A software package for analysis of energy transfer in the receiver of solar parabolic cylindrical station

• Дата: 2016
• Автор: Knysh, L.
• Формат: Стаття
• Мова: rus
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2016
• Теми: solar parabolic cylindrical plant; receiver system of solar radiation; concentrator; tube receiver; multi-physical approach; солнечная параболоцилиндрическая станция; система приёма солнечного излучения; концентратор; трубчатый теплоприёмник; мультифизический подход; сонячна параболоциліндрична станція; система прийому сонячного випромінювання; трубчатий теплоприймач; мультифізичний підхід
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/119
• Назва журналу: Vidnovluvana energetika

Thermodynamic solar technologies are developed steadily all over the world. They are highly efficient, well-tested and have large element base. Different combined systems can bedesigned based on classic solar plants with parabolic cylindrical concentrators. These systems can be photovoltaic-thermal (PVT), solar-wind, solar-fuel etc. The economic efficiency of theseprojects depends on the choice of optimal parameters of the «Sun – concentrator – heat receiver» systems. This problem is solved using a multi-physical approach, which combines fewtechniques of a different mathematical nature.A software package includes three blocks. The block SUN models radiation heat transfer using the Monte-Carlo method. This modeling determines heat flow density in the focus of the concentrator, where the tube receiver is placed. The value of the focus spot is determined and the design of heat receiver is optimized. At the same time velocity profile for coolant is calculated in the blockSPEED. This profile depends on the chosen geometry of a receiver and coolant flow regime.Results obtained from block SUN define the boundary conditions in heat receiver. Temperature fields are calculated in block TEMPERATURE, which also receives velocity profile from block SPEED.The temperature fields in heat receiver and the average temperature at the exit from heat receiver are calculated. After that heat power of a receiver module is determined and comparedwith a design value. If the obtained value differs significantly from the design value, then an iterative procedure is used in order to find optimal parameters.Dynamic (coolant velocity and viscosity), geometrical (diameter of concentrator and receiver, quality of a surface of the concentrator, the method of thermal insulation and its thickness), thermal-physical (heat capacity of coolant and its thermal conductivity) properties are adjusted during this procedure. Some additional conditions (average wind velocity, the average temperature of the environment) also can be taken into account.