Overview
IEC 62862-3-2:2018 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies general requirements and test methods for large-size parabolic-trough collectors used in solar thermal electric plants. This standard focuses on the optical and thermal performance characterization of these collectors, as well as the tracking accuracy of their one-axis solar tracking systems.
Designed solely for outdoor testing, IEC 62862-3-2:2018 applies to parabolic-trough collectors equipped with the manufacturer-supplied sun tracking mechanism. It excludes conditions involving phase-change of the working fluid. The document ensures consistent, reliable testing methodologies to evaluate the efficiency and accuracy of parabolic-trough solar collectors at large scales, supporting manufacturers, engineers, and researchers in quality assurance and development.
Key Topics
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Performance Testing Requirements
The standard defines test procedures for measuring the thermal and optical efficiency of parabolic-trough collectors. This includes the collector's ability to convert solar radiation into usable thermal energy.
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Tracking Accuracy Evaluation
It establishes methods to determine the precision of the one-axis solar tracking system, critical for maximizing solar energy capture by keeping the collector aligned with the sun.
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Instrumentation and Measurement
Specific instrumentation requirements include measurement of:
- Solar radiation
- Fluid flow rate
- Temperature at various points
- Wind speed
- Data acquisition systems for accurate result recording
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Test Setup and Procedures
Guidelines for test equipment installation, sample descriptions, and cleanliness protocols ensure reliable and repeatable test conditions.
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Result Calculation and Reporting
The standard details calculations for useful power output, incidence angle modifiers (IAMs), and validation of performance tests. It also includes templates for reporting results and uncertainties.
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Additional Technical Content
Annexes provide detailed descriptions of collector components such as reflectors, receiver tubes, bearing structures, and tracking systems, ensuring comprehensive evaluation.
Applications
IEC 62862-3-2:2018 is essential for organizations and professionals involved in:
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Solar Thermal Power Generation
Ensuring large-scale parabolic-trough collectors meet efficiency and operational standards for commercial solar power plants.
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Collector Design and Manufacturing
Verifying the quality, performance, and tracking accuracy of solar thermal collector products before deployment.
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Research and Development
Providing standardized methods to compare prototype and innovative collector designs under real outdoor conditions.
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Quality Assurance and Certification Bodies
Facilitating independent verification of solar collector performance for product certification and regulatory compliance.
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Project Engineering and Plant Operation
Supporting optimal design and performance assessment of solar thermal plants to maximize energy yield and operational reliability.
Related Standards
IEC 62862-3-2:2018 integrates with and references several related international standards to maintain coherence within the solar thermal and electrotechnical sectors:
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IEC TS 62862-1-1 – Solar thermal electric plants – Terminology: Ensures consistent use of technical terms across the solar thermal electric plant standards.
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ISO 9488:1999 – Solar energy – Vocabulary: Provides foundational solar energy terminology essential for clear communication.
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ISO 9806:2017 – Solar energy – Solar thermal collectors – Test methods: Offers additional standardized test methods related to solar thermal collectors, complementing IEC 62862-3-2.
By adhering to IEC 62862-3-2:2018, stakeholders can confidently assess the performance and operational precision of large-scale parabolic-trough collectors, advancing the adoption and optimization of solar thermal electric plants worldwide.
Keywords: IEC 62862-3-2, parabolic-trough collectors, solar thermal electric plants, solar collector testing, tracking accuracy, thermal performance, optical performance, solar energy standards, outdoor testing, solar thermal system components.