Torque transfer between trough collector modules

Abstract

A system for transferring torque between modules in a concentrating solar collector array. A trough collector system includes at least two modules, each module including a reflector having a reflective surface shaped to concentrate incoming radiation onto a linear tube, and a structural lattice attached to the reflector. The modules are constrained to rotate about a common axis. A torque transfer connection directly connects the three-dimensional structural lattices of the two modules at a location removed from the axis of rotation. Torque is thus transmitted between the modules by a force couple acting on the module. Also described are a method of transferring torque between adjacent trough collector modules, and a three-dimensional structural lattice configured for use in the system and method. Mechanisms for accommodating thermal expansion and contraction of the array are described. A drive system is described that imparts torque to a module near an edge of the module.

Description

Background technique [0001] Solar trough collectors are a well-known collector technology used in concentrated solar power (CSP) plants. Such as figure 1 As shown in , such plants typically utilize a large array of solar-tracking focusing reflectors that concentrate incoming solar radiation onto tubular conduits containing a working fluid. The concentrated radiation heats a working fluid such as oil or other fluid. The heated fluid is piped to a central location where its accumulated thermal energy can be used in a conventional heat engine, for example to generate steam that drives a turbine to generate electricity. In other applications, the heated fluid can be used directly, for example where the heated fluid is used to heat domestic or commercial water. After its thermal energy has been utilized, the fluid can be recirculated through the array of collectors to be reheated. [0002] Collector arrays can be very large, covering several square kilometers and including thou...

AI Technical Summary

Problems solved by technology

It requires excessive torque transfer shaft lengths to provide clearance between each module frame and its supporting structure at both temperature extremes

This further increases the cost of the material used for the shaft, and the increased shaft length further reduces the shaft stiffness, which exacerbates the aforementioned deflection problems

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