scholarly journals Pengurangan Pencemaran Udara berdasarkan Konsep Pelabuhan Hijau

2020 ◽  
Vol 8 (2) ◽  
pp. 252
Author(s):  
CONNY KURNIAWAN WACHJOE ◽  
HERMAGASANTOS ZEIN ◽  
YANTI SUPRIYANTI ◽  
TINA MULYA GANTINA ◽  
ANNISA KURNIASETIAWATI ◽  
...  
Keyword(s):  
Air Pollution ◽  
Diesel Engine ◽  
Power Supply ◽  
Negative Impact ◽  
Electrical Power ◽  
Port Area ◽  
Sea Transportation ◽  
Process Operation ◽  
Loading And Unloading ◽  
Ship Berthing

ABSTRAKPerdagangan bebas antara negara-negara di dunia telah mengubah pergerakan orang dan barang yang memberi dampak signifikan pada pemanfaatan transportasi laut. Fenomena ini akan berdampak pada peningkatan jumlah kapal yang berlabuh di pelabuhan. Ketika catu daya listrik tidak tersedia untuk kapal di pelabuhan, mesin diesel kapal dioperasikan untuk memenuhi kebutuhan beban listrik selama proses bongkar muat. Pengoperasian mesin diesel akan berdampak negatif pada area pelabuhan karena kebisingan dan polusi udara. Makalah ini akan menyediakan metode pasokan daya shore to ship (STS) yang memasok listrik dari darat ke kapal. STS dapat digunakan untuk meningkatkan kualitas udara di area pelabuhan. Hasilnya telah secara signifikan mengurangi jumlah polusi udara berbahaya, terutama untuk emisi NOx, VOC, dan PM masing-masing sebesar 97%, 94% dan 89%.Kata kunci: pelabuhan laut, pembangkit listrik tenaga diesel, shore to ship, berlabuh, emisi gas buang berbahaya ABSTRACTFree trade agreements between countries in the world have changed the movement of people and goods which creates a significant impact on sea transportation. This phenomenon will have an impact on the rapid increase in the number of vessels resting at the port. When the electrical power supply is not available for ships in the port, the ship diesel engine is operated to meet the electrical load during the loading and unloading process. Operation of the diesel engine will have a negative impact on the port area due to noise and air pollution. This paper will provide a shore-to-ship (STS) power supply method that supplies electricity from land to ships. STS can be used to improve air quality in the port area. The results have significantly reduced the amount of harmful air pollution, especially for NOx, VOC, and PM emissions by 97%, 94% and 89% respectively.Keywords: port, diesel plant, shore to ship, berthing, harmful air polution

scholarly journals Shore Power Supply (Cold Ironing) for Ships: Reducing Ship Engine Emissions

2010 ◽  
Author(s):  
Thane Gilman
Keyword(s):  
Power Supply ◽  
Transition Period ◽  
Electrical Power ◽  
Electrical Power System ◽  
Engine Emissions ◽  
Warm Up ◽  
Port Area ◽  
Large Populations ◽  
Sulphur Oxides ◽  
Cold Iron

Cold Iron: Receipt of shore power, along with other utilities such as potable water and steam, is part of the process of placing the engineering plant in a status known as “cold iron.” The term originates from the steamship era, when ship boilers and engines would go relatively cold after being secured. To bring a steam plant back online, supplying its own power after a “cold iron” period, would involve a substantial light-off, warm-up, and transition period compared to modern, fully automated plants. Onshore power supply (OPS, sometimes referred to as “cold ironing”) is a system of procedures and equipment that provides ships with a source of electrical power as an alternative to the ship’s service electrical power system. The primary benefit is that, since the ship no longer has main or auxiliary engines operating, the engine emissions are virtually eliminated in the port area. Many ports around the world are located near large populations, and engine emissions from ships unfortunately contribute to unwanted levels of nitrogen oxides, sulphur oxides, particulate matter, and even the “greenhouse gas” carbon dioxide. Onshore power supply achieves a better total emissions reduction result than ship-installed emissions equipment, because the engines are off-line. On the other hand, there are difficulties associated with high voltage, varying frequencies, safety and infrastructure costs that must be addressed in order to justify an onshore power supply installation. Paper published with permission.

