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Experimental Activity on a Large SOFC Generator - - Bog - Nova Science Publishers Inc - Plusbog.dk

Experimental Activity on a Large SOFC Generator - - Bog - Nova Science Publishers Inc - Plusbog.dk

The Multiscale Analysis Group of the Politecnico di Torino (Italy) is involved in the experimental analysis and modelling of the CHP-100 SOFC Field Unit built by Siemens Power Generation Stationary Fuel Cells (SPG-SFC). The experimental analysis of a large SOFC generator in operation is a complex task, due to the large number of variables which affect its operation, the limited number of measurements points in the generator volume, the necessity to avoid malfunctions in the real operation. As a consequence, the experimental analysis of the CHP-100 SOFC Field Unit has been developed with methods of Design of Experiments, and with a statistical analysis of the collected data. The experimental sessions have been designed in order to investigate the effect of two important operation factors in order to characterise the operation of the single sectors of the SOFC generator, and to obtain the sensitivity maps of the main investigated dependent variables. Furthermore, the main result is the estimation of the local values of fuel utilisation of the various sectors of the generator, through the combination of the experimental voltage sensitivity analysis to overall FC and an analytical model of polarisation, to outline the distribution of fuel inside the generator. Finally, the sectors of the generator, of different pedigree and position, are compared in terms of the polarization effects, showing how the local fuel utilisation and temperature affect the estimated local anode exchange current density values.

DKK 366.00
1

Tøffe en traktor med hemmeligheder - Suza Kolb - Bog - LAMBERTH - Plusbog.dk

Tøffe en traktor med hemmeligheder - Suza Kolb - Bog - LAMBERTH - Plusbog.dk

Fra Mikkel hører Tøffe om landbrugsmessen, hvor der er mange spændende nye ting om bl.a. økologi.Tøffe er nysgerrig og videbegærlig, men Jensen er mere tilbageholdende og synes, at man skal holde sig til det, man ved, hvad er. Tøffe tager selv ind på messen og finder nogle afgrøder, han mener gården kan have gavn af, og tilsår i al hemmelighed nogle forsøgsmarker, som viser sig at være rigtig gode. Sød fortælling om den entusiastiske traktor Tøffe, der opsøger ny viden om afgrøder og fødevarer og kan lære små traktornørder om landbrug.

DKK 384.00
1

Using Sequence Generator Pro and Friends - Alex Mcconahay - Bog - Springer Nature Switzerland AG - Plusbog.dk

Using Sequence Generator Pro and Friends - Alex Mcconahay - Bog - Springer Nature Switzerland AG - Plusbog.dk

This guide is specifically aimed at those who are using—or want to use—Sequence Generator Pro. SGP is a “session management” software package that controls the telescope, mount, camera, and ancillary equipment to target and secure images during a night of imaging astronomical objects. The book begins with a special tutorial to get up and running with SGP. With a comprehensive reference section, it takes the user in detail through the various aspects of user and equipment profiles, equipment definitions, the sequencer, and other essential elements of SGP. Finally, it focuses on how to get the most out of the ancillary programs—target data bases, autoguiders, plate solvers, weather, observatory control, and other applications. Oftentimes, technical guides can end up being far denser than the processes they intend to explain. Many of the insights provided by SGP expert Alex McConahay are beyond what can be found in the official program documentation. In this book, the reader will find in-depth, yet straightforward practical advice on how to automate nightly astro-imaging sessions with Sequence Generator Pro.

DKK 278.00
1

Tøffe en traktor på eventyr - Suza Kolb - Bog - LAMBERTH - Plusbog.dk

Tøffe en traktor på eventyr - Suza Kolb - Bog - LAMBERTH - Plusbog.dk

Tøffe kan mange ting og er en uvurderlig hjælp på familien Jensens gård. Men da vennerne mejetærskeren Majbritt og Mælkebilen Mikkel, som kommer længere omkring, fortæller om deres oplevelser, får Tøffe lyst til at komme ud og se lidt mere af verden. På sin rejse møder han mange andre traktorer som f.eks. er specialiserede i at plukke frugt, fælde træer og vande. Tøffe får lov at prøve, hvordan de arbejde, men ender med igen at ville hjem til gården, hvor hans egne kompetencer passer ind og hvor han er savnet. Sød fortælling om en personificeret traktor, der kan lære små traktornørder om forskellige former for landbrug og traktorer.

