# Effect of Parameters on Vapor Generation in Ship-to-Ship Liquefied Natural Gas Bunkering
## 3 Simulation and Input Preparation
\begin{table}
\begin{tabular}{l c c c} \hline \hline
**Parameter** & **Value** & **Unit** & **Notes** \\ \hline Bunkering line diameter (Nominal) & 8 & inch & Sch10S (3.76 mm), Inner diameter 211.58 mm \\ Total length of LNG bunkering pipe, I\({}_{\text{pipe}}\) & 112 & m & Sch10S (3.40 mm), Inner diameter 161.5 mm \\ Hose length, L\({}_{\text{hose}}\) & 10 & m & Reference [29] \\ Hose pressure drop, \(\Delta\text{P}_{\text{hose}}\) & 0.1 & bar/m & Hose pressure drop of 0.1 bar/m is applied for liquid line only \\ Pipe insulation thermal conductivity, k\({}_{\text{insulation}}\) & 0.021 & W/m-K & PUF (Polyurethane foam) at -162 \({}^{\circ}\)C, 1 atm and density of 32 kg/m\({}^{3}\)[30] \\ Pipe insulation thickness, l\({}_{\text{Insulation}}\) & 50 & mm & Assumed \\ Overall heat transfer coefficient of liquid line, U\({}_{\text{pipe}}\) & 1.730 & kJ/m\({}^{\text{m}}\)-2\({}^{\circ}\)K & Calculated \\ Total bunkering flow rate & 500 & m\({}^{3}\)/h & Bunkering duration of about 2 h assumed \\ Topping up flow rate & 200 & m\({}^{3}\)/h & When the volume \% of fuel tank reaches 85\%, flow rate is adjusted from 500 to 200 m\({}^{3}\)/h \\ Ambient Temperature & 25 & \({}^{\circ}\)C & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Specification of bunkering pipelines. \begin{table}
\begin{tabular}{l c c c} \hline \hline
**Parameter** & **Value** & **Unit** & **Notes** \\ \hline Quantity of bunker tank & 2 & ea & \
\begin{tabular}{c} Bunkering ship has two independent \\ International Maritime Organization (IMO) \\ type C tanks \\ \end{tabular} \\ Net capacity of bunker tank, V\({}_{\text{net, bit}}\) & 3250 & m\({}^{3}\) &
\begin{tabular}{c} Total cargo capacity of bunkering ship is \\ 6500 m\({}^{3}\) in two bunker tanks \\ \end{tabular} \\ Overall length of each bunker tank & 30.74 & m & 2:1 ellipsoidal head, D/2h = 2, head height 3 m \\ Diameter of each bunker tank & 12 & m & Assumed based on Reference [22] \\ Surface area of each bunker tank, A\({}_{\text{bt}}\) & 932.5 & m\({}^{2}\) & Calculated from length and diameter \\ Maximum allowable relief valve setting, P\({}_{\text{bt- MARVS}}\) & 4 & bar & Assumed \\ Boil-off rate (Normal) & 0.25 & \% & Assumed \\ Thermal conductance of bunker tank, (UA)\({}_{\text{bt}}\) & 107.36 & W/K & Calculated from Equations (2) and (3) \\ Overall heat transfer coefficient of bunker tank, U\({}_{\text{bt}}\) & 0.414 & kJ/h-m\({}^{2}\)-K & Calculated from Equations (2)-(4) \\ Quantity of cargo pump & 2 & ea & There is a submerged electrical driven cargo \\  & & & pump in each bunker tank \\  & & & Three performance curves generated in Aspen \\ Cargo pump performance curves & - & - & HYSYS at efficiency of 70\%, 210 mlc and \\  & & & volumetric flow rate of 400 m\({}^{3}\)/h \\ Ambient Temperature & 25 & \({}^{\circ}\)C & \\
**Base case conditions at bunkering** & & & \\ LNG Volume \% & 80 & \% & \\ LNG temperature in bunker tank & -147 & \({}^{\circ}\)C & \\ Pressure in bunker tank & 2.94 & bar & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Specification and initial condition of LNG bunker tank in bunkering ship.