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温室气体排放评级的源数据、假设和文件

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温室气体排放评级源数据

查看用于计算船舶温室气体排放等级的数据,可以通过:

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  • RightShip Qi – 供RightShip客户使用
  • 发电子邮件到环保团队,他们将为您的温室气体排放评级和船舶验证流程提供帮助
  • 通过海运能效网站,该网站提供温室气体排放评级情况的免费权限。可以设置用户名和密 码以获得访问权限。

RightShip认识到其计算可靠性直接与源数据的准确性相关。RightShip继续与船东、管理人、船厂和船级社密切合作,以确认用于计算数据的有效性。

用于温室气体评级计算的数据在切实可行的范围内符合用于EEDI计算的IMO指南(MEPC.245(66))。RightShip从以下各种行业获取温室气体评级的数据:

温室气体评级的源数据基于下表中的等级。

正如DNV GL评审所述,由于对“未核实”的船舶使用了预定义的一组数据假设,促使船东更新Qi内的相关数据,因为这有可能会让温室气体的评级更高。

PREFERENCE / VERIFICATION LEVELDATA TYPEDATA SOURCE / EXAMPLE
Most preferred / highest level of verification
Energy Efficiency Design IndexClassification Societies e.g. EEDI Technical Files

EEDI certificate (including supplement)
Ship specific specificationsShip-sourced data, e.g. sea trial and shop test supplied by the vessel owner / manager
Industry / third party data sourcesEngine manufacturer's specifications

Data sourced from ship yards
Least preferred / benefit from verification
IHS Maritime database

Industry publications
IMO publications

IHS Maritime Database

RELEVANT DOCUMENTATION

The following documentation is requested to ensure the ship particulars are up to date:

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  • EEDI Technical File – as defined in the IMO Guidelines (MEPC.245(66)) for EEDI calculation.

If the EEDI Technical File is not available, please provide the documentation outlined in the table below.

Upon receipt of the documentation, RightShip’s sustainability team will review and update the vessel particulars and provide the updated GHG Rating.

DOCUMENTATION TYPERELATING FACTORRELEVANT DETAILS
Sea TrialVref Speed (Knots)Trial Speed at Summer/ Scantling Load Draught at 75% Maximum Continuous Rating (MCR). In the form of a sea trial curve (calculated and/or model curves are acceptable)
Shop Test - Main and Auxiliary EnginesNumber of Engines

Power of engines (MCR)

Specific Fuel Consumption (SFC)

Fuel Type (test conditions)
SFC for the Main Engine is read at 75% MCR

SFC for the Auxiliary Engines is read at 50% MCR
Class Certificate and/or Ship Capacity PlanCapacityDeadweight (DWT)

Gross Tonnage

TEU (if applicable)

CBM (if applicable)
Ship classification notationsCommon Structural Rules (include LBP and LWT)

Ice-class

Shuttle tankers

Cubic-capacity correction factor

General cargo equipped with cranes
Other documentation as appropriateInnovative energy efficient technologies Examples include waste heat recovery and shaft motor generator

ENGINE SPECIFIC FUEL CONSUMPTION (SFC) ASSUMPTIONS

As stated above, SFC figures are sourced from vessel-specific shop tests or EEDI technical files.

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If the data is not provided by the ship owner, the values used in the calculation are based on the same assumptions used in the IMO GHG Study and / or detailed in IMO Circulars on the calculation of the energy efficiency measure as listed below.

Main Engine Assumptions (SFCME)
ENGINE AGEMCRME (kW)SFCME (g/kWh)
Pre 1983> 15,000205
5,000 to 15,000215
< 5,000225
1984–2000>15,000185
5,000 to 15,000195
< 5,000205
2001–2007>15,000175
5,000 to 15,000185
< 5,000195
Post 2008>15,000175
5,000 to 15,000185
< 5,000195
Auxiliary Engine Assumptions (SFCAE)
MCRAE (kW)SFCAE (g/kWh)
> 800 kW220
< 800 kW230

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