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The solar furnace research project at Valparaiso University utilizes a decoupled solar thermal electrolysis process for the production of H2 from water. We are focusing on an iron oxide system, which involves the conversion of magnetite to hematite in a cyclical process. Our experimental study for the iron oxide system confirmed that the electrolytic oxidation and thermal reduction steps of the metal oxide occur in a laboratory scale environment. Unfortunately, some of the Fe+3 products for the magnetite system stays in solution when the electrolysis is done in a strong acid. We needed to develop methods to quantify the fraction of iron remaining in solution in order to maximize solid phase recovery. Our analyses provide data consistent with the expected Fe+2: Fe+3 ratio. We will continue with improving solid phase hematite recovery

Extra Dollars For You

If the end of the month finds you dodging th ~ laundry-bill collector or borrowing money for a cup of coffee in the Union, it\u27s time to give your spend in ~ and budgeting habits a checkup

Why do people buy virtual items in virtual worlds? an empirical test of a conceptual model

While organizations in software industry want to portray themselves as professional in terms of following standards and methods, they may also have needs for improvising and short-cutting when necessary. Such dilemmas of dual logics are sometimes internally resolved by evolving a false belief of what is done (practice) being in correspondence to what is said (standards), regardless of what an empirical investigation might show, something that can have poor business implications and also poor social implications. Particularly focusing on this latter point, the meta-methodology of total systems interventions (TSI) has been used for integrating critical systems theory with total quality management, improving social conditions in parallel with improving business processes. Although TSI is not designed for liberating organizations where nobody see themselves in need of liberation, the hypothesis of this paper is that it is possible to design quality management systems as “conflict machines”, causing sufficient social tension for more or less automatically changing “fake quality” into “real quality”. The hypothesis is investigated by applying design research in a Scandinavian public sector organization. The findings consist of statistical and interpretative evidence for the success of the approach, making a contribution to how TSI can be applied in the software industry

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The solar furnace research project at Valparaiso University utilizes a decoupled solar thermal electrolysis process for the production of H2 from water. We are focusing on an iron oxide system, which involves the conversion of magnetite to hematite in a cyclical process. Our experimental study for the iron oxide system confirmed that the electrolytic oxidation and thermal reduction steps of the metal oxide occur in a laboratory scale environment. Unfortunately, some of the Fe+3 products for the magnetite system stays in solution when the electrolysis is done in a strong acid. We needed to develop methods to quantify the fraction of iron remaining in solution in order to maximize solid phase recovery. Our analyses provide data consistent with the expected Fe+2: Fe+3 ratio. We will continue with improving solid phase hematite recovery

The value of CO2-geothermal bulk energy storage to CO2

Two primary challenges for modern societies are to reduce the amount of carbon dioxide (CO2) that is emitted to the atmosphere and to increase the penetration of renewable energy technologies into electricity systems. CO2-bulk energy storage (CO2-BES) is a CO2 capture and storage (CCS) approach that can address both of these challenges by using CO2 emitted from large point sources (e.g., fossil fuel power plants, cement manufacturers) that is sequestered in sedimentary basin geothermal resources to take power from, and deliver power to, electricity grids. Electricity can be generated by wind and solar energy technologies regardless of whether there is demand for that electricity because wind and sunlight are variable resources. When over-generation occurs, the excess electricity can be used to compress and inject CO2 into sedimentary basin geothermal resources. Electricity can then be dispatched when needed by producing the pressurized and geothermally-heated CO2 from the storage reservoir and converting the heat to electricity in a CO2-geothermal power plant. In this way, CO2-BES can time-shift excess electricity that is generated by wind and solar energy facilities to when there is demand for that electricity. This ability can increase the utilization of installed wind and solar energy capacity. Thus, CO2-BES can (1) directly reduce CO2 emissions to the atmosphere by isolating them in porous and permeable subsurface reservoirs and (2) indirectly reduce CO2 emissions by displacing electricity from power plants that emit CO2 (e.g., fossil fuel plants) with electricity from wind and solar energy facilities. We present an approach to estimate the value of these direct and indirect benefits. Our approach uses an optimization model that we developed to determine the cost-minimizing dispatch of electricity-generating facilities to meet diurnal demand in regional electricity systems. In our analysis, electricity can be generated by base load and variable load power plants, wind- and solar-energy technologies, and CO2-BES facilities. We varied prices on CO2 emissions (e.g., a CO2 emissions tax) in order to determine the optimal CO2-BES storage capacity for each CO2 price. This method allows us to assign a monetary value to the optimized energy storage capacity. We use time increments of one hour, during which we assume electricity generation and demand are constant. Initial results using hypothetical but realistic scenarios for electricity demand and electricity generation by solar energy technologies suggest that the optimal energy storage capacity of CO2-BES is sensitive to a range of CO2 prices. That is, a small increase in the price on CO2 emissions can cause substantial change in the optimal distribution of electricity generation and the energy storage capacity of CO2-BES. Thus, independent system operators (ISOs) could dispatch CO2-BES without needing additional ancillary service compensation schemes if CO2 emissions were modestly taxed. This work was funded by the U.S. National Science Foundation Sustainable Energy Pathways program (grant 1230691)

