimal cooling capacity of the evaporator of the absorption chiller is 2.2 kW at the ratio of thermal energy storage of 0.53, which means 53% generated refrigerant should be stored to effectively relieve the cooling load without solar energy. Simultaneously, the maximum thermal energy storage density is estimated of 216.4 kWh/m3, and that of the cooling capacity of the evaporator of absorption chiller is 4.46 kW.

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Abstract
1. 서론
2. 수학적 모델
3. 기준 분석 및 비교 결과
4. 결론
References

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