SIGTTO Briefing Note IMO Data Collection System (DCS): Calculation of N2 in LNG/Информационная записка о системе сбора данных ИМО: расчет содержания азота в СПГ

Издание на английском языке
This book is a guide to managing and accounting for fuel and gas during the transportation and use of liquefied natural gas (LNG). It details the standards and regulations governing emissions, as well as the composition and characteristics of LNG and its boil-off gas (the evaporating portion of the fuel). Furthermore, the book contains methodologies for calculating gas consumption, including storage, compositional analysis, and the use of various calculation data. It is intended for professionals involved in the operation and monitoring of vessels and installations associated with the transportation and use of LNG, helping to ensure regulatory compliance and optimize accounting and reporting processes.

Content
1. Introduction and Scope
1.1. Introduction
1.2. Scope
2. DCS Regulation
2.1. Marpol
2.2. Guidelines
3. LNG Cargo
3.1. Composition of LNG
3.2. Boil-off Gas (BOG)
3.3. Nitrogen in BOG
3.4. Calorific Value of BOG
4. Reporting of LNG Consumption
4.1. Correction Factor
4.2. Molar Mass
4.3. Net Calorific Value
4.4. N2 Consumption
5. Calculation Data
5.1. Gas Chromatography
5.2. Empirical Calculations
5.3. Certified LNG Composition
5.4. Default Mass Value