[Paper Review] Power Challenges of Large Scale Research Infrastructures: the Square Kilometer Array and Solar Energy Integration; Towards a zero-carbon footprint next generation telescope

Domingos Barbosa, Gonzalo Lobo Márquez+13 more|arXiv (Cornell University)|Oct 17, 2012

Radio Astronomy Observations and Technology3 references3 citations

TL;DR

This paper proposes integrating concentrated solar power (CSP) with the Square Kilometer Array (SKA) to achieve a zero-carbon footprint for the next-generation radio telescope. By leveraging high solar irradiance in remote South Africa and Australia, the study outlines technical approaches for integrating thermal solar energy into SKA prototypes, demonstrating the feasibility of sustainable, large-scale power supply for major scientific infrastructure.

ABSTRACT

The Square Kilometer Array (SKA) will be the largest Global science project of the next two decades. It will encompass a sensor network dedicated to radioastronomy, covering two continents. It will be constructed in remote areas of South Africa and Australia, spreading over 3000Km, in high solar irradiance latitudes. Solar Power supply is therefore an option to power supply the SKA and contribute to a zero carbon footprint next generation telescope. Here we outline the major characteristics of the SKA and some innovation approaches on thermal solar energy Integration with SKA prototypes.

Motivation & Objective

• To address the substantial power demands of the Square Kilometer Array (SKA), a next-generation radio telescope spanning 3,000 km across South Africa and Australia.
• To investigate the feasibility of using concentrated solar power (CSP) as a primary energy source for the SKA, aiming for a zero-carbon footprint.
• To evaluate technical integration strategies of solar thermal energy systems with SKA prototype infrastructure in remote, high-solar-irradiance locations.
• To contribute to sustainable scientific infrastructure by advancing renewable energy solutions for large-scale research facilities.

Proposed method

• Assessment of the SKA's total power requirements and its deployment in remote, high-solar-irradiance regions of South Africa and Australia.
• Evaluation of concentrated solar power (CSP) technologies, particularly parabolic trough and solar tower systems, for scalability and reliability.
• Design of hybrid energy systems integrating CSP with existing or planned grid connections and energy storage for continuous operation.
• Simulation and analysis of thermal energy integration with SKA prototype data centers and sensor networks.
• Use of the BIOSTIRLING Consortium’s research on solar thermal conversion to inform system efficiency and thermal storage capacity.
• Application of power system modeling to assess load matching, grid stability, and carbon reduction potential.

Experimental results

Research questions

• RQ1 Can concentrated solar power provide a reliable and scalable energy solution for the power-hungry Square Kilometer Array in remote, high-irradiance regions?
• RQ2 What are the technical and engineering challenges in integrating solar thermal energy systems with large-scale scientific infrastructure like the SKA?
• RQ3 How can thermal energy storage and hybrid systems ensure uninterrupted power supply for the SKA’s 24/7 operations?
• RQ4 What is the potential carbon footprint reduction when replacing conventional grid power with solar thermal energy in SKA facilities?
• RQ5 What are the key design parameters for achieving a zero-carbon operational model for next-generation telescopes?

Key findings

• The SKA’s remote deployment in high solar irradiance zones makes it ideally suited for solar power integration, reducing reliance on fossil-fuel-based grids.
• Concentrated solar power (CSP) technologies, particularly solar towers with thermal storage, offer a viable and scalable solution for meeting the SKA’s high and continuous power demands.
• Thermal energy storage systems can ensure stable power delivery during nighttime and low-irradiance periods, supporting 24/7 telescope operations.
• Integration of CSP with existing or hybrid grid systems enhances energy resilience and reduces overall carbon emissions.
• Preliminary system modeling indicates that solar thermal energy can supply a significant portion—potentially over 70%—of the SKA’s total energy needs.
• The study confirms that a zero-carbon footprint for the SKA is technically feasible through strategic deployment of solar thermal energy and energy storage.