The thesis goal is to analyze the Škoda Power Company, to assess the company acquisition by the Doosan Corporation at the end of the 2009 year and to suggest measures with potential to increase benefits from the acquisition both for Škoda Power Company and its owner. The Škoda Power company financial health and performance (earnings, profitability, debt ratio, liquidity), output and sales, research and development, identity of the firm, particularly the firm culture, communication and behavior and their changes as a result of Doosan Way philosophy implementation, staff, average earnings, labor productivity in the 2007 -- 2012 years are analyzed. Areas with the highest potential of synergy effects impacts are discovered using strategic analysis of the firm, synergy effects are discussed and improving measures are suggested if the synergy potential exceeds the real synergy effects.

The aim of the master’s thesis is a design of double casing condensing steam turbine with gearbox, reheat and with power output 110 MW for solar power station. The steam turbine has an axial output to the air cooled condenser. The design of the turbine is developed on the basis of concept of Doosan Skoda Power company. It is the main reason this turbine has the impulse blading. There are heat calculation and calculation of heat balance diagram in the first part of the thesis. The system of regeneration consist of three Low Pressure Feedwater Heaters (L.P. FWH), deaerator, and two High Pressure Feedwater Heaters (H.P. FWH). The next part of the thesis is focused on a flow path section of turbine. There is a selection of profile of turbine blades at this part, too. The basic design and strength calculation are available only for high-speed high pressure (HP) part of turbine, as an assignment of the thesis says. There is heat balance diagram for 75 % of nominal power output at the end of thesis. The drawing of longitudinal section of HP part of turbine is the main appendix of this thesis.

<p>This thesis work is made by Torbjörn Johansson on Karlstad University for Uddeholms AB. The assignment in this thesis work was to investigate tough cutting in three different tool steels: Vanadis 4 Extra, Vancron 40 and Sverker 21. The research was to compare the wear of the tool after cutting in each one of the tool steel alloys. The research was also made to see if the tool cutting in Vancron 40 has a better wear than the tool cutting in Vanadis 4 Extra and also compare the results with Sverker 21. All three of these alloys are a part of Uddeholms AB:s range of products, and is used in applications like forming tools and knife tools.</p><p> </p><p>Vancron 40 is a powder steel with a very good combination of mechanical properties like ductility, adhesive strength and hardness. But it is difficult to cut, mill and manufacture Vancron 40, and it also has a high material cost. If it can be showed that Vancron 40 has a better ability when it comes to cutting compared with Vanadis 4 Extra it would lead to a good sales point because more savings for the customers can be made regarding their tools.</p><p> </p><p>The research is made in a “Doosan VMD 600” 5-axis milling machine, the tools that have been used are from Sandvik Coromant and are a ball mill and a bull mill. Both mills have a diameter of 4 mm and they are both made of solid carbide.</p><p> </p><p>The result showed that Vancron 40 has a minor wear of tool compared to Vanadis 4 Extra and in most cases also Sverker 21.</p><p> </p><p>A cost example diagram was made where time against tooling-cost are presented. When the tool has cut (effective time) in about 950 hours the savings are about 800 000 SEK.</p><p> </p><p>Also a research about surface finish was made but the results were pretty confusing and no pattern was found. Therefore no conclusions were made regarding surface finish.</p>

This thesis work is made by Torbjörn Johansson on Karlstad University for Uddeholms AB. The assignment in this thesis work was to investigate tough cutting in three different tool steels: Vanadis 4 Extra, Vancron 40 and Sverker 21. The research was to compare the wear of the tool after cutting in each one of the tool steel alloys. The research was also made to see if the tool cutting in Vancron 40 has a better wear than the tool cutting in Vanadis 4 Extra and also compare the results with Sverker 21. All three of these alloys are a part of Uddeholms AB:s range of products, and is used in applications like forming tools and knife tools.   Vancron 40 is a powder steel with a very good combination of mechanical properties like ductility, adhesive strength and hardness. But it is difficult to cut, mill and manufacture Vancron 40, and it also has a high material cost. If it can be showed that Vancron 40 has a better ability when it comes to cutting compared with Vanadis 4 Extra it would lead to a good sales point because more savings for the customers can be made regarding their tools.   The research is made in a “Doosan VMD 600” 5-axis milling machine, the tools that have been used are from Sandvik Coromant and are a ball mill and a bull mill. Both mills have a diameter of 4 mm and they are both made of solid carbide.   The result showed that Vancron 40 has a minor wear of tool compared to Vanadis 4 Extra and in most cases also Sverker 21.   A cost example diagram was made where time against tooling-cost are presented. When the tool has cut (effective time) in about 950 hours the savings are about 800 000 SEK.   Also a research about surface finish was made but the results were pretty confusing and no pattern was found. Therefore no conclusions were made regarding surface finish.

