scholarly journals Jib crane bearing selection through simulation

2020 ◽  
Vol 14 (27) ◽  
pp. 67-73
Author(s):  
Juan Sebastián Lugo Pinilla
Keyword(s):  
Electrical Energy ◽  
Simulation Software ◽  
Correct Operation ◽  
Corrective Maintenance ◽  
The Caribbean ◽  
Maintenance Process

Through the corrective maintenance process of a bearing, regardless of its origin, certain anomalies related to its main elements, due to the condition of the type of maintenance, are expected. This was the case of the jib crane of the Caribbean Submarine fleet, used mainly to load the wiring and charging sockets for the supply of electrical energy to the Submarines. During a routine operation, it malfunctioned and stopped working without warning. An inspection was carried out in which corrective maintenance was deemed necessary, it was at the time that the bearing support was uncovered and its advanced state of deterioration was observed. Being this the main failure, and through application of engineering principles and simulation software, the reason for the deterioration was determined, and the optimal bearings for the correct operation of the jib crane were selected.

scholarly journals Numerical Evaluation of a HVAC System Based on a High-Performance Heat Transfer Fluid

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3298
Author(s):  
Gianpiero Colangelo ◽  
Brenda Raho ◽  
Marco Milanese ◽  
Arturo de Risi
Keyword(s):  
Heat Transfer ◽  
High Performance ◽  
Cooling System ◽  
Electrical Energy ◽  
Simulation Software ◽  
Heat Transfer Fluid ◽  
Hvac System ◽  
Dynamic Simulations ◽  
Heating And Cooling ◽  
The University

Nanofluids have great potential to improve the heat transfer properties of liquids, as demonstrated by recent studies. This paper presents a novel idea of utilizing nanofluid. It analyzes the performance of a HVAC (Heating Ventilation Air Conditioning) system using a high-performance heat transfer fluid (water-glycol nanofluid with nanoparticles of Al2O3), in the university campus of Lecce, Italy. The work describes the dynamic model of the building and its heating and cooling system, realized through the simulation software TRNSYS 17. The use of heat transfer fluid inseminated by nanoparticles in a real HVAC system is an innovative application that is difficult to find in the scientific literature so far. This work focuses on comparing the efficiency of the system working with a traditional water-glycol mixture with the same system that uses Al2O3-nanofluid. The results obtained by means of the dynamic simulations have confirmed what theoretically assumed, indicating the working conditions of the HVAC system that lead to lower operating costs and higher COP and EER, guaranteeing the optimal conditions of thermo-hygrometric comfort inside the building. Finally, the results showed that the use of a nanofluid based on water-glycol mixture and alumina increases the efficiency about 10% and at the same time reduces the electrical energy consumption of the HVAC system.

Enhancement of Gravity Ventilation in Buildings

2017 ◽  
Author(s):  
Magdalena Nakielska ◽  
Krzysztof Pawłowski
Keyword(s):  
Natural Ventilation ◽  
Air Flow ◽  
Electrical Energy ◽  
Climatic Conditions ◽  
Demand Systems ◽  
Solar Chimney ◽  
Correct Operation ◽  
Research Results ◽  
Heat Demand ◽  
Flow Through

Nowadays, people are looking for solutions related to ventilation, cooling or heat demand systems, which would be energy efficient and, at the same time, would not cause the degradation of the surrounding environment. As far as ventilation is concerned, an good solution is a natural ventilation, which improves thermal comfort rooms without increasing the consumption of electrical energy in the building. In order to improve the mode of action of the natural ventilation in the building, one can mount various elements supporting the air flow. One of them is a solar chimney. In order to check the correct operation of a gravity ventilation installation in Poland’s climatic conditions, the measurements was carried out on a test stand on the 3.1 building of UTP University of Science and Technology in Bydgoszcz. The received results show the intensification of the air flow through the room the value between 50% and 150%, depending on a measuring hour (Chen et al. 2003). These research results were compared with the research results received before the installation of the solar chimney on the ducts of the gravity ventilation.

scholarly journals Biomass Steam Gasification, High-Temperature Gas Cleaning, and SOFC Model: A Parametric Analysis

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5936
Author(s):  
Vera Marcantonio ◽  
Danilo Monarca ◽  
Mauro Villarini ◽  
Andrea Di Carlo ◽  
Luca Del Zotto ◽  
...  
Keyword(s):  
Energy Content ◽  
Aspen Plus ◽  
Electrical Energy ◽  
Simulation Software ◽  
Steam Gasification ◽  
Operating Conditions ◽  
Electrical Efficiency ◽  
Gas Cleaning ◽  
Predicting Performance ◽  
Steady State Model

Gasification technology is actually one of the most effective ways to produce power and hydrogen from biomass. Solid oxide fuel cells (SOFCs) have proved to be an excellent energy conversion device. They can transform the chemical energy content in the syngas, produced by a gasifier, directly into electrical energy. A steady-state model of a biomass-SOFC was developed using process simulation software, ASPEN Plus (10, AspenTech, Bedford, MA, USA). The objective of this work was to implement a biomass-SOFC system capable of predicting performance under diverse operating conditions. The system is made of a gasification zone, gas cleaning steps, and SOFC. The SOFC modelling was done without external subroutines, unlike most models in the literature, using only the existing ASPEN Plus blocks, making the model simpler and more reliable. The analysis of the syngas composition out of each cleaning step is in accordance with literature data. Then, a sensitivity analysis was carried out on the main parameters. The results indicate that there must be a trade-off between voltage, electrical efficiency, and power with respect to current density and it is preferable to stay at a low steam-to-biomass ratio. The electrical efficiency achieved under the operating conditions is 57%, a high value, making these systems very attractive.

