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1
Surono, Arif, Sudiro Sudiro, Wachid Yahya, Onery Andi Saputra, and Sunaryo Sunaryo. "PELATIHAN PERBAIKAN AC MOBIL BAGI KARANG TARUNA PANJI PUSPA DI DESA GUMPANG KECAMATAN KARTASURA MENUJU USAHA MANDIRI." Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ 10, no. 1 (January 31, 2023): 39–43. http://dx.doi.org/10.32699/ppkm.v10i1.2274.
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This paper reports on community service activities carried out by the Politechnic Indonusa of Surakarta team foreign exchange reserves. Devotion is focused on the members of the cadet reef who have graduated from school that aim to provide knowledge and skill regarding repairs and maintenance of air conditioning (ac) cars. Through this program, it is expected that participants will be better prepared to open jobs in the service areas. This devotion begins with theoretical delivery, consisting of basic component materials and an automobile - conditioned mechanical system. Materials are delivered by methods of speech, discussion and question-and-answer. Participants are given understanding on how the components work, unloading the tides, checking damage, cleaning and trouble shooting on car ac units. The training was followed by 22 participants. The results of this training, being able to provide skill and understanding in the repair of car air conditioning, make it possible for participants to start their own businesses especially in the proper and proper areas of care and car ac repair.
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Afnison, Wanda, Primawati Primawati, Wagino Wagino, Nuzul Hidayat, and Dieter Rahmadiawan. "Air conditioning system maintenance and repair training for youth of Karang Taruna." Community Empowerment 8, no. 7 (July 24, 2023): 954–60. http://dx.doi.org/10.31603/ce.8745.
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This work reports on social service activities at the Department of Automotive Engineering, Faculty of Engineering, Universitas Negeri Padang. This activity is targeted at out-of-school youth in Karang Taruna. The service is carried out in order to increase knowledge and skills in repairing and maintaining the Air Conditioner (AC) system in cars. Through this program, it is hoped that new experiences and knowledge can benefit the people of Karang Taruna. This program is carried out by delivering the basic theory of the car air conditioner working system. The activity is carried out using an AC system trainer. The participants were given an understanding of the methodology, the system of the refrigerants, and how to maintenance or repair the car's air conditioning system. The success rate of this activity is evidenced by the results of the post-test, in which an increment in the average score of 14.4 points.
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Zhao, Xian Mei. "The Development of Intelligent Maintenance and Assessment Simulation System for Automotive Air-Conditioning." Applied Mechanics and Materials 291-294 (February 2013): 911–15. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.911.
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The paper introduces an intelligent maintenance and assessment simulation system for automotive air-conditioning. The system mainly includes the demonstration interfaces for working principle, refrigeration system, heating and gas distribution system, control system, assembling and disassembling training and assessment interface of compressor and clutch, and breakdown maintenance etc. Finally the faults simulation set up, description and repair instruction were introduced.
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Utomo, Indra Bhekti. "Examination of the Air Conditioning System of Toyota Avanza Car at CV. Cipta Artha Berlian Pasuruan." Procedia of Engineering and Life Science 7 (March 15, 2024): 549–54. http://dx.doi.org/10.21070/pels.v7i0.1524.
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The air conditioning (AC) system in a vehicle is a crucial component, especially in cars. Its primary task is to ensure the comfort of the driver and passengers. This system requires monitoring and maintenance for long-term use. This also applies to the AC system in Avanza/Xenia vehicles. Maintenance and repairs are ways to address issues that may weaken or damage your vehicle's AC system. Of course, maintenance and repair procedures should be carried out in accordance with proper troubleshooting rules. Troubleshooting involves a process known as diagnosis, which is the step to identify signs of damage and schedule investigations to resolve existing problems. Inspections involve using measuring tools such as a compressor and a multimeter on the magnetic clutch and evaporator to check the main components of the AC system. This is done to determine whether these components are operating properly according to service and maintenance standards for vehicle AC systems. Upon identification, corrective actions can be taken. The results show that the resistance value of the magnetic clutch coil is 3.9 ohms, and the magnetic clutch gap is 0.5 mm. The blower system resistance with three speed variations is 2.6 ohms at the low position, 0.7 ohms at the middle position, and 0 ohms at the high position. The blower motor resistance is 4 ohms. The measured values fall within the service limits or normal range as per the Avanza/Xenia manual. Therefore, it can be concluded that there are no issues with the AC system in the Avanza/Xenia vehicle, and the condition of the AC system is normal and suitable for use. No repair procedures are required, only routine maintenance is performed to ensure all components are in good condition.
Highlights:
Routine maintenance prolongs AC system lifespan.
Accurate diagnosis prevents potential issues.
Component inspection ensures system health.
