Microturbina e chiller

be recovered for a useful purpose. The following low grade heat energy powered systems have been modelled under ISO ambient conditions (international standard organisation), i.e. 15ºC and 1 bar, to utilise the waste heat energy of a 200kW microturbine combined with a single effect absorption chiller, an organic ranking cycle using R245fa (ORC-R245fa) as a working fluid, a multi-effect distillation desalination (MED) and or a thermal vapour compression MED Desalination unit (TVC-MED). The thermal comparison was carried out based on an energy and exergy analysis in terms of electric efficiency, exergetic efficiency, carbon footprint, and energy utilisation factor (EUF). The software package called IPSEpro, has been used to model and simulate the proposed power plants. As a result, utilising the exhaust waste heat energy in single-effect absorption chillier has contributed to stabilise ambient temperature fluctuation, and gain the best exergetic efficiency of 39%, while the EUF has reached 72% and the carbon foot print was reduced by 75% in MED and TVC-MED Desalination respectively. The results also reveal that TVC-MED is more efficient than traditional MED as its gain output ratio (GOR) is improved by 5.5%. In addition, ORC-245fa generates an additional 20% of the microturbine electricity generation. 1. Introduction Microturbines are small components of modern electricity generators that burn gaseous and liquid fuels, creating high-speed rotation…

diminuir ao longo dos anos. Even though energy prices have increased the desalting cost have been decreasing. Mesmo que os preços de energia aumentaram o custo de dessalinização vêm diminuindo. The cost of obtaining and treating water from conventional sources has tended to increase because of the increased levels of treatment being required in various countries to meet more stringent water quality standards. O custo de obtenção e tratamento de água a partir de fontes convencionais tende…

do Nordeste brasileiro; entretanto, é necessário que se considerem os riscos ambientais decorrentes, isto porque, na dessalinização se gera, além da água potável, uma água residuária (rejeito), altamente salina e de poder poluente elevado. No presente texto são revisados trabalhos conduzidos no Brasil e em outros paises, os quais utilizam diversas alternativas para a destinação e o uso deste rejeito. Palavras-chave: dessalinizador, rejeito, impacto ambiental, salinidade Disposal of…

Karla Philippini da Silva, Instituto SENAI de Tecnologia em Meio Ambiente – DR/PE. Associação Instituto de Tecnologia de Pernambuco – ITEP/OS - Mestrado Profissional em Tecnologia Ambiental, Recife Pernambuco Brasil, helida.silva@pe.senai.br* Dissertação (Mestrado Profissional em Tecnologia Ambiental)- Associação Instituto de Tecnologia de Pernambuco- ITEP, 2014. ABSTRACT Fouling of…

de alface, embora as perdas de produção tenham aumentado com a salinidade, (6 a 8% por unidade de condutividade elétrica) , chegando a 28-35% para a solução totalmente preparada com água de rejeito. O cv. Quatro Estações mostrou maior tolerância à salinidade do que Verônica. Palavras-chave: Lactuca sativa L., água salina. ambiente protegido. ABSTRACT Hydroponic lettuce production on coconut fiber using desalination wastewater The scarcity of good quality water has led to the…

salgada. ABSTRACT IN ENGLISH The planet Earth is rich in many resources, a major, is water, which is responsible for taking up 70 % of its surface. But under current conditions, it is becoming insufficient in some places and even scarce in drier regions; Thinking about the fact that without water it is impossible to survival of any living being, who see methods improving, so drinking water does not enter extinction were developed. One of the methods was developed for desalination…

Calcining Plant in Bahrain > Number of cells: 4 > Application: distillate for boiler feed and potable water > End user: Aluminium of Bahrain > Year of contract: June 1999 > Capacity: 4 x 12 300 m3/day MED-TVC Process > Client: Hitachi > Site: Peru > Number of cells: 2 > Top brine temperature: 70°C > Application: Power station > End user: Enersur > Contract date: December 1997 > Capacity: 2 x 1 300 m3/day MED-TVC Process > Client: YANBU CEMENT…

there is keen interest in sustainable energy technologies capable of improving efficiency and reducing environmental footprint. Membranes have the potential to play a significant role in a number of relevant separations applications, including CO2 capture, energy storage, and water production for energy production. This article seeks to highlight opportunities for membranes-related R&D relevant to sustainable energy, of which the broader membrane community may not be fully aware. We pose…

Equação 1 Onde par é a pressão de ar medida na entrada do injetor, Qar a vazão de ar. Os valores de Potar e Ri normalizados entre 0 a 1. Para evitar zeros em Potar*Ri, os valores normalizados de Potar e Ri foram adicionados de uma unidade, portanto seus intervalos possíveis passaram a ser de 1 a 2. Então foram obtidos os valores mínimos de Potar*Ri e determinados a variante do novo permeador com maior eficiência global e os valores ótimos de Ug para cada teste. 3. Resultados e…

inversa (RO) de água de poços, sobre o solo, localizados nas comunidades de Rajada e Uruás, no município de Petrolina-PE. Nessas comunidades estudadas, bem como em todas as comunidades do semi-árido brasileiro, os rejeitos da dessalinização são despejados em sistemas de drenagem natural, sem nenhum tratamento, podendo causar danos ao solo e meio-ambiente devido aos seus elevados teores de sais. PALAVRAS CHAVES: Salinidade, dessalinização, meio-ambiente ABSTRACT: This study is a survey of…