Single Phase PV Inverter Applying a Dual Boost Technology

2016 ◽  
Vol 5 (2) ◽  
pp. 95 ◽  
Author(s):  
Sudha Bhutada ◽  
S.R. Nigam
Keyword(s):  
Single Phase ◽  
Electrical Energy ◽  
Simulation Software ◽  
Matlab Simulation ◽  
Generation System ◽  
Photovoltaic Panel ◽  
Pv Inverter ◽  
Single Phase Inverter ◽  
Pv Generation ◽  
Pv Grid

<p>In this paper, a single-phase PV inverter applying a dual boost converter circuit inverter is proposed for photovoltaic (PV) generation system and PV grid connected system. This system is designed to improve integration of a Single phase inverter with Photovoltaic panel. The DC 24V is converted into to 86V DC and then 86V DC to 312V DC. The 312 V DC is then successfully inverted to AC 220V. Hence solar energy is powerfully converted into electrical energy for fulfilling the necessities of the home load, or to link with the grid. Matlab Simulation software was used for simulation of the circuit and outcome is presented in this paper.</p>

scholarly journals The Machine Technology Of Automatic Chicken Egg Shelling With Independent Energy Source For Chicken Farmer Groups In Sungai Ulun Urban Village Banjarbaru City

2020 ◽  
Vol 1 (1) ◽  
pp. 24-29
Author(s):  
Noor Saputera ◽  
Edy Robinson Sampe ◽  
Lauhil Mahfudz Hayusman
Keyword(s):  
Electrical Energy ◽  
Chicken Meat ◽  
Production Costs ◽  
Chicken Egg ◽  
Native Chicken ◽  
Service Activity ◽  
Optimal Maintenance ◽  
Chicken Eggs ◽  
Maintenance Process ◽  
Meat And Eggs

Free-range chicken farming is a promising business, because the need for animal protein, especially chicken meat and eggs, is still quite high in the community. In order to meet these needs, of course, it must be balanced with an optimal maintenance process in order to produce chicken meat and eggs continuously. The problems in the field show that, the process of incubating chicken eggs is still carried out conventionally with a fairly small success rate, and the chicken egg incubator that has been made by one of the chicken breeders has very minimal technological touch, where the egg turning process is still using hands which is done regularly The unavailability of measuring and controlling the temperature and humidity of the incubator, the incandescent lamp used as a chicken egg heater still relies on a source of electricity from PLN, of course this will reduce the profit margin to be obtained. The service activity that will be carried out is the application of automatic chicken egg incubator technology with independent electrical energy sources in the form of solar power plant technology (PLTS) in the native chicken farmer business group in Sungai Ulin Village, Banjarbaru City. It is hoped that with this community service activity, the knowledge and interest of chicken breeders about the application of chicken egg incubator technology and PLTS technology will increase, so that it can save production costs and increase the amount of income.

Modeling and Simulation Research on the Maintenance System of Armored Equipment

2011 ◽  
Vol 383-390 ◽  
pp. 7265-7269
Author(s):  
Yong Zhang ◽  
Hong Wei Yang ◽  
Sheng Feng Wang
Keyword(s):  
Waiting Time ◽  
Queue Length ◽  
Simulation Software ◽  
System Efficiency ◽  
Simulation Research ◽  
Maintenance System ◽  
Statistical Experiments ◽  
Maintenance Process ◽  
Business Flow ◽  
Support Plan

The evaluation of system efficiency for the special task or reasonableness of the business flow are usually required in the maintenance system of armored equipment. The paper analyzed the process of armored equipment maintenance system. Then a simulation model of a military maintenance process is built on Extend simulation software. By means of statistical experiments, some key results are obtained including the time in finishing the system process, queue length, waiting time and the utilization of the service platform in the process, which could provide solid evidence for evaluating the system efficiency to help make the equipment support plan.

Investigating Imperfect Inspection of Avionics System and its Relationship with Availability Percentage

2012 ◽  
Vol 225 ◽  
pp. 534-539
Author(s):  
Aisyah Razana Mahayudin ◽  
Mohamed Tarmizi Ahmad ◽  
Fairuz Izzuddin Romli ◽  
Amzari Zhahir
Keyword(s):  
Preventive Maintenance ◽  
Discrete Event ◽  
Operating Conditions ◽  
Simulation Methods ◽  
Corrective Maintenance ◽  
Event Simulation ◽  
Operational Life ◽  
System Maintenance ◽  
Maintenance Policies ◽  
Maintenance Process

System maintenance is necessary to prolong the operational life of a system. There are four types of maintenance policies which are corrective, preventive, scheduled and predictive (conditioning based maintenance). However, this paper focuses on preventive maintenance and corrective maintenance policies. In general, the goal of preventive maintenance is to retain the system at its good operating conditions before the occurrence of any failure while corrective maintenance is done as a result of the system’s operating failure. This paper investigates the effects of maintenance activities for Engine Indication and Flight Instruments subsystems of the avionics system of a general aircraft. The simulation of the maintenance process is done using Monte Carlo and Discrete Event simulation methods for different preventive maintenance interval (PMI).

