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Dense packaged and hybrid solar field concepts for solar plants

IP.com Disclosure Number: IPCOM000227870D
Publication Date: 2013-May-23
Document File: 6 page(s) / 206K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention consists of two main parts: 1) dense packaged solar fields with lower total land use 2) dense packaged hybrid solar fields for enhanced operation strategies.

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Dense packaged and hybrid solar field concepts for solar plants

Abstract

This invention consists of two main parts: 1) dense packaged solar fields with lower total land use 2) dense packaged hybrid solar fields for enhanced operation strategies.

Dense packaged solar fields allow for higher solar multiple of single receiver (e.g. CSP linear Fresnel) or combined hybrid solar fields consisting of CSP linear Fresnel and single axis tracked PV receivers. Plant operation benefits by using dense packaged solar fields depend on the configuration. CSP solar field with higher solar multiples on lower total covered land allows for higher dispatchability if the system includes thermal storage. Hybrid solar fields benefit further from higher total capacity factors with lower solar multiple configurations than afore mentioned dense packaged linear Fresnel based CSP system

Principal Applications/Uses of the Invention

This invention reduces total land use of CSP linear Fresnel systems. In addition to that the same concept can be used as well to combine linear Fresnel CSP and single axis tracked PV technology to a hybrid plant configuration. This hybrid plant configuration has advantages due to use of synergies in structural and control components and a resulting higher total capacity factor.

Problem Overcome by the Invention

CSP systems in general have the drawback of considerable total land use. Although linear Fresnel based CSP systems have a comparable low total land use compared to parabolic trough or power tower systems, it needs a non mirror covered maintenance area between adjacent receiver rows of at least ¼ of the total land use (Fig.1). This unused space leads to lower solar multiple per total covered land and results in lower system capacity factors.

Therefore, this invention focuses the reduction of maintenance area and improvement of system capacity factors by:

- Dense packaged solar field without any additional land use for maintenance

- Optimized system capacity factor and optionally lower LCOE by combination of linear Fresnel CSP and single axis tracked PV system.

Detailed Description of the Invention

This invention covers two applications:

- Dense packaged linear Fresnel CSP field

- Hybrid solar field: Linear Fresnel CSP and single axis tracked PV solar field

Dense packaged CSP linear Fresnel field:

Fig. 2 illustrates 5 concepts for dense packaged linear Fresnel CSP fields with resulting higher solar multiple on low total land use. As the usual maintenance area covers at least ¼ of the total land use, the mirror covered area can at least be enlarged by ¼ without any additional land use. In addition to that, tracking systems can be coupled between rows, what reduces tracking system costs. Depending on the chosen concept, receivers and mirrors are accessible for maintenance by translative, rotational or combined movement.

The resulting system with higher solar multiple allows for enhanced dispatchability and lower LCOE in combination with a...