Ingo Sass

Bio: Ingo Sass is an academic researcher from Technische Universität Darmstadt. The author has contributed to research in topics: Geothermal gradient & Borehole. The author has an hindex of 20, co-authored 203 publications receiving 1422 citations. Previous affiliations of Ingo Sass include Al al-Bayt University & Karlsruhe Institute of Technology.

Characteristics of medium deep borehole thermal energy storage

Abstract: Summary Seasonal energy storage is an important component to cope with the challenges resulting from fluctuating renewable energy sources and the corresponding mismatch of energy demand and supply. The storage of heat via medium deep borehole heat exchangers is a new approach in the field of Borehole Thermal Energy Storage. In contrast to conventional borehole storages, fewer, but deeper borehole heat exchangers tap into the subsurface, which serves as the storage medium. As a result, the thermal impact on shallow aquifers is strongly reduced mitigating negative effects on the drinking water quality. Furthermore, less surface area is required. However, there are no operational experiences, as the concept has not been put into practice so far. In this study, more than 250 different numerical storage models are compared. The influence of the characteristic design parameters on the storage system's behaviour and performance is analysed by variation of parameters like borefield layout, fluid inlet temperatures and properties of the reservoir rocks. The results indicate that especially larger systems have a high potential for efficient seasonal heat storage. Several GWh of thermal energy can be stored during summertime and extracted during the heating period with a high recovery rate of up to 83%. Medium deep borehole heat exchanger arrays are suitable thermal storages for fluctuating renewable energy sources and waste heat from industrial processes. Copyright © 2016 John Wiley & Sons, Ltd.

A method for assessing adhesion of clays to tunneling machines

Abstract: Tunnel boring machines passing through cohesive soils sometimes experience significant clogging, leading to delays and increased costs The paper describes a test to assess the likelihood of adhesion problems occurring, simulating the situation where a clay sticks to the cutting wheel of the machine The results of tests using kaolin clay suggest that the adhesion changes with the compression force Further studies are being undertaken to elucidate the factors which influence this, including clay mineralogy and roughness of the face of the cutting wheel It is hoped that the work will lead to an industrial standard method of assessing adhesion which can be used in site investigation and on site

Hydrologic impacts of thawing permafrost—A review

Abstract: Where present, permafrost exerts a primary control on water fluxes, flowpaths, and distribution. Climate warming and related drivers of soil thermal change are expected to modify the distribution of permafrost, leading to changing hydrologic conditions, including alterations in soil moisture, connectivity of inland waters, streamflow seasonality, and the partitioning of water stored above and below ground. The field of permafrost hydrology is undergoing rapid advancement with respect to multiscale observations, subsurface characterization, modeling, and integration with other disciplines. However, gaining predictive capability of the many interrelated consequences of climate change is a persistent challenge due to several factors. Observations of hydrologic change have been causally linked to permafrost thaw, but applications of process-based models needed to support and enhance the transferability of empirical linkages have often been restricted to generalized representations. Limitations stem from inadequate baseline permafrost and unfrozen hydrogeologic characterization, lack of historical data, and simplifications in structure and process representation needed to counter the high computational demands of cryohydrogeologic simulations. Further, due in part to the large degree of subsurface heterogeneity of permafrost landscapes and the nonuniformity in thaw patterns and rates, associations between various modes of permafrost thaw and hydrologic change are not readily scalable; even trajectories of change can differ. This review highlights promising advances in characterization and modeling of permafrost regions and presents ongoing research challenges toward projecting hydrologic and ecologic consequences of permafrost thaw at time and spatial scales that are useful to managers and researchers.

堆積岩 = Sedimentary rocks

Abstract: 1. Sediments and Methods of Their Study 2. Erosional Processes 2.1. Weathering 2.2. Transport 3. Depositional Processes and Sediment Types 3.1. Features of Detrital Sediments 3.2. Bedforms and Sedimentary Structures 3.3. Trace Fossils 3.4. Gravity Flows 3.5. Classification of Detrital Sediments 3.6. Origin of Chemogenic and Biogenic Sediments 3.7. Classification of Carbonate Rocks 4. Depositional Environments 4.1. Arid Continental Environments 4.2. Humid Continental Environments 4.3. Glacial Sediments 4.4. Shallow Marine Sediments 4.5. Deep Marine Sediments 5. Sedimentary Basins and Their Types and Preservation 6. The Facies Concept and Multi-Story Sedimentary Packages 7. Post-Depositional Processes 8. Sediment Utilization Glossary Bibliography Biographical Sketch

Handbook of Data Mining and Knowledge Discovery

Abstract: Give us 5 minutes and we will show you the best book to read today. This is it, the handbook of data mining and knowledge discovery that will be your best choice for better reading book. Your five times will not spend wasted by reading this website. You can take the book as a source to make better concept. Referring the books that can be situated with your needs is sometime difficult. But here, this is so easy. You can find the best thing of book that you can read.