Use of alternative fuels obtained from renewable sources in brayton cycles

Analysis and simulation of the behaviour of gas turbines for power generation using different nonconventional fuels obtained from different renewable sources are presented. Three biomass-tobiofuel processes are considered: anaerobic digestion of biomass (biogas), biomass gasification (synthesis gas) and alcoholic fermentation of biomass and dehydration (bioethanol), each of them with two different biomass substrates (energy crops and municipal solid waste) as input. The gas turbine behaviour in a Brayton cycle is simulated both in an isolated operation and in combined cycle. The differences in gas turbine performance when fired with the considered biofuels compared to natural gas are studied from different points of view related with the current complex energetic context: energetic and exergetic efficiency of the simple/combined cycle and CO2 emissions. Two different tools have been used for the simulations, each one with a different approach: while PATITUG (own software) analyses the behaviour of a generic gas turbine allowing a total variability of parameters, GT-PRO (commercial software) is more rigid, albeit more precise in the prediction of real gas turbine behaviour. Different potentially interesting configurations and its thermodynamic parameters have been simulated in order to obtain the optimal range for all of them and its variation for each fuel.

Use of alternative fuels obtained from renowable sources in Brayton cycles

Analysis and simulation of the behaviour of gas turbines for power generation using different nonconventional fuels obtained from different renewable sources are presented. Three biomass-tobiofuel processes are considered: anaerobic digestion of biomass (biogas), biomass gasification (synthesis gas) and alcoholic fermentation of biomass and dehydration (bioethanol), each of them with two different biomass substrates (energy crops and municipal solid waste) as input. The gas turbine behaviour in a Brayton cycle is simulated both in an isolated operation and in combined cycle. The differences in gas turbine performance when fired with the considered biofuels compared to natural gas are studied from different points of view related with the current complex energetic context: energetic and exergetic efficiency of the simple/combined cycle and CO2 emissions. Two different tools have been used for the simulations, each one with a different approach: while PATITUG (own software) analyses the behaviour of a generic gas turbine allowing a total variability of parameters, GT-PRO (commercial software) is more rigid, albeit more precise in the prediction of real gas turbine behaviour. Different potentially interesting configurations and its thermodynamic parameters have been simulated in order to obtain the optimal range for all of them and its variation for each fuel.

The Conservation of our Built Heritage, in Particular Statues in Aberdeen, Evaluated Through a Social and Historical Context and Their Impact, Through the Use of 3D Scanning

Cultural heritage sites all over the world are at risk due to aggressive urban expansion, development, wars and general obsolescence. Not all objects are recorded in detail although they may have social and historical significance. For example more emphasis is placed on the recording of castles and palaces than on crofters’ cottages or tenement blocks, although their history can be just as rich. This paper will investigate the historic fabric of Aberdeen through the use of digital scanning, supported by a range of media including old photographs and paintings. Dissemination of social heritage through visualisations will be explored and how this can aid the understanding of space within the city or specific area. Focus will be given to the major statues/monuments within the context of the city centre, exploring their importance in their environment. In addition studying why many have been re-located away from their original site, the reasons why, and how we have perhaps lost some of the social and historical importance of why that monument was first located there. It will be argued that Digital Media could be utilised for much more than re-creation and re-presentation of physical entities. Digital scanning, in association with visualisation tools, is used to capture the essence of both the cultural heritage and the society that created or used the sites in association with visualisation tools and in some way re-enacting the original importance placed upon the monument in its original location, through adoption of BIM Heritage.

To what extent may undergraduate students of history be trained in the use of the sources?

Mode of access: Internet.

A grammar of the Hebrew language : comprised in a series of lectures; compiled from the best authorities, and typically from Oriental sources, for the use of students in the universities /

Mode of access: Internet.

Manures: their sources, composition, and application : specially written for the use of farmers, agricultural students, etc.

Mode of access: Internet.

Violin-making, as it was and is : being a historical, practical, and theoretical treatise on the science and art of violin-making, for the use of violin makers, and players, amateur and professional.

Mode of access: Internet.

The five orders of architecture : containing the most plain and simple rules for drawing and executing them in the purest style, for the use of workmen : exhibiting the most approved modes of applying each in practice, suitably to the climate of Great Britain ; including an historical description of Gothic architecture, illustrated with specimens selected from the most celebrated structures now existing, and numerous plans, elevations, sections, and details of various buildings executed by architects of great eminence : to which are added treatises on projection, perspective, fractions, decimal arithmetic, &c. ...

Includes index.

Elements of useful knowledge. Volume I. Containing a historical and geographical account of the United States; for the use of schools.

Shaw and Shoemaker 19178.

Elements of useful knowledge. Vol. I. Containing a historical and geographical account of the United States; for the use of schools.

Mode of access: Internet.

An elementary treatise of the application of trigonometry to orthographic and stereographic projection, dialling, mensuration of heights and distances, navigation, nautical astronomy, surveying and levelling : together with logarithmic and other tables; designed for the use of the students of the university of Cambridge, New England /

Cover: Farrar's topography.

The historical reader : designed for the use of schools and families, on a new plan /

Mode of access: Internet.

The evangelical primer : containing a minor doctrinal catechism, and a minor historical catechism : to which is added the Westminster Assembly's Shorter catechism, with short explanatory notes, and copious Scripture proofs and illustrations : and an appendix containing various directions for studying the Scriptures : for the use of families and schools /

Title entered in the District Clerk's Office, District of Massachusetts, in 1825.

The evangelical primer : containing a minor doctrinal catechism; and a minor historical catechism : to which is added the Westminster Assembly's Shorter catechism : with short explanatory notes and copius Scripture proofs and illustrations : for the use of families and schools /

Printed wrappers dated 1826.