DC-DC Converter Design for Battery-Operated Systems Harry Arbetter. Robert Erickson. and Dragan Maksimovid Power Electronics Group Department of Electrical and Computer Engineering University of Colorado‚ Boulder‚ CO 80309-0425 USA Abstrurt - This paper describes performance‚ design and optimization of de-dc converters for energy limited‚ battery operated systems. Variable-frequency operation is used to achieve voltage regulation and high efficiency for an extremely wide range of load currents
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ChE 101 Lab Exercise 4 05 December 2012 Materials Balance (Non-reacting Systems) THR/WRU 1. A 40-mol-% aqueous ethanol solution is to be distilled into two streams: a distillate with 98% ethanol and a side stream with 60%. 98% of the alcohol in the feed is to be recovered in these two products; only 2% goes into the bottoms. If the bottoms product contains 2% ethanol‚ calculate the amount of the different streams per 1000 kmol of feed stream. Given: Recovery = 98% of ethanol in
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Associated with Battery Disposal: Summary A significant component of our day to day lives is batteries‚ but what many do not know is that the disposal of batteries is actually equally as important. This is a job that is so imperative that‚ if not done correctly‚ can cause excessive harm to the environment and ourselves. The problem does not lie with the batteries per say‚ but the by-products and materials they are made of can become quite dangerous to us and our earth. The number of batteries that are
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because of some factors that give an impact to the archival materials. The factors are divided into two groups which is inherent factor and external factor. Compare to external factor‚ inherent factor is the biggest responsible for deterioration of archival materials. According to M.C. Onwubiko‚ the main factor in inherent factor is acidity that contain in the paper itself or from the atmosphere. The major causes of deterioration of paper materials in acidity. At the earlier century there is papyrus before
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MATERIAL HANDLING EQUIPMENT INTRODUCTION • • • Material handling refers to efficient short-distance movement of goods that usually takes place within the confines of a building such as a plant or a warehouse or between a building and a transportation agency. Material handling equipment is equipment that relate to the movement‚ storage‚ control and protection of materials‚ goods and products throughout the process of manufacturing‚ distribution‚ consumption and disposal. Material handling equipment
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thinking skills necessary to write a basic‚ college-level analytical essay. You may type directly into this file and then upload when finished. Remember that you need to connect what you read in the book to what you are learning from other course materials to complete you answers. Step I: Basic‚ factual analysis of a reading 1. List three examples of events/methods from Voltaire’s Candide which you believe best illustrate the issues related to the Scientific Revolution and to the Enlightenment
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com/fatherofchemistry Objective To determine the activation energy for the reduction of peroxodisulphate(VI) ions. S2O82-‚ by iodide ions I-‚ using a ’clock’ reaction. Principle The equation for reduction of S2O82- by I- is: S2O82- + 2I- → 2SO42- + I2 The formation of iodine is ’monitored’ by small & known amount of thiosulphate ions‚ S2O32-: 2S2O32- + I2 → S4O62- + 2I- Once the reactants are mixed
Free Chemical reaction Chemical kinetics Reaction rate
Materials Used for the Engine Block The engine is the single most important part of the automobile. Without it‚ the car simply will not move. It is important that the cylinder or engine block is built to withstand the high temperatures and pressures that are put into it and it is equally important that the engine block is built to last. Over the years‚ materials used for making engine blocks have changed and materials sciences have matured enough to find the best possible materials to build engine
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DIFFERENT CONSTRUCTION MATERIALS OF FURNITURE Woods & Synthetic Woods Hardwood Solids Solid wood furniture is considered the best quality furniture on the market‚ and if you are purchasing furniture that will be in your home for a long time‚ it is a very smart investment. Even with wear‚ solid wood gains character and charm and becomes a part of your family. Solid wood furniture is usually crafted with attention to detail that includes dovetailed joints‚ wood on wood drawer glides‚ and
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ME 338: MECHANICS OF MATERIALS LAB (0‚1) Table of Contents Introduction to the lab equipment and safety precautions 1. Compression of a spring a. To obtain the relationship between the forces applied to a compression spring and its change in length. b. To determine the stiffness of the test spring (s). 2. Extension of a spring a. To obtain the relationship between the forces applied to an extension spring and its change in length. b. To
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