This paper presents a water resilience assessment framework that includes a set of resilience indicators that will guide in building urban water resilience.
Efficient resource management and the development of resilient societies begins with an accurate identification of strengths and weaknesses of systems involved. Conducting a holistic performance analysis considering multiple assessment criteria permits the detection of discrepancies hindering systems productivity. In this study, an integrative assessment tool, based on the analytical hierarchy process (AHP) and the energy, water, and food (EWF) nexus is used to design a decision-making scheme that guides policymakers in establishing national priorities and sectorial strategies.
By the year 2019, the number of people without access to electricity was 770 million, most of which lived in rural areas. The currently models for rural electrification are often limited in their electrical analysis, or focus on a idealistic optimal solution whilst ignoring the real hierarchical topology of power systems. This work proposes a rural electrification strategy that makes use of Geographic Information System (GIS), graph theory and terrain analysis to create the best electric network topology.
The energy, exergy and economic analysis of indirect type solar dryer (ITSD) was performed while drying green chilli under forced and natural convection. Fans powered by PV panels were used for forced convection setup. The collector and drying efficiencies of the forced convection dryer were found to be 63.3% and 10.4% and the same was 53.84% and 8.90% in natural convection ITSD, respectively. The specific moisture extraction rate (SMER) of green chilli in ITSD was found to be 0.6526 and 0.5603 kg/kW-h under forced and natural convection, respectively.
In this paper, we use standard scenarios focussing on renewable energy, energy efficiency and grid investments. We take stock of the literature and quantitative data on available sources of financing for clean energy to qualitatively match supply and demand of specific sources of finance in the European context. Our analysis shows that under the current investment mandates and lending criteria the required funds for a successful energy transition are available. In fact, the current landscape of financing sources can provide between two and six times what is necessary.
Urbanisation is increasing in many countries, leading to the establishment of 33 megacities, representing huge water demand which is increasingly difficult to supply, exemplified by the recently avoided Day Zero event in Cape Town (2018) and the ongoing water crisis in Chennai, India. The ongoing growth of megacities could lead to the potential for further Day Zero events in countries ill-equipped to deal with such a situation. This study analyses the water supply and demand situations in 12 megacities hosting 194 million people.
Various studies have shown that maritime sector needs increased use of zero emission vessels in service by 2030 in order to achieve an absolute reduction in CO2 emissions of 50% by 2050 (consistent with a 2 °C pathway). These vessels, with operational emissions containing zero or negligible greenhouse gas share, would need to represent a significant portion of newbuilds from that point onwards.
Elsevier, Renewable and Sustainable Energy Reviews, Volume 116, December 2019
Nepal has been suffering from a serious energy crisis for decades. It has severely affected its economic, social and political developments. Owing to the continuously evolving energy situation in Nepal, and the recent progress in renewable energy technologies, this study aims to provide an up to date perspective on the current energy crisis in Nepal. In particular, the current energy production and consumption profiles are reviewed, and the main factors contributing to a widening gap between the energy supply and demand are identified.
The question of how to enable an effective, modern, global energy transition is garnering significant interest in both academic and policy making communities. Composite statistical indices have emerged as a useful class of tools to offer policymakers additional insights into the state and trajectory of energy transitions around the world. In this commentary, we discuss the purpose of energy indices in general and document several prominent examples. We then introduce and place in this landscape the World Economic Forum's Energy Transitions Index (ETI).
Electricity systems based on renewables have an increasing demand for flexibility. This paper considers the potential of power-to-gas to provide flexibility and enhance system integration of renewables. Existing research on power-to-gas typically analyses the system effects of a predetermined power-to-gas unit without endogenising the investment decision. Moreover, insights related to market and portfolio effects of power-to-gas are rare. To this end this work presents a stochastic electricity market model.