Heat pumps play a crucial role in energy transition. The heat pumps currently available on the market almost exclusively use compressor technology. They require refrigerants for their operation, but these are often harmful to health and/or environment, and they are relatively inefficient. Fraunhofer IPM develops efficient caloric heat pumps and cooling systems as an alternative to compressor technology. The central innovation is our novel concept for heat transfer that promises high energy and cost efficiency. In the development of caloric systems, we rely on the following caloric technologies:
Magnetocaloric materials are magnetisable materials that heat up in a magnetic field and cool down again once the field is removed. This method is distinguished in particular by the high efficiency of the material.
The principle is the same as it is for magnetocalorics: By applying a field, heat is reversibly generated in the electrocaloric material. Unlike magnetocalorics, electrocalorics involves the use of an electric field.
Elastocaloric materials are known as »shape memory alloys« in other applications. The introduction of heat can lead to a change in shape with these alloys. The inverse effect can also be used: reversible heat can be generated by applying force to the material. A cooling system can be created using appropriate system integration in a completely analogous way to magnetocalorics or electrocalorics.
Jahr Year | Titel/Autor:in Title/Author | Publikationstyp Publication Type |
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2024 | Highly Efficient Drive System for Elastocaloric Heat Pumps and Cooling Systems Unmüßig, Sabrina; Burghardt, Andreas; Schäfer-Welsen, Olaf; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2024 | Voltage-Sensorless Control and GaN Multilevel Converter for Charging Non-Linear and Lossy Electrocaloric Capacitors Mönch, Stefan; Reiner, Richard; Basler, Michael; Waltereit, Patrick; Quay, Rüdiger; Bartholome, Kilian |
Konferenzbeitrag Conference Paper |
2024 | Cooling with Magnets-Proving the Concept of Cascaded Caloric Heat Pipes Schipper, Jan; Wöllenstein, Jürgen; Unmüßig, Sabrina; Bartholome, Kilian |
Konferenzbeitrag Conference Paper |
2024 | Steigerung der Systemperformance eines elastokalorischen Kühlsystems Bachmann, Nora |
Dissertation Doctoral Thesis |
2024 | Over 99.7% Efficient GaN-based 6-Level Capacitive-Load Power Converter Mönch, Stefan; Reiner, Richard; Basler, Michael; Bartholome, Kilian; Waltereit, Patrick; Quay, Rüdiger |
Konferenzbeitrag Conference Paper |
2024 | Introduction of novel method of cyclic self-heating for the experimental quantification of the efficiency of caloric materials shown for LaFe11,4Mn0,35Si1,26Hx Schipper, Jan; Melchin, Stefan; Metzdorf, Julius; Bach, David; Fehrenbach, Miriam; Löwe, Konrad; Vieyra Avilés, Víctor Hugo; Kühnemann, Frank; Wöllenstein, Jürgen; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2024 | Electrocaloric cooling system utilizing latent heat transfer for high power density Metzdorf, Julius; Corhan, Patrick; Bach, David; Hirose, Sakyo; Lellinger, Dirk; Mönch, Stefan; Kühnemann, Frank; Schäfer-Welsen, Olaf; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2023 | A 99.74% Efficient Capacitor-Charging Converter using Partial Power Processing for Electrocalorics Mönch, Stefan; Reiner, Richard; Mansour, Kareem; Waltereit, Patrick; Basler, Michael; Quay, Rüdiger; Molin, Christian; Gebhardt, Sylvia; Bach, David; Binninger, Roland; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2023 | On the efficiency of caloric materials in direct comparison with exergetic grades of compressors Schipper, Jan; Bach, David; Mönch, Stefan; Molin, Christian; Gebhardt, Sylvia; Wöllenstein, Jürgen; Schäfer-Welsen, Olaf; Vogel, Christian; Langebach, Robin; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2023 | How highly efficient power electronics transfers high electrocaloric material performance to heat pump systems Mönch, Stefan; Reiner, Richard; Waltereit, Patrick; Basler, Michael; Quay, Rüdiger; Gebhardt, Sylvia; Molin, Christian; Bach, David; Binninger, Roland; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2023 | Spatio-temporal solid-state electrocaloric effect exceeding twice the adiabatic temperature change Mönch, Stefan; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2023 | Phenomenological Material Model for First-Order Electrocaloric Material Unmüßig, Sabrina; Bach, David; Nouchokgwe Kamgue, Youri Dilan; Defay, Emmanuel; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2022 | Phenomenological model for first-order elastocaloric materials Bachmann, Nora; Fitger, Andreas; Unmüßig, Sabrina; Bach, David; Schäfer-Welsen, Olaf; Koch, Thomas; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2022 | Concept of a Magnetocaloric Generator with Latent Heat Transfer for the Conversion of Heat into Electricity Baliozian, Puzant; Corhan, Patrick; Hess, Tobias; Bartholome, Kilian; Wöllenstein, Jürgen |
