Last weekend, me, my mother, my little sister, and my cousin went to my late grandfather’s house. It was located in Ciherang Village, Cianjur Regency. Honestly, this was my first experience going there. Since I was little, I had no chance to go there. Read More
LNG Recirculation Requirement
In LNG receiving terminal, where LNG is pumped from LNG carrier to onshore LNG storage tank, we have to provide one line to intermittently circulate LNG through unloading lines. This is called LNG recirculation line or keep-cool line. The function of this line is maintain cryogenic condition of the unloading line during holding mode. Unloading activity is conducting intermittently. Sometimes we need to wait for a week or even a month to the next LNG unloading. During this time, there is a possibility of increasing temperature in the line. To prevent that, we need to circulate LNG in unloading line. Read More
Boil-off Gas Sources
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. Read More
Typical Process Diagram for Small LNG Regasification (Part 2)
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. Read More
Typical Process Diagram for Small LNG Regasification (Part 1)
Today I want to share you Typical Process Diagram for Small LNG Regasification. For your information, small LNG regasification is very useful to be built in remote location where power supply is very limited.
Typically main equipments installed in Small LNG Regasification are unloading facility, LNG storage tank, LNG pump, natural draft ambient air vaporizer, and metering system. Read More
My Current Project: All LNG!
Since the end of November 2015, my project was about LNG. Now, I also work with LNG. Totally my project related to LNG was three projects. Do you think that’s quite awesome?
I have done two LNG regasification project for power plant. Currently, I’m working on LNG terminal project and LCNG/LNG station. My first LNG project was very challenging. Not only because that was my first LNG project, but also the degree of difficulty and total regasification location. The first project involved 21 locations in Central Region of Indonesia. So, it was very tiring project. Read More
Sizing of Compressor and Instrument Air Capacity
I want to share you how to size or select minimum capacity of air compressor and instrument air dryer. Air compressor is usually used as feed air for:
- Instrument air (for instrumentation or feed air for nitrogen generator)
- Utility air (for utility station)
Instrument Air Requirement for Instrumentation
Instrument air is required in operation of control valve and shut down valve. The rules below is used to calculated instrument air requirement for instrumentation:
- Control valve (CV) – steady state condition: 1 scfm/valve
- Control valve (CV) – transient condition: 6.25 scfm/valve
- Shut down valve (SDV) – steady state condition: 0
- Shut down valve (SDV) – transient condition: 4.8 scfm/valve
7 Steps of Chemical Process Quantitative Risk Assessment
Currently I’m working on Quantitative Risk Assessment Study for CNG Filling Station. We already worked on Hazard Identification, therefore it’s quite easy for us to choose the most significant hazard scenario for that risk assessment.
I found several reports regarding Quantitative Risk Assessment in Chemical Process Industries, especially in CNG Filling Station, for example QRA report conducted by DNV (Det Norske Veritas) for Mahanagar Gas.
Guidelines for Chemical Process Quantitative Risk Assessment (CPQRA) from American Institute for Chemical Engineers provides a quantitative method to evaluate risk and identify areas for cost-effective risk reduction
I just finished to summarized Seven Steps of CPQRA extracted from the guidelines. Hopefully this summary is useful for you to learn the basics of quantitative risk assessment in chemical process industries.
Download pdf version : Steps of QRA rev.
Wunderlist: Powerful To-Do List Program
This time I will not write about chemical engineering, how to do calculation, and so on.. but I want to share about to-do list program I have used since yesterday.
For several times, I used Microsoft Office OneNote to create to-do list. It is very simple and nice. Every time I start my day at work, I open it and see what to do today. I found creating to-do list helped me focus.
Yesterday I had an idea to find other to-do list program and tried it. Then I found to-do ist! I saw to-do ist is very nice, clean, and simple. I downloaded it but it took a very long time to synchronize. But, I can use it online on website. In the end, I uninstalled the program and tried another one: Wunderlist. Read More
Mini Oil Refinery Review
Mini Oil Refinery is usually built with capacity of 4000-30 000 barrel oil per day. It is built to fulfill oil demand in remote region where access to energy is difficult. Mini oil refinery is usually build in form of modular because of low capital cost and ease and speed of construction.
In Indonesia, demand of petroleum products such as gasoline, naphta, kerosene, gas oil, heavy fuel, fuel oil, and LPG is projected to increased in 2015. The existing oil refinery cannot fulfill the demand. There is a gap between petroleum products supply and demand. Therefore more mini oil refinery need to be developed. Read More