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Welcome back to LNG4U.
Another heavy week for LNG. China took most of the LNG carrier orders in October, Hormuz kept ships and cargoes on edge, and Egypt's LNG bill jumped 185% in a single month.
This week I also have something of my own for you. I went inside a foundry in Canada that makes parts for LNG cargo pumps, and the video is waiting for you below, with two job openings for cadets and for tanker officers moving to LNG. Here is what happened across the industry.
🎓 LNGKnowledge
Cooling down the cargo tanks before loading
Before an LNG carrier can load, her tanks must be cold. Here's how we cool down a membrane ship after gassing up. ❄️
1️⃣ The terminal sends LNG to the ship, and we spray it into each tank through the spray rails at the top, at 2 bar at the ship's rail.
2️⃣ The LNG flashes into cold vapour at the nozzles and cools the tank from the top down.
3️⃣ We control the spray so the vapour temperature drops about 20°C per hour for the first 5 hours, then 10 to 15°C per hour. Going faster stresses the pump tower and overloads the HD compressors and the nitrogen system.
4️⃣ The extra vapour goes back to the terminal through the HD compressors and the vapour line.
Cooldown is complete when the average tank temperature, without the two top sensors, reaches −130°C. From +40°C, it takes about 10 hours and around 800 m³ of LNG.
How long did your last cooldown take? Hit reply and tell me.
Source: LNG School
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