Identifying Actions to Prepare Electricity Infrastructure in Seaports for Future Power Supplying Cruise Ships with Energy from Land

Cruise ships are unfortunately at the infamous forefront of the means of maritime transport emitting the largest amounts of harmful substances into the atmosphere and aquatic environment. At the initiative of IMO and the European Union, formal restrictions were introduced regarding the level of harmful emissions on the high seas and in ports generated by seagoing vessels. To meet these challenges, shipowners have invested in various technological solutions on their ships to reduce the number of harmful emissions, and by ordering new vessels; they promote the use of pro-ecological solutions related to energy saving and eliminate environmental harm. However, despite the actions taken by shipowners, seaports unfortunately lag behind the challenges and expectations of the market and are still not prepared, for example, to power the ships moored in ports with shore-side energy to reduce the environmental pollution when the ships are at berth. The aim of this paper is to identify actions taken by seaport authorities to prepare electricity infrastructure in seaports to power vessels with energy from the land. Key legal restrictions concerning reduction in pollutions emitted from ships in the ports are also described and analyzed. The results of the study also show the approach of seaports to the issue of Onshore Energy Supply for cruise ships. The research was conducted among the selected ports in the Baltic Sea Region where cruise ships are accepted. The following research questions were formulated: (1) What legal regulations oblige seaports and shipowners to reduce the level of pollutions emitted into the environment? (2) Do the ports use a benchmark to assess the level of harmful emissions when defining the amount of port fees for cruise shipowners? (3) How are cruise ships powered in the port? (4) What investments are planned in the port regarding the infrastructure related to the diversification of shore-side electricity for the ships? The studies were conducted by using a few research methods, i.e., the desk research method, the exploration method, and the CAWI Computer Assisted Web Interview. The results of this research can provide an interesting source of information both for cruise ship owners and cruise seaport authorities, but also potentially for shipyards where new vessels are constructed.

Analisis Kebutuhan Pengembangan E-Modul Bermuatan Video Pembelajaran pada Pendidikan Jarak Jauh bagi Calon Guru Fisika

Distance Education (PJJ) as a learning solution during the COVID-19 pandemic at the University of Lampung has not been implemented optimally. The purpose of this study was to find out the circumstances and needs of prospective physics teacher students while carrying out PJJ online from their respective homes. As well as analyzing the materials and assignments to achieve the Subject Learning Outcomes (CPMK) of Educational Research Statistics. This study uses a descriptive analysis method with a research instrument in the form of a questionnaire distributed online with the help of a google form. The sample in this study was 53 students of physics teacher candidates in the Physics Education Study Program, University of Lampung. The results of this study indicate that the condition of students in implementing PJJ is that they already have adequate facilities both from electricity infrastructure, internet networks, devices, and getting support from family. However, students find it difficult to understand practical learning when using media and learning methods that are not varied. The analysis of materials and tasks developed from CPMK Educational Research Statistics consists of three main materials with ten learning videos, and each student is asked to complete matters an educational research case using SPSS. Based on the results of this needs analysis, lecturers need to develop a teaching material, namely an e-module containing learning videos that can facilitate prospective physics teacher students in implementing PJJ.

Assessing the Determinants of Electricity Generation Infrastructure in Nigeria

The supply and demand for electricity have outpaced available infrastructure in Nigeria despite the abundant energy resources. The paper investigates the determinants of electricity generating infrastructure in Nigeria for the period 1980 to 2016. Using an Autoregressive Distributed Lag model, electricity generation capacity was used as an indicator for electricity infrastructure development. Its expansion was based on the behaviour of inflation rate, total government expenditure, interest rate, private sector financial credit, exchange rate, real GDP per capita, real gross fixed capital formation, and the rate of urbanisation. Financial credit to private sector, total public expenditure, real per capita income, real gross fixed capital formation, urbanization, and exchange rate adversely affect the development of electricity generation capacity. Investment in generating assets is capital intensive, which should be matched with adequate private sector financing. If the power sector subsidy will remain and achieve its objective, strategies that will lead to sustaining exchange rate stability should be promoted. Based on estimate, every one million population require 1000MW of electricity to function in modern-day society implying that Nigeria needs 180,000MW of electricity capacity. The realisation of this is hinged on large scale electricity infrastructure investment enabled, partly, by the favourable macroeconomic environment.JEL Classification: E16, O1, O2

An In-Depth Life Cycle Assessment (LCA) of Lithium-Ion Battery for Climate Impact Mitigation Strategies

Battery energy storage systems (BESS) are an essential component of renewable electricity infrastructure to resolve the intermittency in the availability of renewable resources. To keep the global temperature rise below 1.5 °C, renewable electricity and electrification of the majority of the sectors are a key proposition of the national and international policies and strategies. Thus, the role of BESS in achieving the climate impact mitigation target is significant. There is an unmet need for a detailed life cycle assessment (LCA) of BESS with lithium-ion batteries being the most promising one. This study conducts a rigorous and comprehensive LCA of lithium-ion batteries to demonstrate the life cycle environmental impact hotspots and ways to improve the hotspots for the sustainable development of BESS and thus, renewable electricity infrastructure. The whole system LCA of lithium-ion batteries shows a global warming potential (GWP) of 1.7, 6.7 and 8.1 kg CO2 eq kg−1 in change-oriented (consequential) and present with and without recycling credit consideration, scenarios. The GWP hotspot is the lithium-ion cathode, which is due to lithium hexafluorophosphate that is ultimately due to the resource-intensive production system of phosphorous, white, liquid. To compete against the fossil economy, the GWP of BESS must be curbed by 13 folds. To be comparable with renewable energy systems, hydroelectric, wind, biomass, geothermal and solar (4–76 g CO2 eq kWh−1), 300 folds reduction in the GWP of BESS will be necessary. The areas of improvement to lower the GWP of BESS are as follows: reducing scopes 2–3 emissions from fossil resource use in the material production processes by phosphorous recycling, increasing energy density, increasing lifespan by effective services, increasing recyclability and number of lives, waste resource acquisition for the battery components and deploying multi-faceted integrated roles of BESS. Achieving the above can be translated into an overall avoided GWP of up to 82% by 2040.

