Dynamic Simulation and Performance Enhancement Analysis of a Renewable Driven Trigeneration System

Renos Rotas, Petros Iliadis, Nikos Nikolopoulos, Ananias Tomboulides and Elias Kosmatopoulos
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Renos Rotas: Chemical Process and Energy Resources Institute, Centre for Research and Technology Hellas, Egialeias 52, Maroussi, 11525 Athens, Greece
Petros Iliadis: Chemical Process and Energy Resources Institute, Centre for Research and Technology Hellas, Egialeias 52, Maroussi, 11525 Athens, Greece
Nikos Nikolopoulos: Chemical Process and Energy Resources Institute, Centre for Research and Technology Hellas, Egialeias 52, Maroussi, 11525 Athens, Greece
Ananias Tomboulides: Laboratory of Applied Thermodynamics, Department of Mechanical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Elias Kosmatopoulos: Department of Electrical and Computer Engineering, Democritus University of Thrace, 67100 Xanthi, Greece

Energies, 2022, vol. 15, issue 10, 1-27

Abstract: Research activity in the field of combined cooling heating power (or trigeneration) systems with high renewable energy source (RES) contributions has increased rapidly over the last few years, in line with the European Union legislation about energy communities. However, technical challenges arise regarding the synergetic, sustainable and optimal integration of RES in local energy systems. In the present study, the operation of a trigeneration system located in the student residences of Democritus University of Thrace in Greece is examined. The system involves a combination of highly promising renewable and storage technologies, including solar thermal energy and biomass for heat generation, hot water tanks for thermal energy storage, absorption refrigeration for cooling, along with Organic Rankine Cycle and photovoltaic systems for electricity generation. System modeling and simulation have been implemented in Dymola environment with the use of Modelica equation-based modeling language. The accuracy of the model response has been validated against available measurements. Specific design and control measures have been proposed, simulated in a transient fashion and evaluated in terms of (i) RES generation, (ii) solar fraction and (iii) temporal flexibility. The measures examined, including the placement of a Li-ion battery, resulted in an increase of 24.6% in the heating demand solar contribution and of 7.9% in the renewable energy generated for the electricity demand, over the examined periods.

Keywords: combined cooling heating power; renewable energy; energy storage; dynamic simulation; lithium-ion battery; Dymola; Modelica (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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