Energy Efficiency and Econometric Analysis of Organic Kiwifruit (Actinidia Deliciosa A. Chev.) Production

The energy exchange ratio of cultivation and different parameter values of input affecting the organic production of kiwifruit in the mid-hill Himalayan region of India during 2017 and 2018 was determined. The experimental trial was divided into 7 organic treatment i.e. T1 to T3 was sole application on equivalence 100 per cent Dairy manure (DM), Vermicompost (VC) and Poultry manure, T4 to T7 was a compound application of 50: 50 DM: PM, DM: VC and VC: PM and T7 in which DM = PM = VC applied on N equivalence. Five foliar sprays of organic formulation were applied in each of the treatment. The Energy efficiency and econometric analysis of organic kiwifruit production were examined. The highest energy inputs unit per hectare was utilized by T1 out of which over 86 per cent were from organic manure inputs and provided 26401.02 MJ/ha. The highest yield per hectare, as well as the output energy were observed in the treatment T5. Whereas the highest energy ratio, energy productivity, and specific energy were recorded under T2. Likewise, the highest productivity ratio and benefit-cost ratio were recorded under T7 which was followed by T2. From a farming point of view, the T2 gave the superior result because it has provided optimum amount output along with maximum returns. Bangladesh J. Bot. 50(4): 1051-1057, 2021 (December)

Design and Development of an Online Smart Monitoring and Diagnosis System for Photovoltaic Distributed Generation

In photovoltaic power plants, fault diagnosis tools are essential for ensuring a high energy yield. These tools should be capable of accurately identifying and quantifying the factors behind the various fault mechanisms commonly found in photovoltaic plants. Considering the aforementioned factors, this article proposes an online smart PV monitoring solution, which is capable of detecting malfunctions that arise from accidental and/or technical causes through the analysis of I-V curves, however, without the necessity to interrupt the operation of the system, thus reducing the maintenance cost. Accidental causes can lead to the reduction of energy productivity due to the excessive accumulation of dirt on the photovoltaic modules, partial shading and eventual errors that occur during its installation. On the other hand, technical causes can be attributed to faults found on the photovoltaic modules, which lead to gradual losses in their electric and material characteristics. Therefore, by using the electric characteristics supplied by the manufacturer of the installed modules, the I-V and P-V curves of the operational photovoltaic strings were obtained in real time, compared to the respective theoretical curves obtained through mathematical modeling. In order to validate the proposed online monitoring system and its potential for predictive maintenance application, a field experimentation was mounted in a 93.8 kWp photovoltaic system.

Future Trends and Aging Analysis of Battery Energy Storage Systems for Electric Vehicles

The increase of electric vehicles (EVs), environmental concerns, energy preservation, battery selection, and characteristics have demonstrated the headway of EV development. It is known that the battery units require special considerations because of their nature of temperature sensitivity, aging effects, degradation, cost, and sustainability. Hence, EV advancement is currently concerned where batteries are the energy accumulating infers for EVs. This paper discusses recent trends and developments in battery deployment for EVs. Systematic reviews on explicit energy, state-of-charge, thermal efficiency, energy productivity, life cycle, battery size, market revenue, security, and commerciality are provided. The review includes battery-based energy storage advances and their development, characterizations, qualities of power transformation, and evaluation measures with advantages and burdens for EV applications. This study offers a guide for better battery selection based on exceptional performance proposed for traction applications (e.g., BEVs and HEVs), considering EV’s advancement subjected to sustainability issues, such as resource depletion and the release in the environment of ozone and carbon-damaging substances. This study also provides a case study on an aging assessment for the different types of batteries investigated. The case study targeted lithium-ion battery cells and how aging analysis can be influenced by factors such as ambient temperature, cell temperature, and charging and discharging currents. These parameters showed considerable impacts on life cycle numbers, as a capacity fading of 18.42%, between 25–65 °C was observed. Finally, future trends and demand of the lithium-ion batteries market could increase by 11% and 65%, between 2020–2025, for light-duty and heavy-duty EVs.

