Reversible Heat Pump–Organic Rankine Cycle Systems for the Storage of Renewable Electricity

Sebastian Staub, Peter Bazan, Konstantinos Braimakis, Dominik Müller, Christoph Regensburger, Daniel Scharrer, Bernd Schmitt, Daniel Steger, Reinhard German, Sotirios Karellas, Marco Pruckner, Eberhard Schlücker, Stefan Will and Jürgen Karl
Additional contact information
Sebastian Staub: Institute of Energy Process Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Fürther Strasse 244f, D-90429 Nürnberg, Germany
Peter Bazan: Computer Networks and Communication Systems, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Martensstr 3, 91058 Erlangen, Germany
Konstantinos Braimakis: Laboratory of Steam Boilers and Thermal Plants, National Technical University of Athens, 9 Heroon Polytechniou, 15780 Athens, Greece
Dominik Müller: Institute of Energy Process Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Fürther Strasse 244f, D-90429 Nürnberg, Germany
Christoph Regensburger: Institute of Process Machinery and Systems Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 4, 91058 Erlangen, Germany
Daniel Scharrer: Computer Networks and Communication Systems, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Martensstr 3, 91058 Erlangen, Germany
Bernd Schmitt: Institute of Engineering Thermodynamics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Am Weichselgarten 8, 91058 Erlangen-Tennenlohe, Germany
Daniel Steger: Institute of Process Machinery and Systems Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 4, 91058 Erlangen, Germany
Reinhard German: Computer Networks and Communication Systems, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Martensstr 3, 91058 Erlangen, Germany
Sotirios Karellas: Laboratory of Steam Boilers and Thermal Plants, National Technical University of Athens, 9 Heroon Polytechniou, 15780 Athens, Greece
Marco Pruckner: Computer Networks and Communication Systems, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Martensstr 3, 91058 Erlangen, Germany
Eberhard Schlücker: Institute of Process Machinery and Systems Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 4, 91058 Erlangen, Germany
Stefan Will: Institute of Engineering Thermodynamics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Am Weichselgarten 8, 91058 Erlangen-Tennenlohe, Germany
Jürgen Karl: Institute of Energy Process Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Fürther Strasse 244f, D-90429 Nürnberg, Germany

Energies, 2018, vol. 11, issue 6, 1-17

Abstract: Storage of electricity from fluctuating renewable energy sources has become one of the predominant challenges in future energy systems. A novel system comprises the combination of a heat pump and an Organic Rankine Cycle (ORC) with a simple hot water storage tank. The heat pump upgrades low temperature heat with excess power. The upgraded heat can drive an Organic Rankine Process using the heat pump in reverse operation mode. This approach allows a comparably efficient storage of excess electricity. Waste heat sources usually do not qualify for electricity production even with ORC processes due to low temperatures. Upgrading the temperature of the waste heat by means of excess electricity makes the use of an ORC feasible in order to recover the electricity input. Thermodynamic cycle simulations with IPSEpro software outline that the process provides power-to-power efficiencies in a range of 50% for small-scale applications based on commercially available heat pump components. The isentropic efficiency of compressors/expanders plays a crucial role on the system performance. Applications of the proposed cycle in the megawatt range with more efficient turbines and dynamic compressors will therefore increase the power-to-power efficiency to above 70%.

Keywords: Organic Rankine Cycle; heat pump; electricity storage; heat storage; efficiency (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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