Untitled - Undip PAK Repository

(1)

(2)

(3)

Content from this work may be used under the terms of theCreative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Published under licence by IOP Publishing Ltd

The 5th International Conference on Marine Technology (SENTA 2020) IOP Conf. Series: Materials Science and Engineering 1052 (2021) 011001

IOP Publishing doi:10.1088/1757-899X/1052/1/011001

1

Preface of SENTA 2020 Proceedings

The International Conference on Marine Technology, which is more popular known as SENTA, is an annual conference organized by the Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember (ITS) Surabaya, Indonesia. Since 2001, the Faculty of Marine Technology – ITS has organized the annual SENTA conference, formerly known as Seminar Nasional Teknologi dan Aplikasi Kelautan (National Conference on Marine Technology and Application), which provided a regular forum for researchers and engineers in Marine Technology in Indonesia. Then in 2016, SENTA conference has turned into an international conference in order to expand its research network.

Due to the Covid-19 pandemic situation, The 5^th International Conference on Marine Technology (SENTA 2020) held virtually on 8 December 2020. All honourable authors contributed to the conference through submissions of their research papers on all topics related to “Transformation from Archipelagic into Maritime States for Prosperous Indonesia”, including, but not limited to: Naval Architecture, Ship Production and Material Technology, Marine Robotics and Digital Ship Technology, Marine and Safety Engineering, Marine Renewable Energy, Offshore and Coastal Engineering, Shipping, Port and Maritime Logistic, also Maritime Education Training. All of the authors presented their manuscript in two plenary sessions divided into eight rooms according to their topics through zoom platform. Each author delivered their presentation for about 12 minutes.

On behalf of SENTA committee, I would like to extend gratitude to all the authors who contribute to the submission of the result of their latest research. The committee of SENTA received 113 submissions. From those submissions, there were 78 papers that were presented in SENTA 2020. All the accepted paper has passed the criteria and has been reviewed by the reviewer and then the authors has revised it according to the reviews. 73 papers were accepted for publication. Also, I would like to express my grateful to the Technical Program Committee and the reviewers for their support in the reviewing process to keep the quality of manuscripts.

SENTA 2020 is a high quality conference with a competitive submission process. The committee received submissions from 9 countries, they are Indonesia, Japan, Malaysia, Nigeria, Saudi Arabia, South Korea, Sri Lanka, United Kingdom and United States. SENTA 2020 becomes a great opportunity for researchers, students and practitioners to participate in exchanging information and experiences to keep up to date the research, technology development and innovation related to maritime technology.

There are four prominent keynotes speakers to whom I would like to say thank for their support to SENTA 2020, they are:

1. Prof. Satryo Soemantri Brodjonegoro, President of Indonesia Academy of Science (AIPI), Indonesia

2. Prof. Mehmet Atlar, Professor Associate HOD Research & KE, University of Strathclyde, United Kingdom

3. Prof. Joem Kee-Paik, Professor of Safety Design and Engineering, Pusan National University, South Korea

4. Prof. Jason Monty, Head of Department of Mechanical Engineering, University of Melbourne, Australia

(4)

2

In addition, I sincerely appreciate Dr. Rafet Emek Kurt from University of Strathclyde - United Kingdom for SAFEMODE Project Presentation. SAFEMODE is a research project on the human factor element in marine and aviation safety. Conducted by more than 30 institutions worldwide and financed by Euro-Horizon 2020.

I would also appreciate the IOP conference publisher so that we could make an agreement to publish the SENTA proceeding to the IOP Conference Series: Materials Science and Engineering (MSE). We also would like to deliver the warmest greeting for our colleges, partnership universities, industry and government institutions.

Once again, thank you for your support, I wish that the aims of SENTA 2020 still can be achieved and gives great benefits for all authors though we could not conduct the conference as usual. I also hope that the SENTA 2020 proceeding can be useful for the readers in supporting their research related in marine technology as well as further contributing to develop the technology in the maritime field.

