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Experimental Performance of a Solar Tunnel Dryer for Drying Silkworm Pupae by Tawon Usub; Charoenporn Lertsatitthanakorn; Nattapol Poomsa-ad; Lamul Wiset; Lifeng Yang; Sirithon Siriamornpun is a Agricultural and Biological Sciences article available to read on EtoBox.

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The objective of this study was to conduct an experimental analysis to investigate the performance of a mixed mode type forced convection solar tunnel dryer (STD) which was used to dry silkworm pupae under tropical weather conditions of Mahasarakham, Thailand. The dryer consisted of a transparent glass covered flat-plate collector and a drying tunnel connected in series to supply hot air directly into the drying tunnel using a blower. The dryer was 6.2 m long and 1.8 m wide. The drying unit had a loading capacity of 30 kg of silkworm pupae. The effect of the drying air flow rate was examined. The drying time depended on the drying air flow rate and temperature. Moisture content of the silkworm pupae was reduced from 3.70 kg H 2 O kg À1 dry matter to 0.20 kg H 2 O kg À1 dry matter in 570 min at the corresponding air flow rate of 0.30 kg s À1 and it took 945 min in open sun drying; drying time was reduced by about 40%. A quality assessment shows that the lipid content of the dried silkworm pupae was not affected by the STD. A slight decrease of polyunsaturated fatty acid (PUFA) was observed. Maximum drying and overall efficiencies were 30.14% and 19.68%, respectively, at the air flow

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Author

Tawon Usub; Charoenporn Lertsatitthanakorn; Nattapol Poomsa-ad; Lamul Wiset; Lifeng Yang; Sirithon Siriamornpun

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 1537-5110)

Published

2008

Language

EN

Field

Agricultural and Biological Sciences (Physical Sciences)