IEC 62862-1-6:2024

Overview

IEC 62862-1-6:2024 is an International Electrotechnical Commission (IEC) standard that establishes technical requirements, test methods, inspection procedures, and recommended practices for silicone-based heat transfer fluids (SiHTF), specifically for use in line-focus concentrated solar power (CSP) plants. This document is essential for stakeholders in the solar thermal power sector, providing guidelines for safety, quality, environmental considerations, and operational management of polydimethylsiloxane-based heat transfer fluids in solar thermal electric plants.

Key Topics

• Technical Requirements: IEC 62862-1-6:2024 details parameters such as appearance, chemical composition, water content, acid number, chlorine and sulfur content, viscosity, density, pour point, boiling range, thermal stability, and more for silicone-based heat transfer fluids. These requirements help ensure fluid suitability and long-term performance in CSP systems.
• Test Methods: The standard specifies accepted test methods for evaluating SiHTF properties. This includes internationally recognized methods for chemical analysis, physical testing, and performance verification. It introduces new techniques to determine the applicability and thermal stability of polydimethylsiloxane-based fluids.
• Inspection and Sampling: Guidance is provided on inspection intervals, fluid sampling techniques, and documentation to maintain operational safety and fluid integrity throughout the lifespan of a solar thermal plant.
• Labelling and Documentation: Requirements for product marking, labelling, safety data, and accompanying documentation are addressed to support traceability, safe handling, and regulatory compliance.
• Recycling, Disposal, and Replacement: The standard sets forth rules for environmentally responsible recycling, disposal, and replacement of used SiHTF, helping operators manage end-of-life fluids reliably and sustainably.

Applications

IEC 62862-1-6:2024 is directly applicable to:

• Line-Focus CSP Plants: The standard is focused on systems using line-focusing mirrors (such as parabolic trough collectors), where silicone-based heat transfer fluids are used to collect and transport thermal energy.
• Solar Thermal Power Installations: Facilities using polydimethylsiloxane fluids for heat transfer benefit from standardized guidelines covering safety requirements, physical properties, and quality control.
• Manufacturers and Suppliers: Producers and distributors of SiHTF can reference this standard to ensure product quality and regulatory alignment, improving customer confidence and market access.
• O&M Teams and Inspectors: Operators, maintenance personnel, and plant inspectors gain practical criteria for routine monitoring, testing, and fluid management, supporting efficient and safe CSP plant operation.
• Environmental Compliance and Safety Professionals: The standard supports sustainable practices in recycling, disposal, and safe handling across the CSP industry.

Related Standards

For comprehensive application and implementation, IEC 62862-1-6 should be used in conjunction with the following references and related documents:

• IEC TS 62862-1-1: Terminology for solar thermal electric plants
• UNE 206015: Heat transfer fluids requirements for solar thermal power plants
• DIN 4754-1: Safety requirements for thermal installations with organic heat transfer fluids
• ISO 2049, ISO 2160, ISO 2719, ISO 3016, ISO 3104, ISO 3405, ISO 3675: International standards covering testing methods for petroleum and thermal fluids
• ISO 12937, ISO 15597, ISO 20846: Methods for determination of water, chlorine, and sulfur content in fluids

Practical Value

Adopting IEC 62862-1-6:2024 enhances:

• System Efficiency: By ensuring only fluids meeting defined standards are used, the operational efficiency and longevity of CSP plants is increased.
• Operational Safety: Clear procedures for handling, labelling, and monitoring help maintain worker and plant safety.
• Regulatory Compliance: Organizations can more easily comply with international and national regulations regarding solar thermal installations and chemical safety.
• Environmental Stewardship: Guidance on recycling and disposal supports sustainable practices and minimizes environmental impact.

IEC 62862-1-6:2024 is fundamental for anyone involved in line-focus concentrated solar power projects using silicone-based heat transfer fluids, setting the benchmark for quality, safety, and sustainable management.