General Chair of SENTA 2020 Professor I Ketut Aria Pria Utama Faculty of Marine Technology

Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia December, 2020

(5)

3

Program Committees:

1. Dr. Eng. Trika Pitana 2. Dr. Eng. Rudi Waluyo 3. Wasis Dwi Aryawan, Ph.D.

4. Dr-ing. Setyo Nugroho 5. Herman Pratikno, Ph.D.

6. Benny Cahyono, Ph.D.

Organizing Committees 1. Prof. I Ketut Aria Pria Utama 2. Dr. Eng. Yuda Apri Hermawan 3. Dr. Eng. Dhimas Widhi Handani 4. Dr. Achmad Baidowi

5. Dr. Nurhadi Siswantoro

6. A.A. BGS. Dinariyana Dwi Putranta, Ph.D.

7. Dr. Dendy Satrio

8. Dr. Eng. M. Badrus Zaman 9. Sufian Imam Wahidi, M.Sc.

10. Triwilaswandio Wuruk Pribadi, M.Sc.

11. Sholikan Arif, M.T.

12. Febriani Rohma Dhana, M.T 13. Danu Utama, M.T.

14. Erzad Iskandar Putra, M.T.

15. Ardi Nugroho Yulianto, M.T.

16. Teguh Putranto, M.T.

17. Raditya Danu Riyanto, M.T.

18. Dini Adni Navastara, M.Sc.

19. Hasan Iqbal Nur, M.T.

List of reviewers:

1. Prof. Achmad Zubaydi 2. Prof. Eko Budi Djatmiko 3. Prof. Mukhtasor

4. Prof. Ketut Buda Artana 5. Prof. Heri Supomo 6. Prof. Aris Sulisetyono

7. Prof. Aguk Zuhdi M. Fathallah 8. Prof. Semin

9. Dr. Ketut Suastika 10. Dr. Made Ariana

11. Dr.Eng. I Gusti Ngurah Sumanta Buana 12. Suntoyo, Ph.D

13. Dr. Eng. Shade Rahmawati

(6)

4 14. Dr. Emmy Pratiwi

15. Sutopo Purwono Fitri, Ph.D.

16. Nur Syahroni, Ph.D.

17. Dr. Eng. Yeyes Mulyadi 18. R. Haryo Dwito A, Ph.D.

Organized by

Supported by

(7)

1/21/22, 8:32 AM IOP Conference Series: Materials Science and Engineering, Volume 1052, 2021 - IOPscience

https://iopscience.iop.org/issue/1757-899X/1052/1 1/12

Abstract. To determine the changes in the microstructure, impact strength, and hardness of the carbon steel medium type ST 60 with variations in temperature: quenching, tempering 200⁰C, tempering 400⁰C and tempering 600⁰C, then a heat treatment was given at 850⁰C for 30 minutes then quenched with brine solution with a salt content of 10% and continued with tempering for 30 minutes with variations in tempering temperature: 200⁰C, 400⁰C and 600⁰C. The chemical composition of the ST 60 steel specimen obtained that the main constituent elements are iron (Fe) = 98.1%, manganese (Mn) = 0.572%, silisium (Si) = 0.246%, and carbon (C) = 0.362%.

Meanwhile, the hardness, impact, and microstructure test results show that the quenching specimen has the hardest and softest material properties. This is indicated by the highest hardness value of 772.67 VHN and the smallest impact value of 1.24 J / mm². The martensite phase structure formed causes the material properties to be the hardest. In the 200⁰C tempering specimen the hardness began to decrease and the ductility increased as indicated by the hardness value of 625 VHN and the impact value of 2.02 J / mm². In this specimen, a tempered martensite phase was formed, which is softer than martensite. In the 400⁰C tempering specimen, the hardness value was getting smaller, but the ductility increased as indicated by the hardness value of 448.67 VHN and the impact value of 2.56 J / mm². The bainite phase structure with ductile / malleable properties was formed in this specimen. In the 600⁰C tempering specimen the properties of the resulting material were the most ductile and softest indicated by the lowest hardness value of 295 VHN and the highest impact value of 3.11 J / mm². The structure of the ferrite and fine pearlite phases with very soft properties was formed in this specimen.

