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A large-panel unglazed roof-integrated liquid solar collector - energy and economic evaluation
Medved, Sašo (Avtor), Arkar, Ciril (Avtor), Černe, Boštjan (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://www.sciencedirect.com/science/journal/0038092X Povezava se odpre v novem oknu

Izvleček
Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency ofa large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a tourist facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collectorćs efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters the fin length the absorber material and thickness the water mass flow rate and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9-7.9 under no-wind conditions. An economic evaluationusing the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based onthe current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.

Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2003
Št. strani:str. 455-467
Številčenje:Letn. 75, št. 6
UDK:620.92
ISSN pri članku:0038-092X
COBISS.SI-ID:6909467 Povezava se odpre v novem oknu
Število ogledov:837
Število prenosov:356
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Solar energy
Skrajšan naslov:Sol. energy
Založnik:Association for Applied Solar Energy, Elsevier
ISSN:0038-092X
COBISS.SI-ID:5228039 Povezava se odpre v novem oknu

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