eprintid: 3870 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/00/38/70 datestamp: 2023-11-09 15:52:08 lastmod: 2023-11-09 15:52:08 status_changed: 2023-11-09 15:47:48 type: article metadata_visibility: show creators_name: Yassen, T.A. creators_name: Al-Kayiem, H.H. creators_name: Habib, K. title: Design and performance investigation of a thermal back-up system for hybrid drying ispublished: pub keywords: burning; design; equipment; operations technology; performance assessment; solar power; temperature profile note: cited By 2 abstract: A major setback in the solar drying technique is the lack of solar energy during cloudy and rainy days as well as during the night. Thus, the hybrid solar - thermal drying techniques are feasible as a practical solution. This paper presents the design, fabrication, and test of a thermal back-up unit comprising a burner and a gas to gas heat exchanger. The test was accomplished with a feeding rate of 0.426 and 0.271 kg/hr of coal. Results have shown that the temperature of the supplied hot air at the feeding rate of 0.426 kg/hr, was higher than the ambient temperature by 60°C maximum, while it is 40°C maximum with feeding rate of 0.271 kg/hr. The decrease in the feeding rate of coal leads to a stable hot air temperature for a long time of burning. The present thermal back-up unit is feasible for providing hot air suitable for the drying of any type of agriculture, forest, and food products. The advantage of using such a system is important in the rural areas, where it operates and performs hybrid drying, free of electricity. © 2013 WIT Press. date: 2013 publisher: WITPress official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896101446&doi=10.2495%2fSC130782&partnerID=40&md5=d8f0eb5c2ac4fb600955b7d277d0d612 id_number: 10.2495/SC130782 full_text_status: none publication: WIT Transactions on Ecology and the Environment volume: 179 VO pagerange: 921-931 refereed: TRUE isbn: 9781845647469 issn: 17433541 citation: Yassen, T.A. and Al-Kayiem, H.H. and Habib, K. (2013) Design and performance investigation of a thermal back-up system for hybrid drying. WIT Transactions on Ecology and the Environment, 179 VO. pp. 921-931. ISSN 17433541