Dissertação
Coletor solar para pré-aquecimento do ar em sistemas de secagem estudo de caso - cura do tabaco
Fecha
2012-04-26Registro en:
SCHUCK, Martha Lisa Rodrigo. SOLAR COLLECTOR FOR AIR PRE-HEATING ON DRYING
SYSTEMS CASE STUDY - CURING TOBACCO. 2012. 106 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Santa Maria, Santa Maria, 2012.
Autor
Schuck, Martha Lisa Rodrigo
Institución
Resumen
In a country like Brazil, which has a high incidence of solar radiation, the use of solar
energy is an alternative that has been researched and used with many advantages.
This paper presents the design, construction and evaluation of the efficiency of a flat
solar collector for pre-heating the air, executed with low cost materials, to be used in
drying systems. The prototype of the solar collector with gravel bed was built to be
made a survey of data from temperature and relative humidity, using a recording
apparatus (data loggers), and carried out the calculations for determining the useful
heat provided by the collector. Since in the state of Rio Grande do Sul there are
approximately 85,560 farms growing tobacco, accounting to around 91,420 curing
barns, for which the widest energy source is firewood, as a case study was proposed
to use this solar collector to be used as a supplementary source of heat to the
existing curing barns. A case study was conducted on the curing process, verifying
the wood consumption needed for each phase of the process in order to determine
its energy demands. It was observed that the application of a 3sqm surface collector
represented a reduction of around 5.2% in firewood consumption, which
demonstrated the economic viability of the system with a time of payback of 3.4
years.