869569269

Paweł Chorab

Paweł Chorab

	LNG-s	LNG-m
Deadweight capacity DWT [t]	67 900	62 700
Length overall Loa [m]	290	275
Length between perps Lbp [m]	275	260
Breadth B [m|	48.1	43.4
Moulded depth H [m]	27	26
Mouldcd draft T [m]	11.7	11.95
Volume of cargo tanks VH [m']	135 000	130 000
Yolume of ballast tanks VB [m’]	63 000	46 000

LNG-m - LNG carricr with membranę takns LNG-s - LNG carrier with spherical tanks

-    determine the probability of ship safety risk and its duration during ballast exchange in specific weather conditions,

-    dcfine possibilities of reducing thc risks by altcr-ing ship's course and/or specd. or possibly the change in the seąuence and number of simulta-neously emptied and refilled ballast tanks,

-    search for an optimal seąuence of emptying and refilling in given operational conditions (ship's speed and course, weather conditions),

-    determine an optimal ąuantity of ballast water (including the number of tanks and their loca-tion) needed to ensure ship safety in a given operational situation.

Liquid cargo handling Simulator

One of the modules of a Liąuid Cargo Handling Simulator is the ballast module referred to as Ballast control system - Lim and valves. The inclusion of this module in the Simulator eąuipment puts its software in compliance with IMO model courses for tankers: IMO 1.35 LPG Tanker Cargo & Ballast Handling, IMO 1.36 LNG Tanker Cargo <£ Ballast Handling, IMO 1.35 Chemical Tanker Cargo & Ballast Handling.

Two examples of ships with essential informa-tion on the simulation of ballast installation opera-tion on LNG carriers are given in table 1.

Table 1. Main particulars of selectcd LNG-s and LNG-m carriers [7]

Tabela 1. Dane techniczne przykładowych gazowców typu LNG-s, LNG-m [7]

The LNG-s ballast installation consists of: eight portside tanks: BS1P - 2055 m³, BD2P -3594 nr. BS4P - 2379 m³, BD5P - 4238 m³, BS7P - 2706 nr³, BD8P - 4262 nr\ BS10P -2462 m³, BD11P - 2108 m³;

Fig. 1. Visualisation of the ballast installation of an LNG-s carrier (spherical cargo tanks) [7]

Rys. 1. Wizualizacja schematu instalacji balastowej gazowca ,.LNG-s" (sferyczne zbiorniki ładunkowe) [7]

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Scientific Journals 25(97)