-· .. URUN TAN/TiMi PRODUCT PROMOTION 100 MW Diesel Combined Cycle Power Plant Anders Ahngeı· General Maııager,Applicatioıı Techııology Diesel Pol/'er Plmıts, \Vii rtsilii Diesel Oy The sizes of ebe diesel power plancs delivered by Wlirtsila Diesel now range ali the way up to 100 MW and above. These plants are most often operated by u rilities or bycompanies in or esrabilished for IPP projects (indepentent power producers). The demands on power plants of these kinds include high efficiencies, both electrical and total, and high availabilitles for maximum generation of eleccricity during ebe years of operacion. For this purpose, Wlirtsilii Diesel made a concepmal design for a 100 MW diesel power plant based on combined eyde technologies. Twodifferent ambient conditions were chosen, Scandinavian and Tropical. Two fuel qualities were also chosen: heavy fuel oil and nattıral gas. These criteria have an impocrant impact on powec plant pecformance, especially plant effıciency. Plant and Layout The 100 MW plant concept is based on 6 W/irtsiHi Yasa 18V46 engines wich a steam rnrbine. The rated diesel generator set output according to ISO reference (ambient25°C)conditionsis 15.SMWe at alternaror cerminals. The output of ehe sceam rurbine is 8 to 11 MWe, depending on wbether ehe applicacion runs on heavy fuel or nattıral gas. As seen from figure 1, ehe plant is divided into two t hree-by-tlıree separate engine rooms with a. middle section including ali the major common equipment for ebe plant. This middle section includes ali ebe eleccircal systems, HV as well as LV, ehe cencra.l coooling system and water treatment. it also includes ehe concrol room for ehe plant. The middle seccion layout reduces distances in ehe power plant and therefore has considerable impact on piping, cableing and operation in general. The basic layout can also be used for a 50 MW plant by leaving three engines Ollt. Carefol consideration has been given F ig. 1 'fhe layoııı ofa 100 M \\1/ dimi combiııed qde power plrıııı redıım to noise aspects, and distaıım in thc plant. (Thc wide trııck roıttcs marked with reci. ) ehe plant meets very stringent require- service on ehe auxiliary units. Forklift mencs in this respect. The diesel engines trucks move equipment and parcs from are enclosed in separate engine rooms. the workshop to differenc plant locaThe framework for ehe whole building is tions. The truck routes are wide enough based on steel strucrures and ehe walls for this purpose and are shown in tbe are ofdifferent panel-type materials de- layout. pending on ehe requirements. The wall Care was also raken in ehe location of materials in ehe engine rooms, especially piping and auxiliary units. The layout for ehe outside walls, are selected for especially close to ebe engine was degood engine-noise absorbing character- signed to enable use of prefabricated istics. The walls for eberestofehe building functional modules wbere this cechnique are made of lighter panel-type wall ma- has an advanrage. terials. The concept is based on two different In plancs based on this engine size, spe- fuel versions, heavy fuel oil and narural cial attention has co bepaid tothe material gas. In both cases ehe base engine has ehe logistics, such as spare pare bandiling same rigid design and also offers the and flow, and maintenance in general. Some of the engine spares weigh more than 1 ton, which hampers transport of these parts witlıin ehe plant. For meeting these handling and lifting requirements ehepowerplant is equipped witb ony small loca! cranes, separate cranes in each engine room, and cranes at key places to meet lifring needs during DOGAL GAZ DERGiSi SAYI. 33 125 same performance whether it runs on gas or beavy fuel oil. Of course before ehe engine most differences are on ehe fuel handling side. Improvements in fuel oil handling and treacment m,ıke it possible to run ehe engine on various heavy fuel oils. The real heavy fuel oil engine must be capable ofsrarting, running on any load, as
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