Calculation analysis of energy saving tools for fan and pump applications

This thesis analyses the calculation of FanSave and PumpSave energy saving tools calculation. With these programs energy consumption of variable speed drive control for fans and pumps can be compared to other control methods. With FanSave centrifugal and axial fans can be examined and PumpSave deals with centrifugal pumps. By means of these programs also suitable frequency converter can be chosen from the ABB collection. Programs need as initial values information about the appliances like amount of flow and efficiencies. Operation time is important factor when calculating the annual energy consumption and information about it are the length and profile. Basic theory related to fans and pumps is introduced without more precise instructions for dimensioning. FanSave and PumpSave contain various methods for flow control. These control methods are introduced in the thesis based on their operational principles and suitability. Also squirrel cage motor and frequency converter are introduced because of their close involvement to fans and pumps. Second part of the thesis contains comparison between results of FanSave’s and PumpSave’s calculation and performance curve based calculation. Also laboratory tests were made with centrifugal and axial fan and also with centrifugal pump. With the results from this thesis the calculation of these programs can be adjusted to be more accurate and also some new features can be added.

Variable speed drive in fan system monitoring

Fan systems are responsible for approximately 10% of the electricity consumption in industrial and municipal sectors, and it has been found that there is energy-saving potential in these systems. To this end, variable speed drives (VSDs) are used to enhance the efficiency of fan systems. Usually, fan system operation is optimized based on measurements of the system, but there are seldom readily installed meters in the system that can be used for the purpose. Thus, sensorless methods are needed for the optimization of fan system operation. In this thesis, methods for the fan operating point estimation with a variable speed drive are studied and discussed. These methods can be used for the energy efficient control of the fan system without additional measurements. The operation of these methods is validated by laboratory measurements and data from an industrial fan system. In addition to their energy consumption, condition monitoring of fan systems is a key issue as fans are an integral part of various production processes. Fan system condition monitoring is usually carried out with vibration measurements, which again increase the system complexity. However, variable speed drives can already be used for pumping system condition monitoring. Therefore, it would add to the usability of a variablespeed- driven fan system if the variable speed drive could be used as a condition monitoring device. In this thesis, sensorless detection methods for three lifetime-reducing phenomena are suggested: these are detection of the fan contamination build-up, the correct rotational direction, and the fan surge. The methods use the variable speed drive monitoring and control options for the detection along with simple signal processing methods, such as power spectrum density estimates. The methods have been validated by laboratory measurements. The key finding of this doctoral thesis is that a variable speed drive can be used on its own as a monitoring and control device for the fan system energy efficiency, and it can also be used in the detection of certain lifetime-reducing phenomena.

”What an awesome time to be a fan!” ‒ Kokemuksellisuuden muodostuminen Batman: Yön Ritari -elokuvan markkinointiin kehitetyssä ARG-pelissä

