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Hybrid Air-Conditioning for Electric Vehicles by Combining a Heating and a Desiccant System
(2017)26th Aachen Colloquium Automobile and Engine TechnologyConference Paper -
Integrated process and solvent design using COSMO-RS for the production of CO from CO2 and H2
(2017)Computer Aided Chemical Engineering ~ 27th European Symposium on Computer Aided Process EngineeringFluctuating H2 from renewable energy can be integrated into the chemical value chain by conversion of CO2 to CO via chemical storage. An efficient process combines the right chemical storage molecule in an optimized flowsheet with tailored solvents. For the resulting integrated process and solvent design problem, we present a hybrid stochastic-deterministic optimization approach combining computer-aided molecular design based on COSMO-RS ...Conference Paper -
Integrated Synthesis of Batch Plants and Utility Systems
(2017)Computer Aided Chemical Engineering ~ Proceedings of the 27th European Symposium on Computer Aided Process EngineeringConference Paper -
Integrating working fluid design into the thermo-economic design of ORC processes using PC-SAFT
(2017)Energy Procedia ~ 4th International Seminar on ORC Power SystemsTo exploit the full thermo-economic potential of an Organic Rankine Cycle (ORC), the process, equipment and working fluid have to be optimized simultaneously. Today, working fluid selection and thermo-economic process optimization are commonly separated. This separation leads to suboptimal solutions if the prior working fluid selection fails. In this work, we present an approach for the integrated thermo-economic design of ORC process, ...Conference Paper -
Time-series aggregation to typical periods with bounded error in objective function for energy systems synthesis
(2017)30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2017)A method for identification of typical periods is proposed. The chronology of time steps is retained which enables modelling of energy systems with storage units or start-up cost. The aim is to obtain few typical periods with few time steps per period, while accurately representing the cost of the full time series. Building on our previous work, we calculate the error of time-series aggregation as the cost difference between operating the ...Conference Paper -
Integrated Process and Molecular Design with Modelica Using Continuous-Molecular Targeting
(2017)Linköping Electronic Conference Proceedings ~ Proceedings of the 12th International Modelica ConferenceThe performance of many chemical and energy con-version processes depends on the choice of the mole-cules used, e.g. as solvents or working fluids. To cap-ture the complex relations between the properties of the molecules used and the process conditions, the selection of suitable molecules should be directly integrated into process design. Solving the resulting challenging integrated design problem is enabled by the Continous-Molecular ...Conference Paper -
Integrated thermo-economic design of ORC process, working fluid and equipment using PC-SAFT
(2017)Computer Aided Chemical Engineering ~ 27th European Symposium on Computer Aided Process EngineeringOrganic Rankine Cycles (ORCs) generate electrical power from low-temperature heat. To exploit the full potential of a heat source, the cycle has to be tailored to the specific application. In this work, we present an approach for the integrated thermo-economic design of ORC process, working fluid and equipment based on a single thermodynamic model. The approach is based on the Continuous-Molecular Targeting–Computer-aided Molecular Design ...Conference Paper -
Integrated design of ORC process and working fluid using PC-SAFT and Modelica
(2017)Energy Procedia ~ 4th International Seminar on ORC Power SystemsOrganic Rankine Cycles (ORC) use low-temperature heat to generate electrical power. To use the full potential of a heat source, the ORC has to be tailored to the specific application. Tailoring a cycle means an integrated design of both process and working fluid. This integrated design leads to complex mixed-integer nonlinear program (MINLP) optimization problems. To avoid this complexity, working fluid candidates are commonly preselected ...Conference Paper -
Integrated design of ORC process and working fluid using process flowsheeting software and PC-SAFT
(2017)Energy Procedia ~ 4th International Seminar on ORC Power SystemsOrganic Rankine Cycles (ORC) transform low-temperature heat into electrical power. To make best use of a heat source, ORC process and working fluid have to be optimized simultaneously. Thus, integrated design approaches of fluids and processes have been developed. However, integrated design approaches are usually complex and based on specific software tools which prevents fast and easy development of the ORC models. In this work, we have ...Conference Paper