Samsung Heavy Industries (SHI), in collaboration with GTT, has developed a revolutionary three-tank GTT concept for Liquefied Natural Gas (LNG) carriers. This design marks a significant departure from the industry-standard four-tank configuration, aiming to redefine sustainability, efficiency, and operational flexibility in maritime LNG transport. Driven by stringent environmental regulations, particularly those from the International Maritime Organization (IMO) targeting a 50% cut in GHG emissions by 2050 (relative to 2008 levels), the three-tank concept integrates structural optimization, advanced hydrodynamic performance, and cutting-edge digital technologies. Key innovations include enhanced cargo capacity within optimized dimensions, superior fuel efficiency through dual-fuel propulsion and energy-saving devices (ESDs), robust safety features, and future-proofing for zero-carbon fuels like ammonia and hydrogen. The design promises significant reductions in CO₂, NOₓ, and SOₓ emissions, improved Energy Efficiency Design Index (EEDI) and Carbon Intensity Indicator (CII) ratings, and a compelling lifecycle economic model driven by reduced operational expenditure (OPEX).

In this episode, we discuss the emergency cargo pump, a critical piece of equipment used when a vessel's main cargo pumps fail. We cover the pump's installation, operation, and the importance of adhering to strict safety and operational procedures to prevent equipment damage and ensure personnel safety.

Our discussion walks through the entire process of deploying the emergency cargo pump, from its storage and transportation to installation in a cargo tank. We detail the necessary pre-operation checks, including the crucial 10-hour gas cooling period and the subsequent one-hour liquid submersion for thermal stabilization. We also explore the pump's operational parameters, safety features, and the specific steps for starting and stopping the pump, both in normal and emergency situations.

• The emergency cargo pump is a submerged motor pump cooled and lubricated by the LNG it pumps.
• Proper installation involves purging the pump well with nitrogen, careful handling of power cables, and the use of a portable air winch and davit.
• A critical pre-operation step is the 10-hour gas cool-down followed by a one-hour liquid submersion to ensure thermal stabilization and prevent pump damage.
• The pump must not be started against a closed discharge valve to avoid insufficient cooling, lubrication issues, and excessive vibration.
• Safety features include low discharge pressure switches, undercurrent and overcurrent relays, and automatic shutdown in case of ESD activation or other critical faults.
• The pump has specific restart limitations to prevent damage, with different protocols for normal and emergency restarts.
• Operating the pump outside its specified capacity range of 196m³/h to 550m³/h can lead to damage and reduced performance.
• Actionable advice includes the importance of using lanyards for tools when working near open pump columns and ensuring all personnel are familiar with the pump's operation and safety procedures.

This is comprehensive guide for maritime engineers and crew members on the operation and maintenance of stripping and spray pumps found on LNG carriers. The episode emphasizes the critical importance of these specialized pumps for tasks like tank cooldown and stripping, highlighting that their proper functioning is essential for vessel safety and operational efficiency. It moves from foundational knowledge and operational procedures to safety systems, troubleshooting common issues, and advanced optimization strategies, stressing a proactive approach to maintenance and continuous learning. The guide provides step-by-step methodologies, checklists, and key performance indicators (KPIs), ultimately aiming to equip mariners with the confidence and expertise needed to manage these systems effectively, drawing heavily on manufacturer specifications and industry benchmarks.