scholarly journals Investigating the Impact of Economic Uncertainty on Optimal Sizing of Grid-Independent Hybrid Renewable Energy Systems

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1468
Author(s):  
Mostafa Rezaei ◽  
Udaya Dampage ◽  
Barun K. Das ◽  
Omaima Nasif ◽  
Piotr F. Borowski ◽  
...  
Keyword(s):  
Small Scale ◽  
Optimal Size ◽  
Economic Uncertainty ◽  
Average Value ◽  
Hybrid Renewable Energy Systems ◽  
A Value ◽  
Inflation Rates ◽  
The Many ◽  
Hybrid Renewable Energy ◽  
The Impact

One of the many barriers to decarbonization and decentralization of the energy sector in developing countries is the economic uncertainty. As such, this study scrutinizes economics of three grid-independent hybrid renewable-based systems proposed to co-generate electricity and heat for a small-scale load. Accordingly, the under-study systems are simulated and optimized with the aid of HOMER Pro software. Here, a 20-year average value of discount and inflation rates is deemed a benchmark case. The techno-economic-environmental and reliability results suggest a standalone solar/wind/electrolyzer/hydrogen-based fuel cell integrated with a hydrogen-based boiler system is the best alternative. Moreover, to ascertain the impact of economic uncertainty on optimal unit sizing of the nominated model, the fluctuations of the nominal discount rate and inflation, respectively, constitute within the range of 15–20% and 10–26%. The findings of economic uncertainty analysis imply that total net present cost (TNPC) fluctuates around the benchmark value symmetrically between $478,704 and $814,905. Levelized energy cost varies from an amount 69% less than the benchmark value up to two-fold of that. Furthermore, photovoltaic (PV) optimal size starts from a value 23% less than the benchmark case and rises up to 55% more. The corresponding figures for wind turbine (WT) are, respectively, 21% and 29%. Eventually, several practical policies are introduced to cope with economic uncertainty.

scholarly journals ANALISIS USAHA IKAN HIAS AIR TAWAR DI KOTA JAMBI

2020 ◽  
Vol 3 (1) ◽  
pp. 25-37
Author(s):  
Dodi Hadisaputra ◽  
Ernawati ◽  
Suandi
Keyword(s):  
Qualitative Method ◽  
Large Scale ◽  
Fish Farming ◽  
Ornamental Fish ◽  
Small Scale ◽  
General Description ◽  
Average Value ◽  
A Value ◽  
Net Benefits ◽  
Business Cost

Ornamental fish is a fish that has a distinctive shape, color and character so as to create an aquarium atmosphere that supports spatial layout and is able to provide a peaceful atmosphere. The purpose of this study was to determine the description of ornamental fish business and analyze the feasibility of ornamental fish business in Jambi City. The qualitative method is used to describe descriptively the general description of the location of the study and the characteristics of ornamental fish farmers, while the quantitative method uses the Analysis of Income and Revenue of ornamental fish business, cost analysis, income analysis and cost balance (R/C Ratio), Net Benefits - Cost Ratios (Net B/C), and institutionally descriptive for the betta fish, guppy and botia ornamental fish business. Overall, the general description of ornamental fish farming business in Jambi City is conducted conventionally. The average R/C ratio of the Betta ornamental fish business is 2.60, guppy is 2.02 and botia is 1.22. The highest average NPV in the betta ornamental fish in the mid-scale farming business is Rp. 60,745,160.71, guppy on a large scale is Rp. 31,385,065.48, and botia on a large scale with a value of Rp. 78,034,144.35. Overall, this ornamental fish business has an NPV value of> 0. The ornamental fish business in Jambi City is feasible to run and develop, betta ornamental fish business on a small scale with an average B/C Ratio of 1.15 and medium with an average value of average 1.60, guppy on a small scale with an average value of 1.02, and botia on a medium scale with an average value of 1.00 and large with a value of an average of 1.22. Keywords: Ornamental Fish, Jambi City.

scholarly journals Hierarchical Agent-Based Integrated Modelling Approach for Microgrids with Adoption of EVs and HRES

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Peng Han ◽  
Jinkuan Wang ◽  
Yan Li ◽  
Yinghua Han
Keyword(s):  
Electricity Consumption ◽  
Integrated Modelling ◽  
Agent Based ◽  
Complex Interactions ◽  
Hybrid Renewable Energy Systems ◽  
Proposed Model ◽  
Hybrid Renewable Energy ◽  
The Impact ◽  
Modelling Approach ◽  
Modelling Approaches

