RENEWABLE ENERGY SOURCES IN HEAT PUMPS FOR ENERGY EFFICIENT LOW-TEMPERATURE DRYING OF SEED GRAIN

• Дата: 2025
• Автори: Sniezhkin , Yu., Paziuk , V., Samoilenko , K., Dakhnenko, V., Biriukov , S.
• Формат: Стаття
• Мова: English
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2025
• Теми: energy efficiency; drying unit; heat pump; germination; rapeseed.
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/538
• Назва журналу: Vidnovluvana energetika

High energy costs for the process of drying seed grain materials require the development of advanced energy-efficient technologies. Drying seed materials requires soft drying modes, so it is not possible to dry them at high temperatures, which is related to the quality of the material. The analyzed methods of drying rapeseed indicate that the main method of drying is convective. There is a problem with high energy costs for the process, which is associated with low-temperature drying and the imperfection of existing drying equipment. Also, existing drying methods such as sublimation, infrared, microwave and ultrasonic in this case will significantly affect the quality of the material, so it is undesirable to use them. Therefore, to enhance the intensity of drying, if it is necessary to create a low-temperature drying process, the condensation method of drying is employed, alongside a reduction in the moisture content of the heat carrier.  The application of this technology solves a number of tasks, such as: economy, environmental friendliness, manufacturability and operational expediency of the drying unit. The presented research solves the urgent task of intensity and economy, preservation of all seed properties of the material, using the example of rapeseed. Based on the presented tasks for improving the operation of the seed dryer, an installation with an installed heat generator on a heat pump (HP) was developed, which allows for implementing and solving all the stated tasks. As a result of the research, when comparing a drying plant with a heat pump to a drying plant with electric heating by electric heaters, the quality of rapeseed improved by 3%, the specific heat consumption decreased by 3.3 times, the intensity increased by 13%, the efficiency of the drying plant with the heat pump increased to 58.4 %.