Search
Results
-
The Role of Water in Adsorption-based CO2 Capture Systems
(2013)Energy Procedia ~ GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control TechnologiesCyclic adsorption processes such as Pressure, Temperature, and Vacuum Swing Adsorption have received increased attention as potential techniques for the capture of CO2 from gas mixtures in industrial processes. A key challenge in the design of these processes is to gain a thorough understanding of the interactions between the numerous gas phase components and the sorbent material, as an effective separation requires a selective adsorption ...Conference Paper -
Comparison of commercial and new adsorbent materials for pre-combustion CO2 capture by pressure swing adsorption
(2013)Energy Procedia ~ GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control TechnologiesThe IGCC technology (Integrated Gasification Combined Cycle) with pre-combustion CO2 capture is a promising approach for near-zero CO2 emission power plants to be realized in the near future. A key challenge within this technology is the separation of the CO2/H2 gas mixture resulting from the water gas shift reaction that follows the gasification of coal. For the CO2 stream a purity of about 95% is required; additionally a CO2 capture ...Conference Paper -
Wind Effect on PV Module Temperature: Analysis of Different Techniques for an Accurate Estimation
(2013)Energy Procedia ~ European Geosciences Union General Assembly 2013, EGUDivision Energy, Resources & the Environment, EREPhotovoltaic (PV) module temperature predictions are crucial to accurately assess the efficiency of PV installations. In this study we focus on the cooling effect of wind on PV cell temperature. We show that for most of the technologies installed at a PV test facility in Bolzano (Italy), models including wind data predict PV cell temperature better than standard approaches which do not include wind data. Moreover, we show that wind data ...Conference Paper -
Geomechanical modeling of fault responses and the potential for notable seismic events during underground CO2 injection
(2013)Energy Procedia ~ GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control TechnologiesWe summarize a number of recent modeling studies related to the potential for fault reactivations and induced seismicity during underground CO2 injection. The model simulations were conducted using coupled multiphase fluid flow and geomechanics, including fault-frictional weakening enabling analysis of sudden (seismic) fault rupture, with some of the numerical analyses extended to dynamic modeling of seismic source, wave propagation, and ...Conference Paper -
Dissolution of activated serpentine for direct flue-gas mineralization
(2013)Energy Procedia ~ GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control TechnologiesThe dissolution of thermally activated serpentine (75% dehydroxylated) by direct flue-gas mineralization was investigated at far-from-equilibrium (w.r.t mineral dissolution) flow-through operating conditions. Experiments were performed at moderate partial pressures of CO2 (0.1 bar 2 bar CO2) and temperatures (30 °C 90 °C). Thermal activation enabled the dissolution of serpentine at mildly acidic conditions. Both magnesium and silica were ...Conference Paper -
Carbonation of activated serpentine for direct flue gas mineralization
(2013)Energy Procedia ~ GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control TechnologiesResearch in mineral carbonation has moved towards process concepts that combine the capture of CO2 from flue gas with its conversion into stable carbonates. This requires highly reactive source materials that dissolve under lean CO2 pressures and temperatures. Activated serpentine has been used in this study, and its carbonation potential under flue gas conditions has been investigated. Single-step carbonation experiments were performed ...Conference Paper -
The effect of second-order hydrodynamics on floating offshore wind turbines
(2013)Energy Procedia ~ DeepWind'2013 – Selected papers from 10th Deep Sea Offshore Wind R&D ConferenceOffshore winds are generally stronger and more consistent than winds on land, making the offshore environment attractive for wind energy development. A large part of the offshore wind resource is however located in deep water, where floating turbines are the only economical way of harvesting the energy. The design of offshore floating wind turbines relies on the use of modeling tools that can simulate the entire coupled system behaviour. ...Conference Paper -
The Interplay of Non-static Permeability and Fluid Flow as a Possible Pre-requisite for Supercritical Geothermal Resources
(2013)Energy Procedia ~ European Geosciences Union General Assembly 2013, EGUDivision Energy, Resources & the Environment, EREUnconventional geothermal resources at supercritical conditions have been inferred to occur beneath high-enthalpy systems in active magmatic environments, and bear the potential to increase electricity production from a geothermal well by an order of magnitude. The high specific enthalpies of these fluids cannot be explained by simple convection models and a hydrologic divide between two distinct flow regimes may be required. In numerical ...Conference Paper -
Model Predictive Control of a Swiss Office Building
(2013)Clima 2013The research project OptiControl (www.opticontrol.ethz.ch) deals with the development of novel, predictive control strategies for buildings. The strategies are tested on a fully occupied, well instrumented typical Swiss office building. This work presents our experience with the application of Model Predictive Control (MPC). The application of novel rule-based control (RBC) strategies on the same building is presented in a companion paper ...Conference Paper -
Self-organisation of motion features with a temporal asynchronous dynamic vision sensor
(2013)Biologically Inspired Cognitive ArchitecturesNeural circuits closer to the periphery tend to be organised in a topological way, i.e. stimuli which are spatially close tend to be mapped onto neighbouring processing neurons. The goal of this study is to show how motion features (optic-flow), which have an inherent spatio-temporal profile, can be self-organised using correlations of precise spike intervals. The proposed framework is applied to the spiking output of an asynchronous ...Conference Paper