Keywords: PMCB, Vehicle Air Conditioning System, Maintenance, Repair, Troubleshooting
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Effendy, Marwan, Eqwar Saputra, and Arif Surono. "PELATIHAN PERAWATAN DAN PERBAIKAN AC MOBIL BAGI SISWA SMK SIAP LULUS." LOGISTA - Jurnal Ilmiah Pengabdian kepada Masyarakat 4, no. 2 (November 10, 2020): 63. http://dx.doi.org/10.25077/logista.4.2.63-69.2020.
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Tulisan ini melaporkan kegiatan pengabdian pada masyarakat yang dilaksanakan di Sekolah Menengah Kejuruan (SMK) Harapan Kartasura. Pengabdian ini difokuskan pada siswa kelas 3 (tiga) yang siap lulus. Pengabdian ini bertujuan untuk memberikan pengetahuan dan keterampilan pada siswa mengenai perbaikan dan perawatan mesin Air Conditioning (AC) mobil. Melalui program ini diharapkan siswa lebih siap dalam mempersiapkan diri untuk memasuki dunia kerja. Pengabdian ini diawali dengan penyampaian teori, berupa materi - materi komponen dasar dan sistem kerja mesin AC mobil. Materi disampaikan dengan metode ceramah, diskusi dan tanya jawab. Siswa diberikan pemahaman terkait cara pencucian unit AC (pembersihan indoor dan outdoor), pengecekan kerja mesin dan trouble shooting dalam AC. Pelatihan diikuti oleh 21 orang peserta. Hasil dari pelatihan ini, mampu memberikan keterampilan dan pemahaman berkaitan dengan AC, sehingga dimungkinkan siswa dapat membuka usaha sendiri khususnya dalam bidang perawatan dan perbaikan AC yang baik dan benar.
Kata Kunci: AC, Pelatihan, Perbaikan, Perawatan, Siswa
ABSTRACT
This paper reports the activities of devotion to the community conducted in vocational High School (SMK) Harapan Kartasura. This devotion is focused on students in grade 3 (three) who are ready to graduate. This devotion aims to provide students with knowledge and skills regarding the repair and maintenance of car air conditioning machines. Through this program, students are expected to be better prepared to enter the workforce. This devotion begins with the submission of theories, the basic component materials and the working system of the car AC engine. The material is delivered by lecture, discussion and question, and answer methods. Students are given an understanding of how the air conditioning unit is washing (indoor and outdoor cleaning), performance checking and troubleshooting in the AC machine. The training was attended by 21 attendance. After this counseling, students are expected to have capable skills, so that they can open their own business, especially in the field of maintenance and repair of good and correct air conditioning.
Keywords: AC, Taining, Repairs, Maintenance, Student
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PP, Triaji, Rizki Muliawan, Apip Badarudin, AR Lukitobudi, and AP Edi S. "Facilities Development with Training of Instructors in Maintenance and Display Case Repair in the Work Training Center (BLK) of Kuningan District." PKM-P 6, no. 2 (December 7, 2022): 372. http://dx.doi.org/10.32832/pkm-p.v6i2.1562.
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The Kuningan West Java Vocational Training Center (BLK) is ready to create manpower to fill the world of work or independent businesses, to reduce unemployment rates. The condition of work training centers that have new buildings but are not yet supported with adequate equipment and human resources and according to needs still require support from stakeholders to improve their quality. Bandung State Polytechnic, especially the Department of Refrigeration and Air Conditioning Engineering, is experienced enough and feels the need to contribute to the development program of the BLK Kuningan, especially in the field of Facilities Development and Instructor Training in the Field of Maintenance and Repair of Display Cases at BLK Kuningan Regency. This program aims to increase the role of the BLK in increasing the competence of Human Resources according to the needs of the labor market. The method implemented is through the Facility Development and Instructor Training Program in the Field of Maintenance and Repair of Display Cases. This activity has been carried out in theory and practice with a ratio of 20% theory and 80% practice in the field which was held at BLK Kuningan. The outputs that have been achieved include training participants having sufficient competence as instructors in the field of refrigeration and air conditioning engineering, especially regarding maintenance and repair of display case machines, availability of job sheets and theory and practice modules on basic refrigeration, especially for display case machines, a set training unit display case and its service equipment.
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PP, Triaji, Rizki Muliawan, Apip Badarudin, AR Lukitobudi, and AP Edi S. "Facilities Development with Training of Instructors in Maintenance and Display Case Repair in the Work Training Center (BLK) of Kuningan District." PKM-P 6, no. 2 (December 7, 2022): 372. http://dx.doi.org/10.32832/jurma.v6i2.1562.
