Abstract—The power generation systems using ammonia–water mixture as working fluid are proven to be one of the feasible methods for utilizing low-grade heat sources. Since the liquefied natural gas (LNG) has a great cold energy, the performance of the power generation system can be improved if the cold energy of LNG is used as its heat sink. In this paper a comparative thermodynamic performance analysis is carried out for the combined power cycle consisted of an ammonia-water Rankine cycle with and without regeneration and a LNG power generation cycle. Based on the thermodynamic models of the combined cycle, the effects of the key parameters such as ammonia concentration and turbine inlet pressure on the system performance are extensively investigated. The results show that the thermodynamic performance of the combined power generation cycle is strongly dependent on the ammonia concentration and turbine inlet pressure.

Index Terms—ammonia-water Rankine cycle, liquefied natural gas (LNG), cold energy, regeneration

Cite: Kyoung Hoon Kim, Jae Hyeong Oh, and Hyung Jong Ko, "Performance Analysis of Ammonia-Water Power Generation Cycle Utilizing LNG Cold Energy," Jounal of Automation and Control Engineering, Vol. 3, No. 1, pp. 61-65, February, 2015. doi: 10.12720/joace.3.1.61-65