scholarly journals Analysis for use coastguard Offshore Platforms or SWATH Patrol Vessels in the Colombian Pacific Ocean

2021 ◽  
Vol 14 (28) ◽  
pp. 19-30
Author(s):  
Miguel Calvache Ramírez ◽  
Oscar Raúl García Baquero
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Parametric Design ◽  
Coast Guard ◽  
Cost Ratio ◽  
Offshore Platforms ◽  
Sea Floor ◽  
Efficiency Cost ◽  
Seizure Rate ◽  
Colombian Pacific

The average cocaine seizure rate of coast guard operations in the Colombian Pacific can be improved. To enhance this indicator, detection and interdiction must be improved. Therefore, the option of using an offshore platform with better detection means, and several Rapid Reasponse Units (RRUs) stationed offshore, is being analyzed. As a result, offshore platforms are neither feasible nor viable due to the depth of the sea floor (> 2 km), but SWATH platforms can be used. The parametric design of two SWATHs is performed and an operational evaluation is made of the different current units and SWATHs. The operational evaluation of the different current units and the proposed SWATHs is carried out and contrasted with their acquisition and life cycle cost, showing that the SWATHs have a better efficiency/cost ratio. Therefore, they can be considered as an alternative to improve the efficiency of cocaine seizures and other coast guard operations.

scholarly journals General Concerns Life-Cycle Design of Economical Ice-Resistant Structures in the Bohai Sea

2017 ◽  
Vol 24 (s2) ◽  
pp. 164-171
Author(s):  
Da-yong Zhang ◽  
Song-song Yu ◽  
Qian-jin Yue
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Design Theory ◽  
Bohai Sea ◽  
Cost Effective ◽  
Bohai Bay ◽  
Offshore Platforms ◽  
The Bohai Sea ◽  
Life Cycle Design ◽  
Whole Life Cycle

Abstract In China, the oil and natural gas resources of Bohai Bay are mainly marginal oil fields. It is necessary to build both iceresistant and economical offshore platforms. However, there are many risks during the life cycle of offshore platforms due to the imperfect preliminary design for the Bohai Sea economical ice-resistant structures. As a result, the whole life-cycle design should be considered, including plan, design, construction, management and maintenance design. Based on the demand of existing codes and research of the basic design, structural ice-resistant performance and the reasonable management and maintenance, the life-cycle design theory is discussed. It was concluded that the life-cycle cost-effective optimum design proposed will lead to a minimum risk.

scholarly journals Analysis of alternative selection for vertical clearance design under Tabalong Bridge of PT Adaro Indonesia

2022 ◽  
Vol 4 (1) ◽  
pp. 7-30
Author(s):  
Diean Oktavian Regar ◽  
Aqli Mursadin
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Secondary Data ◽  
Primary Data ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Bcr Method ◽  
Benefit Cost ◽  
National Road ◽  
Alternative Designs

PT Adaro Indonesia is trying to adjust a vertical clearance under Tabalong Bridge 1 (unloaded) and Tabalong Bridge 2 (loaded) because the existing conditions still apply a minimum vertical clearance of 4 m. I t should be in accordance with latest Regulation of the Minister of Public Works No. 19/PRT/M/2011 that for vertical clearance above national road at least 5.1 m. This specification has not been met by the national road under the Tabalong 1 & 2 Bridges bec ause both bridges were built in the 90s. Therefore we need an engineering technique to overcome this. There are 2 alternative designs, namely lowering the elevation of the national road and increasing the elevation of the bridge's upper structure to mitiga te oversized vehicles so as not to hit the lower structure of the Tabalong bridge. In determining the selection of the best alternative designs in this research is based on two (2) things, non financial criteria with Analytical Hierarchy Process (AHP) and financial criteria with Life Cycle Cost Analysis (LCCA)/Benefit Cost Ratio (BCR) method. This study uses a survey method by distributing questionnaires and interviews as a means of collecting primary data. In addition, previous research and consultant DED documents were used as a means of collecting secondary data. The AHP method is used to process primary data to produce a decision from a non financial aspect. While the LCC/BCR method is used to process secondary data to produce a decision from the financi al aspect . The results of the AHP analysis obtained that the synthesis value of the decision the option of lowering national roads was 85% and the bridge lifting option was 15% and the consistency ratio (CR) was 0.05 < 0.1. The consistency ratio below 0.1 shows that the questionnaire data from the respondents are consistent. The results of the analysis of Life Cycle Cost (LCC) obtained the option of lowering national roads where the LCC value is Rp. 44,877,651,669.27 more economical than the bridge lifting option. Then the results of the Benefit Cost Ratio (BCR) analysis obtained the option of lowering national roads with a BCR value of 2.33 > 1 and NPV = Rp. 43,442,264,804.34 > 1 means that the option lowering national roads is feasible. While the bridge li fting option is obtained by analyzing the value of BCR = 0.98 < 1 and NPV = option is not feasible to implement.

