2011 E3 Conference Posters

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Now showing 1 - 17 of 17
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    Hydrothermal Carbonization of Stillage Products Generated from Corn Ethanol Production
    (2011-11) Wood, Brandon; Valentas, Kenneth; Heilmann, Steven
    Hydrothermal Carbonization (HTC) is a platform thermochemical technology which utilizes high moisture content feedstocks. HTC of whole and thin stillage from the corn ethanol industry presents an opportunity to reduced energy and water usage, while diversifying value added products.
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    Is Planting Forests Bad For The Climate?
    (2011-11) Snyder, Peter K.
    Planting forests is a proven approach to mitigating global warming through sequestering atmospheric CO2. However, in the mid-latitudes this could actually have the unintended consequence of warming the planet by decreasing the surface reflectivity. Numerical modeling results are used to show where and how forests can benefit the climate.
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    Lossless Holographic Spectrum Splitter In Lateral Photovoltaic Devices
    (2011-11) Lin, Di; Torrey, Ethan R.; Leger, James R.; Cohen, Phil. I.
    Lateral photovoltaic structures require efficient partitioning of the solar spectrum and light delivery to the respective cells. Single-junction cells can be used, eliminating the need for current and lattice matching. We investigate the design issues associated with multiplexed volume holograms in fulfilling this role in a two-cell lateral PV system.
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    Adding Value to Ethanol Production Byproducts Through Production of Biochar and Bio-oil
    (2011-11) Spokas, K.; Ruan, R.; Morrison, R.
    This study aims at increasing the value of distillers’ grain by sequestering carbon and producing additional renewable energy resources (bio-oil and syngas) through microwave assisted pyrolysis. Bio-oil can be further upgraded to drop-in transportation fuels. Biochars are tested for their potential as soil improvement agents.
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    New method to convert heat directly into electricity
    (2011-11) Song, Yintao; Srivastava, Vijay; Bhatti, Kanwal; Leighton, Chris; James, Richard D.
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    Roll Press Compaction of Corn Stover and Perennial Grasses
    (2011-11) Kaliyan, Nalladurai; Morey, Vance; Schmidt, David; Tiffany, Douglas
    Increasing the bulk density of biomass materials to at least 240 kg/m3 (15 lb/ft3) is important for efficient handling and truck transport from the field to an end user. Roll press compaction increased the bulk density of coarsely ground biomass materials to 265 to 365 kg/m3 (16 to 23 lb/ft3).
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    Getting To Yes? Collaborative Landscape Design & Planning in Search of Broadly-Acceptable ‘Biofuel Landscapes’ for the Upper Midwest
    (2011-11) Jordan, N.; Bolstad, P.; Lapp, C.; Pitt, D.; Schively Slotterback, C.; Meschke, L.
    Producing agriculture bioenergy from perennial crops could have many 'spin-off' benefits for resource conservation and rural communities. But the devil is in the details: which benefits matter most and who will pay for them? We are searching for bioenergy production systems that have broad support from farmers, environmentalists and landowners.
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    Solar Fuels from Nanostructured Ceria-based Oxides
    (2011-11) Petkovich, Nick; Rudisill, Stephen; Boman, Daniel; Stein, Andreas; Venstrom, Luke; Davidson, Jane H.
    The solar resource can be converted into liquid fuels to offset petroleum use in the transportation sector using a thermochemical process based on cerium oxide (CeO2). To increase the rate of fuel production in the process, three-dimensionally ordered macroporous (3DOM) CeO2-based oxides are employed.
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    Solar Thermal Air Conditioning–Early Experience and Results
    (2011-11) Reese, Michael; Buchanan, Eric
    Early performance results and installation experiences of a hot water fired absorption chiller are presented. The hot water is provided by evacuated tube solar thermal collectors. The system is designed to take advantage of the greater summer solar resource to offset the greatest summer energy load: air conditioning.
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    Evaluating Wood Energy Opportunity Zones: Integrating Social and Biophysical Project Planning
    (2011-11) Becker, Dennis R.
    A forest-based bioeconomy may simultaneously address national security concerns and climate change and promote economic development while facilitating forest health treatments and wildfire risk reduction. This research accelerates wood energy development using information on the social, financial, and environmental aspects of facility siting to identify “opportunity zones” adjacent to national forests.
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    Hydrostatic Transmission for Wind Power Generation
    (2011-11) Stelson, Kim; Kildegaard, Arne; Brad Bohlmann, Brad; Wang, Feng; Thul, Brenen; Dutta, Rahul
    The University of Minnesota is performing research on the application of continuously variable hydrostatic transmissions for wind turbines. By replacing the gearbox of traditional wind turbines with a continuously variable hydrostatic transmission (HST) more efficient turbine operation could be achieved without the use of unreliable gearbox and power electronics.
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    Pumped Hydro Energy Storage (PHES) Using Abandoned Mine Pits on the Mesabi Iron Range of Minnesota – the Range of Opportunities and Issues
    (2011-11) Fosnacht, Donald
    Using the 48 GIS coverages collected for this study, and total of 27 sites along the 120 mile long Mesabi Iron Range (MIR) were evaluated as potential PHES site. A set of pass/fail criteria were used by the four teams to evaluate and rank 14 of the most promising sites.
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    Optimal physical pretreatment conditions for the release of organic matter from dairy manure determined by the orthogonal experiment design
    (2011-11) Sun, Jianping; Zhu, Jun; Li, Wenhong
    The optimum physical conditions for releasing carbohydrate, protein and total phosphate were pH 2.0, reaction temperature 90oC, and particle size of <0.15mm, under which the carbohydrate and protein releasing rates could improve by 204.6 and 233.4%, and the total phosphorus concentration could increase from 0.21 mg/l to 6.5 mg/l.
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    Thermochemical Seasonal Energy Storage using Calcium Chloride
    (2011-11) Quinnell, Josh; Davidson, Jane
    Space heating accounts for 45 percent of all residential energy. The major challenge in using solar thermal systems for space heating is the inadequate winter solar resource. To address this challenge, we have developed long-term storage to save solar energy from the summer for use in the winter.
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    Engineering a Multi-species Fermentation Platform for Biofuel Production
    (2011-11) Babson, David; Yeom, Soo-Jin; Schmidt-Dannert, Claudia
    Biodiesel production is an emerging renewable fuel technology. By using microbial consortia, the biosynthetic pathway can be divided-up among multiple microbial populations to create more efficient production processes. The mixed populations are controlled by synthetic interspecies communication circuits, and the consortia metabolism can be engineered to optimize available biomass utilization.
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    Efficient charge transfer from excited state dye molecules into nanoparticles as a model for dye sensitized solar cells
    (2011-11) Hue, Ryan; Vatassery, Rajan; Hinke, Jon; Mann, Kent; Blank, David; Gladfelter, Wayne
    We deconstruct the DSSC and focus on the sensitization mechanism to extract a thorough understanding of the charge separation process. Our study of the dye's interactions with the nanoparticles provides details about the attachment, the surface environment and the ability for the dyes to inject electrons in competition with loss mechanisms.