Ben Welter - Tuesday, January 31, 2017
TES economics, microencapsulation and new materials were among the topics at this year's Swiss Symposium Thermal Energy Storage in Lucerne.
The symposium, held Jan. 20 at the Lucerne University of Applied Sciences and Arts, drew 135 participants. Prof. Dr. Jörg Worlitschek, who organized the gathering, described the feedback from participants as “really positive.”
The 5th Swiss Symposium Thermal Energy Storage will be held on Jan. 26, 2018. Here’s a brief look at a few of this year’s presentations:
• Thermal Energy Storage: Possibilities and Outlook: Luisa F. Cabeza, right, University of Lleida, Spain, provided an overview of the basic principals and benefits of TES and offered an up-to-date look at strategic research priorities for sensible TES, latent TES and thermochemical storage.
• Development of Latent Heat Transportation Systems with Various PCM: Hiroshi Suzuki, Ruri Hidema and Yoshiyuki Komoda, Kobe University, Japan, examined the process of microencapsulating PCM in a silica hard shell. Their conclusion: The material shows great promise for a variety of applications.
• Thermoplastic Heat Storage Materials for Diverse Applications: Stefan Reinemann, head of plastics research at TITK, Germany, described the development of a PCM compound in which liquid paraffin is bound in a polymeric network structure. These PCM polymer storage granules have a “large heat transfer area,” melting ranges from -4 to 82 degrees C and a heat capacity of up to 180 joules per gram. The granules can be used in textiles, household appliances, building materials and prosthetics.
• A Simple Tool for the Economic Evaluation of Thermal Energy Storage: Christoph Rathgeber, ZAE Bayern, Center for Applied Energy Research, Germany, presented two formula-driven ways to make a rough estimate of the economic viability of an energy storage for a specific application: Top-down (following the assumption that the costs of energy supplied by the storage should not exceed the costs of energy from the market) and Bottom-up (focusing on the realized storage capacity costs of existing storages). Among “long-term storages for building applications,” the analysis found that seasonal thermal storage is only economical via large hot water systems. Among “short-term storage for industrial applications,” the analysis found that ice storage systems are cost effective, and other technologies (such as mobile storage using sodium acetate trihydrate) are getting close. For more on this work, see http://tinyurl.com/tes-economic-evaluation.