The large adoption of electric vehicles (EVs), hybrid renewable energy systems (HRESs), and the increasing of the loads shall bring significant challenges to the microgrid. The methodology to model microgrid with high EVs and HRESs penetrations is the key to EVs adoption assessment and optimized HRESs deployment. However, considering the complex interactions of the microgrid containing massive EVs and HRESs, any previous single modelling approaches are insufficient. Therefore in this paper, the methodology named Hierarchical Agent-based Integrated Modelling Approach (HAIMA) is proposed. With the effective integration of the agent-based modelling with other advanced modelling approaches, the proposed approach theoretically contributes to a new microgrid model hierarchically constituted by microgrid management layer, component layer, and event layer. Then the HAIMA further links the key parameters and interconnects them to achieve the interactions of the whole model. Furthermore, HAIMA practically contributes to a comprehensive microgrid operation system, through which the assessment of the proposed model and the impact of the EVs adoption are achieved. Simulations show that the proposed HAIMA methodology will be beneficial for the microgrid study and EV’s operation assessment and shall be further utilized for the energy management, electricity consumption prediction, the EV scheduling control, and HRES deployment optimization.

scholarly journals Pengembangan Lembar Kerja Peserta Didik (LKPD) Berbasis Inkuiri Pada Materi Pengklasifikasian Ikan

JURNAL IQRA ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 1-14
Author(s):  
Yulia Anita ◽  
Saleh Hidayat ◽  
Haryadi Haryadi
Keyword(s):  
Learning Outcomes ◽  
Large Scale ◽  
Positive Response ◽  
Student Learning Outcomes ◽  
Small Scale ◽  
Inquiry Based Learning ◽  
Average Value ◽  
A Value ◽  
Development Procedure ◽  
Expert Validation

This article aimed to determine the practicality, validity, and test the effectiveness of material inquiry-based education. The research development procedure basically consists of two main objectives, namely: (1) develop products and (2) test the effectiveness of products in achieving goals. The results showed that the way to develop inquiry-based learning models  reviewed the source supporting fish classification material, made the initial draft LKPD, do expert validation and revision, small-scale trials and large-scale trials. Based on the validity test, the developed LKPD was very valid category with an average value of 84.6 all aspects of the assessment. Students also gave a positive response to LKPD with was developed with an of 84.7. This indicated that the valid LKPD was used in the learning process. The effectiveness of LKPD has increased the achievement of student learning outcomes with the presentation of the pretest-posttest value gaining a value of 63.64%. The results of the research obtained be concluded that the LKPD developed meets the medium category, so that it was practical, valid and effective to use. Key words: The Development of LKPD, Inqury-Based Education, The Effectiveness of LKPD

Optimum Design of Small-Scale Stand-Alone Hybrid Renewable Energy Systems

2017 ◽  
pp. 279-306
Author(s):  
Juan M. Lujano-Rojas ◽  
Rodolfo Dufo-López ◽  
José L. Bernal-Agustín ◽  
Gerardo J. Osório ◽  
João P.S. Catalão
Keyword(s):  
Renewable Energy ◽  
Optimum Design ◽  
Energy Systems ◽  
Small Scale ◽  
Renewable Energy Systems ◽  
Hybrid Renewable Energy Systems ◽  
Hybrid Renewable Energy

Construct 2 Berbasis Android Sebagai Bahan Ajar Relasi dan Fungsi

2020 ◽  
Vol 3 (1) ◽  
pp. 17-28
Author(s):  
Resti Pangestu ◽  
Farida ◽  
Siska Andriani
Keyword(s):  
Large Scale ◽  
Average Score ◽  
Small Scale ◽  
Teaching Material ◽  
Design Development ◽  
Average Value ◽  
A Value ◽  
Large Scale Field ◽  
The Media ◽  
Addie Model

This research and development uses the ADDIE model which includes 5 steps namely analysis, design, development, implementation, and evaluation. The results of this study are android-based M-learning teaching materials assisted by Construct 2 on the subject matter of relations and functions. This teaching material gets an assessment in the valid category with an average value of 3.40 in the material experts and includes a valid category with a value of 3.54 in the media expert. In small-scale trials followed by 3C and 5D classes with 10 students each getting an average score of 3.47 with very interesting criteria. In the large-scale field trial which was attended by 30 students of 3E grade the average score of attractiveness was 3.57 and grade 5C with an average of 3.38 with very interesting criteria. Effect size test results in class 3E with 0.56 results and in class 5C of 0.57 with moderate criteria. Based on these results it can be concluded that the Android-based M-learning teaching material is assisted by construct 2 on the material of the relation and the function is feasible and effective to be used as a learning aid.