Full textAbstract:
The Kuningan West Java Vocational Training Center (BLK) is ready to create manpower to fill the world of work or independent businesses, to reduce unemployment rates. The condition of work training centers that have new buildings but are not yet supported with adequate equipment and human resources and according to needs still require support from stakeholders to improve their quality. Bandung State Polytechnic, especially the Department of Refrigeration and Air Conditioning Engineering, is experienced enough and feels the need to contribute to the development program of the BLK Kuningan, especially in the field of Facilities Development and Instructor Training in the Field of Maintenance and Repair of Display Cases at BLK Kuningan Regency. This program aims to increase the role of the BLK in increasing the competence of Human Resources according to the needs of the labor market. The method implemented is through the Facility Development and Instructor Training Program in the Field of Maintenance and Repair of Display Cases. This activity has been carried out in theory and practice with a ratio of 20% theory and 80% practice in the field which was held at BLK Kuningan. The outputs that have been achieved include training participants having sufficient competence as instructors in the field of refrigeration and air conditioning engineering, especially regarding maintenance and repair of display case machines, availability of job sheets and theory and practice modules on basic refrigeration, especially for display case machines, a set training unit display case and its service equipment.
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Wang, Shiqiang, Jianchun Xing, Ziyan Jiang, and Juelong Li. "A decentralized sensor fault detection and self-repair method for HVAC systems." Building Services Engineering Research and Technology 39, no. 6 (May 7, 2018): 667–78. http://dx.doi.org/10.1177/0143624418775881.
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This study proposes a novel decentralized sensor fault detection and self-repair method for heating, ventilation and air-conditioning systems. From the perspective of network structure, sensor fault diagnosis in heating, ventilation and air-conditioning systems is distributed to the updated smart sensors without the monitoring host, which is necessary in the traditional centralized method. A fully distributed flat sensor network is established based on fundamental physical equations. Similar to the structure, mechanism and characteristics of biological communities, a smart sensor needs only to communicate with adjacent nodes and operate collaboratively to complete sensor fault detection and self-repair tasks. These tasks are formulated as a constrained optimization and are solved by a decentralized algorithm with a penalty function executed in all the sensor nodes in parallel. The diagnosis model introduces an exponential function method to determine the precise location and undertake self-repair of a fault node. Simulation results on a chilled water system illustrate the effectiveness of the proposed method. Practical application: The traditional sensor fault detection and diagnosis methods for heating, ventilation and air-conditioning systems are based on a centralized structure with several deficiencies, such as high maintenance and labor costs, link congestion and operational lag. This study presents a decentralized sensor network structure and exponential-function-based method that possess the advantages of plug-and-play, rapid deployment, high flexibility and convenience for engineering implementation without having to build a central monitor. The efficiency and effectiveness of the proposed method are demonstrated via a case study.
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Fatma, Nur Fadilah, Henri Ponda, and Trio Adi Saputra. "Perbaikan Perencanaan Penjadwalan Maintenance Pada Air Conditioner (AC) Menggunakan Metode Realibility Centered Maintenance (RCM) Di PT. Tifico Fiber Indonesia Tbk." Journal Industrial Manufacturing 7, no. 2 (September 23, 2022): 103. http://dx.doi.org/10.31000/jim.v7i2.6935.
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In this era of global competition, companies are required to increase productivity in their companies so that they can compete with other companies. One of the indicators in increasing productivity is the level of reliability of the production machines in the company. In measuring how good the reliability of a production machine is, an effective and efficient maintenance process is needed for the company. In this case the Air Conditioner or hereinafter abbreviated as AC is one of the indoor air conditioning devices. One company that uses an Air Conditioner or AC to support the production process and the activities of its employees, especially those working in the production room, is PT Tifico Fiber Indonesia Tbk. The purpose of this study is to determine the critical components and the appropriate interval of Air Conditioner maintenance. Then a study was conducted to propose maintenance scheduling time intervals using the Reliability Centered Maintenance (RCM) method and to determine critical components using the Failure Mode Effect and Analysis (FMEA). From the research, it was found that the critical components of the splite type Air Conditioner component were the outdoor fan motor with an RPN value of 120, a compressor with an RPN value of 200, an outdoor capacitor with an RPN value of 140 and an indoor pcb with an RPN value of 168. Mean Time To Repair (MTTR), Mean Time To Failure (MTTF) Reliability Centered Maintenance (RCM) method obtained by outdoor fan motors for 13 days, compressors for 10 days, outdoor capacitors for 90 days and indoor pcb for 24 days.Keywords : Maintenance, Reliability Centered Maintenance (RCM), Mean Time To Repair (MTTR), Mean Time To Failure (MTTF), Failure Mode Effect and Analysis (FMEA).
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Valenti, Michael. "Stretching Dollars." Mechanical Engineering 123, no. 06 (June 1, 2001): 80–84. http://dx.doi.org/10.1115/1.2001-jun-7.
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Researchers at the Georgia Institute of Technology have developed technologies to lower maintenance costs for the Navy and to automate more tasks at the factory. The scope of the institute’s engineering research has also grown from its origins in textiles, ceramics, and early helicopter—or autogyro—design. Today, student and faculty researchers in Georgia Tech’s Logistics and Maintenance Applied Research Center—LandMARC—are using the latest information technology to reduce the maintenance and logistics costs for aircraft, I transit buses, and emergency vehicles. The first project undertaken by LandMARC is expected to reduce the cost of maintaining the US Navy’s aging fleet of Lockheed Martin P-3 Orion anti-submarine aircraft by more than $1 million per year. Georgia Tech and Navy personnel are concentrating on improving the diagnostic techniques for the Orion’s engine-driven compressor because it is the airplane’s single most costly repair item. The compressor supplies air to several key aircraft systems, including internal pressurization, engine start, and air conditioning.