Increasing the Utilization of Existing Infrastructures by Using the Newly Introduced Boundary Voltage Limits

The increasing share of distributed generation aggravates voltage limit compliance at customers’ delivery points. Currently, grid operators validate compliance with the voltage limits specified in Grid Codes by conducting load flow simulations at the medium voltage level, considering the connected low voltage grids as ‘loads’ to reduce the modeling effort. This approach does not support the accurate validation of limit compliance, as the voltage drops at the low voltage level are unknown. Nevertheless, to guarantee acceptable voltages even under worst-case conditions, safety margins are involved that impair the utilization of the electricity infrastructure. This study conducts load flows simulations in a test distribution grid, revealing the variable character of the voltage limits at different system boundaries. The conventional load model is extended by new parameters—the boundary voltage limits—to enable the consideration of variable voltage limits in load flow analysis of LINK-based smart grids. The standardized structure of the LINK-architecture allows for the systematic and accurate validation of voltage limit compliance by reducing the required modeling data to the technically necessary minimum. Use cases are specified that allows smart grids to increase the utilization of the electricity infrastructure by day-ahead scheduling and short-term adaptation of boundary voltage limits.

Pengaruh Infrastruktur Terhadap Pertumbuhan Ekonomi Di Sumatera Selatan

This study examines the effect of road infrastructure, electricity infrastructure, and PDAM infrastructure on economic growth in South Sumatra using time-series data from 2005 to 2018. The analytical method used in this research is Ordinary Least Square (OLS). The partial test results show that road infrastructure, electricity infrastructure, and PDAM infrastructure do not affect economic growth. Meanwhile, road infrastructure, electricity infrastructure, and PDAM infrastructure have a significant effect on economic growth simultaneously. The coefficient of determination (R²) is 0.737163, which means that the effect of road infrastructure, electricity infrastructure, and water infrastructure on economic growth in South Sumatra province is 0.737163 or 73.71%, and the remaining 26.29% is influenced by variables outside of this study. The correlation coefficient in this study is 0.8585 or 85.85%. So the level of relationship that Road Infrastructure, Electricity Infrastructure, and Water Infrastructure have on Economic Growth are very strongly linked.Keywords:Economic Growth, road infrastructure, electricity infrastructure, and PDAM infrastructure.

Methodological Framework for Resilience Assessment of Electricity Infrastructure in Conditions of Slovak Republic

The quality of the environment as well as public health is convincingly coupled with the functioning of a power subsector. The power subsector plays a pivotal role in the sense that it emerges as the key cross-sectional element for the society’s functioning (production, services, healthcare, education and others). A modern society consists of infrastructure systems that are primarily dependent on continuous electricity supplies. Each and every element of the electric power infrastructure is unique, and thus, its malfunction can disrupt the functioning of an important part of the electric power infrastructure. In conjunction with ensuring the functioning of electric power infrastructure, our attention must be drawn to the resilience issue. As far as the resilience of electric power infrastructure is concerned, it can resist weather-related events ensuring there are no disruptions in continuous electricity supplies. First, in the introductory part, the article presents the legal framework in the Slovak Republic. Second, it describes the current state of the electric power infrastructure of Slovakia. Third, it handles the state of the level of security risk assessment. Later on, in the literature review, besides turning to the issue of resilience assessment, the authors focused on the area of resilience of power engineering. Furthermore, the article scrutinizes resilience assessment in Slovakia, and it briefly examines approaches towards natural threats. In addition, the article demonstrates several approaches towards flood resilience. Having used different methods, the primary concern is to devise a framework for resilience assessment. Therefore, the included case study examines aspects of the proposed framework for resilience assessment. In conclusion, our aim was, in most respects, to outline an innovative methodological framework for increasing the resilience of electricity infrastructure.

Everyday contours and politics of infrastructure: Informal governance of electricity access in urban Ghana

This article contributes to shaping the discourse on unequal geographies of infrastructure and governance in the global South, opening up new ways of thinking through politics, practices and modalities of power. Conceptually, informality, governance and everyday urbanism are drawn on to unpack how the formal encounters the informal in ways that (re)configure infrastructure geographies and governance practices. This conceptual framing is empirically employed through an analysis of electricity access in Accra, Ghana, highlighting how residents navigate unequal electricity topographies, engage in self-help initiatives, and negotiate informal networks and formal governance practices. The spatiality of the electricity infrastructure has created inequity and opportunities for exploitation by ‘power-owners’ and ‘power-agents’ who control and manage the electricity distribution network and, in turn, privately supply power. Electricity connections are negotiated, access is monetised and illegality excused on grounds of good-neighbourliness, thereby producing and perpetuating everyday politics of ‘making do’. Community movements, everyday acts of improvisation, and incremental modifications are shown to influence the workings of formal institutions of government and shape uneven power relations and experiences of inequality. Such an understanding of how marginalised residents navigate the electricity topographies of Accra reveals a more nuanced politics of infrastructure access, which reflects the complex realities of hybridised modalities of governance and the multiple everyday dimensions of power that shape urban space. The article concludes that informality should not be recognised as failure but as a sphere of opportunity, innovation and transition.