Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Structural Arrangement of End Flash System for LNG Production

Chia, Boon Chung (2013) Structural Arrangement of End Flash System for LNG Production. Universiti Teknologi PETRONAS. (Unpublished)

[img] PDF
Download (1138Kb)


End flash system is important in LNG Chain as it increases LNG throughput by reducing the cooling load in Main Cryogenic Heat Exchanger (MCHE). One of the main problems encountered in industrial installations of end flash system is related in particular to the optimum use of the compression apparatus which represents a significant investment, both in terms of initial purchase and in terms of power consumption. The energy needed for the typical end flash system is approximately 995 kJ for the production of 1 kg of LNG. In this work, simulations on the structural arrangement of end flash system were conducted in the aim of reducing the specific power of production of LNG. The energy required to produce 1 kg of LNG and machinery power consumed by the end flash system are investigated. Two optimization cases, namely pure refrigerant cascade and mixed refrigerant cascade, have been studied and analyzed from technical and economical aspect. Results show that the base case needs 351 kJ to produce 1 kg of LNG while the mixed refrigerant cascade consumes only 273 kJ for the same purpose. Besides that, mixed refrigerant cascade gives higher LNG rundown at 542 t/h compared to the base case which gives only 540 t/h of LNG. In terms of economic analysis, the additional LNG rundown yields additional revenue of USD 13.6 million. The profitability analysis of installation of mixed refrigerant cascade over the base case shows positive feedback as ROI is 20.7% and IRR is 17.8% which is higher than the MARR. The study develops a new process which allows significant increase in LNG production with lower energy consumption as compared to the current end flash system.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Process System Engineering
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 09 Oct 2013 11:07
Last Modified: 09 Oct 2013 11:07
URI: http://utpedia.utp.edu.my/id/eprint/8422

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...