Dissertação
Projeto e análise da eficiência de um sistema solar misto de aquecimento de água e de condicionamento térmico de edificações para Santa Maria - RS
Fecha
2012-03-07Registro en:
RUSSI, Madalena. Design and analysis of the efficiency of a mixed solar
water heating and thermal conditioning of buildings
for a Santa Maria - RS. 2012. 175 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Santa Maria, Santa Maria, 2012.
Autor
Russi, Madalena
Institución
Resumen
The use of solar energy in buildings, to improve the comfort environmental
conditions implies in the reduction of energy consumption. Since this is a clean,
renewable and abundant energy, the use of design strategies that use the sun's
energy makes the buildings more sustainable. This study aimed to develop a
combined system that captures solar energy on the roof of buildings, then using this
energy in two different purposes. A fraction of this power is used for heating water,
and the other portion is destined for building thermal conditioning in cold periods,
through a heating system that inflating the heated air. First of all, it was defined a preproject
of the combined system, considering the constraints of the project and
analyzed the appropriated materials and their thermal characteristics that would be
used in various parts of the system. Based on this pre-design and review of the
literature was possible to develop a mathematical model to evaluate the applicability
of the system in the climate it was proposed, which was performed considering the
July's climatic data. The results obtained shows that the heating subsystem could
elevate the temperature within the residence up to 7 ° C at most, and for about 30%
of hours to let the building's temperature achieved thermal comfort. In the water
heating Subsystem, in the month of July, the temperature increased by 5.5 ° C and in
the months of December, January, February and March the water temperature
exceeds 35 ° C, we can consider that the hot water demand in these months is met
without the use of electricity. Considering the month adopted as July, a month with
limited solar irradiance of the year, for study pourpose, this combined system showed
positive results, which will also improve for other months of the year.