A new combined joules supercritical rankine cycle exergetic analysis and optimization

The application of a supercritical Rankine cycle in combined cycles does not happen in today’s thermoelectric power stations. Nevertheless, the most recent development in gas turbines, that allows a high efficiency and high exhaust gases temperatures, and the improvement of high pressure and temperature alloys, makes this cycle possible. This study’s intent is to prove the viability of this combined cycle, since it can break the 60% efficiency barrier, which is the plafond in actual power stations. To attain this target, several configurations for this cycle have been simulated, optimized and analyzed [1]. The simulations were done with the computational program IPSEpro [2] and the optimizations were effectuated with software developed for the effect, using the DFP method [3]. In parallel with the optimization that claims the cycle’s efficiency maximization, an exergetic analysis was also made [4] to all the cycle components. In opposite to what happens in subcritical combined cycles, it was demonstrated that in supercritical combined cycles the higher efficiency takes place with a single steam pressure in the heat recovery steam generator (HRSG).

Educação intercultural

Dissertação de Mestrado, Observação e Análise da Relação Educativa, Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, 2007

Os montes da serra de Tavira

The human occupation of the Tavira ridge is characterised by a network of small agglomerations of buildings (known as ‘montes’) belonging to the proprietors of lands around them. This way of organising places is, by and large, extensive to an important area of the schist mountains that stretch from Alentejo to Algarve, from the Guadiana river to the Atlantic Ocean. However, within the scope of that larger entity, the Tavira ridge appears as a sub-unit with traits of its own, which may be attributed not only to biophysical conditions, but also to the historical circumstances associated to the settlement of the territory. This particular ridge, which was confined to the perimeter of the Tavira municipality during the days of the Old Regime, has been more densely populated, due to its lack of interior hierarchisation, unlike what happens in neighbouring sub-units, both in terms of agglomeration sizes and of the property system itself. The traditional architecture of these areas was usually reduced to the bare essentials, reflecting the adverse conditions that generally surrounded the local economies. As can easily be gleaned from the plans shown here, the groupings of edifices that define the ridge’s settlement are largely characterised by the aggregation of buildings belonging to various owners, often intent on achieving a prominent position in the landscape.

Bacterial peroxide forming enzymes

Dissertação de mestrado, Engenharia Biológica, Faculdade de Ciências e Tecnologia, Universidade do Algarve; Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2015