Zeitschriftenaufsatz Journal Article |
2022 | GaN Power Converter Applied to Electrocaloric Heat Pump Prototype and Carnot Cycle Mönch, Stefan; Reiner, Richard; Mansour, Kareem; Basler, Michael; Waltereit, Patrick; Quay, Rüdiger; Bartholome, Kilian |
Konferenzbeitrag Conference Paper |
2022 | Long life elastocaloric regenerator operating under compression Ianniciello, Lucia; Bartholome, Kilian; Fitger, Andreas; Engelbrecht, Kurt |
Zeitschriftenaufsatz Journal Article |
2022 | Elastokalorik: Entwicklung hocheffizienter Wärmepumpen ohne schädliche Kältemittel zum Heizen und Kühlen Fitger, Andreas; Bartholome, Kilian; Bachmann, Nora; Unmüßig, Sabrina; Winkler, Markus; Mahlke, Andreas |
Bericht Report |
2022 | Modeling of an Elastocaloric Cooling System for Determining Efficiency Bachmann, Nora; Schwarz, Daniel; Bach, David; Schäfer-Welsen, Olaf; Koch, Thomas; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2022 | Enhancing Electrocaloric Heat Pump Performance by Over 99% Efficient Power Converters and Offset Fields Mönch, Stefan; Reiner, Richard; Waltereit, Patrick; Molin, Christian; Gebhardt, Sylvia; Bach, David; Binninger, Roland; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2022 | A GaN-based DC-DC Converter with Zero Voltage Switching and Hysteretic Current Control for 99% Efficient Bidirectional Charging of Electrocaloric Capacitive Loads Mönch, Stefan; Mansour, Kareem; Reiner, Richard; Basler, Michael; Waltereit, Patrick; Quay, Rüdiger; Molin, Christian; Gebhardt, Sylvia; Bach, David; Binninger, Roland; Bartholome, Kilian |
Konferenzbeitrag Conference Paper |
2021 | Method for stabilizing and/or controlling and/or regulating the working temperature, heat exchanger unit, device for transporting energy, refrigerating machine and heat pump Fitger, Andreas; Mahlke, Andreas; Bachmann, Nora; Corhan, Patrick; Maier, Lena Maria; Bartholomé, Kilian; Schäfer-Welsen, Olaf |
Patent |
2021 | MagMed - Entwicklungen einer kältemittelfreien und effizienten Kühltechnik. Abschlussbericht Kopitzke, Jochen; Niebuhr, Herbert; Müller, Gerhard; Wittig, Daniel; Bartholomé, Kilian; Maier, Lena Maria; Corhan, Patrick; Barzca, Alexander; Vieyra, Hugo; Katterer, Matthias; Vogel, Christian |
Bericht Report |
2021 | Zur Steigerung der spezifischen Leistung eines magnetokalorischen Kühlsystems Maier, Lena Maria |
Dissertation Doctoral Thesis |
2021 | Long-term stable compressive elastocaloric cooling system with latent heat transfer Bachmann, Nora; Fitger, Andreas; Maier, Lena Maria; Mahlke, Andreas; Schäfer-Welsen, Olaf; Koch, Thomas; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2020 | Modellierung einer magnetokalorischen Wärmepumpe mit thermischen Dioden Hess, Tobias |
Dissertation Doctoral Thesis |
2020 | Method to characterize a thermal diode in saturated steam atmosphere Maier, Lena Maria; Hess, Tobias; Kaube, Alexandra; Corhan, Patrick; Fitger, Andreas; Bachmann, Nora; Schäfer-Welsen, Olaf; Wöllenstein, Jürgen; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2020 | Active magnetocaloric heat pipes provide enhanced specific power of caloric refrigeration Maier, Lena Maria; Corhan, Patrick; Barcza, Alexander; Vieyra, Hugo; Vogel, Christian; König, Jan D.; Schäfer-Welsen, Olaf; Wöllenstein, Jürgen; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2020 | Thermal hysteresis and its impact on the efficiency of first-order caloric materials Hess, Tobias; Maier, Lena Maria; Bachmann, Nora; Corhan, Patrick; Schäfer-Welsen, Olaf; Wöllenstein, Jürgen; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2020 | Magnetokalorische Wärmepumpen mit hohen Zyklusfrequenzen Maier, Lena Maria; Hess, Tobias; Corhan, Patrick; Schmiz, Sophie; Bachmann, Nora; Schäfer-Welsen, Olaf; Wöllenstein, Jürgen; Bartholome, Kilian |
Konferenzbeitrag Conference Paper |
2020 | Phenomenological model for a first-order magnetocaloric material Hess, Tobias; Vogel, Christian; Maier, Lena Maria; Barcza, Alexander; Vieyra, Hugo; Schäfer-Welsen, Olaf; Wöllenstein, Jürgen; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2019 | Modelling cascaded caloric refrigeration systems that are based on thermal diodes or switches Hess, Tobias; Maier, Lena Maria; Corhan, Patrick; Schäfer-Welsen, Olaf; Wöllenstein, Jürgen; Bartholome, Kilian |
Zeitschriftenaufsatz Journal Article |
2018 | Towards high cycle frequencies for magnetocaloric cooling systems - a proof of principle Maier, Lena Maria; Hess, Tobias; Schäfer-Welsen, O.; Wöllenstein, Jürgen; Bartholome, Kilian |
Konferenzbeitrag Conference Paper |
2017 | New concept for high-efficient cooling systems based on solid-state caloric materials as refrigerant Bartholome, Kilian; Hess, Tobias; Winkler, Markus; Mahlke, Andreas; König, Jan D. |
Konferenzbeitrag Conference Paper |