Minimum life-cycle cost design of ice-resistant offshore platforms

2009 ◽  
Vol 31 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Gang Li ◽  
Da-Yong Zhang ◽  
Qian-Jin Yue
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Offshore Platforms

scholarly journals SELECTION OF ALTERNATIVE ENERGY SOURCES INDONESIAN WARSHIP PATROL CRAFT 36 CLASS USING LIFE CYCLE COST (LCC) AND TOPSIS (TECHNIQUE FOR ORDER PREFERENCE BY SIMILARITY TO IDEAL SOLUTION)

JOURNAL ASRO ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 52
Author(s):  
Ahmadi Ahmadi ◽  
Haryanto Wibowo ◽  
Okol S Suharyo
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Alternative Energy ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Alternative Energy Sources ◽  
Order Preference ◽  
Topsis Technique ◽  
Benefit Cost ◽  
Selection Of

ABSTRACT Indonesia has abundant natural resources of oil and gas energy. Domestic fuel supply is not entirely fulfilled by domestic oil refineries, almost 20% -30% of domestic oil demand must be imported from abroad. This has an impact on the Navy. Steps to address this problem through switching to the use of alternative energy fuels for the Indonesian warship class Patrol Craft 36. The selection of appropriate alternatives requires analysis of information and identification of alternative fuel requirements to be selected. The approach in this study uses Life Cycle Cost method to see the life cycle cost of alternative and combined TOPSIS (Technique For Order Preference By Similarity To Ideal Solution) approach to other than cost factor, and Benefit Cost Ratio. The result of data processing of alternative energy sources selected is gas, CNG (Compressed Natural Gas) with the value of Benefit Cost Ratio 53,7051 Life Cycle Cost IDR 14,168,302,864.  Keywords: Alternative Energy, Life Cycle Cost, TOPSIS.

Life-Cycle Cost-Effective Optimum Design of Ice-Resistant Offshore Platforms

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Gang Li ◽  
Dayong Zhang ◽  
Qianjin Yue
Keyword(s):  
Life Cycle ◽  
Optimum Design ◽  
Life Cycle Cost ◽  
Failure Modes ◽  
Cost Effective ◽  
Design Model ◽  
Cost Evaluation ◽  
Bohai Bay ◽  
Offshore Platforms ◽  
Dynamic Reliability

In China, the oil and natural gas resources in Bohai Bay are mainly marginal oil fields, which freeze in the winter. It is necessary to build both ice-resistant and economical offshore platforms. However, risk is involved in the design, construction, utilization, and maintenance of offshore platforms as uncertain events may occur within the life-cycle of a platform. In this paper, the optimum design model of the expected life-cycle cost for ice-resistant platforms based on the cost-effectiveness criterion is proposed. Multiple performance demands of the structure, facilities and crew members, associated with the failure assessment criteria and evaluation functions of costs of construction, consequences of structural failure modes including damage, revenue loss, death, and injury, as well as discounting cost over time are considered. Different reliability analysis approaches involved in life-cycle cost evaluation, such as the global reliability under the extreme ice load, the dynamic reliability, and fatigue life induced by ice vibration, are studied. The proposed life-cycle optimum design formulas are applied to a typical ice-resistant platform in Bohai Bay, and the results demonstrate that the life-cycle cost-effective optimum design model is more rational compared with the conventional static design and the optimum dynamic design.

