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Háskóli Íslands > Verkfræði- og náttúruvísindasvið > Meistaraprófsritgerðir - Verkfræði- og náttúruvísindasvið >

Vinsamlegast notið þetta auðkenni þegar þið vitnið til verksins eða tengið í það: http://hdl.handle.net/1946/19858

Titill: 
  • Titill er á ensku Headloss in two phase flow of water and steam in geothermal gathering pipe systems
Námsstig: 
  • Meistara
Útdráttur: 
  • Útdráttur er á ensku

    The goal of this project is to measure pressure drop in gathering pipelines in a geothermal power plant and compare the measurements to predicted pressure drop according to known pressure drop models. The best suited model is found for the measurements. The effect of changing steam quality and roughness on the models is discussed.
    Most of the known models are emperical and only valid for the range they were made for.
    Orkuveita Reykjavíkur provided the physical data for the gathering pipes and Mannvit h.f. provided layout data. 6 gathering pipelines were measured at the upper region of Hellisheiði Power plant. Not all measurements nor the provided data were made at the same time which might not give the most accurate comparison of models with the measured data. \\
    The model with lowest combined average error and spread was Beattie model. Three others models predicted a lower average error but these models gave higher combined average error and spread.
    Since the known models were made in pipes that have much smaller diameter and less roughness a new model with diameter and roughness closer to the geothermal gathering pipes is preferred to be able to calculate the pressure drop accurately.

Samþykkt: 
  • 1.10.2014
URI: 
  • http://hdl.handle.net/1946/19858


Skrár
Skráarnafn Stærð AðgangurLýsingSkráartegund 
Lokaverkefni - Ingi Heimisson.pdf4.43 MBOpinnHeildartextiPDFSkoða/Opna