Keywords : Quenching, Tempering, Martensite, Ferrite, Bainite, Pearlite

1. Introduction

The heat treatment process aims to obtain a metal that is hard, soft, ductile, and eliminates residual stress. Heat treatment is often referred to as a way to increase the hardness of the material, in fact it can also be used to change the properties of use or with certain interests for user needs, such as: increasing malleability, restoring elasticity after cold work. Even heat treatment not only changes the properties of the material, but is also able to increase the performance of the material by increasing the strength or certain characteristics of the material that has been heat treated (Beumer, 1985).

Through the tempering process, hardness and ductility can be reduced to meet the requirements of use.

If the hardness decreases, the tensile strength decreases while the ductility and toughness of the steel increase. The tempering process consists of reheating the hardened steel to below the critical

(14)

1

Heat Transfer Characteristics of Latent Heat Thermal Energy Storage for Floating Concentrate Solar Power Systems

M Shibahara¹ and T Hinoki²

1 Graduate School of Maritime Sciences, Kobe University, 5-1-1, Fukaeminami, Higashinada, Kobe, Hyogo, 658-0022, Japan

2 Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan

Abstract. The heat transfer characteristics of the latent heat thermal energy storage (LHTES) for floating concentrated solar power (CSP) systems were investigated experimentally and numerically. The understanding of natural convection heat transfer between the heat transfer fluid (HTF) and a tube bundle in the heat exchanger is important for the thermal design of the LHTES. As a primitive study, the analytical model of natural convection heat transfer was developed between the HTF and the tube bundle in the heat exchanger of LHTES. In this study, D-mannitol was used as the HTF for the LHTES. To simplify the tube bundle of the heat exchanger, a heated cylinder was installed in the liquid D-mannitol. In the experiment, the average temperature of the cylinder and the heat flux were measured, and the heat transfer coefficient under the natural convection was obtained. Meanwhile, the numerical analysis of natural convection heat transfer was conducted using the commercial computational fluid dynamics (CFD), PHOENICS. The temperature and velocity profiles around the heated cylinder were obtained in the numerical simulation. The heat transfer coefficient was compared with the author’s experimental data. The numerical result was in good agreement with the measured heat transfer coefficient.

1. Introduction

The technology of concentrated solar power (CSP) systems have been developed [1,2]. Diendorfer et al.

[3] proposed the floating offshore parabolic trough collector system. By applying the vertical collector system in the offshore area, the thermodynamic efficiency would increase due to the huge cooling seawater. Since their work was focused on the floating model and the optical performance as a function of time and location without the thermal energy storage (TES), the fundamental research of the TES was scarce for the CSP system.

The TES is categorized as sensible heat systems and latent heat systems [4]. In general, the molten salts are applied for the TES of CSP systems. Since the temperature of molten salts is high, it is difficult to operate the TES. For example, the rate of mixture is 40 wt.% of KNO3 to 60 wt.% of NaNO3 as solar salts. The temperature of solar salts is ranged from 563 K to 823 K. Since the waste heat recovery of the CSP is needed below the melting temperature of molten salts (approximately 511K), the latent heat system using phase change material (PCM) is considered [5].

The latent heat thermal energy storage (LHTES) using PCMs is also implemented in various waste heat resources such as power plants, EVs and marine transportations, and industrial applications. The PCM depends on the fusion temperature and latent heat. High-temperature PCMs are utilized as energy conservation technologies. PCMs can be categorized as alkali hydroxide, alkali nitrate, hydrate salt,

(15)

1

Impact of seabed slope on steel catenary riser touchdown zone response

A. M. Ogbeifun¹, S. Oterkus¹, J. Race¹, H. Naik², D. Moorthy³, S. Bhowmik², J.

Ingram³

1Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, G4 0LZ, UK.

