Abstract
As power density of electrical appliances in a building sector grows up, its thermal effect also increases especially within a well-insulated building. In order to investigate the heat gain of these appliances, this paper proposes a dynamic thermal model of electrical appliances which is embedded in a building thermal analysis by using thermal network method. For this, thermal-electrical analogy and a static model and a dynamic model of electrical appliance coupled to a thermal network of a building are presented. As applications, a monitor and a computer are selected and their thermal models are adapted to a building model. Finally, their thermal influence is observed by experimental results and simulation one.
Highlights
A building has a complex thermal interaction with its interior and exterior conditions
We present how electrical appliances influence the building thermal behavior by representing thermal-electric analogy and show a dynamic model of electrical appliances which exhibit thermal properties and its effect on a building
There are no significant difference of simulated temperature obtained by a static model and a dynamic model of electrical appliances
Summary
A building has a complex thermal interaction with its interior and exterior conditions. Installation and utilization of sub-systems, structures and materials, and meteorological and geographical data lead different thermal characteristics and dynamic behaviors of a building Since these factors influence energy performance and building efficiency, it is necessary to analyze them in detail for more accurate thermal evaluation [1]. As one of the dynamic methods, thermal network has been used from mid-1980s for the reason of its simplicity and its accuracy to compose the heat source and the structure of the building at the same time [4,5,6,7] This method is based on the energy balance equation (first law) and the analogy between thermal and electrical systems.
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