دانلود مقاله ISI انگلیسی شماره 53446
عنوان فارسی مقاله

اثر رسوبات طرف آب بر عملکرد انرژی نیروگاه های حرارتی ذغال سنگ سوز

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
53446 2006 17 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Effect of water side deposits on the energy performance of coal fired thermal power plants
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Energy Conversion and Management, Volume 47, Issues 9–10, June 2006, Pages 1247–1263

کلمات کلیدی
رسوبات سمت آب؛ مقیاس بندی - انتقال حرارت؛ افت فشار؛ بهره وری بویلر؛ راندمان توربین؛ بازده کلی ناخالص؛ بازده کلی خالص؛ کنترل آلاینده
پیش نمایش مقاله
پیش نمایش مقاله اثر رسوبات طرف آب بر عملکرد انرژی نیروگاه های حرارتی ذغال سنگ سوز

چکیده انگلیسی

This paper presents the effects of water side deposits in the 210 MW coal fired thermal power plant components (viz., boiler, turbine, feed water heaters, condensers and lube oil coolers) on the energy efficiency of these components and that of the overall system at 100% maximum continuous rating (MCR). The origin, composition and rate of build up of deposits on the water side are presented. A linear growth rate of deposits is assumed for simplicity. The effects of the reduction in heat transfer, increased pressure drop and increased pumping power/reduced power output in the components are quantified in the form of curve fits as functions of the deposit thickness (μm). The reduction in heat transfer in the boiler components is in the range of 0.2–2.0% under normal scaling. The increased pumping power is of the order of 0.6–7.6% in the boiler components, 29% in the BFP circuit, 26% in the LPH circuit, 21% in the HPH circuit and 18% in the lube oil cooler circuits. The effects on the overall coal fired plant is quantified through functional relations between the efficiencies and the notional deposit thickness. The sensitivity indices to the notional deposit thickness are: boiler efficiency: −0.0021% points/μm, turbine circuit efficiency: −0.0037% points/μm, auxiliary power efficiency: −0.00129% points/μm, gross overall efficiency: −0.0039% points/μm and net overall efficiency: −0.0040% points/μm. The overall effect of scale build up is either increased power input of ∼68 kW/μm (at a constant power output) or decreased power output ∼25 kW/μm (at a constant power input). Successful contaminant control techniques are highlighted. Capacity reduction effects due to water side deposits are negligible.

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