2McDermott International, 40 Eastbourne Terrace, Paddington, London, W2 6LG, UK.

3McDermott International, 757 N. Eldridge Parkway, Houston, TX 77079, USA.

Abstract. Several factors can affect the response of steel catenary risers (SCR) around its touch down zone (TDZ). These include the stiffness of the soil, the soil suction force on the riser TDZ, the soil degradation with cyclic TDZ loading, etc. Riser strength and fatigue response computation are usually performed considering flat seabed and with the use of rigid or linear (spring) riser soil interaction model. However, bathymetric information obtained for the SCR lay path on the seabed reveal complex seabed profile variation, indicating that the seabed is far from being flat around the SCR TDZ. This paper presents findings from an investigation conducted on the influence of seabed slopes on the strength and fatigue response of SCRs, using a non- linear (NL) riser soil interaction model. The responses of SCRs on positively and negatively sloped seabed (rotated about the static touch down point on flat seabed) are compared with responses of SCRs on flat seabed. From the results, it can be deduced that the SCR dynamic and fatigue responses may be overpredicted or underpredicted in magnitudes dependent on the slope deviation of actual seabed from a flat seabed.

1. Introduction

Steel catenary risers are the most attractive riser solution because of their simplicity and robustness in application [1]. A major challenge with SCR application is the high stress and fatigue damage incurred around its critical sections, which are the hang off (HO) and the TDZ, shown in Figure 1. Prediction of SCR stress and fatigue response around the TDZ was in the early history of SCR design performed using a rigid soil model. This approach was then progressively improved by the development and implementation of linear (spring) soil-riser interaction models. More recently, considerable efforts have been made to improve the SCR TDZ interaction model by the development of the non-linear models [2- 4]. The NL riser soil interaction model provides a more realistic approach for evaluating riser response interactions with the seabed.

It is a common practice during the design of SCR to assume a flat seabed [5]. Realistically, seabed can hardly be flat. Bathymetric data reveal complexities in the topography of the seabed and the variation of the seabed profiles along riser azimuth. Sloped seabed, especially in the immediate region surrounding TDZ, may impact SCR configurations calculated based on the flat seabed assumption, leading to SCR TDP mismatch [6]. The mismatch is the distance between the SCR TDP on an assumed flat seabed and the SCR TDP on realistic sloped seabed. This work investigates the influence of seabed

(16)

1

Improved PID Controller for DC Motor Control

Mohammed Ahmed¹, Nura Musa Tahir², Aminu Yahaya Zimit³, Musa Idi², Kamal Abubakar Abubakar⁴, Salihu Abdulmumini Jalo⁵

1Department of Electrical and Electronics Engineering, Abubakar Tafawa Balewa University, P. M. B. 0248 Bauchi, Nigeria.

2Department of Mechatronics and System Engineering, Abubakar Tafawa Balewa University, P. M. B. 0248 Bauchi, Nigeria.

3University of Hafr Albatin Housing, Saudi Arabia.

4Department of Electrical and Electronics Engineering, Nigerian Army University, Biu, Nigeria.

5Department of Electrical and Electronics Engineering, Adamawa State Polytechnic Yola, Nigeria.

[email protected]

Abstract. Presented is an improved version of the PID controller (PIDC) for DC motor control.

The PIDC is a very cheap and easy controller to implement and is currently in use in many systems. There are instances whereby higher precision is required and an improved version of the PID can serve. The systems might not be necessary limited to marine systems. Hence, saving the need for more costly redesign. The PIDC proposed was compared with the PID. Results show that the PIDC has superior performance compared to the PID. Hence, it is an indication that the PID could still withstand future developments; that is maintaining its characteristics of simplicity and cheapness.

1. Introduction

Electric motors have a wide range of applications as results of remarkable improvements in technology.

Some the areas include positioning in large telescopic antennas, tracking of radar systems, aircraft systems actuators, marine systems actuators and robotic systems [1-3]. Achieving desired objectives sometimes only require simple and cheap designs.

