Today I bought a toothpaste from GlaxoSmithKline and got interested in its composition. I actually gained interest in reading composition of various things, but never answered what their functions. In this post I want to share you what I googled about the function of every component in toothpaste. Each toothpaste may have different toothpaste composition. I used this toothpaste brand for example. Please note, this post is not meant to encourage you to buy the product :D. (more…)
In this post, I want to share you typical LNG tank instrumentation. This post is related to my old post: rollover in LNG storage tank. As explained previously, rollover in LNG storage tank begins with stratification which is LNG layer formation due to density differences. To monitor stratification, good and necessary instrumentation should be installed thus prevents rollover. (more…)
In this post, we use vacuum insulated type LNG storage tank when we don’t want to deal with boil-off gas handling. The storage tank have design pressure as high as 6-10 barg. When we store LNG in the LNG, boil-off gas will be generated due to heat leak to tank. Increasing temperature of LNG will increase total volume of LNG and vapor in the tank, thus increasing its pressure.
This phenomena leads to a simple question, “How long can LNG storage tank keep the vapor before PSV works?” (more…)
British Standard European Norm (BS EN) 1160 – Installations and Equipment for Liquefied Natural Gas – General Characteristics of Liquefied Natural gas defined physical properties of boil-off gas. (more…)
As mentioned in part 1, small LNG regasification facility typically consists of LNG unloading facility (which can be flexible hose or marine loading arm), LNG storage tank, LNG sendout pump, ambient air vaporizer, and metering. In part 1 we already discussed about LNG unloading facility and LNG storage tank. In this part I want to share the rest of them.
LNG Sendout Pump
LNG sendout pump is used to increase pressure of LNG before being sent to vaporizer. In LNG facility, there are two most common type of pump: submerged centrifugal pump and reciprocating pump.
Submerged centrifugal pump is used when LNG flowrate is high but the pressure in low to medium. Meanwhile reciprocating pump is used when the flow is low but the pressure is high. (more…)