- Project Runeberg -  Elteknik : Tidskrift för elektrisk kraftteknik, teleteknik och elektronik / Årgång 1. 1958 /
140

Table of Contents / Innehåll | << Previous | Next >>
  Project Runeberg | Catalog | Recent Changes | Donate | Comments? |   

Full resolution (JPEG) - On this page / på denna sida - 1958, H. 10 - Power Generation by Large Gas Turbine Units, by Lars E Lingstrand and Jan R Schnittger

scanned image

<< prev. page << föreg. sida <<     >> nästa sida >> next page >>


Below is the raw OCR text from the above scanned image. Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan. Ser du något fel? Korrekturläs sidan nu!

This page has never been proofread. / Denna sida har aldrig korrekturlästs.

Fig. 2. Vertical
cross-section at the gas
generator (a) and
power turbine (b)
of the Västervik
gas turbine plant.

ash corrosion presently limits the possible gas
temperature and the most general counter measure
appears to be cooling of the most exposed metal
surfaces.

Another problem in connection with the heavy
fuel oil is the preheating and cracking problem in
the fuel piping for a unit to be used as a standby
plant, ready for full load within eight to ten
minutes. The solution has been to retain temperature of
the fuel piping with electric heating and employ a
continuous circulation of the heavy fuel through the
piping. For fuel heating under standby periods serve
both an electric and an oil fired boiler, whereas an
exhaust boiler takes over under power production
periods. The main fuel supply tank is kept at 50° C
by means of a water-bed circulatory system, drawing
heat from the above mentioned sources.

The cooling water consumption of the described
40 MW plant is 0.83 m3/sec, which constitutes only
a third of the value for a corresponding steam power
plant. For places with a shortage of water it is
possible to arrange a cooling tower, which may be
necessary even for the cycle without intercooler,
which consumes only some 15 % of the mentioned
rate.

The operation of large gas turbine plants are
favorably automatized to some extent, since starting,

stopping and change over procedures from active
power production to synchronous condensor service
otherwise will be a little too complicated. The trend
now is to go very far with automation and for the
Västervik plant a remote control system will be
developed, which allows the unit to be operated
outside the station, reducing the necessary attention
to a minimum.

Capital Charges

The present experience gained from the
construction of the Västervik plant indicates that the total
cost of a 40 MW gas turbine power plant will amount
to 17.5 millions Swedish crowns, exclusive of the
harbor and the oil storing arrangements. The
specific cost of construction, figured on its rated
capacity, will amount to 440 crowns per kW. The
allocation of the costs is as follows:

The gas turbine unit 62 %

The station structure 17 %

Electrical and control equipment 9 %

Cooling water plant 6 %

Miscellaneous 6 %

An analysis was made to find out howT the specific
construction cost varies relative to the size of the
unit, the Västervik conditions being assumed. To

1 140 ELTEKN I K 1958

<< prev. page << föreg. sida <<     >> nästa sida >> next page >>


Project Runeberg, Sat Dec 9 22:19:19 2023 (aronsson) (download) << Previous Next >>
https://runeberg.org/elteknik/1958/0144.html

Valid HTML 4.0! All our files are DRM-free