Search results for "stil"
showing 10 items of 1452 documents
La importancia social de la moda femenina burguesa a mediados del siglo XIX en Valencia
2002
El siglo XIX fue un período de permanente evolución en el modo de vestir femenino con cambios en el estilo, la manufactura y los tejidos. Todos estos cambios fueron debidos al desarrollo industrial, los avances técnicos, la evolución en los sistemas de trasporte y a la difusión de la publicidad, de los periódicos y de las revistas; reduciéndose, por tanto, los costes medios de producción y consiguiendo que aparentemente la moda fuese accesible a todo el mundo. Sin embargo, a primera vista, las diferencias continuaron y cualquiera podía clasificar socialmente a una mujer por su modo de vestir.
Application of advanced thermodynamics, thermoeconomics and exergy costing to a Multiple Effect Distillation plant: In-depth analysis of cost formati…
2015
Abstract The high thermal energy consumption per m3 fresh water is one of the main barriers to the spread of thermally driven desalination processes and has limited their use to applications in countries with high reserves of fossil fuels or to specific technological solutions like dual purpose cogeneration plants and solar desalination systems. Being energy conversion efficiency a major issue to improve the performance of thermally driven desalination plants, thermoeconomic analysis has been attracting the efforts of researchers for the identification of margins for process improvement. In this paper a rigorous exergy and thermoeconomic analysis is presented for an 8 effect forward feed Mu…
Thermoeconomic optimization of a renewable polygeneration system serving a small isolated community
2015
During the last years, special attention has been paid to renewable polygeneration technologies, able of simultaneously producing thermal, cooling, electrical energy and desalinated water from seawater. This paper focuses on an innovative polygeneration system driven by renewable energy sources, including the following technologies: hybrid photovoltaic/thermal collectors, concentrating parabolic trough (CPVT), a biomass heater, a single-stage absorption chiller and a multiple-effect distillation desalination system. The system is designed to cover the base load of an isolated small community. In previous papers, the dynamic simulation model about plant operation is discussed. In this paper,…
Exergetic and exergoeconomic analysis of a renewable polygeneration system and viability study for small isolated communities
2015
Abstract A great interest has recently arisen for the sustainable supply of energy and fresh water, due to the growing demand from developing countries. Facing this demand by traditional technologies implies evident risks related with the high cost of fossil fuels and their environmental impact. Then, alternative solutions based on the use of renewable sources and innovative technologies must be considered. In this paper a renewable polygeneration system is examined, which includes a solar field based on parabolic trough photovoltaic/thermal collectors, a biomass heater, an absorption chiller and a Multiple Effect Distillation desalination unit. Plant operation under dynamic conditions has …
Exergy analysis and thermoeconomic cost accounting of a Combined Heat and Power steam cycle integrated with a Multi Effect Distillation-Thermal Vapou…
2017
Abstract In this paper an exergy analysis and thermoeconomic cost accounting of a Combined Heat and Power steam cycle integrated with Multi Effect Distillation-Thermal Vapour Compression plant is performed; the goal of the study is to show how these methodologies provide a rational criterion to allocate production costs on electricity and freshwater in such a dual purpose system. After a brief overview on the methodology and a description of reference plant, exergy analysis is carried out to calculate exergy flows and exergy efficiencies at component level. A detailed description of the adopted thermoeconomic model is given. In a first scenario, cost accounting is performed assuming that th…
Reverse electrodialysis heat engine with multi-effect distillation: Exergy analysis and perspectives
2019
Abstract The increasing worldwide energy demand is rising the interest on alternative power production technologies based on renewable and emission-free energy sources. In this regard, the closed-loop reverse electrodialysis heat engine is a promising technology with the potential to convert low-grade heat into electric power. The reverse electrodialysis technology has been under investigation in the last years to explore the real potentials for energy generation from natural and artificial solutions, and recent works have been addressing also the potential of its coupling with regeneration strategies, looking at medium and large energy supply purposes. In this work, for the first time, a c…
Thermodynamic, Exergy, and Thermoeconomic analysis of Multiple Effect Distillation Processes
2018
Abstract Multiple effect distillation (MED) is nowadays the preferred technology for the construction of new plants based on thermal processes in the growing desalination market. MED technology, in fact, presents a number of advantages with respect to the more traditional multistage flash technology, among all the lower energy consumption achievable in MED plants. However, a large potential for improvement in terms of lowering production costs still exists, which stimulates further efforts on process optimization from companies and researchers involved in the field. Thermodynamic and exergy analysis provides useful insights regarding the identification of main inefficiencies and the margins…
"Todella hyvä uutinen!" : Facebookin uutisten saateteksti tekstilajina
2017
Tässä tutkielmassa tarkastelen Facebookissa jaettujen uutisten saatetekstejä. Aihe on ajankohtainen ja tärkeä, sillä uutisia seurataan yhä useammin sosiaalisen median palvelujen kautta. Sosiaalisessa mediassa uutisen otsikon, uutiskuvan ja ingressin lisäksi lukijaa lähestytään uutiseen liitettävän saatetekstin kautta. Saatetekstillä onkin paljon merkitystä siinä, päätyykö lukija avaamaan uutista. Saateteksti myös antaa lukijalle tietyn näkökulman aiheesta ja ohjaa täten lukijan ajattelua sekä uutisen ympärille kehittyvää keskustelua. Tarkoituksenani oli selvittää tutkielmassani, millaisen tekstilajin Facebookin uutisten saatetekstit muodostavat. Tutkielman lähtökohtana onkin tekstilajianaly…
Projekts: Ražošanas uzņēmuma SIA “MANILINI” dibināšana
2022
Maģistra darba mērķis ir projekts: jauna tekstilizstrādājumu ražošanas uzņēmuma – sabiedrības ar ierobežotu atbildību (SIA) - dibināšana un tā darbības un finanšu plāna izstrāde un analīze turpmākajiem trīs ar pus gadiem. Lielu atkritumu daļu pasaulē veido apģērba un tekstila izstrādājumi, ko veicina gan patērētāju vēlme pēc jauniem produktiem, gan tekstila izstrādājumu sarežģīta otrreizējā pārstrāde, turklāt tikai pavisam neliela daļa no tekstila atkritumiem tiek pārstrādā pilnīgi jaunos apģērbos. Lai mazinātu negatīvo ietekmi uz vidi, alternatīva ir izmantot tādus dabīgus materiālus kā linu. Lina audums ir dabīgs un tas neatstāj atkritumus, jo laika gaitā sadalās. Lina materiālam ir daudz…
SIA "New Rosme" finanšurādītāju analīze un novērtēšna
2016
Diplomdarba mērķis ir veikt uzņēmuma SIA „New Rosme” finanšu analīzi un ar iegūto rādītāju palīdzību konstatēt uzņēmumā radušās problēmas un meklēt risinājumus, lai turpinātu tā turpmāko attīstību. Uzņēmums 2014.gadā aizvēra 4 veikalus Krievijā, nestabilās ekonomikas dēļ. Šī iemesla dēļ, autore izvirza uzdevumu izvērtēt uzņēmuma finansiālo stabilitāti un noskaidrot vai pastāv maksātnespējas iespēja un draudi uzņēmuma turpmākai darbībai un attīstībai. Darbs sastāv no teorētiskās un praktiskās daļas: Teorētiskajā daļā autore apskatīs finanšu analīzes nozīmi un būtību. Praktiskajā daļā tiks veikti finanšu rādītāju aprēķini, balstoties uz teorētiskajiem aspektiem un SIA „New Rosme” finanšu pārs…