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Stefan Gschwander

Bio: Stefan Gschwander is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Thermal energy storage & Phase-change material. The author has an hindex of 12, co-authored 30 publications receiving 993 citations.

Papers
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TL;DR: In this article, the authors describe the work done at Fraunhofer ISE within a German government-funded project over the last 5 years, extending from building simulations to first measurements of full-size rooms equipped with PCM.

541 citations

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TL;DR: In this article, phase-change slurries (PCSs) are used to increase the efficiency of phase transition materials, e.g., Paraffin and water, by using phase change materials and carrier fluids.

120 citations

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TL;DR: In this paper, the authors show equipment developed in different research centers and universities to analyze thermophysical properties, such as specific heat, latent heat and melting temperature, and thermal conductivity and diffusivity of PCM and hybrid PCM materials.
Abstract: The use of thermal energy storage by phase change materials (PCM) is increasing in interest for building applications. For the deployment of the technology, appropriate characterization of PCM and hybrid PCM is essential, but it is not always possible to carry it out with conventional equipment, mainly due to the sample size. This paper shows equipment developed in different research centers and universities to analyze thermophysical properties, such as specific heat, latent heat and melting temperature, and thermal conductivity and diffusivity of PCM and hybrid PCM materials.

84 citations

Journal ArticleDOI
TL;DR: In this paper, a screw heat exchanger (SHE) is employed for heat transfer in a two-phase phase change media, where the phase change material (PCM) is an eutectic mixture of NaNO3 and KNO3 with a melting point at Tm −1.221°C. The heat transfer characteristics of the storage are dependent on parameters such as the PCM mass flow, the rotational speed of the screw shafts, the temperature difference of PCM to the heat transfer media, the inclination of the heat exchange, and the

79 citations

Journal ArticleDOI
TL;DR: A multi-objective optimisation strategy for TES systems using PCMs for solar air systems was presented, in which two performance indicators of average heat transfer effectiveness and effective PCM charging time were used as the conflicting objectives.

50 citations


Cited by
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Journal ArticleDOI
TL;DR: The use of a latent heat storage system using phase change materials (PCMs) is an effective way of storing thermal energy and has the advantages of high energy storage density and the isothermal nature of the storage process.
Abstract: The use of a latent heat storage system using phase change materials (PCMs) is an effective way of storing thermal energy and has the advantages of high-energy storage density and the isothermal nature of the storage process. PCMs have been widely used in latent heat thermal-storage systems for heat pumps, solar engineering, and spacecraft thermal control applications. The uses of PCMs for heating and cooling applications for buildings have been investigated within the past decade. There are large numbers of PCMs that melt and solidify at a wide range of temperatures, making them attractive in a number of applications. This paper also summarizes the investigation and analysis of the available thermal energy storage systems incorporating PCMs for use in different applications.

4,482 citations

Journal ArticleDOI
TL;DR: In this article, the state of the art of phase change materials for thermal energy storage applications is reviewed and an insight into recent efforts to develop new phase change material with enhanced performance and safety.

1,399 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive review of the integration of phase change materials in building walls is presented. But, even if the integrated phase change material have a good potential for reducing energy demand, further investigations are needed to really assess their use.
Abstract: The present paper is the first comprehensive review of the integration of phase change materials in building walls. Many considerations are discussed in this paper including physical considerations about building envelope and phase change material, phase change material integration and thermophysical property measurements and various experimental and numerical studies concerning the integration. Even if the integrated phase change material have a good potential for reducing energy demand, further investigations are needed to really assess their use.

856 citations

Journal ArticleDOI
TL;DR: In this paper, the authors explore how and where phase change materials (PCMs) are used in passive latent heat thermal energy storage (LHTES) systems, and present an overview of how these construction solutions are related to building's energy performance.

817 citations

Journal ArticleDOI
TL;DR: In this article, the authors focus on the application of various phase change materials based on their thermophysical properties, in particular, the melting point, thermal energy storage density and thermal conductivity of the organic, inorganic and eutectic phases.

813 citations