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Wang, Shiqiang, Jianchun Xing, Ziyan Jiang, and Juelong Li. "Decentralized Optimization for a Novel Control Structure of HVAC System." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/9402538.
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A decentralized control structure is introduced into the heating, ventilation, and air conditioning (HVAC) system to solve the high maintenance and labor cost problem in actual engineering. Based on this new control system, a decentralized optimization method is presented for sensor fault repair and optimal group control of HVAC equipment. Convergence property of the novel method is theoretically analyzed considering both convex and nonconvex systems with constraints. In this decentralized control system, traditional device is fitted with a control chip such that it becomes a smart device. The smart device can communicate and operate collaboratively with the other devices to accomplish some designated tasks. The effectiveness of the presented method is verified by simulations and hardware tests.
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Singh, Madhav Madhusudan, Saroj Kumar Patnaik, Pradeep Srivastva, Harish K. Satia, and Mahavir Singh. "Planning and Designing of Clinical Engineering Department in a Hospital." International Journal of Research Foundation of Hospital and Healthcare Administration 3, no. 2 (2015): 129–34. http://dx.doi.org/10.5005/jp-journals-10035-1049.
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ABSTRACT Biomedical/clinical engineering departments (CED) with expertise in engineering and technology management have a vital role to play in determining the potential for implementation and cost-effectiveness of new medical technologies through technology assessment. It provides planned preventive maintenance and repair facility in a state of optimum operational efficiency along with conducts training and research in clinical engineering. For a successful design, the workflow should be kept in mind in terms of its functional needs that are related to space. The clinical engineering and maintenance unit may consist of functional areas dependent on the operational policy and service demand. Heating, ventilation and air-conditioning (HVAC), lighting and acoustic, electrical, fire planning should be done with deliberation and as per specification. How to cite this article Singh MM, Patnaik SK, Srivastva P, Satia HK, Singh M. Planning and Designing of Clinical Engineering Department in a Hospital. Int J Res Foundation Hosp Healthc Adm 2015;3(2):129-134.
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Yunesman. "PELATIHAN TEKNIK PENDINGIN AIR CONDODITIONER(AC) DI PT WAHLRAB MUKANING BATAM." Jurnal Pengabdian Ibnu Sina 2, no. 2 (July 12, 2023): 99–108. http://dx.doi.org/10.36352/j-pis.v2i2.584.
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ABSTRAK
Permintaan AC juga terus meningkat lantaran kegiatan work from home (WFH) masih menjadi kebiasaan bagi sebagian masyarakat Indonesia di tengah meredanya pandemi. Dampak dari permintaan AC juga terus menyebabkan meningkatnya kebutuhan teknisi untuk memasang dan merawat AC. Tentunya, kebutuhan teknisi service air conditioner (AC) juga meningkat pesat. Salah satunya PT Wahlrab muka kuning batam sebagai perusahaan multinasional yang bergerak dibidang elektronik dalam rangka pemberdayaan karyawan membutuhkan pelatihan pendingin atau AC untuk mengkondisikan proses produksi. Pelatihan ini diikuti oleh 6 peserta dari departemen facility dibagi dalam 2 (dua) sesi, yaitu sesi teori, dan sesi praktik. Pada sesi pertama, peserta diberikan pengetahuan terkait dengan teori berupa materi - materi penunjang praktik dengan metode ceramah, dan diskusi/tanya jawab. Selanjutnya sesi kedua peserta diberikan keterampilan praktik terkait dengan swaging ,bending, brazing, cutting dan pemeliharaan serta pemasangan unit Air Conditioner (AC) (pembersihan indoor dan outdoor) dan pengecekan performa Air Conditioner (AC) dengan metode demonstrasi/peragaan dan praktek yang diikuti oleh peserta.. Pelatihan perawatan Air Conditioner (AC) ini bertujuan untuk memberikan pengetahuan, dan keterampilan kepada karyawan PT Wahlrab khususnya teknisi facility sehingga teknisi mampu merawat, memperbaiki serta pemasangan Air Conditioner (AC) dengan baik. Pelatihan dilaksanakan pada hari libur kerja langsung ditempat kerja facility PT Wahlrab Muka Kuning Batam .Pelatihan pengabdian teknik pendingin atau Air Conditioner ini PT Wahlrab bekerjasama dengan balai pelatihan Equalita Learning Center untuk meningkatkan kemampuan teknik facility PT Wahlrab yang handal dalam pemeliharaan serta pemasangan unit Air Conditioner (AC)
Kata Kunci: Air Conditioner, swaging ,bending, brazing, cutting
ABSTRACT
Air Conditioner (AC) demand also continues to rise as work-from-home (WFH) activities are still a habit for some Indonesians amid a pandemic. The impact of the AC demand also continues to lead to an increasing need for technicians to install and maintain the AC. Of course, the need for air conditioning (AC) service technicians is also growing rapidly. One of them is PT Wahlrab, a multinational company that moves in the electronic field. In order to empower employees, they need cooling training or air conditioning to condition the production process. This training was followed by six participants from the facility department, divided into two sessions, namely the theory sessions and the practical sessions. In the first session, participants were given knowledge related to the theory of material and material supporting practice with the method of lectures and discussion/question answering. Subsequently, in the two sessions, the participants were given practical skills related to swaging, bending, brazing, cutting, and maintenance, as well as the installation of air conditioning (AC) units (indoor and outdoor cleaning) and checking the performance of the AC,, with the method of demonstration, care, and practice followed by the participants. The Air Conditioner (AC) care training is aimed at providing knowledge and skills to PT Wahlrab employees, in particular facility technicians, so that the technician is able to care for, repair, and install Air Conditioners (AC). Training is carried out on the day off directly at the workplace facility, PT Wahlrab Muka Kuning Batam. Training and dedication to cooling engineering or Air Conditioner PT Wahlrab cooperates with the training hall, Equalitas Learning Center, to enhance the technical capabilities of PT Wahlrab reliable facility in the maintenance and installation of air conditioning units (AC).
