På Nouryons anläggning i Stockvik, Sundsvall sker idag produktion inom specialkemi distribuerat över tre fabriker som tillverkar olika produkter. Då produktionen sker genom avancerade processer och under utmanande förutsättningar ställs höga krav på produktionens utrustning. För att kunna leverera så hög andel tillgänglig tid som möjligt krävs välutvecklade system och metoder för hur utrustningen ska underhållas. På Nouryon ansvarar den centrala underhållsorganisationen för underhållet av de tre fabrikerna. Det stora ansvarområdet och komplexa förutsättningar gör området intressant att undersöka. Därför har detta arbete syftat till att identifiera förbättringsområden inom underhållsfunktionen genom först en mognadsmodell som följts av en revision. Båda dessa har utgått från begreppet driftsäkerhet som kan beskrivas som en utrustnings förmåga att leverera önskad funktion. Mognadsmodellen har gjorts i syfte att identifiera mognadsgraden i organisationen och jämföra den mot Nouryons egna mognadsbedömning. Revisionen har avgränsats till att utvärdera underhållsfunktionen inom de tre områdena; tillgångar och information, organisation och arbetsprocess. Mognadsmodellen visade att Nouryon inom många områden har en mogen underhållsorganisation, vilket i stort sett stämmer överens med deras egna bedömning. Genom revisionen kunde ett antal förbättringsområden identifieras som till stor del sammanföll med resultatet från mognadsmodellen. De största förbättringsområdena som identifierades var: • Uppdatera och prioritera rutiner för konditionsbaserat underhåll• Öka användningen av KPIer som kopplar samman underhåll och produktion, till exempel MTBF, MTTR etc.• Definiera kompetenskrav för utförande av arbeten• Utveckla planer för hur kompetenser ska utvecklas• Arbeta mer aktivt med feedback och informationsförmedling i arbetsprocesser En av de slutsatser som kunde dras från revisionen var att flera av de uppmärksammade förbättringsområdena kunde härledas till organisationens förmåga att införa nya rutiner. Därför utvecklades ett verktyg som kan användas som stöd i förändringsprocesser när nya rutiner ska införas. Detta genom att samla all relaterad information kring ett införande på ett och samma ställe samt bidra till att planering, återkoppling och repetition faktiskt utförs och inte faller i glömska. Verktyget syftar till att fungera som en samlingsplats för alla som är involverade i en ny rutin genom att från start tydliggöra mål och syfte med rutinen och samtidigt definiera ansvarsområden och kommunikationskanaler. / The Nouryon facility located in Stockvik, Sundsvall produces specialty chemicals distributed over three factories with different production. All production are dependent on advanced processes and the challenging conditions puts rigorous requirements on the equipment. To be able to deliver the highest amount of available time, well-established systems and methods regarding the maintenance of the equipment are required. At Nouryon a central maintenance organization operates, which is responsible for the over-all maintenance of the three factories. This substantial field and its complex conditions opens up for an interesting area of research. Therefore, the aim of this report is to identify areas of improvement within the maintenance function by constructing a maturity-model followed up by an audit. Both methods have been based on the concept of operational reliability, which can be described as the ability of an equipment to deliver the required function. The maturity model has been conducted in order to identify the degree of maturity in the organization and compare it against Nouryon’s own maturity assessment. The audit has been limited to evaluating the maintenance function within the three areas: Assets and Information, Organization and Work Process. The maturity model has shown that Nouryon has a mature maintenance organization in many areas, which generally matches their own evaluation. Through the audit, several areas of improvement could be identified that largely coincided with the results from the maturity model. The main areas of improvement identified were: • Prioritize and update routines for condition based maintenance• Increase the use of KPI’s that links maintenance work with production for example, MTBF and MTTR etc.• Define what skills are required to perform specific work tasks• Develop plans for how competencies are to be developed• Work with inclusion and involvement in work processes through feedback and clearer information One of the conclusions that could be drawn from the audit was that several of the areas of improvement identified could be linked to the organization’s ability to introduce new routines. Therefore, a tool was developed that can be used as a support in the changing process when new routines are to be introduced. This by establishing routines for planning, feedback and repetition as well as clearly define stakeholders and responsibilities. By gathering all information related to a change in one place the routine becomes more available, which in turn increases the chances of having a successful and long-term change.

This thesis aims to analyze how different temperature deviations affect the components of wind turbines. A study of the temperatures in several different components was carried out to get a clearer picture of how these affects operational reliability. By trying to link, for example, extreme values of temperatures to possible alarms and downtime in the wind power plants, the hope is that this study will be able to contribute to safer and more maintenance-free wind turbines in the future. The 12 wind turbines that have been evaluated in this study are localized in southern Sweden. The time period for the collected data extends over 6 years. In the thesis, an analysis has been carried out with the help of the computer program Matlab to examine different types of data collected from the components in the wind turbines. The data was plotted with the help of various functions in Matlab and with the help of mathematical equations. The data was then observed ocularly by the authors, which led to the discovery of different connections between temperature variations in the components and different error codes. The generator bearing was the component that was found to have the highest correlation between temperature deviations and specific error codes related to various yaw-errors, which can be explained as error codes that occur when the wind turbine fails to adjust itself to the wind. An analysis has also been made to determine whether there was a temperature-related upward trend in any of the components in the wind turbines. This was carried out with the help of various standard deviation calculations and calculation of the mean temperature value of different components. The standard deviation in this case describes how much the temperature of each component varies from the mean value. It turned out that there was such an upward trend for the Generator Bearing and Generator Phase 3 components. Some turbines also turned out to have a more distinct upward trend than others

