GB/T 41308-2022 in English
VALIDGuide for evaluating thermal energy storage system performance of solar power plant
- Issued on:2022-03-09
- Implemented on:2022-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$272.00
《GB/T 41308-2022太阳能热发电站储热系统性能评价导则》由TC565（全国太阳能光热发电标准化技术委员会）归口，主管部门为中国电力企业联合会。
Introduction
Analysis of the core content of the standard
| Evaluation dimensions | Direct heat storage system | Indirect heat storage system |
|---|---|---|
| Evaluation scope | From the outlet of the collector system to the return demarcation point | Heat transfer pipelines within the interface range of the charging and discharging heat exchange equipment |
| Dielectric loss calculation | Only heat storage medium (such as molten salt) is calculated | It is necessary to distinguish between heat storage medium and heat transfer medium |
| Temperature difference calculation | Mass weighting of single tank by region | Average of independent temperature measurement points of two tanks |
Detailed explanation of key technical indicators
Heat storage capacity calculation model
The standard provides three calculation methods:
1. Specific enthalpy difference method: Q=mTES×(hb-hc)/3.6×105
2. Integral specific heat method: requires temperature-specific heat capacity curve integration
3. Average specific heat method: suitable for linearly changing media
Charging and discharging heat performance test
Typical test requirements for molten salt storage tanks:
- Data collection interval ≤10 seconds
- Duration ≥2 charging and discharging cycles
- Temperature fluctuation is controlled within ±5℃
Key points and suggestions for implementation
- Evaluation cycle selection: It is recommended to use an annual cycle, including data of operating conditions in different seasons
- Data collection specifications: It is necessary to ensure that the meters are calibrated regularly, and it is recommended to adopt the measurement point layout scheme in Appendix E
- Dielectric loss control: The annual loss rate of molten salt should be calculated in combination with the liquid level difference method and density compensation
Standard evolution analysis
This standard establishes a complete evaluation system for solar thermal storage systems for the first time. Compared with existing specifications such as DL/T 5072:
- Adds innovative indicators such as equivalent heat storage time
- Clarifies the reference implementation mechanism of latent heat storage systems
- Introduces advanced benchmarking evaluation methods to promote industry technology upgrades
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