ТЕПЛОФІЗИЧНІ ВЛАСТИВОСТІ НАСІННЯ ДИНІ ТА ТЕПЛОМАСООБМІН В ПРОЦЕСІ ЙОГО СУШІННЯ.

Н. В., Дмитренко; С. О., Іванов; Н. О., Дабіжа

Drying is the main technological stage of seed preparation for long-term storage. During drying moisture is removed from seeds to a level that microbial spoilage stops and enzymatic activity minimizes. In order to preserve germination seeds are usually dehydrated in convective dryers at such parameters of the drying agent that do not exceed the maximum allowable heating temperature of the material. The article presents the results of comprehensive studies of "Pineapple" melon seeds as a drying object with the aim of developing energy-efficient dehydration regimes. Using the DMKY-01 differential microcalorimeter, experimental and calculated studies of the heat capacity of melon seeds and heat consumption for moisture evaporation from it were carried out. The formula for calculating the specific heat capacity of melon seeds in the range of changing relative humidity from 10,4 to 37,5 % and temperature from 32,5 to 92,5 °C is given. According to the results of studies of heat and mass exchange processes during convective drying of melon seeds at coolant temperatures of 40, 50 and 60 °C and experimentally determined thermophysical properties, calculations of Rebinder's criterion and heat flows on the surface of the material were carried out. On the basis of the combined analysis of the obtained experimental and calculation data, it was concluded that for the rational use of energy and preservation of the quality and germination of melon seeds, it is advisable to convectively dry them at a coolant temperature of 40 °C to relative humidity of seeds 15 %. After relative humidity of seeds reaches 25 % it is necessary to reduce the energy input, because heat flows on the surface of the material from this moment of the drying process stabilize at a very low level.

ENERGY conservation; SPECIFIC heat capacity; HEAT capacity; DRYING agents; HUMIDITY; PINEAPPLE

Scientific Works, 2024, Vol 87, Issue 1, p11

2073-8730

Academic Journal

10.15673/swonaft.v88i1.2954