Keywords: Air Conditioner, swaging ,bending, brazing, cutting
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VERMA, AJIT KUMAR, A. SRIVIDYA, ANIL RANA, and SANJAY K. KHATTRI. "OPTIMIZATION OF MAINTENANCE SCHEDULING OF SHIP BORNE MACHINERY FOR IMPROVED RELIABILITY AND REDUCED COST." International Journal of Reliability, Quality and Safety Engineering 19, no. 03 (June 2012): 1250014. http://dx.doi.org/10.1142/s0218539312500143.
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Ships have a wide variety of machinery available onboard that is crucial for her sustenance at sea for prolonged durations. The machinery can be grouped into various plants, such as propulsion plant, air conditioning plants, power generation plants, etc., each having its own specific function. The plants in turn are composed of various systems which further comprise various types of machinery. There are redundancies built in at the plant level, as well as at the system and at machinery level, so as to improve the reliability of the ship as a whole. Planning of maintenance schedule, specifically for tasks which can only be undertaken in an ashore repair yard is a daunting task for the maintenance managers. The paper presents a NSGA-II (nondominated sorting genetic algorithm) based multi-objective optimization approach to arrive at an optimum maintenance plan for the vast variety of machinery in order to improve the average reliability of ship's operations at sea at minimum cost. The paper presents the advantages that can accrue from introducing short maintenance periods for a select group of machinery, within the constraints of mandatory operational time, over the method of following a common maintenance interval for all the machinery. The problem function in hand is nonlinear, multi-modal and multi-objective in nature. The search spaces for the problem is noncontinuous and the (multiple) variables, such as time interval for maintenance, serial number of equipment, number of minor maintenance actions, etc., are uncoded real parameters.
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Siregar, Muhammad Sapril, Rafi Zidane Shevchenko, and Albert Wiweko. "Penyebab Menurunnya Kinerja Mesin Pendingin di MV. Vancouver." Mutiara : Jurnal Ilmiah Multidisiplin Indonesia 1, no. 2 (October 31, 2023): 89–100. http://dx.doi.org/10.61404/jimi.v1i2.13.
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A cooling machine or commonly called an Air Conditioner (AC) is a system of auxiliary machines that can create cool temperatures in certain rooms so that workers on ships feel comfortable. Cooling machines are used to regulate and manage air quality which are includes air circulation, air conditioning, air hygiene standards and air purification. There are several main components in the cooling machine, namely the Compressor, Condenser, Expansion Valve, Evaporator. Each of these important components has different functions and ways of operating, but are connected to each other so that the cooling machine can function. The purpose of the author making this final project is to determine the performance of the cooling system, factors that reduce the performance of the cooling machine, as well as repair and maintenance efforts so that the cooling machine can return to normal operation. This research was conducted on the MV. Vancouver by using a qualitative approach. The author conducted direct observations as well as in-depth interviews and documentation studies when conducting research. The results of the author's research found that the main factor causing the decline in the performance of the cooling machine was the appearance of sparks on the evaporator and coil pipe caused by interference with the filter dryer so that it inhibits heat absorption and the evaporator cannot evaporate the refrigerant optimally. The impact caused by the less than optimal operation of the cooling machine in the Engine Room Workshop MV. Vancouver was an unstable room temperature making the crew feel uncomfortable while working or resting.
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Rana, Anil. "Optimal maintenance level of equipment with multiple components." Journal of Quality in Maintenance Engineering 22, no. 2 (May 9, 2016): 180–87. http://dx.doi.org/10.1108/jqme-07-2014-0043.
