Overview
ISO 24194:2022 - Solar energy - Collector fields - Check of performance defines standardized procedures to verify the thermal performance of solar thermal collector fields. The standard covers two complementary check methods: one for the thermal power output of a collector field and one for the daily energy yield. It applies to glazed flat plate collectors, evacuated tube collectors and tracking or concentrating collectors used in fields, and is intended for collector fields of all sizes. The procedures compare measured outputs with calculated estimates and specify measurement, data-quality and operating-condition requirements.
Key topics and technical requirements
- Two verification procedures
- Power-performance check (instantaneous or average thermal power)
- Daily-yield check (daily energy output)
- Performance comparison: How to calculate expected output and compare measured vs calculated values, including rules for declaring conformity.
- Collector types covered: Glazed flat plate, evacuated tube, and tracking/concentrating collectors.
- Measurement requirements: Guidance on sensors and measurements for solar irradiance, fluid temperatures, flow rate, wind speed, and power calculation; requirements for accuracy, time resolution and valid data records.
- Operating restrictions and data validity: Conditions under which checks are valid; determination of potential valid periods and handling of shading, incidence angles and flow/distribution issues.
- Uncertainty and safety factors: Three accuracy levels (Level I and Level II/III) with example safety factors (e.g., f = 0.95 for higher accuracy Level I; f = 0.90 for Level II/III) and considerations for measurement and model uncertainties.
- Ancillary topics: Effects of shading (row and tracking configurations), collector incidence angle modifiers, heat loss coefficients, and reporting formats (informative annexes).
Practical applications and users
ISO 24194:2022 is designed for professionals who need reliable, repeatable methods to verify the performance of solar thermal collector fields:
- Solar system designers and engineers validating field output
- Commissioning agents and testing laboratories
- Plant operators and asset owners performing acceptance tests or periodic verifications
- Consultants, certifiers and insurers assessing performance guarantees or contractual compliance
Using this standard helps ensure objective, comparable checks of collector field thermal power and daily yield, supporting commissioning, warranty claims, performance guarantees and performance monitoring.
Related standards
- ISO 9060 - instruments for measuring solar radiation
- ISO 9488 - solar energy vocabulary
- ISO 9806 - solar thermal collector test methods
Keywords: ISO 24194:2022, solar thermal collector fields, collector field performance, daily yield, thermal power output, glazed flat plate collectors, evacuated tube collectors, tracking concentrating collectors, solar energy standard.
