 Closed-loop oscillating heat-pipe with check valves (CLOHP/CVs) air-preheater for reducing relative humidity in drying systemsP. Meena, S. Rittidech and N. Poomsa-ad Applied Energy, 2007, vol. 84, issue 4, 363-373 Abstract: A CLOHP/CV air-preheater has been used for recovering the waste heat from the drying cycle. The CLOHP/CV heat-exchanger consisted of copper tubes 3.58 m long and internal diameter 0.002 m. The evaporator and condenser sections were 0.19 m long, the adiabatic sections 0.08 m long, the hot air velocity was 0.5, 0.75 or 1.0 m/s with the hot air temperature 50, 60 or 70 °C, and the relative humidity was 100%. The working fluid was R134a with a filling ratio of 50%. The hot-air temperature increased from 50 to 70 °C; the heat-transfer rate increased slightly. The velocity increase from 0.5 0.75, to 1.0 m/s led to the heat-transfer rate slightly decreasing. The velocity increase from 0.5 to 1 m/s led to a slight decrease in effectiveness. As the hot-air temperature increases from 50 to 70 °C, the effectiveness slightly increased; and the relative humidity was reduced to the range 54-72% from 89% to 100%. The CLOHP/CV air-preheater can reduce the relative humidity and achieve energy thrift. Keywords: Closed-loop; oscillating; heat-pipe; Check; valves; Air-preheater; Relative; humidity; Heat; recovery; Drying; system (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:84:y:2007:i:4:p:363-373 Ordering information: This journal article can be ordered from Access Statistics for this article Applied Energy is currently edited by J. Yan More articles in Applied Energy from Elsevier |
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