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dc.contributor.authorVenter, P.V.Z.
dc.contributor.authorVan Eldik, M.
dc.identifier.citationVenter, P.V.Z. & Van Eldik, M. 2018. Simulation of a predominantly passive natural air cooling system. International Conference on the Domestic Use of Energy (DUE), 3-5 April, Cape Town, South Africa. []en_US
dc.identifier.isbn978-0-9946-7594-1 (Online)
dc.description.abstractClimate control is an everyday challenge. With the rapid surge in electricity prices over the past few years, air conditioning operating expenses necessarily increased. The effects, furthermore, of global warming result in increased cooling, and therefore, energy demand. The purpose of this paper is to propose two models that simulate a natural air cooling system. The first model simulates cooling through an earth to air heat exchanger, utilising the soil as a heat sink. The second model simulates the transient cooling of a control volume, which receives cooled air and is open to the environment. A scale model of an earth-to-air heat exchanger system was designed, constructed and used to verify results from the proposed models. Following verification, a real-life size heat exchanger was simulated in order to cool down a room of 60 m3within one hour, using only the underground soil as a heat sink. Results showed that a room at an initial 30 °C can be cooled down to 20.5 °C with a 1.2 m underground heat exchanger and down to 17.8 °C if the length is increased to 2.0 m. Only fan power is needed to increase the air's dynamic pressure, resulting in flow conditions. As a result a coefficient of performance between 60 and 80 can be achieveden_US
dc.subjectAir coolingen_US
dc.subjectControl volumeen_US
dc.subjectEarth to air heat exchangeren_US
dc.subjectSimulation modelsen_US
dc.subjectTransient coolingen_US
dc.titleSimulation of a predominantly passive natural air cooling systemen_US
dc.contributor.researchID10681949 - Van Eldik, Martin
dc.contributor.researchID12330825 - Venter, Philip Van Zyl

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