Rubaai and Kotaru [4] and Benard [5] explored the artificial neural networks for direct current (DC) motor control. In the works of Hameed and Mohamed [6], the fuzzy logic control technique was combined with the artificial neural network counterpart was applied. The fuzzy logic technique was investigated by Sadiq et al in their studies [7-9]. Rajesekhar et al. [10, 11], utilised the fractional-order proportional integral derivative (PID) along with the artificial bee colony algorithm in their works. In the studies conducted by Mishra et al., the proportional-integral (PI) control method was harnessed for motor control. The PID control methods have the advantage of simplicity, easy implantation and also a lot was known about it. Despite all these, some systems require better performance which cannot be attained with the ordinary PID control scheme. Hence, the need enhanced version of the PID [12]. The study was on exploring the reaching law for enhancing the PID controller performance which is referred to as the PIDC for the armature controlled direct current (DC) motors.

(17)

1

Automated door with face recognition: using artificial neural network approach

A Bashir¹, N M Tahir¹, A Y Zimit², U I Bature^3,4, K A Abubakar⁵ and A Y Nasir³

1Department of Mechatronics and System Engineering Abubakar Tafawa Balewa University Bauchi, Nigeria

2University of Hafr Albatin, 39524 Hafar Al Batin City, Saudi Arabia.

3Department of Computer and Communications Engineering, Abubakar Tafawa Balewa University Bauchi, Nigeria.

4Department of Electrical and Electronic Engineering, Universiti Teknologi Petronas, Malaysia.

5Department of Materials & Metallurgical Engineering, Nigerian Army University Biu, Borno, Nigeria.

[email protected], [email protected]

Abstract. The implementation of an accurate face recognition system in a hardware device is a very important aspect of various security applications. In a security system, any type of password is used to access private and confidential data, some are hard to remember and can be stolen or guessed, misplaced, forgotten, purloined or duplicated, or become corrupted and unreadable. While there have been significant improvements in the algorithms with increasing recognition accuracy, only a few types of research were conducted on implementing these face recognitions in hardware devices. Door access control systems based on face recognition is geared towards simplifying much-difficult face recognition problems in uncontrolled environments. This report comprised mainly of three sub-phases: face detection, face recognition, and automatic door access control. The face is detected by using the Viola-Jones method and face recognition is implemented by using the Principal Component Analysis (PCA). If a face is recognized, it is known, else it is unknown. The door will open automatically for the known person due to the command of the microcontroller (Atmega328P) received from the MATLAB program. On the other hand, the alarm will ring for an unknown person.

1. Introduction

Security is an aspect that is given top priority by organizations, educational institutions, political and government in personal identity and forgery issues [1], also the demand for going smart is continuously increasing [2]. Although the risk and security issues concern related to this category of systems may be enormous, the inclusion of a more general model of privacy and security in the design phase will reduce a lot of risks that are classified as moderate [3]. Monitoring door entrance is a vital issue, considering it as the only means of structure access. So, an efficient and precise door security system is vital to secure our assets and properties. Nowadays, manual or traditional methods of things are evolving to smart access control. Therefore, there is a need to change our traditional methods of accessing things to modernize methods of smart connectivity, this will provide enhance security and eliminate the existing drawbacks. Security separate access and threats, access control constitute three main components; identification, authentication, and authorization, thus there is a need to actualize this component on door system for better security and control [4-6]. Traditional door access requires keys, and existing ones requires a password using the keypad, pattern, card, or identification ID [7].

Untitled - Undip PAK Repository

Table of contents

Preface

Papers

Volume 1052 2021

The effect of low tempering, medium tempering, and high tempering heating temperature variations in the type of

medium carbon steel ST 60 on microstructure, hardness, and toughness.

Heat Transfer Characteristics of Latent Heat Thermal Energy Storage for Floating Concentrate Solar Power Systems

Impact of seabed slope on steel catenary riser touchdown zone response

Improved PID Controller for DC Motor Control

Automated door with face recognition: using artificial neural network approach