A Sensitivity Study of RAP Cost and Performance on its Life Cycle Benefits

2013 ◽  
Vol 723 ◽  
pp. 567-574 ◽  
Author(s):  
Chia Pei Chou ◽  
Ning Lee
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Life Cycle Cost ◽  
Sensitivity Study ◽  
Cost Ratio ◽  
Environmental Benefit ◽  
Emission Data ◽  
Carbon Reduction ◽  
Financial Perspective ◽  
And Performance

This study inspects the benefits of using RAP on both financial and environmental aspects from life cycle viewpoints. The Life Cycle Cost Saving (LCCS) and the Life Cycle Carbon Reduction (LCCR) of various RAP mixtures (RAP content 10%, 20%, 30%, and 40%) to the virgin mixture are introduced and applied in this study. Carbon emission data of associated materials are obtained from PaLATE database. According to calculations, the RAP mixtures corresponding cost ratio and service life ratio exceed certain thresholds to have advantages over virgin mixtures. From a financial perspective, the service life ratio of RAP mixtures to virgin mixtures must be larger than the cost ratio of these two materials. For environmental benefit, the service life of RAP mixtures must be over 70% (40% RAP) to 90% (10% RAP) of that of the virgin mixture.

Development of a Model for the Optimal Determination of the Deck Elevation of Offshore Platforms

2006 ◽  
Author(s):  
Cesar Ortega ◽  
Dante Campos ◽  
Alberto Soriano ◽  
Jorge Alamilla ◽  
Juan de Dios de la O. Ramirez
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Cost Benefit ◽  
Life Cycle Costs ◽  
Wave Forces ◽  
Offshore Platforms ◽  
Expected Cost ◽  
Wave Heights ◽  
The Cost

In the present paper, a reliability-based cost-benefit model for the optimal determination of the deck elevation for new offshore platforms is proposed. The assessment of the benefit of reduced risks and the costs of increasing the deck elevation are weighed. If the deck elevation is increased, the risk associated with the wave forces on deck is reduced, because is less the probability of wave forces on deck; however the significant cost of increasing the deck elevation is magnified by the cost of mobilization of equipment in the life of platform, it cost is increased because boats with more capacity are required (in general, the rent is more expensive). For the propose of assessment the risk associated with the wave forces on deck a probabilistic model for the future maximum wave heights under the platform is studied taking in account the location of the platform. In addition, the expected cost of mobilization of equipment and the expected cost of maintenance of the structure and equipment after of the hurricanes futures are estimated, and then the expected life-cycle cost of the platform is determined. One example of application is proposed, where several elevations for the deck are studied and their corresponding life-cycle costs are estimated. The optimal deck elevation is chosen so that the expected life-cycle cost is minimized.

scholarly journals Kajian Ekonomi Rencana PLTMH di Desa Panji

2020 ◽  
Vol 19 (2) ◽  
pp. 263
Author(s):  
Richard Antony Suatan ◽  
Ida Ayu Dwi Giriantari ◽  
I Wayan Sukerayasa
Keyword(s):  
Life Cycle ◽  
Cash Flow ◽  
Life Cycle Cost ◽  
Net Present Value ◽  
Payback Period ◽  
Rate Of Return ◽  
Cost Ratio ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Break Even Point

Pembangkit listrik tenaga mikrohidro (PLTMH) di Banjar Dinas Mekar Sari, telah dibangun oleh kelompok masyarakat secara swadaya pada tahun 1980. Dengan penggunaan teknologi yang tradisional mengakibatkan efisiensi PLTMH rendah, sehingga perlu dilakukan perencanaan ulang bagi PLTMH Banjar Dinas Mekar Sari agar dapat beroperasi lebih optimal. Salah satu faktor yang sangat penting dalam perencanaan yaitu faktor finansial/ekonomi. Faktor ini akan digunakan untuk menilai suatu perencanaan apakah layak dibangun atau tidak. Parameter yang digunakan dalam menentukan faktor ekonomi yaitu Net Present Value (NPV, Internal Rate of Return (IRR), Benefit to Cost Ratio (BCR), Life Cycle Cost (LCC), dan Break Even Point (BEP). Telah dilakukan analisis kelayakan ekonomi untuk perencanaan PLTMH Banjar Dinas Mekar Sari diperoleh, BCR sebesar 1,05 dan 0.79 serta nilai NPV sebesar Rp3.320.076.318 dan Rp2.520.526.334 bernilai positif, dan besarnya nilai IRR 13% dan 11% melebihi tingkat Expected Annual Rate of Return Indonesia yang sebesar 11,4%. Serta besarnya BEP unit yang harus dijual untuk mencapai titik cash flow bernilai Rp.0 sebesar 3.783.633.30 kWh, dan besarnya payback period pada proyek ini yaitu 5 tahun 3 bulan. Jadi dilihat dari parameter ekonomi yang ada maka perancangan PLTMH di Banjar Dinas Mekar Sari layak dari segi parameter ekonomi.

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