A5079202688- Phase Change Materials Research
- Adsorption and Cooling Systems
- Solar Thermal and Photovoltaic Systems
- Building Energy and Comfort Optimization
- Photovoltaic System Optimization Techniques
- Heat Transfer and Optimization
- Geothermal Energy Systems and Applications
- Solar Radiation and Photovoltaics
- Energy and Environmental Systems
- Advanced Thermodynamics and Statistical Mechanics
- Precipitation Measurement and Analysis
- Energy, Environment, Agriculture Analysis
- Polymer Science and PVC
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Integrated Energy Systems Optimization
- Refrigeration and Air Conditioning Technologies
- Hygrothermal properties of building materials
- Freezing and Crystallization Processes
- Structural Analysis of Composite Materials
- Solar-Powered Water Purification Methods
- Greenhouse Technology and Climate Control
Technical University of Denmark
2014-2024
Universidad de Zaragoza
2017
Sodium acetate trihydrate and graphite powdermixtures have been evaluated toinvestigate the influence of powder on stability supercooling. A sodium water mixturemixed with was successfully supercooled at ambient indoor temperatures for five months. The stabilized using carboxymetyl cellulose tested in heating supercooling cycles no loss performance. Thermal conductivity enhancing properties shown samples. Since experiments were conducted small scale, 200 g per sample, large scale are...
Laboratory test of a long term heat storage module utilizing the principle stable supercooling 199.5 kg sodium acetate water mixture has been carried out. Avoiding phase separation incongruently melting salt hydrate by using extra principleincreased capacity. An external expansion vessel minimized pressure built up in while heating and reduced risk instable supercooling. The was supercooled at indoor ambient temperature for to two months after which it discharged. energy discharged...
To enable the transition from fossil fuels as a primary heat source for domestic hot water preparation and space heating solar thermal energy has great potential. The sun disadvantage that it is not always available when there demand. solve this mismatch seasonal storage can be used to store excess summer winter demand higher than supply. Installing long term in one family house needs compact sensible storages are suitable. A latent with phase change material (PCM) provide more way of...
Within the framework of IEA SHC Task 42 / ECES Annex 29, a simple tool for economic evaluation thermal energy storages has been developed and tested on various existing storages. On that account, storage capacity costs (costs per installed capacity) have evaluated via Top-down Bottom-up approach. The approach follows assumption supplied by should not exceed from market. maximum acceptable depend interest rate assigned to capital costs, intended payback period user class (e.g. industry or...
The IEA joint Task 42 / Annex 29 is aimed at developing compact thermal energy storage materials and systems. In Working Group B, experts are working on the development of applications, in areas cooling, domestic heating hot water industry. majority application projects were field room water. this article, an overview given a large number applications. technologies used applications latent heat storage, open closed solid sorption, liquid sorption salt hydrates composites thereof. On broad...
A latent heat storage based on the phase change material Sodium Acetate Trihydrate (SAT) has been tested as part of a demonstration system. The full consisted 4 individual modules each containing about 200 kg sodium acetate trihydrate with different additives. aim was to actively utilize ability supercool obtain long periods. were charged solar supplied by 22.4 m 2 evacuated tubular collectors. investigation showed that it possible fully charge one module within period 270 minutes clear...
An important prerequisite to select a reliable phase change material (PCM) for thermal energy storage applications is test it under application conditions. In the case of solid–liquid PCM, large amount can be stored and released in small temperature range around transition. Therefore, long-term stability they are subjected melting solidification processes taking into account conditions intended application. this work, 18 experimental devices investigate PCM presented. The experiments divided...
Experimental and theoretic investigations are carried out to study the heat transfer capacity rate of a exchanger module for seasonal storage with sodium acetate trihydrate (SAT) supercooling in stable way. A sandwich test has been built phase change material (PCM) box between two plate exchangers. Charge PCM is investigated experimentally solid SAT as initial condition. Discharge presence crystallization studied experimentally. Fluid flow theoretically by Computational Dynamics (CFD)...
Stable supercooling of sodium acetate trihydrate (SAT) composites can be used to store heat over long periods. When the melted SAT is supercooled and in temperature equilibrium with ambient, latent fusion essentially stored without further loss. The main limitation this technology that may crystalize spontaneously release before desired if storage design does not allow for principle work. These investigations elucidate effects charge discharge temperatures durations on stability units...
Experimental and theoretical investigations are carried out to study the heating of a 302 x 55 mm test box steel containing sodium acetate water mixture. A thermostatic bath has been set up control charging discharging box. The investigated experimentally by measuring surface temperatures as well internal temperature mixture through probe located in center developments on outer surfaces used input parameters for Computational Fluid Dynamics (CFD) model. CFD calculated compared measured...
Cylindrical heat storage modules with internal exchangers have been tested in a laboratory. The were filled water and sodium acetate trihydrate additives. testing focused on the content of material exchange capacity rate during charge module. For tests phase change materials, focus was furthermore stability supercooling cycling stability. Testing module 6.4% extra showed that separation increased released after solidification supercooled reduced over 17 test cycles. thickening agent graphite...