5 research outputs found

    The feasibility energy analysis of catalagzi thermal electricity power plant for district heating application [ÇatalaGzi termIk elektrIk santralI Ile bÖlgesel isitma yapilabIlIrlIGIn enerjI analIzI]

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    In a conventional coal-fired power plant, which is only designed for electricity generation, while nearly 1/3 of fuel energy can be converted to useful energy, the other part of the energy is wasted as stack gases and cooling water of condensers. This waste energy could be recovered by modifying the plant as cogeneration system. It is possible to employ district heating by cogeneration system which generates both electricity and useful heat at the same time. In this study, Catalagzi Thermal Electricity Power Plant has been converted a cogeneration system in order to reduce waste energy amount that is transferred to the cooling water of condensers. To simply the steam extraction point, four different cycle model have been developed and the most appropriate steam extraction point has been identified. Steam extraction ratio has been increased from 0 to 0.5 in the amount of 0.05 and energetic analysis has been made for each case. The resuts have been showed that the most appropriate steam extraction point is the point that has made energy efficiency ratio maximum in power plant. © 2017 TIBTD Printed in Turkey

    Supercritical Fluid Extraction Using CO 2

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    Body mass index and complications following major gastrointestinal surgery: A prospective, international cohort study and meta-analysis

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    Aim Previous studies reported conflicting evidence on the effects of obesity on outcomes after gastrointestinal surgery. The aims of this study were to explore the relationship of obesity with major postoperative complications in an international cohort and to present a metaanalysis of all available prospective data. Methods This prospective, multicentre study included adults undergoing both elective and emergency gastrointestinal resection, reversal of stoma or formation of stoma. The primary end-point was 30-day major complications (Clavien–Dindo Grades III–V). A systematic search was undertaken for studies assessing the relationship between obesity and major complications after gastrointestinal surgery. Individual patient meta-analysis was used to analyse pooled results. Results This study included 2519 patients across 127 centres, of whom 560 (22.2%) were obese. Unadjusted major complication rates were lower in obese vs normal weight patients (13.0% vs 16.2%, respectively), but this did not reach statistical significance (P = 0.863) on multivariate analysis for patients having surgery for either malignant or benign conditions. Individual patient meta-analysis demonstrated that obese patients undergoing surgery formalignancy were at increased risk of major complications (OR 2.10, 95% CI 1.49–2.96, P < 0.001), whereas obese patients undergoing surgery for benign indications were at decreased risk (OR 0.59, 95% CI 0.46–0.75, P < 0.001) compared to normal weight patients. Conclusions In our international data, obesity was not found to be associated with major complications following gastrointestinal surgery. Meta-analysis of available prospective data made a novel finding of obesity being associated with different outcomes depending on whether patients were undergoing surgery for benign or malignant disease
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