Fabricação e estudo de um coletor solar não convencional: uma alternativa para aquecimento da água utilizada no Tratamento Hidrossanitário Térmico da Manga (THT)
In Brazilian northeast mango is grown in many states. Phytosanitary barriers are imposed on the fruit destined for the international market, being the immersion in tanks with water at 46.1ºC recommended in the solution of two typical problems: the anthracnose and the elimination of the fruit fly....
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| Format: | Dissertação |
| Sprog: | pt_BR |
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Brasil
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| Online adgang: | https://repositorio.ufrn.br/jspui/handle/123456789/27124 |
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| Summary: | In Brazilian northeast mango is grown in many states. Phytosanitary barriers are
imposed on the fruit destined for the international market, being the immersion in
tanks with water at 46.1ºC recommended in the solution of two typical problems:
the anthracnose and the elimination of the fruit fly. The temperature levels required
for the heat treatment of the mango and the excellent local climatic conditions point
to the technical feasibility of using solar heating in substitution of much of the LPG
(Liquified Petroleum Gas) consumed. For the feasibility study of the water heating
used in the thermal hydro sanitary treatment (THST) process of the mango, this
work has the objective of manufacturing a multitube solar collector, working in a
continuous flow regime, with an absorber serpentine formed by PVC tubes
connected in series, arranged in labyrinth shape over an aluminum absorber plate
and connected to a cold water supply. The system was tested for the diagnosis of
its thermal performanceand the necessary parameters for its characterization. For
a period from 9:00 a.m. to 4:00 p.m., the temperatures were collected periodically at
internal and external points of the collector; the inlet and outlet water temperatures
for different flows (60l/h,80 l/h, 100l/h) in steady state and global solar radiation over
the period of the tests. The overall loss coefficient and the thermal efficiency of the
collector were calculated. In order to estimate the thermal energy demand, the
expected conditions were simulated in the harvesting period and then the technical
characteristics for the insertion of the collectors in the heating system were
evaluated and later the technical and financial feasibility of the proposed solution
and final configuration more suitable for this solar heating installation. The
parameters presented by the prototype were satisfactory, they serve as basis for the
study of solar heating systems in the agribusiness sector and constitute a viable
alternative from a technical, constructive and financial point of view. |
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