Özet:

The object of research is an improved flexible film resistive electric heater of emitting type (FFREHET) for creating a non-reflector IR dryer and vegetable raw material on the example of Antonovka apples. It is proposed to improve the FFREHET by spraying a resistive element based on current-conducting nichrome paste on a flexible electrical insulating film with additional coating on top and bottom by layers of a flexible electrical insulating film. Also, FFREHET is provided with drainages for connection to the power grid. The spectral-optical properties of the Antonovka apple are determined, namely the acceptable IR regions of its absorbing capacity (2.5...3, 6, 9 and 12...15 μm). This confirms the effectiveness of using FFREHET during the drying of plant raw materials. It is confirmed the low inertia of the FFREHET at a temperature of 60 ºC with the heating duration τ/ = 87 s, which simultaneously corresponds to the constant uniform temperature of the working surface and is characterized by a clear dynamics of operation. Non-reflector VC IR dryer with a vibrating mechanism and a heat exchanger is developed. Improved FFREHET follows the geometric shape of the working chamber of the device, ensuring a reduction in the geometric dimensions and simplicity of device design. According to experimentally obtained kinetics of moisture content for Antonovka apples, the shortest duration of heat treatment is 160 s-1 with conservation of BAS and natural color. Author Biographies Lyudmila Kiptelaya, Kharkiv State University of Food Technology and Trade, Klochkivska str., 333, Kharkiv, Ukraine, 61051 Doctor of Technical Sciences, Professor Department of Processes, Devices and Automation of Food Production

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