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Design of Shell and Tube Heat Exchanger

It’s been quite a long time since the last time I saw and designed shell and tube heat exchanger. Recently, I got opportunity to dig and refresh knowledge that type of heat exchanger. In this post, I want to share you about design of shell and tube heat exchanger.

This figure shows you general step-by-step method of design of shell and tube heat exchanger.

Design of shell and tube heat exchanger
Design of shell and tube heat exchanger

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Application Range of Variety of Compressors and Compressor Selection

When I was involved in pre-FEED of well production and gas treatment, one of key deliverable is compressor studyIn this post, I want to share you about application range of variety of compressors (reciprocating, compressor, and axial-flow). In addition, I will also share the differences between those compressors.

Application Range of Variety of Compressors

Figure below can estimate application range of variety of compressors. It is a function of inlet flow in actual cubic feet per minute and discharge pressure in psia. 

Application range of variety of compressors
Application range of variety of compressors (source: Rules of Thumb of Chemical Engineers, Branan)

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Quantitative Risk Analysis Techniques Part 3 – Risk Results and Risk Mitigation

In the first part of quantitative risk analysis techniques, we learnt about crucial step of the analysis which are hazard identification and cause and frequency analysis. In second part, we learnt continuation of the first part, which are fault tree analysis or event tree analysis as an approach to estimate frequency. After that we learnt about consequence modeling and several potential consequences.

In this post we will learn about risk results and risk reduction and mitigation.

Risk Results

There are two graphic forms that are usually used to present risk result: individual risk contours and societal risk F-N curves (Frequency-Number of fatalities).

Individual risk is the risk to a person in the vicinity of a hazard. This includes nature of the injury to the individual, likelihood of injury occurring, and time period of injury occur.

Societal risk is a measure of risk to a group of people. It is mostly expressed as frequency distribution of multiple casualty events. (more…)

I Participated in Lokakarya Sertifikasi Insinyur Profesional LSIP

Yesterday I participated in “Lokakarya Sertifikasi Insinyur Profesional LSIP” or Professional Engineers Certification Workshop held by “Persatuan Insinyur Indonesia” (Indonesian Engineers Association) in Jakarta. It was very awesome experience and I will tell you why.

At the beginning my motivation behind participating in this workshop was simply to get certified as professional engineer. Maybe if I get certificate, it will add value to myself. After I participated the workshop, being professional engineer is more than that. Being professional means to always work safely, to continuously improve oneself, and to contribute to the society. I am sure there are more than that, but those three points are what I remembered.

What did I get in Lokakarya Sertifikasi Insinyur Profesional LSIP?

In this lokakarya I got explanation about:

  • Indonesian Law no 11/2014 about engineering
  • Organization structure of Persatuan Insinyur Indonesia (Indonesian Engineers Association)
  • Engineer ethics code
  • Professional engineer application form – how to fill the application

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Quantitative Risk Analysis Techniques Part 2

In previous post, quantitative risk analysis techniques is started with hazard identification then frequency analysis. Frequency itself can be estimated by two approaches, which are generic data approach and modeling approach. The first approach is already described in previous post.

Modeling approach is used to estimate leak frequency when general statistics data is not available. Modeling approach use fault tree analysis or event tree analysis

Fault Tree Analysis (FTA)

Fault Tree Analysis provide estimated frequency/likelihood of even for events that have never occurred by combining all possible basic failure mode (collision, dropped object, human error). These modes are combined and we tract how these initiating events can propagate to the top event by progressive failures of safeguard or by combining with other events. We use AND or OR gate. (more…)