scholarly journals DAMPAK PANDEMI COVID-19 TERHADAP EKONOMI DAN LINGKUNGAN FISIK DI DESA WISATA DI BALI

2021 ◽  
Vol 20 (2) ◽  
pp. 99-106
Author(s):  
Dewa Ayu Made Lily Dianasari
Keyword(s):  
Physical Environment ◽  
Negative Impact ◽  
Positive Impact ◽  
Sampling Technique ◽  
Average Value ◽  
A Value ◽  
Confirmatory Factor ◽  
Tourist Village ◽  
The Impact ◽  
Positive Statement

The COVID-19 pandemic had a very significant impact on tourism in Bali, as evidenced by decreasing tourist visits to Bali. The decline of tourist visits had an impact on the economy and the physical environment in Bali, especially in Tourism Villages. The survey was conducted on the local communities involved in the management of tourist villages in Bali as many as 100 respondents to get the community's perception of the impact given to the economy and the physical environment during the COVID-19 pandemic. The sampling technique used was proportionally stratified random sampling and analyzed by using confirmatory factor analysis. Community perceptions in tourist villages in Bali about the impact of the COVID-19 pandemic on the economy have a negative impact. This can be seen from the highest average value which has the highest loading factor matrix value of 0,773. The perception of communities in tourist villages in Bali about the impact of covid 19 on the environment tends to have a positive impact. This can be seen from the results of the highest loading factor value in a positive statement with a value of 0,868; that is cleaner water conditions in the tourist village.

scholarly journals Exploring the Impact of Terminators on Transgene Expression in Chlamydomonas reinhardtii with a Synthetic Biology Approach

Life ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 964
Author(s):  
Katrin Geisler ◽  
Mark A. Scaife ◽  
Paweł M. Mordaka ◽  
Andre Holzer ◽  
Eleanor V. Tomsett ◽  
...  
Keyword(s):  
Synthetic Biology ◽  
Chlamydomonas Reinhardtii ◽  
Transgene Expression ◽  
Model Organism ◽  
Optimal Size ◽  
Gfp Reporter Gene ◽  
The Many ◽  
High Level ◽  
The Impact ◽  
Synthetic Biology Approach

Chlamydomonas reinhardtii has many attractive features for use as a model organism for both fundamental studies and as a biotechnological platform. Nonetheless, despite the many molecular tools and resources that have been developed, there are challenges for its successful engineering, in particular to obtain reproducible and high levels of transgene expression. Here we describe a synthetic biology approach to screen several hundred independent transformants using standardised parts to explore different parameters that might affect transgene expression. We focused on terminators and, using a standardised workflow and quantitative outputs, tested 9 different elements representing three different size classes of native terminators to determine their ability to support high level expression of a GFP reporter gene. We found that the optimal size reflected the median size of element found in the C. reinhardtii genome. The behaviour of the terminator parts was similar with different promoters, in different host strains and with different transgenes. This approach is applicable to the systematic testing of other genetic elements, facilitating comparison to determine optimal transgene design.

scholarly journals Exploring the impact of terminators on transgene expression in Chlamydomonas reinhardtii with a synthetic biology approach

2021 ◽  
Author(s):  
Katrin Geisler ◽  
Mark A. Scaife ◽  
Pawel M. Mordaka ◽  
Andre Holzer ◽  
Payam Mehrshahi ◽  
...  
Keyword(s):  
Synthetic Biology ◽  
Chlamydomonas Reinhardtii ◽  
Transgene Expression ◽  
Model Organism ◽  
Optimal Size ◽  
Gfp Reporter Gene ◽  
The Many ◽  
High Level ◽  
The Impact ◽  
Synthetic Biology Approach

Chlamydomonas reinhardtii has many attractive features for use as a model organism for both fundamental studies and as a biotechnological platform. Nonetheless, despite the many molecular tools and resources that have been developed, there are challenges for its successful engineering, in particular to obtain reproducible and high levels of transgene expression. Here we describe a synthetic biology approach to screen several hundred independent transformants using standardised parts to explore different parameters that might affect transgene expression. We focused on terminators and, using a standardised workflow and quantitative outputs, tested 9 different elements representing three different size classes of native terminators to determine their ability to support high level expression of a GFP reporter gene. We found that the optimal size reflected the median size of element found in the C. reinhardtii genome. The behaviour of the terminator parts was similar with different promoters, in different host strains and with different transgenes. This approach is applicable to the systematic testing of other genetic elements, facilitating comparison to determine optimal transgene design.

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