Designing a Calorimeter to Calibrate an Optical Radiative Flux Measurement System to Find the Power Entering a Solar Reactor

A solar furnace has been constructed at Valparaiso University to test the performance of various solar chemical reactors. A primary performance index of a solar chemical reactor is the efficiency, or the fraction of the energy that enters the reactor that is utilized in the chemical reaction. To calculate this efficiency, we must first know how much solar power is entering the reactor. An optical radiative flux measurement system has been developed that gives the solar flux distribution over the aperture of the reactor, but must be calibrated to provide the actual power level. Therefore, a calorimeter was designed and built to perform this calibration. The calorimeter is designed so that the solar power entering the aperture is transferred to water flowing through the tubes that make up the cavity. Then, by measuring the flow rate of the water and the temperature of the water at the inlet and outlet, the energy entering the calorimeter can be calculated using the first law of thermodynamics. The uncertainty in the calculated power level has also been established through a thermal loss and measurement uncertainty analysis

The Iowa Homemaker vol.35, no.9

Rainwear Trends, Betty Gregory, page 2 Turntable Potters-Wheel, Donna Schneider, page 7 Veishea has Changed, Martha Elder, page 8 Picnic, Marilyn Ogland, page 10 Destination - Europe, Jane Takehara, page 12 It’s Spring! Spots Must Go, page 13 “I Like Black In My Dorm Room”, Anne Parks, page 1

Development of a Solar Rotary-Kiln Reactor for the Reduction of Metal Oxide Particles

A solar rotary-kiln reactor has been fabricated for the reduction of metal oxide particles at ~1650 K as part of a solar thermal decoupled water electrolysis process for the production of hydrogen. Particle motion is controlled through the reactor’s angular speed of rotation. At rotational speeds greater than 65 rpm, the internal walls of the reactor are fully covered with particles. Simultaneously, mixing elements generate a particle cloud in the reactor in order to increase the absorption of incident solar radiation. A model of the reactor that solves the energy conservation equation and includes the kinetics of the metal oxide reduction suggests that peak thermal efficiencies of 47 percent are possible for the reduction of hematite to magnetite. In parallel, the solid state kinetics for the reduction of cobalt oxide (a promising alternative to iron oxide) in a low oxygen partial pressure atmosphere has been determined. Reduction follows the shrinking core model and is initially limited by the rate of oxygen diffusion in the gas phase and later limited by the chemical kinetics at the shrinking reactive interface. Regression of the model to isothermal and non-isothermal thermogravimetric analyzer data yielded the temperature-dependent reaction rate parameters

The Iowa Homemaker vol.35, no.12

The Family Gives Thanks, Dr. E. W. Remley, page 5 Better Planning For Better Living, Margot Copeland, page 6 To Win, Decorate Your Room!, page 8 “Sweater Dress-Up”, Sue Mullins, page 10 Introducing: Rose Liu From Formosa, Margot Copeland, page 11 Dr. P. Mabel Nelson, Amy Millen, page 12 Extra Dollars For You, Marilyn Ogland, page 14 Connaisseur De La Cuisine, Martha Burleigh and Martha Elder, page 15 Trends To A New Figure, Anne Beem, page 16 Glasses… For Modern Lasses, Donna Schneider, page 17 What’s New, Pat McBride, page 1