QX/T 449-2018 in English
VALIDSpecifications for climatic feasibility demonstration一in-situ observation
- Issued on:2018-09-20
- Implemented on:2019-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
Introduction
Standard Background and Technological Evolution
As a professional specification under the GB/T 1.1-2009 system, this standard fills the technical gap in on-site observation in the field of climate feasibility demonstration. Compared with related standards such as QX/T 423-2018, its innovation is reflected in:
| Comparison dimensions | QX/T 449-2018 | QX/T 423-2018 |
|---|---|---|
| Scope of application | Special field observation | General requirements for report preparation |
| Technical indicators | ClearlyValid data integrity rate ≥ 90% | Not specifically quantified |
| Instrument management | Includes a clause for Mandatory verification after extreme events | Not covered |
Technical analysis of core elements
4.1 Principles for selection of observation elements
Adopt a three-level decision-making mechanism: project characteristics → specification requirements → regional characteristics. In special circumstances, the following items need to be added:
- Offshore projects: wave height, salt spray concentration
- Alpine regions: freeze-thaw cycle frequency
- Industrial areas: atmospheric corrosive substance monitoring
5.2.1 Ground Observation Site Construction
Site sizes are configured in a graded manner:
| Observation type | Minimum size | Extension requirements |
|---|---|---|
| Full-element observation | 25m×25m | Radiation observation requires north-south direction +10m |
| Dedicated for automatic stations | 7m×10m | The distance between instruments must be ≥3m. |
Technical requirements for key instruments
6.1.2 Observation tower instrument installation case
An offshore wind power project uses the following installation scheme for three-dimensional ultrasonic anemometers:
- Installation height: 10m/30m/50m/70m/100m
- Boom length: 3 times the mast diameter (exceeding the standard requirement of 2.5 times)
- Anti-salt spray treatment: Add a special anti-corrosion coating
Implementation recommendations
Data quality control
It is recommended to establish a three-level audit mechanism:
- Real-time automatic quality control: range check, mutation detection
- Daily manual review: combined with actual weather verification
- Monthly comprehensive assessment: statistical effective data completeness rate
Special environment response
Notes for observations in plateau areas:
- Pressure sensor requires special calibration
- UV radiation range extended by 30%
- Use of low-temperature data collector
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