Energy, exergy, thermoeconomic analysis of a novel multi-generation system based on geothermal, kalina, double effect absorption chiller, and LNG regasification

Abstract

The current work proposes a novel CCHP system based on geothermal energy, which can generate hot water, chilled water, and power. Kalina is considered for power generation, double-effect absorption chiller cycle for cooling production, and LNG regasification cycle for thermal integration of absorption chiller and electric power generation. The hot water is generated using the heat recovery exchanger. Energy, exergy, economic, and environmental assessments are made on the proposed system to see how it can improve energy and exergy efficiency compared to the single state. Also, an environmental assessment is carried out to analyze the reduction of CO2 emission rate compared to other studies that used biomass and fossil energy sources. The findings were confirmed considering the outcomes of the previous works, and the proposed system showed remarkable performance in terms of exergy and energy efficiency, which were 85.22 % and 52.79 %, respectively. Also, the highest irreversibility exists in the LNG Regasification sector, with a ratio of 81 %. The economic estimation determined that the two parameters, total cost rate and cost per exergy, are 186.74 $/h and 8.3 $/GJ, respectively. Therefore, the innovation of the work lies in the heart of heating, cooling, and power products compared to the previous works.