PDF Publication Title:
Text from PDF Page: 001
THERMOCHEMICAL STORAGE MATERIALS RESEARCH - TGA/DSC-HYDRATION STUDIES Opel, O., Rammelberg, H.U., Gérard, M., Ruck, W. Institute of Environmental Chemistry, Faculty Sustainability, Leuphana University of Lueneburg, Scharnhorststrasse 1/13, 21335 Lueneburg, Germany Corresponding author: opel@uni.leuphana.de ABSTRACT Thermal energy storage is regarded as an enabling technology with a variety of applications, especially regarding energy efficiency and usage of renewable and waste heat. Thermochemical storage materials, in this aspect, provide much higher storage capacities per mass or volume compared to sensible or latent heat storage, often by a factor of 10 or more compared to water storage, the most often used storage type [1]. Moreover, thermochemical storage materials can store the heat for infinite time without insulation and are regarded as a key technology for heat transport and long term storage, although short term storage concepts presently seem to be more feasible in terms of economy [2]. However, as with latent heat storage materials too, the storage design has to meet a number of key parameters, the power density and cycle efficiency as well as cycling stability being of highest importance in addition to the storage capacity. In order to assess these key parameters, a method for TGA/DSC measurements of hydration and dehydration processes has been developed. Using this method, properties of thermochemical storage materials that are making use of hydration/dehydration processes can be determined directly. We were able to investigate power densities dependent on water vapour partial pressure and layer thickness, as well as maximum storage efficiencies and cycling stability of various materials and composites. NOMENCLATURE Q Heat, J Q0 Amount of heat released during the first hydration concerning cycling stability , J θ Temperature, °C ε Cycle efficiency, % BACKGROUND, AIM AND SCOPE Thermochemical heat storage materials (TCM) have been subject of research for quite a long time. Since water as a reactant, as it is non-toxic, less corrosive and ubiquitous, and can be stored in its liquid form at ambient temperatures, provides certain advantages over carbon dioxide, ammoniac and hydrogen, for example, research is more or less focused on adsorption and desorption of water and hydration/dehydration processes. First qualitative descriptions of the underlying reactions can be found published in the 1820’s [e.g. 3]. Reversible chemical reactions, which could be useful for thermochemical heat storage, have been studied since the 1930’s [4, 5]. First theoretical considerations on a possible use as a thermochemical heat store can be found published in the 1980’s [6], whereas system designs first appeared in the early 1990’s, for example as an application to store solar heat in the concept of steam-process based electricity production for a lunar base, using calcium hydroxide as TCM [7]. Later, different systems have been described using adsorption/desorption of water on zeolites [8] and the concept of a thermochemical heat pump [9] using magnesium hydroxide. In 2006, van Helden presented a concept for the seasonal storage of solar heat using TCM [10], basically following the concept of a thermochemical heat pump. Whereas zeolite systems can be regarded to be more or less functional, TCM storage using salts and salt hydrates is still in development. Key questions are still the appropriate basic process design, which has to be fitted to the targeted applications, and materials research to optimize key parameters as therePDF Image | THERMOCHEMICAL STORAGE MATERIALS RESEARCH
PDF Search Title:
THERMOCHEMICAL STORAGE MATERIALS RESEARCHOriginal File Name Searched:
Task42_Thermochemical_Storage_Materials_Research.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |