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

### Abstract

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 be

designed 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 these

projects 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 few

techniques 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 block

SPEED. 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 compared

with 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.

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*Vidnovluvana Energetika*, (2 (45), 35-40. Retrieved from https://ve.org.ua/index.php/journal/article/view/119

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