1,882,596 research outputs found
A power engineering and renewable energy engineering training facility utilising SMA’s Sunny Island Inverter
No full textMurdoch University’s engineering department has conceptualised the development of a training system for renewable energy and power engineering students based upon SMA’s Sunny Island inverter. The inverter operates using the droop control algorithm in which the control of real power flows alters network frequency and the control of reactive power flows alters the network voltage. By controlling the network frequency, the Sunny Island inverter is able to control the real power flows of other AC coupled inverters on the network. The system provides a simple, safe and localised learning tool whereby students are able to understand and interact with the system to understand the similarities in operation between the Sunny Island network and a large electricity network. The conversion of the existing system to a Sunny Island system involved the redesign and reconfiguration of a number of existing components in order to ensure compatibility with the new Sunny Island network. A number of compatibility issues were addressed and solutions presented to maximise the use of existing components and implement changes which allow a fully functional system in the future. A monitoring system was required to maximise the educational value of the system and enhance the visualisation of the Sunny Island’s operational characteristics. It was determined that SMA’s monitoring equipment was not capable of the sample rates required to detect transients in the AC network. A second monitoring system has been proposed utilising high-speed data acquisition equipment that is able to monitor at approximately 100 samples per cycle. This report sets a precedent for future work related to the training system’s physical development and allows for the continued development of the system into a fully-equipped Sunny Island system which is equipped with photovoltaic, wind and diesel generators; and whose operation can be visualised through the associated monitoring system
Sunny Stutzman
No full textSunny Stutzman grew up on his parents’ farm in Sangerville, Maine. Sunny’s father, Sid, was also a musician and song-writer, and the pair formed the “Doughty Hill Band,” which still performs and records. The band also features Sunny’s wife, Tracy, and Brian Smith. Sunny, though he carries on his parents’ love of farm life and music, did not follow in their footsteps and become a farmer. Instead, after completing a BA at the University of Maine-Farmington, he earned a graduate degree in Industrial Design from the Art Institute of Pittsburgh. He returned to Maine, worked in product development for Dexter Shoe and Moosehead Manufacturing before establishing Sunny Skies Design, which he currently owns. A more complete history of the Stutzman family is available at www.mainehighlandsfarmers.com/Stutzmanhttps://digitalcommons.library.umaine.edu/songstorysamplerartists/1042/thumbnail.jp
sunny-day-flooding-project/tutorials: v1.0.0
No full textFirst release of the Sunny Day Flooding Project tutorial repo. This repo contains a wiki of tutorials for constructing, programming, and deploying Sunny Day Flooding Sensors (SuDS) to measure coastal flooding
Interview with Armando Hugo Ortiz Guerrero
No full textCathy Ragland interviews music historian and author, Armando Hugo Ortiz Guerrero.https://scholarworks.utrgv.edu/cathyraglandrec/1003/thumbnail.jp
A Remote Area Power Supply (RAPS) Training Facility utilising SMA Sunny Island Inverter technology and National Instruments measurement package
No full textRAPS systems can sometimes be a cheaper alternative for supplying power than connection to a distant utility. Most assuredly it is a cleaner method of producing electricity than coal or gas constituents, provided the diesel generator is used minimally. A modern RAPS system will generally have several sources of generation, typically they might be; solar, wind and a diesel/petrol generator coupled with a battery to store excess power. The RAPS 2 system at Murdoch University was selected for an overhaul early in 2010. The system was redesigned to include new inverter technology from SMA. The new system relies on 3 separate inverters to convert the sources directly into grid quality electricity, as opposed to some traditional RAPS systems that would have most of its elements feed a DC bus that connected to a single inverter. This novel way of setting up a mini grid finds its niche in situations when the terrain or meteorological conditions make it impractical to have generation equipment all localised and a DC bus would have higher associated cable losses.
For such a system to be of educational benefit to tertiary students, the variables within the system must be able to be monitored. To this end an advanced measurement system has been designed and procured so that every measurable point in the upgraded system is available for display.
The measurement system was designed using National Instruments compact DAQ (data acquisition) hardware, one of the first of its type to be introduced to the university. The compact DAQ unit has been coupled with isolation equipment supplied by Dataforth, which already has an existing prevalence throughout the engineering department. The subsequent measurement program monitors 31 system variables at a high sampling rate to provide real time information on the state of the system. The measurement program also monitors relevant meteorological aspects such as the solar irradiance and local wind speed.
This report documents and details the steps taken to set up a new and novel RAPS system. Discussed are the approaches taken throughout the semester to project manage and facilitate progress. A detailed description is also given of the measurement and protection system that has been designed to allow students and the general public to get a good grasp on the performance of the system
Leggere il tempo. Conversazione sull’architettura sensibile di Armando Ruinelli
No full textArmando Ruinelli’s forty-year architectural experience, as documented in the recent publication Leggere il tempo, is characterised by its sensitivity and attention to context. Devoid of excess and extravagance, his work establishes a polite dialogue with its surroundings, reflecting the discreet personality of the author. At the core of Ruinelli’s practice lies a profound ethical consideration, extending beyond the design phase to encompass the entire spectrum of operational intricacies. His perspective on time translates into an acceptance of material aging, emphasising the importance of allowing buildings to follow their natural course. Rooted in context, his architecture seeks not only continuity but harmonious integration within the Alpine landscapes they inhabit. In dialogue with the interviewer, Ruinelli emphasises his preference for artisanal work, highlighting the significance of precision in execution and the centrality of humans over materials. His poetic exploration is manifested in creating atmospheres and carefully balancing the dynamic components of a project. Reflecting on the role of the architect, he envisions them as craftsmen endowed with both technical acumen and creative vision. Finally, Ruinelli shares a meaningful project – the fountains in the Soglio cemetery – a creation laden with delicacy and symbolism that underscores the spiritual depth of his work
Armando Grava "Rosa"
No full textFotografia di Armando Grava "Rosa", partigiano della Brigata "Tollot", Divisione "Nannetti", ucciso dai fascisti il 17 marzo 1945 a Revine (Treviso).1 fotografia in bianco e ner
Armando Grava "Rosa"
No full textFotografia di Armando Grava "Rosa", partigiano della Brigata "Tollot", Divisione "Nannetti", ucciso dai fascisti il 17 marzo 1945 a Revine (Treviso).1 fotografia in bianco e ner
Armando Grava "Rosa"
No full textFotografia di Armando Grava "Rosa", partigiano della Brigata "Tollot", Divisione "Nannetti", ucciso dai fascisti il 17 marzo 1945 a Revine (Treviso).1 fotografia in bianco e ner
Armando Grava "Rosa"
No full textFotografia di Armando Grava "Rosa", partigiano della Brigata "Tollot", Divisione "Nannetti", ucciso dai fascisti il 17 marzo 1945 a Revine (Treviso).1 fotografia in bianco e nero - un duplicato delle stesse dimension
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