TY - GEN
T1 - Evaluation of Plant Configurations for Geothermal Trigeneration Systems with Organic Rankine Cycles
AU - Schifflechner, Christopher
AU - Kaufmann, Florian
AU - Irrgang, Ludwig
AU - Kuhnert, Lara
AU - Dawo, Fabian
AU - Wieland, Christoph
AU - Spliethoff, Hartmut
N1 - Publisher Copyright:
© 2021, Knowledge Center on Organic Rankine Cycle Technology (KCORC). All Rights Reserved.
PY - 2021
Y1 - 2021
N2 - Due to the expected increasing importance of cooling applications within the next decades, geothermal trigeneration systems might be of high interest in the future. This work aims at evaluating different plant layouts against the background of more advanced plant configurations and part load behavior. Four different plant configurations are analyzed for a geothermal heat source with a temperature of 130 °C and a mass flow rate of 140 kg/s. The highest net power output is achieved by an advanced serial-parallel configuration. With an annual net power production of 25.91 GWh, the power output is between 2 and 42 % higher compared with the other three configurations (parallel, serial and serial-parallel). The application of a recuperator within the ORC system has a significant impact on the serial concepts, but only marginally increases the power output of the parallel layouts. Depending on the plant configuration, there is an optimal desorber temperature of the absorption chiller. In case of serial concepts, the desorber temperature affects only the brine reinjection temperature, but not the ORC net power. For serial concepts, an optimal desorber temperature between 65 and 70 °C is revealed. Finally, the results highlight the importance of considering part load effects when evaluating the annual performance of geothermal trigeneration systems.
AB - Due to the expected increasing importance of cooling applications within the next decades, geothermal trigeneration systems might be of high interest in the future. This work aims at evaluating different plant layouts against the background of more advanced plant configurations and part load behavior. Four different plant configurations are analyzed for a geothermal heat source with a temperature of 130 °C and a mass flow rate of 140 kg/s. The highest net power output is achieved by an advanced serial-parallel configuration. With an annual net power production of 25.91 GWh, the power output is between 2 and 42 % higher compared with the other three configurations (parallel, serial and serial-parallel). The application of a recuperator within the ORC system has a significant impact on the serial concepts, but only marginally increases the power output of the parallel layouts. Depending on the plant configuration, there is an optimal desorber temperature of the absorption chiller. In case of serial concepts, the desorber temperature affects only the brine reinjection temperature, but not the ORC net power. For serial concepts, an optimal desorber temperature between 65 and 70 °C is revealed. Finally, the results highlight the importance of considering part load effects when evaluating the annual performance of geothermal trigeneration systems.
UR - http://www.scopus.com/inward/record.url?scp=85136845218&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85136845218
SN - 9783000706868
T3 - International Seminar on ORC Power Systems
BT - Proceedings of the 6th International Seminar on ORC Power Systems, 2021
A2 - Wieland, Christoph
A2 - Karellas, Sotirios
A2 - Quoilin, Sylvain
A2 - Schifflechner, Christopher
A2 - Dawo, Fabian
A2 - Spliethoff, Hartmut
PB - Knowledge Center on Organic Rankine Cycle Technology (KCORC)
T2 - 6th International Seminar on ORC Power Systems, ORC 2021
Y2 - 11 October 2021 through 13 October 2021
ER -