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Purpose – The purpose of the paper is to provide a method for selection of an optimum level of repair by replacement of an equipment based on its cost. In a ship where the engineer has a vast variety of equipment and systems to operate and maintain within limited time frames and availability of human resources, it is often difficult to disassemble a whole equipment to replace a faulty component. It is instead a lot easier to just replace the faulty equipment with whole new equipment. However, such a decision comes at an enormous capital cost. Therefore, the key question is, can we have a model to help us arrive at a decision on the correct level of carrying out repairs? Design/methodology/approach – The paper uses a model based on cost and convolution of failure distributions of critical sub-components of an equipment. Necessary assumptions based on real life experience have been incorporated in the model. Findings – The paper used an example of a particular type of motor driven sea water centrifugal pump which was commonly used in main engine sea water system, firefighting system, air conditioning system, etc. The pump had one of the highest failure rates in the ship (approximately one failure per 150 days) and the engineers found it cost and time effective to replace the entire pump on failure rather than carrying out replacement of the failed components. The model analyzed that the engineer’s hunch was not off the mark. Research limitations/implications – The implication of the work presented in the paper will be savings in maintenance cost and downtime due to optimal level of repairs on a multi-component equipment. The limitations of the work are assumption of independence of failures of components. This may not be true in all the cases. Further, opportunity based maintenance has also not been considered. Originality/value – The originality of the paper lies in the presentation of a method for selection of an optimum level of maintenance for a multi-component equipment
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Slamet Firdaus, Fazrin Andhika, and MAMIN MAMIN. "Analisis Troublehooting Starter Motor terus berputar saat putaran APU Engine mencapai 50% rpm." SEMINAR TEKNOLOGI MAJALENGKA (STIMA) 6 (December 8, 2022): 211–15. http://dx.doi.org/10.31949/stima.v6i0.715.
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Airplanes are a universal means of transportation, with planes, we don't have to worry about the time when we want to go anywhere because with airplane transportation we can go anywhere in an efficient and short time. In this day and age, aircraft technology is very advanced. The aircraft component itself consists of several components, namely the Auxiliary Power Unit (APU). The APU functions to supply pneumatic and electrical energy for aircraft, where the electrical functions for electricity on the aircraft while pneumatic functions for engine starting, hydraulic pressure, air conditioning and others.
This research method is descriptive research consisting of drafting, data collection, data processing and report preparation. In this step there are more stages which will later serve to get a conclusion in the study. Basically the trouble that often occurs when the APU starting process is on the starter motor component, Troubleshoot that often occurs in the starter motor component, namely the starter motor will continue to rotate when it reaches 50% rpm rotation caused by a starter motor problem, starter relay problem and electronical speed switch problem. Therefore, we must immediately repair or replace these components according to the aircraft maintenance manual so that the aircraft remains airworthy.
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Senchenkov, Valentin, Damir Absalyamov, and Dmitriy Avsyukevich. "Diagnostics of life support systems with limited statistical data on failures." E3S Web of Conferences 140 (2019): 05002. http://dx.doi.org/10.1051/e3sconf/201914005002.
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The authors suggest an approach to determine the technical conditions of life support systems of public buildings in conditions of significant uncertainty of statistical information on failures. To improve the re1iabi1ity and increase the resources of life support systems, maintenance and repair strategies are proposed according to the actual state, which implies the availability of objective diagnostic information. The essence of methods for constructing images of system failures based on training procedures is revealed, the latter being founded on the theory of nonparametric statistical analysis. The image is understood as a formalized description of the failure as an element of the system diagnosis model. The solution of image synthesis problem is given when the orthogonal trigonometric basis is applied in the recurrent relations implementing the learning process. The specific case assumes the existence of data on ranges of diagnostic parameter change at all failures of the investigated object. A modification of the training procedure is performed to build images of failures of life support systems of the latest generation when it is possible to find the ranges of changes in diagnostic parameters only in operational state. The modification consists of the formation and application of an orthonormal binary basis in recurrent relations. There is an example of image constructing of one of the ventilation and air conditioning system failures of a public building on the basis of a modified training procedure.
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KRZYZEWSKA, Iwona. "Comparative Analysis Maintenance and Repair Costs of Electric, Hybrid and Combustion Engine Vehicles." Communications of International Proceedings, 2023. http://dx.doi.org/10.5171/2023.4223023.
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As the number of electric and hybrid vehicle users increases, there is growing interest in the topic of maintenance and servicing costs. Many literature sources do not provide information on this topic and only limit themselves to energy costs. However, it is not just energy costs that make up the total cost of owning such a vehicle. What is missing is an analysis of the difference between the cost of maintenance and operation of electric vehicles and that of internal combustion engine vehicles. This paper presents a results of research regarding the repair and servicing costs of electric and hybrid vehicles compared to combustion vehicles. A survey was carried out which shows that the repair costs of electric and hybrid vehicles are more than 20% higher. Repair and servicing of electric and hybrid vehicles should also take into account the repair time (depending on the availability of parts and the repair schedule of the repair shop in question) and the availability of personnel with the appropriate competence for such a repair. The five most frequently replaced items in internal combustion vehicles were: braking system, suspension system, oils and operating fluids and air conditioning. The five most frequently replaced items in hybrid and electric vehicles are: battery replacement or reconditioning, coolant replacement, suspension system, oils and operating fluids, electronics in general and braking system.