Aplikasi Metode American Productivity Center (APC) Dan Analisis Fishbone diagram Untuk Meningkatkan Produktivitas

UKM Kerupuk Acoy is a small and medium business engaged in the production of kerupuk and kemplang which has been established since 2012. After conducting interviews it was found that there were internal problems caused by a decrease in productivity, namely the use of resources that were not yet efficient so that although there was an increase in sales but the benefits are not maximized. To overcome this, it is necessary to apply the APC method to see which inputs have an index below 100% so that improvements are needed to increase productivity. The results of data processing showed a decrease in productivity levels material, energy, and capital inputs. Using fishbone diagram analysis, the root cause of the problem was found, namely low material productivity due to waste of raw materials for flour and cooking oil as well as too dense kerupuk dough form and making kemplang dough rolls too large, low energy productivity due to gas waste due to infrequent cleaning of stove fires, and low productivity. capital because the amount of working capital used is not proportional to the output produced. The solutions to increase productivity that have been implemented are cleaning the stove fire after use, reducing working capital, reducing the size of the cracker print and the diameter of the kemplang rolls, and paying attention to the use of flour and cooking oil so as not to spill on the floor. After implementation, there was an increase in the productivity of material, energy, and capital inputs respectively by 6.28252%; 6.28278%; and 0.05713% which causes an increase in output productivity of 6.283%.

The Effects of Rain Intensity and Water Elevation with Energy Productivity of Kracak Hydro Power Plant, Bogor Regency – West Java

This paper was aimed to know the effects of rain intensity and water elevation with energy productivity of Kracak Hydro Power Plant, Bogor Regency – West Java. The method used multiple regression analysis with a quantitative approach to describe the effects of rain intensity and water elevation with energy productivity of Kracak Hydro Power Plant. Based on the data, the highest rain intensity was in February of 13,35 mm with water elevation of 346,09 cm and produced electrical energy of 198.296 kWh. The lowest rain intensity was in July of 0,86 mm with water elevation of 194,02 cm and produced electrical energy of 49.772 kWh. The average rain intensity was 8,9 mm with water elevation of 324,12 cm and produced electrical energy of 156.010 kWh. The results of testing the effect of rain intensity with energy productivity at the Kracak hydropower plant resulted in a significance value of 0.002 (p <0.05) and a t value of 4.306. This value indicates that the significance value is below 0.05 and has a positive coefficient direction. It means that rain intensity has a significant positive effect with energy productivity at the Kracak hydropower plant. And the results of testing the effect of water elevation with energy productivity at the Kracak hydropower plant resulted in a significance value of 0.003 (p <0.05) and a t value of 3.864. This value indicates that the significance value is below 0.05 and has a positive coefficient direction. It means that water elevation has a significant positive effect with energy productivity at the Kracak hydropower plant. The conclusion on this research is the rain intensity and water elevation have effects with energy productivity of Kracak Hydro Power Plant.

Implementation of the 2030 sustainable development goals - affordable and clean energy in Poland

One of the most serious challenges facing the world, including the European Union and Poland, is the climate crisis and environmental pollution. The article presents an analysis of the implementation of sustainable development goals in the field of Affordable and clean Energy in Poland. The Sustainable Development Goals have replaced the Millennium Goals and enable their continuation. They were defined at the United Nations Conference in 2012. 17 goals and 169 actions were set. Sustainable Development Goals are a set of activities, the implementation of which is to lead to the development of sustainable development in the environmental, social and economic terms. Achieving the goals will be possible among others through changes in the field of climate, education, poverty or the natural environment. The study analyses, inter alia, such indicators related to the discussed objectives like energy import dependency by products, energy productivity, share of renewable energy in gross final energy consumption by sector, final energy consumption in households per capita were analysed. This made it possible to indicate the level of achievement of the set goals, as well as to determine the possibility of achieving the goals set by 2030. The authors also presented the results of the generated for the analysed indicators forecasts. The presented results were obtained with the use of mathematical models, which were finally selected by the authors after the validation process. The time horizon of the forecasts was adjusted to the requirements of sustainable development goals. Countermeasures that can be taken to accelerate the deadline for achieving the targets were also outlined.