Coil solar receiver for a stirling disk and method for manufacturing same

Abstract

Coil solar receiver for a Stirling disk, the main components of which are pipes (where the sun hits), collectors, tanks and cupolas (of which there are two types, one that houses the regenerator, and the expansion cupola that is the area where the working gas is at a higher temperature) that includes a series of pipes (1) that perpendicularly exit from one collector (2) and perpendicularly enter another (2) and where each pipe consists of two semicircumferential curved parts (10) and three straight parts (11) parallel to one another: a center straight part (between curve and curve) and two straight parts on the ends (between the curve and the exit of one collector (2)), the two straight end parts being located on the same plane, while the center straight part is located in a separate plane.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The invention is framed within the technology of solar collectors and more specifically it is focused on the design of solar receivers for Stirling disk.BACKGROUND OF THE INVENTION[0002]The Stirling disk systems are electricity generation units that use solar radiation as a source of energy. The capacity of a single unit is between 3 and 50 kWe.[0003]The Stirling disk systems transform with high efficiency the concentrated solar radiation into electrical energy. The essential components of the system are:[0004]Parabolic solar concentrator.[0005]Tracking system.[0006]Stirling Engine with electric generator.[0007]Solar heat exchanger (solar receiver).[0008]The mode of operation of a Stirling disk system is the following: the concentrator reflects the solar radiation to the receiver which is located at the focal point of the concentrator. The solar radiation is absorbed in the receiver and this heats the gas (helium or hydrogen) of the Stirling eng...

AI Technical Summary

Benefits of technology

The patent describes a new design for solar receivers that optimize the use of concentrated solar light. The receivers have pipes that form the surface where the solar light beam passes through, arranged close to each other to maximize the striking radiation. This design allows for improved thermo-mechanical behavior and complies with the design constraints of existing receivers.

Problems solved by technology

The high temperature is the most important factor which, together with cycle operation, gives rise to the thermal fatigue of the components.

Thermal fatigue is caused by the temperature cycles, from room temperature to operation temperature, both in the starts and stops and during the moments of cloudiness.

This type of cycle can cause premature failure of the receiver.

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