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  • 1. Larsson, Mattias
    CFD Study of a Heat Recovery Unit2012Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In today’s hunt for greener energy and more efficient devices and solutions a large focus for the ventilation industry is to lower energy consumption. One resolution in doing this is to optimize existent air handling units to try to minimize the internal pressure drop inside units.This thesis work covers the creation and subsequent simulating of a heat recovery unit, to obtain a better geometry that minimizes pressure drops.After the development of a reference model, tested and compared to measurements on the actual unit, optimization work begun trying out a number of different designs, primarily to obtain a simple and cheap solution, with the possibility to modify existing units, and secondarily been given freer hands to achieve as good results as possible.A very simple solution is shown to decrease internal pressure drops by up to 33% with the more advanced and costly designs cut pressure drops by 56%.Even the simpler approach shows a huge consequence in energy savings, computed over all units sold, energy consumption can be decreased by an amount comparable to 50 houses per year. There are however more sources to internal pressure drops that this study doesn’t cover and will need additional analyses.

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