search query: @keyword efficiency / total: 63
reference: 27 / 63
« previous | next »
Author:Ikäheimonen, Eero
Title:Optimizing reheat concepts for biomass power generation
Välitulistusprosessin optimointi biovoiman tuotannossa
Publication type:Master's thesis
Publication year:2010
Pages:101 s. + liitt.      Language:   eng
Department/School:Energiatekniikan laitos
Main subject:Energiatalous ja voimalaitostekniikka   (Ene-59)
Supervisor:Ahtila, Pekka
Instructor:Hulkkonen, Seppo
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

Logging on to the customer computers

  • Aalto University staff members log on to the customer computer using the Aalto username and password.
  • Other customers log on using a shared username and password.

Opening a thesis

  • On the desktop of the customer computers, you will find an icon titled:

    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

Reading the thesis

  • You can either print the thesis or read it on the customer computer screen.
  • You cannot save the thesis file on a flash drive or email it.
  • You cannot copy text or images from the file.
  • You cannot edit the file.

Printing the thesis

  • You can print the thesis for your personal study or research use.
  • Aalto University students and staff members may print black-and-white prints on the PrintingPoint devices when using the computer with personal Aalto username and password. Color printing is possible using the printer u90203-psc3, which is located near the customer service. Color printing is subject to a charge to Aalto University students and staff members.
  • Other customers can use the printer u90203-psc3. All printing is subject to a charge to non-University members.
Location:P1 Ark Aalto  4562   | Archive
Keywords:biomass power
reheat
efficiency
optimization
boiler
turbine
biovoima
välitulistus
hyötysuhde
optimointi
kattila
turbiini
Abstract (eng): This Master's thesis studies steam reheats with biomass power plants.
The primary research objective is to support the development of a reheat biomass power boiler concept.
The topic is approached with a broad perspective ranging from theoretical thermodynamic analysis to practical detailed boiler design.

Combining biomass power generation and reheat is a relatively new field of study.
Only a small number of reference bio power plants with reheat exist, and the scientific literature provides little related information on the subject.
The work consists of two parts.
The first part is a theoretical literature review.
The second part focuses mainly on cycle efficiency and economic evaluations by studying a case: Condensing Power Plant with an electrical output of 35 MWe.

The reheat cycle thermodynamics have been profoundly studied and the impact of incorporating reheat to cycle efficiency is analyzed.
Reheat biomass turbines are examined to assess their suitability for this case.
Existing reference plant characteristics have been reviewed.
Various cycle concepts are developed and their efficiency is optimized with Solvo software.
By incorporating reheat, the electrical efficiency can be improved by 1.8 to 2.5 percentage points.
The efficiency data is used for profitability calculations to perform economic evaluations for reheat investments.
With the current price levels, a payback period of 5 to 9 years is estimated.
The reheat biomass boiler is studied in detail.

Although some additional research is still recommended, the outcome of this study is the essential background information produced on the subject, which can be used to develop a reheat biomass power boiler product concept.
Abstract (fin): Tämä diplomityö käsittelee höyryn välitulistusta biovoimalaitoksissa.
Päätutkimuskohteena on tukea biovoimakattilakonseptin luomista, jossa on välitulistus.
Aihetta lähestytään monesta näkökulmasta aina teoreettisesta termodynaamisesta analyysistä käytännön yksityiskohtaiseen kattilasuunnitteluun.

Biovoiman tuotannon ja välitulistuksen yhdistäminen on suhteellisen uusi tutkimusala.
Vain pieni määrä referenssi biovoimalaitoksia on olemassa, joissa on välitulistus.
Tieteellinen kirjallisuus ei myöskään käsittele näitä kahta aihetta yhdistettynä.
Työ koostuu kahdesta osasta.
Ensimmäisessä osassa tehdään teoreettinen kirjallisuusselvitys.
Toinen osa keskittyy pääasiassa laitoksen prosessihyötysuhteen ja talouden tarkasteluun tutkimalla 35 MWe:n mallinnettua esimerkkilaitosta.

Välitulistusprosessin termodynamiikka on syvällisesti tutkittu, ja sen vaikutusta prosessihyötysuhteeseen on analysoitu.
Välitulistusturbiinien soveltuvuutta on myös arvioitu biovoimalaitoskäytössä.
Olemassa olevien referenssilaitosten ominaisuuksia on tutkittu ja vertailtu.
Erilaisia prosessikonsepteja on luotu ja niiden hyötysuhteita on optimoitu Solvo-ohjelmistolla.
Välitulistuksen lisääminen voi nostaa hyötysuhdetta 1,8 - 2,5 prosenttiyksikköä.
Hyötysuhteiden avulla lasketaan kannattavuus välitulistusinvestoinnille, jonka takaisinmaksuksi arvioidaan tämän hetkisellä hintatasolla 5 - 9 vuotta.
Välitulistus biovoimakattilaa tarkastellaan yksityiskohtaisesti.
ED:2010-03-18
INSSI record number: 39316
+ add basket
« previous | next »
INSSI