Development of C.B.T Hot End Yoke Device for Hot Line Insulator Replacement of 230-kV Double Suspension String for Two Bundles with Arcing Horn

2014 ◽  
Vol 931-932 ◽  
pp. 862-866
Author(s):  
Charoenchai Kajonwattanakul ◽  
Wanwisa Skolpap
Keyword(s):  
Power Plant ◽  
Transmission Line ◽  
High Voltage ◽  
Transmission Lines ◽  
Electrical Energy ◽  
Initial Letter ◽  
Corrective Maintenance ◽  
Maintenance Time ◽  
Central Regions ◽  
High Voltage Transmission

Electrical energy generating from power plant is transmitted to electrical substations via high-voltage transmission lines. After a certain period time of use, the transmission line is required for maintenance such as insulator replacement. To avoid power interruption during insulator replacement, a corrective maintenance, hot line maintenance, is performed. This research focused on the hot line insulator replacement of 230 kV Bangsapan-Chumporn and 230 kV Chumporn-Suratthani transmission lines transferring power between southern and central regions of Thailand. The maintenance of 230 kV double suspension string for two bundles with arcing horn required developed C.B.T. hot end yoke tool to enhance stability and availability of electrical energy during hot line insulator replacement. C.B.T was named by the initial letter of the name of Chumporn Bandon and Takuapa transmission lines under authorization of the maintenance section in responsible maintaining service of transmission lines in upper southern provinces. The developed C.B.T hot end yoke device for hot line insulator replacement could save about 2.67 million bahts during 7-hour of maintenance time of EGAT payment.

scholarly journals Modelling and Efficiency Analysis of InGaP/GaAs Single Junction PV cells with BSF

2019 ◽  
Vol 8 (6) ◽  
pp. 623-627 ◽  
Keyword(s):  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Past Research ◽  
Open Circuit ◽  
Simulation Software ◽  
Optical Characteristics ◽  
Tcad Simulation ◽  
Silvaco Atlas

The purposes of PV cells are to transfer light energy into electrical energy. A compelling BSF is a key basic component for a productive PV cell.. In this paper, two significant materials GaAs and InGaP with top BSF and base BSF cells are researched utilizing the computational numerical modelling TCAD tool based Silvaco ATLAS. Past research observed that on the current coordinating condition with top BSF layer and base BSF layer, the cell show a general upgrade of density in Isc (short circuit current ) and Voc (open circuit voltage ) subsequently improving the overall efficiency of the cell. In this paper, structure of various thin film PV cells based on III-V materials e.g. GaN, InGaN have been used to design the multi junction PV cells. Extraction of figures of merits (efficiency, open circuit OC voltage, short circuit SC current and fill factor), simulation of electrical and optical characteristics of these devices have been carried out in this work. Our focus is to improve the optical characteristics, refractive index and absorption coefficient of InGaP with BSF and tunnelling features. In this paper complete Simulation and experimental results are shown and compared. The objective of this paper is to examine the productivity of InGaP/GaAs PV cells utilizing the Silvaco Atlas TCAD simulation software.

scholarly journals A feasibility study of electrical energy generation from municipal solid waste in Iraq: Najaf case study

2020 ◽  
Vol 10 (4) ◽  
pp. 3403
Author(s):  
Othman M. Anssari ◽  
Esam A. Alkaldy ◽  
Naseem Almudhaffar ◽  
Abbas Nasir AlTaee ◽  
Nabeel Salih Ali
Keyword(s):  
Production Cost ◽  
Low Cost ◽  
Electrical Energy ◽  
Simulation Software ◽  
Waste Products ◽  
Electricity Crisis ◽  
Proposed Model ◽  
Key Factor ◽  
One Year

In several developing countries, the electricity crisis obstructs both socio-economic and technological sustainable evolution. Also, it leads to reducing job availability due to shut down several industries or relocate to neighbouring countries to such an issue. A Najaf City is an important holy and tourist city in the middle of Iraq country. Indeed, waste management in An Najaf City needs to be reconsidered to be used as an energy source. In this article, we investigated and listed the waste quantity which produced recently (one year) respect to waste types and types of content. Data collected from the waste products for one year and are used as a key factor to study the feasibility of generating electrical energy from collected MSWs. The proposed model was simulated and tested respect to cost analysis factor of the suggested power plant by Homer pro simulation software. Results were very encouraging and competitive to the current energy production cost based on the production cost of the Kwh prospective among the conventional methods in Iraq. The proposed scenario provide proper and secure waste proposal technique with low-cost.

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