Detta examensarbete har genomförts på AstraZenecas produktionsanläggning i Gärtuna, Södertälje och behandlar ett av AstraZenecas dyraste media, tryckluft. Mer specifikt behandlar rapporten tryckluftsanläggningen i byggnad 921 (B921) där optimal drift på kompressorerna inte har lyckats uppnås på grund av att kapaciteten på kompressorerna inte matchar flödesbehovet i byggnaden, som i sin tur har skapat onödiga kostnader och utgifter. Det centrala tryckluftssystemet som finns i Gärtuna har på vissa delar en underkapacitet och är hårt belastat. Detta beror på att Astra Zeneca också har underkapacitet på elnätet i Gärtuna som minskar möjligheterna till att sätta in större kompressorer på området. Genom att sammankoppla dessa system kan det centrala systemet avlastas samtidigt som kompressorerna i B921 får arbeta som de är tillverkad för att göra. Målet med arbetet har varit att hitta lösningar för att uppnå en bättre drift på kompressorerna i B921 samtidigt som redundansen i byggnaden och hela produktionsområdet i stort ökar genom att bygga ihop tryckluftssystemet i B921 med det centrala tryckluftssystem som finns på Gärtuna och betjänar övriga delar av anläggningen. Samtidigt som det centrala värmeåtervinningssystemet ansluts till B921 för att optimera energiförbrukningen genom att ta tillvara på den värme som uppstår vid komprimering av luft. Efter genomfört arbete framkom att bästa lösningsalternativet för att åtgärda den ojämna och osäkra driften på kompressorerna är att koppla samman tryckluftssystemet i B921 med det centrala tryckluftssystemet som betjänar övriga delar av Gärtuna. Genom att göra detta kommer kompressorerna kunna arbeta kontinuerligt på ett effektivt flöde. Samtidigt kommer B921 att kunna förse det centrala systemet med luft, något som ökar tillgängligheten för hela Gärtuna. Dock kommer ingen luft att kunna erhållas från det centrala systemet då B921 arbetar på ett högre tryck. Vidare så kommer värmeåtervinningen att öka när det centrala värmeåtervinningssystemet ansluts till kompressorernas kylning. Något som även kommer minska utsläppen av koldioxid då behovet av fjärrvärme kommer minska. / This thesis work has been done together with AstraZeneca at their manufacturing site in Gärtuna, Södertälje. The work treats the compressed air system which is their most expensive media. This report will be about the compressed air system in building 921 (B921) where the operation is not optimal due to low flow requirements which do not meet the specifications of the compressor. This has created unnecessary costs and losses in energy.The central compressed air system at Gärtuna that supplies most of the production has under capacity. While there is under capacity in the electricity network at Gärtuna which limits the possibility to use bigger compressors. By connecting these systems the central system will be relieved and the compressors in B921 will get the workload they are designed for. The goal with this thesis have been to achieve a better operation for the compressors in B921 as well as achieve higher redundancy in both B921 and gärtuna by connecting the compressed air systems. At the sametime the heat recovery system will be connected to B921 to optimize the recovery by recovering the heat in the compressor. After completing the work, it emerged that the best alternative to fix the workload on the compressors is to connect the compressed air system in B921 with Gärtuna. By doing this the compressors workload will be the same as they are designed for. This will increase the availability for Gärtuna. B921 will not be able to receive air from the centralsystem, due to a higher pressure in B921. The heat recovery will be increased when the heat recovery system will be connected to the compressors. Which will decrease the emissions of carbondioxide due to less need of district heating.

Thesis (D. Tech. (Electrical Engineering, Dept. of Process Control and Computer Systems))--Vaal University of Technology. / In recent years, industrial plant maintenance has changed dramatically. These changes are due to a considerable increase in the number and variety of physical plant assets, increased design complexity, new maintenance techniques and changing perspectives regarding on how to perform maintenance effectively. Managers at modern process plants are becoming increasingly aware of the extent to which equipment failure affects safety and the environment. Process plant personnel are limited in their ability to accurately and consistently evaluate the health of plant assets. Due to poor record keeping, maintenance staff often has little defence against aging equipment and asset failures. As a result companies have undertaken to implement planned equipment maintenance schedules and install new technology to allow for efficient tracking and analysing of equipment health across the board. The introduction of an integrated asset management solution is presented in this thesis. The integrated asset management solution will assist maintenance staff to cost-effectively predict the probability of asset failure prior to the occurrence of any actual plant incidents. The integrated solution documented in this thesis will be implemented at the Sasol Solvents site to enhance plant availability, maximum up time for all plant assets and plant safety. Strategic Asset Management Inc. (SAMI) uses the Operational Reliability Maturity Continuum model to improve profitability, efficiency and equipment reliability. The SAMI empirical model employs various stages to address improved performance and asset management and was used as a guideline to develop an integrated solution to optimise plant performance and profits. The integrated asset management solution, documented in this thesis, was developed with the intended function of bringing information from diverse plant based systems and field equipment to the maintenance personnel in an understandable interface so that the information can be used to improve the reliability and availability of all plant assets.

The diploma thesis is focused on the determination of the life cycle state of the production machine. The thesis is divided into several chapters. First, the life cycle of the machine is defined, and the phrase used here is given. Subsequently, the work is devoted to maintenance, repairs and modernization of the production machine. Then there is a demonstration of Schaeffler Skalica's corporate structure and individual methods that determine the state of the machine's life cycle. In the next chapter, the machine is described and then the analysis is made for the current state of the machine. Then the analyses created are evaluated.