Dimensionamiento de un horno de fundición por inducción electromagnética y cálculo de los parámetros eléctricos

2019 ◽  
pp. 1-15
Author(s):  
Arnulfo Pérez-Pérez ◽  
Jorge Sergio Téllez-Martínez ◽  
Gregorio Hortelano-Capetillo ◽  
Jesús Israel Barraza-Fierro
Keyword(s):  
Induction Heating ◽  
Power Supply ◽  
Electromagnetic Induction ◽  
Cast Steel ◽  
Electrical Power ◽  
Heating System ◽  
Heating Time ◽  
Ferrous Alloys ◽  
Electromagnetic Induction Heating ◽  
Induction Heating System

In this work, the dimensions of a furnace for melting of ferrous alloys were determined. The furnace has an electromagnetic induction heating system. In addition, the parameters of electrical power supply such as frequency and power were calculated. A 5kg cast steel mass with a density of 7.81 kg / dm3 was proposed. This corresponds to a crucible volume of 0.641 dm3. The frequency was obtained from tables, which take into account the diameter of the crucible, and its value was 1 KHz. The energy consumption was determined with the heat required to bring the steel to the temperature of 1740 K, the energy losses through the walls, bottom and top of the crucible. This value was divided between the heating time (30 minutes) and resulted in a power of 4.5 KW. The development of the calculations shows that the induction heating is an efficient process and allows a fast melting of ferrous alloys.

scholarly journals The Influence of Urban Sprawl on Air Pollution and the Mediating Effect of Vehicle Ownership

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1261
Author(s):  
Aiping Tao ◽  
Qun Liang ◽  
Peng Kuai ◽  
Tao Ding
Keyword(s):  
Air Pollution ◽  
Urban Sprawl ◽  
Negative Impact ◽  
Empirical Support ◽  
Mediating Effect ◽  
Vehicle Ownership ◽  
Mediating Role ◽  
Effect Model ◽  
Significant Negative Impact ◽  
The Impact

Based on the panel data of 224 prefecture-level and above cities in China from 2003 to 2016, this paper empirically studies the impact of urban sprawl on air pollution and introduces a mediating effect model to test the mediating role of vehicle ownership concerning the impact of urban sprawl on air pollution. The research in this paper arrives at three conclusions. First, urban sprawl has a significant positive effect on air pollution, and this conclusion is still valid after solving the endogeneity problem and conducting a robustness test. Second, the results of mediating effect test show that urban sprawl indirectly affects air pollution through the partial mediating effect of vehicle ownership. By removing the mediating effect, urban sprawl has a significant negative impact on air pollution, indicating that the mediating effect of vehicle ownership is higher concerning the impact of urban sprawl on air pollution. Third, further panel quantile regression results show that the higher the level of air pollution, the weaker the mediating effect of vehicle ownership and the stronger the direct effect of urban sprawl on air pollution. These conclusions can provide some empirical support for solving the air pollution problems caused by urban sprawl in China.

Comprehensive Pricing Model of Urban Traffic Air Pollution Based on Bi-Level Programming

2012 ◽  
Vol 253-255 ◽  
pp. 1913-1917
Author(s):  
Ze Bin Zhao
Keyword(s):  
Air Pollution ◽  
Negative Impact ◽  
Urban Traffic ◽  
Vehicle Speed ◽  
Pricing Model ◽  
The Sustainable Development ◽  
Transport Services ◽  
Relationship Model ◽  
The Relationship

In order to reduce the negative impact of urban traffic air pollution, this paper firstly analyzes the relationship between urban traffic air pollution and vehicle speed, after providing the relationship model, the paper establishes a comprehensive pricing model of urban traffic air pollution based on bi-level programming, the model considers the traffic air pollution pricing, and includes the factors of congestion pricing, bus fee, pricing revenue redistribution on improvement of public transport services and the expansion of road capacity. The case study shows that the implementation of comprehensive pricing of urban traffic air pollution can reduce traffic pollution and unreasonable traffic flow, which is conducive to the sustainable development of the city.

A proposal of electrical power supply to Brazilian Amazon remote communities

2010 ◽  
Vol 34 (9) ◽  
pp. 1314-1320 ◽  
Author(s):  
Ana Rosa Duarte ◽  
Ubiratan Holanda Bezerra ◽  
Maria Emilia de Lima Tostes ◽  
André Montenegro Duarte ◽  
Geraldo Narciso da Rocha Filho
Keyword(s):  
Power Supply ◽  
Electrical Power ◽  
Brazilian Amazon ◽  
Remote Communities
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