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Active paraffin wax phase change actuators for intelligent process control

Germann, Thiemo ; Hinrichs, Frederik ; Kötting, Tim ; Groche, Peter (2022)
Active paraffin wax phase change actuators for intelligent process control.
SPIE Smart Structures + Nondestructive Evaluation, 2022.
doi: 10.1117/12.2612544
Konferenzveröffentlichung, Bibliographie

Kurzbeschreibung (Abstract)

Process fluctuations due to changing environmental conditions, thermal loads and wear are known problems in industrial production. When accumulated, they can lead to instabilities in process chains. Paraffin wax-based phase change actuators (PCA) are an available, robust solution for stabilization and error compensation. Consisting of two deep-drawn steel cups, joined by laser welding, they enclose a paraffin wax core. Phase transformation of the paraffin wax leads to a significant volume expansion, generating the actuating force. The PCAs are suitable even for highly rigid systems with achievable actuating forces of above 85 N/mm² of effective actuator area. Additionally, the particularly compact housing offers high integration capability. Passive PCAs, activated by environmental heat, are already integrated in industrial applications. For active application, an energy supply via additional external heating elements, e.g. heating tapes, is required. This contradicts the concept of a simple and compact overall system and thus the integration capability. The overriding challenge results in implementing the PCA as an actively controllable, integrated overall system. This paper presents an approach based on printed electronics, consisting of a conductive carbon ink, applied to a corresponding substrate by means of screen-printing. Electrical connections are subsequently attached and the heating unit is integrated into the PCA. This work shows challenges within design and implementation of these high-performance heating electronics. It discusses different inks, substrates and their necessary properties for PCA usage. Concepts for electrical conduction through the sealed actuator housing are presented. Finally, the performance of these PCAs is discussed and compared with passive, externally activated PCAs.

Typ des Eintrags: Konferenzveröffentlichung
Erschienen: 2022
Autor(en): Germann, Thiemo ; Hinrichs, Frederik ; Kötting, Tim ; Groche, Peter
Art des Eintrags: Bibliographie
Titel: Active paraffin wax phase change actuators for intelligent process control
Sprache: Englisch
Publikationsjahr: 20 April 2022
Ort: Long Beach, California, United States
Buchtitel: Proceedings of SPIE - Behavior and Mechanics of Multifunctional Materials XVI
Veranstaltungstitel: SPIE Smart Structures + Nondestructive Evaluation, 2022
DOI: 10.1117/12.2612544
Kurzbeschreibung (Abstract):

Process fluctuations due to changing environmental conditions, thermal loads and wear are known problems in industrial production. When accumulated, they can lead to instabilities in process chains. Paraffin wax-based phase change actuators (PCA) are an available, robust solution for stabilization and error compensation. Consisting of two deep-drawn steel cups, joined by laser welding, they enclose a paraffin wax core. Phase transformation of the paraffin wax leads to a significant volume expansion, generating the actuating force. The PCAs are suitable even for highly rigid systems with achievable actuating forces of above 85 N/mm² of effective actuator area. Additionally, the particularly compact housing offers high integration capability. Passive PCAs, activated by environmental heat, are already integrated in industrial applications. For active application, an energy supply via additional external heating elements, e.g. heating tapes, is required. This contradicts the concept of a simple and compact overall system and thus the integration capability. The overriding challenge results in implementing the PCA as an actively controllable, integrated overall system. This paper presents an approach based on printed electronics, consisting of a conductive carbon ink, applied to a corresponding substrate by means of screen-printing. Electrical connections are subsequently attached and the heating unit is integrated into the PCA. This work shows challenges within design and implementation of these high-performance heating electronics. It discusses different inks, substrates and their necessary properties for PCA usage. Concepts for electrical conduction through the sealed actuator housing are presented. Finally, the performance of these PCAs is discussed and compared with passive, externally activated PCAs.

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Institut für Produktionstechnik und Umformmaschinen (PtU)
16 Fachbereich Maschinenbau > Institut für Produktionstechnik und Umformmaschinen (PtU) > Forschungsabteilung Funktions- und Verbundbauweise
Hinterlegungsdatum: 22 Jun 2022 06:19
Letzte Änderung: 23 Jun 2022 06:26
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