DKK 384.00
1

Wind Turbine Generator Impacts to Marine Vessel Radar - Ocean Studies Board - Bog - National Academies Press - Plusbog.dk

Wind Turbine Generator Impacts to Marine Vessel Radar - Ocean Studies Board - Bog - National Academies Press - Plusbog.dk

Offshore wind energy development is poised to expand rapidly across the U.S. Outer Continental Shelf over the next decade, as part of a government-wide effort to develop more renewable sources of energy. Offshore wind energy planning and development has expanded along the U.S. Atlantic Coast, and to areas in the Gulf of Mexico and Pacific Coast. However, the maritime community has expressed concern that wind turbine generators, which are constructed predominantly of steel, can interfere with radar used in navigation. A particular concern is interference with marine vessel radar, which is a critical instrument for navigation, collision avoidance, and use in search and rescue missions, with secondary uses including activities like detecting reflectors on fishing nets or birds to indicate the presence of schools of fish. Previous studies of the impacts of wind turbine generators on radar relied on data from European wind farms - however, wind turbines located in or planned for the U.S. Outer Continental Shelf are larger, wider, and laid out in different configurations. Conducted at the request of the Bureau of Ocean Energy Management, this report identifies and characterizes the impacts of wind turbine generators on the efficacy of marine vessel radar on vessels operating within or near existing and planned offshore wind facilities on the U.S. Outer Continental Shelf. The report recommends pursing two courses of action to reduce impacts by: (1) filling knowledge gaps through data collection, modeling and analysis, and focused research on wind turbine generator characteristics; and (2) pursuing practicable options to reduce interference on marine vessel radar such as enhanced operator training, use of radar reflectors on small vessels, use of reference buoys, evaluation of radar mounting procedures, new radar designs, and the development of wind turbine generators with reduced radar signatures. Table of ContentsFront MatterSummary1 Introduction2 Impacts of Wind Turbine Generators on Marine Vessel Radar3 Mitigating Solutions for Wind Turbine Generator Effects on Marine Vessel Radar4 Key Findings, Conclusions, and RecommendationsAppendix A: Committee BiographiesAppendix B: Acronym List

DKK 253.00
1

Motors & Generators - - Bog - THAMES & KOSMOS - Plusbog.dk

Motors & Generators - - Bog - THAMES & KOSMOS - Plusbog.dk

Electric motors and generators are in countless devices, appliances, and vehicles we use every day. They are an essential technology in our modern world. With this kit, you can conduct 25 experiments to learn how an electric motor converts electricity into motion, and how an electric generator does just the opposite, converting motion into electricity. The electric motor is made of transparent plastic to show how the inside components work. Set up the motor to run on battery power and learn how a motor works. Then reconfigure the device to work in reverse as a hand-crank electric generator. Experiment with magnets to learn about the force of magnetism, and how magnetic fields relate to electric current. Build simple circuits consisting of the motor or generator, wires, and a light bulb to learn about the flow of electricity. Learn about gears and drive-trains and how they work to effectively convert kinetic energy into electrical energy and back again. The full-colour, 48-page manual guides your experiments with step-by-step instructions.

DKK 339.00
1

Lasse og traktoren - Johan Anderblad - Bog - Lamberth - Plusbog.dk

Lasse og traktoren - Johan Anderblad - Bog - Lamberth - Plusbog.dk

Lasse skal i seng, men han må lige rydde sit legetøj af vejen først. Legetøjskassen er tung. Det ville være fint, hvis man havde en traktor, tænker Lasse. Inden han lægger sig til at sove, ligger han og tænker på det med traktoren og spørger sin mor, som kommer for at putte ham, om hun nogensinde har kørt traktor. Det har hun. Selvfølgelig har hun det, for hun har jo engang arbejdet på en bondegård. Lasses mor ved alt muligt om livet på en bondegård og de store maskiner, man bruger der, og den fortælling bliver Lasses godnathistorie ... Underholdende fakta med mor i 'helterollen'.

DKK 384.00
1

Tøffe - Travlhed og ny teknik - Suza Kolb - Bog - LAMBERTH - Plusbog.dk

Tøffe - Travlhed og ny teknik - Suza Kolb - Bog - LAMBERTH - Plusbog.dk

Hvad var det? Tøffe står i laden og drømmer fredeligt, da den bliver vækket af en ukendt lyd. Og da den unge traktor næste dag kører en runde på gården, tror den næppe sine egne forlygter: En mærkelig maskine, kører rundt på marken med vinterhvede ... Det mærkelige køre-tøj, som viser sig at være en robot på afveje, skaber også problemer andre steder! Heldigvis ender alt godt, da Tøffe og vennen Vanja lærer den bedre at kende. Sød og lærerig fortælling om den personificerede traktor Tøffe, som også handler om at vænne sig til nye ting, der, indtil man lærer dem at kende, måske kan gøre én lidt usikker.

DKK 384.00
1