Sigríður Bára Ingadóttir flytur fyrirlestur um verkefni sitt til meistaraprófs í vélaverkfræði. Verkefnið ber heitið Analysis of heat transfer in air cooled condensers.
Ágrip
Condensing units at geothermal power plants containing surface condensers and cooling towers utilize great amounts of water. The vapor plumes emitted can also be visually impairing to a beautiful landscape. Air cooled condensers (ACCs) are not typically paired with dry or flash steam geothermal power plants, but can be a viable solution to eliminate the extensive water usage and vapor emissions related to water cooled systems. The present thesis investigates two different models that provide tools for calculating the heat transfer coefficient across air cooled tube bundles. An analytical model is created using MATLAB (2013), while ANSYS Fluent (2013a) is used to generate a numerical model. A correlation from literature is used for the heat transfer coefficient calculation in the analytical model and the k − ω shear stress transport (SST) turbulence model is used in ANSYS Fluent (2013a). The two models are then compared to evaluate which method better suits the ACC calculation.
Leiðbeinendur: Halldór Pálsson, dósent við Iðnaðarverkfræði-, vélaverkfræði- og tölvunarfræðideild Háskóla Íslands, Óttar Kjartansson, Green Energy Group AS og Gestur Bárðarson, Green Energy Group AS.
Prófdómari: Ármann Gylfason, dósent við Tækni og Verkfræðideild Háskólans í Reykjavík