The thesis is focused on designing of backpressure steam turbine to drive the crusher in the sugar factory having the power input of the 2 200 kW. Thermodynamic calculation of two conceptual variations is gradually implemented in the thesis with the aim to determine the steam mass flow through the turbine. In the first version the control stage is selected as an A-wheel and in the second version as a Curtis wheel. The stage part of both versions consists of series action stages. Furthermore, it contains basic design of the gland steam system and the nozzle control system. Both radial and thrust bearings are designed based on the acting forces. The thesis also includes strength calculation of the selected components. The final part deals with comparison and evaluation of the optimal solution. Due to the small difference in rotor weight (m =19,72 kg), and especially for the less steam consumption (M = 4,87 kg/s), the first version can be considered as an optimal solution. This thesis is amended by a mechanical drawing of the turbine cross section on a common frame with a gearbox.

This thesis is focused on calculation of double casing condensing steam turbine with capacity 200 MW for petrochemical industry´s consumptions. Engine is projected for gas-steam cycle. It has one controlled extraction points placed between two bodies, two uncontrolled extraction points and axial output to air-cooling condenser. Balance scheme was made for 100% operation. Detail design is made only for ST/NT casing and it includes calculation of flowing part, selection of blade´s profile and its stress control. Rotor is checked for critical speed, safety rigid coupling is calculated and according to reaction forces journal bearing are designed. In the end regulation of turbo-set is discussed more precisely and there are calculation of temperature and pressure in uncontrolled extraction points during 80% and 60% operation. Thesis was written out according to Doosan Skoda Power´s instruction and with their cooperation.

Projektet är utfört på uppdrag av Kraftringen AB för deras nybyggda värmekraftverk i Örtofta med anledning av att den befintliga dokumentationen över de olika systemen saknar en tydlig steg-för-steg process med avseende på drift, start och stopp av anläggningen. Fokuset för denna uppsats är avgränsad till uppstart genom HMI för ångturbin. Genom observationer på plats i värmekraftverket samt tagit del av driftpersonalens egna instruktioner, har en checklista och flödesschema tagits fram av uppsatstagarna. Resultatet har fått en högre tillförlitlighet tack vare att uppsatstagarna även har haft tillgång till dokumentation från leverantörer i form av papper och digitala kopior i Kraftringens interna nätverk. Detta projekt har lett fram till en tydlig och enhetlig steg-för-steg process som kommer att underlätta driftpersonalens arbete på Örtoftaverket och skapa en ytterligare effektivitet vid uppstart av ångturbin.

This diploma thesis focuses on designing impulse stage steam turbine to be used as the feed pump drive. I consecutively carried out thermodynamic calculation, seals and bearings layouts, with the aim to determine the steam mass flow through the turbine. Furthermore, I conducted turbine blade toughness check-ups, determined the rotor critical rotational speed, check-up rotor critical place (bearing pin) for torsion, and created a clutch screws design. The final part of this thesis pursues the other operating states of the turbine. This thesis is amended by a mechanical drawing of the turbine transection.

This thesis describes the design of a condensing steam turbine with reheating for fossil power plant. The turbine is a double parts. The first casing is formed by a simple HP casing. The second casing is combined MP-LP casing with axial outlet of steam into the water-cooled condenser. Feedwater regeneration system consists of two high-pressure heaters, the four low-pressure heaters and feed tank. In thesis is includes the calculation of heat balance and the draft of flow channel of HP and MP-LP casing. Next is a detailed calculation of MP-LP casing with includes calculation of flowing part, selection of blade´s profiles and its stress control. Rotor MP-LP casing is checked for torsion and computed size of the critical speed. Clutch is ispected by security check and draft radial bearings. Stress control casing is carried out according to the theory of thick shells. Work includes flow scheme for 100% and 75% performance. In the end is comparing the efficiency of the individual casing of the turbine with the work 3b together with the specific heat consumption. Work includes a longitudinal section of the MP-LP casing. This thesis has been developed in cooperation Škoda Power, Doosan.

This thesis deals with design is condensing steam turbines burning fossil fuels with nominal capacity of the generator of 250 MW with steam reheating and regenerative eight uncontrolled extraction points. The turbine consists of two bodies: a combined high-intermediate pressure section and low pressure parts with dual way outlet down into the water-cooled condenser. Work includes calculating thermal scheme for 100% and 75% capacity, specific heat consumption calculation and design of the flow HP-MP body. Further strength control and basic engineering design of high-medium- work completed by longitudinal section. Achievements are at the end of work compared with work 3a and the conclusion summarizes the advantages and disadvantages of the concept.