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Abbaszadeh, Mohammad Hossein, and Javad Sepahi-Younsi. "Computational study of multiphase flow in cement plant gas conditioning towers: a review." Advances in Cement Research, August 9, 2023, 1–47. http://dx.doi.org/10.1680/jadcr.22.00128.
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Gas conditioning or cooling towers have broad industrial applicability, especially in the cement industry. Most cement factories deal with the same problems as others do. However, the solutions to these problems are barely internationally published and have not received much attention, which results in spending a lot of time and money researching the previous solutions. Iran is among the top ten cement manufacturing countries in the world. Therefore, many of these problems have occurred in Iranian cement factories. The purpose of the present paper is to provide a review of studies in this field over the last decades, with a particular focus on advances in Iran. This paper concludes the most important findings of the literature to suggest the best possible solutions for improving the performance and lifetime of gas conditioning towers and for decreasing the common problems, such as dust build-up and wet bottom. Furthermore, the paper reviews the numerical methods for modelling different aspects of these towers. The results can also be used to reduce water and energy consumption, air pollution, and repair and maintenance costs of cement factories.
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Mochamad Yuse Waramitha. "Inventory Information System on Goods Stock in PT Berkatmas Mulia Guna." Procedia of Engineering and Life Science 1, no. 1 (April 14, 2021). http://dx.doi.org/10.21070/pels.v1i1.864.
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Stock Inventory Information System is a system used to enter inventory data for incoming and outgoing goods into the database, controlling inventory, and providing inventory information. So that there will be no errors in data input, data output, and report results based on the desired data. PT Berkatmas Mulia Guna is a company engaged in HVAC (Heating, Ventilation, and Air Conditioning) contractors. Includes new installation of HVAC machines and systems, maintenance and repair of HVAC systems. PT Berkatmas Mulia Guna also includes manufacturing HVAC machines such as AHU, FCU, Exhaust Fan, Supply Fan and Heating. A lot of data changes and a long process of stock data collection from suppliers and customers in the process of processing inventory data, will result in inaccurate data obtained. In inventory data collection, recording of incoming and outgoing goods still uses a manual process with excel which can result in duplicate data or duplicate data for processing inventory data. Based on this problem, the authors conducted a study entitled "Inventory Information System Stock Goods at PT. Berkatmas Mulia Guna ”which aims to make it easier to handle the stock inventory process, data entry and exit, delivery of goods, so that the inventory process of goods is faster and more precise. This application system development method uses the waterfall method which consists of six stages. The stages are System Analysis and Design, software requirements analysis, system design, coding, system testing and maintenance. In making this application using a desktop-based website programming language for the Windows operating system, and using the MySql database.
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Gurmu, Argaw, and Pabasara Wijeratne Mudiyanselage. "Plumbing defects in residential buildings: analysis of anomalies and their causes." Facilities, August 4, 2023. http://dx.doi.org/10.1108/f-10-2022-0130.
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Purpose Most residential building owners often report problems associated with the plumbing systems. If identified at the early stages, plumbing-related defects can be easily repaired. However, if unnoticed for a long period of time, they could lead to major damages and incur a significant cost to repair. Despite the problems, studies investigating plumbing anomalies and their root causes in residential buildings are limited. This study aims to explore plumbing defects and their potential causes, diagnosis methods and repair techniques in residential buildings. Design/methodology/approach This research used data collected through an extensive survey of both academic and grey literature. Through the content analysis, plumbing defects and the associated causes have been identified and presented in tabular format. Findings The study investigated the anomalies and causes in the residential plumbing system under five key sub-systems: water supply system; sanitary plumbing system; roof drainage system; heating, ventilation, air conditioning and gas system; and swimming pool. Accordingly, some of the identified plumbing defects include leakages, corrosion, water penetration, slow drainage and cracks. Damaged pipes, faulty equipment and installations are some of the common causes of the anomalies. Visual inspection, hydrostatic pressure test, thermography, high-tech pipe cameras, infrared cameras, leak noise correlators and leak loggers are techniques used for diagnosing anomalies. Reactive, preventive, predictive and reliability-centred maintenance strategies are identified to control or prevent anomalies. Originality/value The findings of this research can be used as a useful tool or guideline for contractors, plumbers, facilities managers and building surveyors to identify and rectify plumbing system-related defects in residential buildings.
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Nadia Adzkia, Dewi Shofi Mulyati, and Selamat. "Usulan Perbaikan Kualitas Layanan di Bengkel Motor dengan Pendekatan Metode Servqual." Jurnal Riset Teknik Industri, December 19, 2023, 107–12. http://dx.doi.org/10.29313/jrti.v3i2.2850.
