Simulation of a scaled down version of a run-around coil heat recovery system on COMSOL® Multiphysics.
Abstract: Due to changing anthropological activities, the consumption of resources is continuously increasing. As humans are spending more time indoors, the energy demand is also increasing. The building sector is a major consumer of energy. In buildings, space heating is important to maintain a comfortable space. For this, apart from increasing the thermal insulation and wellconstructed buildings, air-air heat recovery systems(among others) are being used to precondition the ambient air, so that the exhaust air from the conditioned space can pre-heat/ pre-cool the ambient air, depending on the season. In this thesis report, the run around coil heat recovery systems are discussed. A Multiphysics model on COMSOL® Multiphysics was created which was a scaled down version of an actual system. Real-life boundary conditions were provided as inputs to the model and its results were subsequently discussed. First, a literature review of the different air-air heat recovery systems was done, followed by discussing their various advantages and disadvantages. Next, an introduction to COMSOL® was made, followed by the construction of the model and the materials, mesh and physics conditions which were used along with the solver configuration. In the end the model showed success in pre-heating the ambient air in winter and pre-cooling it in summer seasons. Along with that other results were also discussed. In the end some options for future work on the project were also discussed.
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