Combined heat and power installations are comparatively rare on North Sea platforms. Space and weight constraints are severe: in addition fuel was initially cheap. Now a gas gathering network exists and fuel has a substantial value. Also, improvements in plant efficiency are desired in order to reduce pollutant emissions. Waste heat recovery installations are being introduced. This paper describes the problems associated with the non-ideal coupling of gas-turbines and waste heat exchangers that space and weight problems force one to employ and the techniques used to overcome them. An onshore installation consisting of a Frame 6 gas turbine (GT) and waste heat boiler (WHB) is presented comprising of units that are located very close to each other due to space limitations. The ductwork between the GT and WHB is modelled to 1/5th scale and velocity contours at various sections have been measured. An example of an offshore installation using the same turbine incorporating the lessons learned from the model is presented. The waste heat exchanger (WHE) in this case contains pressurised water as a heat transfer fluid and uniform gas flow into WHE is demanded in order to avoid hot spots and localised internal boiling.
The close-coupling of gas turbines and waste heat exchangers
Verbindung von Gasturbinen und Abgaswärmetauschern
1992
12 Seiten, 10 Bilder, 7 Quellen
Aufsatz (Konferenz)
Englisch
stationäre Gasturbine , Platzbedarf , Gewichtsverminderung , Modellversuch , Geschwindigkeitsprofil , Abgas , Brenngas , Anlagenplanung , Wasserdruck , Nordsee , Plattform (Meerestechnik) , Wärmetauscher , Schadstoffemission , Emissionsminderung , Gasströmung , Strömungsprofil , Maschinenanordnung , Abgaskessel
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