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Abstract. Indonesia's automotive industry is growing every year, especially motorcycles. Motorbike users need a workshop as a means of repairing and maintaining their vehicles on a regular basis. Therefore, repair shop service providers must improve their services in order to gain consumer trust for the services that have been provided. AHASS Bintang Alam Jaya is one of Honda's official repair shops in Bandung Regency. Astra Honda Authorized Service Station or AHASS is a motorcycle repair shop that offers engine maintenance, sells spare parts and official genuine Honda parts. AHASS Bintang Alam Jaya provides service standards in general, namely light service and heavy service with certified mechanics. AHASS Bintang Alam Jaya faced the problem of complaints from consumers who were submitted to the workshop after carrying out the service and the number of visitors who came to the AHASS workshop did not reach the monthly target set by the workshop (management). The phenomenon that occurs at the AHASS Bintang Alam Jaya workshop is the fluctuation of consumers who come to the workshop to service the motorbike. This study will use the Service Quality Method (SERVQUAL) to determine the level of customer satisfaction with the motorcycle service offered by AHASS Bintang Alam Jaya Workshop by categorizing each service using the TERRA dimension (Tangible, Empathy, Reliability, Responsiveness, Assurance). Based on the calculations, there are 12 services that must be repaired out of a total of 26 existing service attributes, namely waiting room facilities provided (availability of drinking water, helmet racks, TV, readings and information boards), availability of clean toilets, availability of wifi and air conditioning, friendliness and politeness of the workshop staff (smiling, greeting, greeting, polite, polite), Mechanics (Motorcycle Service Workforce) Explaining the maintenance or repairs to be carried out, Employees can explain the estimated service services and spare part prices, Fast service provided by the workshop staff in respond to existing complaints, Ease of contacting the workshop by telephone,Employees contact you after the service is complete,Employees are able to find out and repair damage in an appropriate manner,Results of workshop repairs or services are as promised by the workshop and according to customer expectations,Employees honestly provide information to consumer.
Abstrak. Industri otomotif Indonesia berkembang meningkat setiap tahunnya, khususnya sepeda motor. Pengguna motor tersebut membutuhkan bengkel sebagai sarana perbaikan dan perawatan kendaraannya secara berkala. Oleh karena itu penyedia jasa bengkel harus meningkatkan pelayanannya agar mendapatkan kepercayaan konsumen atas jasa yang telah diberikan. AHASS Bintang Alam Jaya merupakan salah satu bengkel resmi Honda yang ada di Kabupaten Bandung. Astra Honda Authorized Service Station atau AHASS merupakan bengkel motor yang menawarkan perawatan mesin, menjual sperpart dan suku cadang asli resmi Honda. AHASS Bintang Alam jaya melayani standar service pada umumnya yaitu service ringan dan sevice berat dengan tenaga mekanik yang bersertifikat. AHASS Bintang Alam Jaya menghadapi masalah adanya keluhan dari konsumen yang di ajukan kebengkel setelah melakukan service dan jumlah pengunjung yang datang ke bengkel AHASS tidak mencapai target bulanan yang telah di tetapkan oleh bengkel (manajemen). Fenomena yang terjadi di bengkel AHASS Bintang Alam Jaya yaitu terjadinya fluktuasi konsumen yang datang ke bengkel untuk melakukan service motor. Penelitian ini akan menggunakan Metode Service Quality (SERVQUAL) untuk mengetahui tingkat kepuasan konsumen terhadap pelayanan servis sepeda motor yang ditawarkan Bengkel AHASS Bintang Alam Jaya dengan mengkategorikan setiap pelayanan menggunakan dimensi TERRA (Tangible, Empathy, Reliability, Responsiveness, Assurance). Berdasarkan perhitungan didapatkan 12 pelayanan yang harus diperbaiki dari keseluruhan 26 atribut pelayanan yang ada yaitu Fasilitas Ruang Tunggu yang diberikan (ketersedian air minum, Rak Helm, TV, bacaan, dan papan informasi), Tersedia Toilet yang bersih, Tersedia Wifi dan AC, Keramahan dan kesopanan petugas bengkel (tersenyum,salam,sapa,sopan,santun), Mekanik (Tenaga kerja Servis Motor) Menjelaskan mengenai perawatan atau perbaikan yang akan dilakukan, Karyawan dapat menjelaskan mengenai perkiraan jasa service dan harga spare part, Pelayanan yang cepat diberikan petugas bengkel dalam menanggapi keluhan yang ada, Kemudahan menghubungi bengkel melalui telepon,Karyawan menghubungi Anda setelah service selesai, Karyawan mampu mengetahui dan memperbaiki kerusakan dengan tepat, Hasil perbaikan atau servis bengkel sesuai dengan yang di janjikan oleh bengkel dan sesuai harapan pelanggan, Karyawan secara jujur memberikan informasi kepada konsumen.