New constructions of dryers for production of environmentally safe cereal products at reduced specific energy consumption.

Bezbah, Igor; Zyko, Aleksandr; Bandura, Valentyna; Osadchuk, Petr; Paladiichuk, Yurii; Mazurenko, Igor

The design of an energy-efficient block grain dryer with evaporative-condensing energy supply systems has been developed. The dryer contains a drying shaft, a condenser, a steam generator that comprise an evaporative-condensing module, and a fan. Design features of the dryer enable to carry out the drying process without direct contact of combustion gases and the product. Analytical modeling of the grain drying process has been carried out. It is based on a two-component model of heat transfer between thermosiphons and a layer of bulk material, taking into account evaporation of moisture from the grain. The efficiency of the developed structure has been evaluated according to such indicators as coefficients of heat transfer to grain flow; specific energy consumption. The values of coefficients of heat transfer to grain flow are 60 W m-2 K-1. An increase in the grain flow rate leads to an increase in the heat transfer coefficient. Energy costs approach the minimum when drying at the temperature of the surface of thermosiphons Ts=140 ° for different grain consumptions. Energy consumption is 3.35.15 MJ/kg, depending on the surface temperature and air consumption.

GREEN products; ENERGY consumption; HEAT transfer coefficient; COMBUSTION gases; POWER resources; GRAIN

Przegląd Elektrotechniczny, 2023, Vol 2023, Issue 10, p110

0033-2097

Academic Journal

10.15199/48.2023.10.21