GB/T 17751-2021 in English
VALIDSurvey-evaluation method of energy utilization for transport ships
- Issued on:2021-05-21
- Implemented on:2021-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$250.00
$243.00
$243.00
《GB/T 17751-2021运输船舶能源利用监测评价方法》由348（交通运输部）归口，主管部门为交通运输部。
Introduction
Core changes in the standard revision
| Comparison dimensions | 1999 version | 2021 version | Technological evolution |
|---|---|---|---|
| Core indicators | Fuel unit consumption rate | EEOIM index | Introduction of environmental correction factor |
| Monitoring method | Mainly manual recording | Intelligent integrated monitoring | Add online collection system |
| Evaluation system | Two-level evaluation | Three-level nine-grade scoring | Refine weight allocation |
Analysis of key technical indicators
EEOIM index calculation model
The modified ship energy efficiency operation index is calculated by the formula: EEOIM=Σ(FCjm×CFj)/(mcargo×D), where:
- FCjm is dynamically compensated by the wave correction factor Awave and the wind correction factor Awind
- The drag coefficient values of typical ship types are shown in Appendix A of the standard. The recommended value for container ship headwind conditions is 0.7-0.9
- The monitoring data collection frequency is required to be 1-4 hours/time to ensure the timeliness of environmental parameters
Implementation and application suggestions
Data collection system construction
Suggested ships to be equipped with:
- Fuel flow meter in accordance with ISO8217 standard, with accuracy level not less than 0.5
- Ship motion attitude monitoring sensor, sampling frequency ≥1Hz
- Integrated data recording terminal, storage period ≥3 years
Score optimization strategy
| Score range | Improvement direction | Expected effect |
|---|---|---|
| 60-75 points | Improve SEEMP documents | +20 points (management item) |
| 75-85 points | Optimize speed strategy | EEOIM reduced by 3-5% |
Industry impact analysis
The implementation of the new standard will promote:
- The market size of ship energy efficiency monitoring equipment will increase by more than 12% annually
- The transformation rate of existing ship monitoring systems will be ≥ 80% by 2025
- A national unified ship energy efficiency big data platform will be established
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