Tutkimukseni käsittelee kokemuksellisuuden muodostumista Batman: Yön Ritari -elokuvan markkinointiin kehitetyssä ARG-pelissä. ARG-peli eli vaihtoehtotodellisuuspeli on pervasiivinen peli, joka välittyy osallistujille reaaliaikaisesti erilaisten arkipäiväisten viestimien kautta immersiivisyyttä ja yhteisöllisyyttä korostaen. Vuorovaikutukseen perustuva ARG-peli on kokemus, joka muodostuu yhteistyössä pelintekijöiden ja osallistujien välillä. Tutkimuksen keskeisenä tavoitteena on tarkastella Why So Serious? -pelin kokemuksellisuutta luovia elementtejä sekä pelintekijöiden että pelaajien näkökulmasta. Tutkimusaineistoni koostuu verkkoaineistosta. Käsittelen tutkimuksessani kahta peliyhteisön kannalta merkittävää keskustelufoorumia, joissa osallistujat kokivat ja pelasivat peliä yhteisönä ja yksilöinä. Tutkimusmetodini pohjautuu fenomenologis-hermeneuttiseen metodiin: tarkastelen ARG-pelin kokemuksellisuutta tulkitsemalla osallistujien kirjallisia ilmaisuja ilmiöön liittyvä teoriatausta tukenani. Tutkimukseni on aineistolähtöinen ja etenee kronologisesti. Pelin kokonaiskuvan muodostamisessa olen hyödyntänyt osallistujien luomaa wikisivustoa, mikä toimi pelin aikana sekä informaatiokanavana että peliä dokumentoivana mediana. Vaikka käsittelemäni ARG-peli ei edustanut perinteistä ARG-peliä muun muassa heikon tarinallisuutensa vuoksi, se muodosti osallistujilleen hyvin voimakkaan kokemuksen. Why So Serious? -pelin kokemuksellisuus pohjautui hyvin pitkälti Batman-brändin tunnettuuteen ja populaarikulttuuriseen arvoon sekä nimekkäisiin fiktiivisiin hahmoihin, jotka yhdessä houkuttelivat osallistujia uppoutumaan pelin vaihtoehtotodellisuuteen. Keskinäisestä kilpailustaan huolimatta peliyhteisöt muodostivat jäsenilleen kollektiivisen identiteetin tunteen, minkä lisäksi muun muassa pelin dokumentointi ja spekulointi laajensivat osallistujien kokemusta. Yksilötasolla ensikertalaisuus vaikutti vahvasti pelin muodostamaan kokemukseen: kokemus oli voimakkaampi niille pelaajille, jotka osallistuivat ARG-peliin ensimmäistä kertaa. Why So Serious? -pelistä tuli ainutkertaisuudessaan osa Batman-brändin historiaa, mikä vahvisti pelin osallistujilleen tuottamaa kokemusta. 2000-luvun kuluttaja etsii elämyksiä ja myös markkinoinnin on mukauduttava – sekä uudistuttava – kuluttajien kasvavien vaatimuksien mukaan. Tutkimukseni on yksi esimerkki onnistuneesta, 2000-luvun kuluttajille suunnatusta markkinointikampanjasta.

Grassroots Charity in China: Case Analysis of a Charity Project Organised by Jane Zhang Fan Club

As unregistered grassroots charities do not appear in official statistics in China, they tend to remain unnoticed by scholars. Also as they operate unofficially and avoid publicity, their work is usually not reported by the media. In this research I explore the grassroots charity activity of one pop music fan club from the viewpoint of trust as a sociological concept. I will also establish the general situation on charity in China. By using textual analysis on internet blogs and discussion forums I map the charity project from the discussion of the original idea to the execution and follow up phase. I study the roles the fan club members assume during the project as anonymous participants of internet conversations, as well as concrete active charity volunteers outside of the virtual world. I establish parties, other than the fan club, which are involved in the charity project. Interviews with one of the participant of the project in 2010, 2014 and 2015 bring valuable additional information and help in distributing the questionnaire survey. A quantitative questionnaire survey was distributed among the fan club members to get more detailed information on the motives and attitudes towards official and unofficial charity in China. Because of the inequality in China, the rural minority areas do not have similar educational opportunities as the mostly majority inhabited urban areas, even though the country officially has a nine year compulsory education. Grassroots charities can operate in relative freedom taking some of the government’s burden of social responsibilities if they are not criticizing the authorities. The problem with grassroots charity seems to be lack of sustainability. The lack of trust for authorities and official charities was the reason why the Jane Zhang fan club decided to conduct a charity case unofficially. As a group of people previously unknown to each other, they managed to build mutual trust to carry out the project transparently and successfully, though not sustainably. The internet has provided a new and effective platform for unofficial grassroots charities, who choose not to co-operate with official organisations. On grassroots level charities can have the transparency and trust that lack from official charities. I suggest, that interviewing the real persons behind the internet aliases and finding out what happened outside the discussion forums, would bring a more detailed and outspoken description of the project concerning of the contacts with the local authorities. Also travelling to the site and communicating with the local people in the village would establish how they have experienced the project.