Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
STUDY OF THERMAL TRANSMITTANCE OF A BRAZILIAN CONCRETE HOLLOW BLOCK WALL
Submission Author:
Marcelo Adriano Fogiatto , PR
Co-Authors:
Marcelo Adriano Fogiatto, Gerson Henrique dos Santos, Viviana Mariani
Presenter: Gerson Henrique dos Santos
doi://10.26678/ABCM.ENCIT2018.CIT18-0242
Abstract
The increase in worldwide energy consumption is an issue that has to be dealt with through the next decades. One of the main concerns on this matter is the energy spent by electric apparatus in residential and commercial buildings. A considerable share of building energy consumption is due to the usage of heating, ventilation and air conditioning (HVAC) systems. This cause of energy consumption can be decreased by minimizing the heat transfer through the building envelope, i.e., reducing the thermal transmittance of the walls. In this work, the thermal transmittance of a typical Brazilian concrete hollow block wall is studied for a wide range of external environment temperatures. Firstly, thermal transmittance values are obtained for few external wall temperatures using computational fluid dynamics (CFD) commercial software. Afterwards, it is developed a program using the finite volume method (FVM), to calculate the transmittance for any temperature in the determined range. The results obtained from the CFD analysis and from the FVM written algorithm have reached good agreement, making it possible to perform thermal transmittance evaluation on the designed situation without the use of the CFD commercial software.
Keywords
Thermal Transmittance, Concrete Hollow Blocks, Computational Fluid Dynamics, Finite volume method
