Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
EXPERIMENTAL-STUDY OF THE PERFORMANCE OF SOLAR DRYERS WITH PEBBLE BEDS
Autore:
HELWA NH; REHIM ZSA;
Indirizzi:
NATL RES CTR,SOLAR ENGN DEPT CAIRO EGYPT NATL RES CTR,DEPT MECH ENGN CAIRO EGYPT
Titolo Testata:
Energy sources
fascicolo: 6, volume: 19, anno: 1997,
pagine: 579 - 591
SICI:
0090-8312(1997)19:6<579:EOTPOS>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Keywords:
COMPOSITE MATERIALS; EFFICIENT DRYER; PACKED BED MODELING; PEBBLE BED; SOLAR ENERGY STORAGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
9
Recensione:
Indirizzi per estratti:
Citazione:
N.H. Helwa e Z.S.A. Rehim, "EXPERIMENTAL-STUDY OF THE PERFORMANCE OF SOLAR DRYERS WITH PEBBLE BEDS", Energy sources, 19(6), 1997, pp. 579-591

Abstract

Major problems of the arid region are transportation of agricultural products and losses due to spoilage of the products, especially in summer. This work presents the performance of a solar drying system consisting of an air heater and a dryer chamber connected to a greenhouse. The drying system is designed to dry a variety of agricultural products. The effect of air mass flow rate on the drying process is studied. Composite pebbles, which are constructed from cement and sand, are used to store energy for night operation. The pebbles are placed at the bottom of the drying chamber and are charged during the drying process itself A separate test is done using a simulator a packed bed storage unit, to find the thermal characteristics of the pebbles during charging and discharging modes with rime. Accordingly, the packed bed is analyzed using a heat transfer model with finite difference technique described before and during the charging and discharging processes. Graphs are presented that depict the thermal characteristics and performance of the pebble beds and the drying patterns of different agriculturalproducts. The results show that the amount of energy stored in the pebbles depends on the air mass flow rate, the inlet air temperature, and the properties of the storage materials. The composite pebbles can be used efficiently as storing media.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 00:51:01