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Evaluation and Optimization of the Annual Performance of a Novel Tri-Generation System Driven by Geothermal Brine in Off-Design Conditions

Chair of Engineering Thermodynamics and Transport Processes (LTTT), Center of Energy Technology (ZET), University of Bayreuth, 95440 Bayreuth, Germany
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Appl. Sci. 2020, 10(18), 6532; https://doi.org/10.3390/app10186532
Received: 25 August 2020 / Revised: 11 September 2020 / Accepted: 17 September 2020 / Published: 18 September 2020
(This article belongs to the Special Issue New Trends in Enhanced, Hybrid and Integrated Geothermal Systems)
The difference in heating or cooling to power ratio between required demands for district networks and the proposed tri-generation system is the most challenging issue of the system configuration and design. In this work, an adjustable, novel tri-generation system driven by geothermal resources is proposed to supply the thermal energies of a specific district network depending on ambient temperature in Germany. The tri-generation system is a combination of a modified absorption refrigeration cycle and a Kalina cycle using NH3-H2O mixture as a working fluid for the whole tri-generation system. A sensitive analysis of off-design conditions is carried out to study the effect of operational parameters on the system performances prior to optimizing its performance. The simulation show that the system is able to cover required heating and cooling demands. The optimization is applied considering the maximum exergy efficiency (scenario 1) and minimum total exergy destruction rate (scenario 2). The optimization results show that the maximum mean exergy efficiency in scenario 1 is achieved as 44.67% at the expense of 14.52% increase in the total exergy destruction rate in scenario 2. The minimum mean total exergy destruction rate in scenario 2 is calculated as 2980 kW at the expense of 8.32% decrease in the exergy efficiency in scenario 1. View Full-Text
Keywords: tri-generation; off-design analysis; ammonia-water solution; geothermal; flexible demand production; optimization tri-generation; off-design analysis; ammonia-water solution; geothermal; flexible demand production; optimization
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MDPI and ACS Style

Akbari Kordlar, M.; Heberle, F.; Brüggemann, D. Evaluation and Optimization of the Annual Performance of a Novel Tri-Generation System Driven by Geothermal Brine in Off-Design Conditions. Appl. Sci. 2020, 10, 6532. https://doi.org/10.3390/app10186532

AMA Style

Akbari Kordlar M, Heberle F, Brüggemann D. Evaluation and Optimization of the Annual Performance of a Novel Tri-Generation System Driven by Geothermal Brine in Off-Design Conditions. Applied Sciences. 2020; 10(18):6532. https://doi.org/10.3390/app10186532

Chicago/Turabian Style

Akbari Kordlar, Mehri, Florian Heberle, and Dieter Brüggemann. 2020. "Evaluation and Optimization of the Annual Performance of a Novel Tri-Generation System Driven by Geothermal Brine in Off-Design Conditions" Applied Sciences 10, no. 18: 6532. https://doi.org/10.3390/app10186532

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