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In this article, an experimental estimation of thermal efficiency of horizontal and vertical-finned double-pass solar air collectors integrated with drying chamber has been carried out. The rig consists of two main parts as solar collector and dryer. The system was installed in the laboratory of Szent István University, Gödöllő, Hungary. The absorbers were made from a copper integrated fins in horizontal and vertical directions. The test results showed that the daily efficiency increased by10% when the direction of fins have been changed from vertical to horizontal. After 5 h drying of 2 kg apple slices, the final weights were 1.16 and 1.37 kg by using horizontal and vertical-finned collectors, respectively. [ABSTRACT FROM AUTHOR]

An introduction to the periodical is presented including articles published related to papers of the European Drying Conference held in October 21–23, 2015; and role of Ian Kemp and Antonio Mulet as reviewers; and role of Arun S. Mujumdar as editor of the periodical.