Techno-Economic Analysis of a PV (Photovoltaic) Plant for High Radiation Conditions from the Altiplanic of Bolivia

2019 ◽  
Author(s):  
Abel Antonio Taquichiri Ayaviri ◽  
Abdiel Mallco Carpio ◽  
Alan Almendras ◽  
Miguel Alejandro Ruiz Orellana ◽  
Carlos Portillo
Keyword(s):  
Economic Analysis ◽  
High Radiation ◽  
Photovoltaic Plant ◽  
Radiation Conditions

scholarly journals One task of routing jobs in high radiation conditions

2021 ◽  
Vol 58 ◽  
pp. 94-126
Author(s):  
A.G. Chentsov ◽  
A.A. Chentsov ◽  
A.N. Sesekin
Keyword(s):  
Dynamic Programming ◽  
Numerical Solution ◽  
Model Problem ◽  
Optimal Solution ◽  
High Radiation ◽  
Dose Load ◽  
Route Problem ◽  
Precedence Conditions ◽  
Sequential Bypass ◽  
Radiation Conditions

The problem of sequential bypass of megalopolises is investigated, focused on the problem of dismantling a system of radiation hazardous objects under constraints in the form of precedence conditions. The radiation impact on the performers is assessed by the doses received during movements and during the performance of dismantling works. The route problem of minimizing the dose load of workers carrying out dismantling in one or another sequence of operations is considered. The procedure for constructing an optimal solution using a variant of dynamic programming is investigated. On this basis, an algorithm is built, implemented on a PC. Examples of the numerical solution of a model problem for the minimum dose load are given.

scholarly journals BIOFERTILIZERS AND BIOCONTROLLERS AS AN ALTERNATIVE TO THE USE OF CHEMICAL FERTILIZERS AND FUNGICIDES IN THE PROPAGATION OF YERBA MATE BY MINI-CUTTINGS

2019 ◽  
Vol 43 (4) ◽  
Author(s):  
Fermin Gortari ◽  
Maximo Ivan Petruk Nowosad ◽  
Margarita Esther Laczeski ◽  
Andrea Onetto ◽  
Iliana Julieta Cortese ◽  
...  
Keyword(s):  
Positive Relationship ◽  
Yerba Mate ◽  
Ex Vitro ◽  
High Radiation ◽  
Chemical Fertilizers ◽  
Trichoderma Sp ◽  
Growth Promoting ◽  
Chemical Products ◽  
Radiation Conditions ◽  
Rooting Capacity

ABSTRACT The production of yerba mate seedlings through seeds has several limitations, which can be overcome by ex vitro vegetative propagation techniques such as the mini-cuttings, in which it is usually necessary to use synthetic chemical fertilizers and fungicides. However, there is a tendency towards sustainable agriculture, using biofertilizers (growth-promoting bacteria) and biocontrollers (Trichoderma sp.). Therefore, the objectives of this work were to evaluate the effect of biofertilizers on the production of mini-cuttings from yerba mate mini-stumps; as well as the effect, of biocontrollers on survival and rooting capacity of mini-cuttings. Strains of Bacillus sp. and Trichoderma asperelloides of yerba mate were used under two radiation conditions. There was a positive relationship between the availability of radiation and the production of mini-cuttings and the rooting capacity. All the mini-stumps sprouted regardless of treatments. The largest production of viable mini-cuttings occurred in a situation of high radiation and fertilization; while the treatments with growth-promoting bacteria and high radiation had intermediate values. The mini-cuttings inoculated with Trichoderma asperelloides had higher rooting percentage, greater number and length of roots than the mini-cuttings treated with fungicide. Therefore, we demonstrated that the use of chemical products can be replaced by biological ones and achieves acceptable yields.

Effect of environmental conditions on growth and rubber production of guayule (Parthenium argentatum)

1985 ◽  
Vol 36 (2) ◽  
pp. 285 ◽  
Author(s):  
RW Downes ◽  
ML Tonnet
Keyword(s):  
High Temperature ◽  
Dry Matter ◽  
Dry Matter Yield ◽  
Parthenium Argentatum ◽  
Rubber Content ◽  
High Radiation ◽  
Unit Leaf ◽  
Matter Production ◽  
Radiation Conditions ◽  
Cool Conditions

Nine lines of guayule were grown in the field near Narrabri and Canberra. Rubber percentage and dry matter production were estimated after four years' growth. Although dry matter yield per plant was comparable in the two locations, the rubber content was higher at Narrabri. Rubber percentage was greater after winter than after summer, indicating that cool conditions were favourable for rubber accumulation. This was supported in phytotron studies where rubber percentage was much higher at 15/10 than 24/19�C day/night temperatures. In contrast, elongation of shoots was promoted by high temperature, high radiation conditions. In a phytotron study guayule transpired substantially less than wheat per unit leaf area. The agronomic consequences of these findings are discussed.

The case study of a photovoltaic plant located at the university of L’Aquila: An economic analysis

2021 ◽  
Vol 278 ◽  
pp. 123561 ◽  
Author(s):  
Idiano D’Adamo ◽  
Filippo de Monte ◽  
Francesco Ferella ◽  
Massimo Gastaldi
Keyword(s):  
Economic Analysis ◽  
Photovoltaic Plant ◽  
The University

scholarly journals Analyzing Profitability and Discount Rates for Solar PV Plants. A Spanish Case

2020 ◽  
Vol 12 (8) ◽  
pp. 3157 ◽  
Author(s):  
Inmaculada Guaita-Pradas ◽  
Ana Blasco-Ruiz
Keyword(s):  
Discount Rate ◽  
Power Plants ◽  
Solar Power ◽  
Renewable Energy Sources ◽  
Critical Factor ◽  
Legal Framework ◽  
Capital Asset Pricing ◽  
Solar Pv ◽  
Photovoltaic Plant ◽  
Radiation Conditions

The widespread use of renewable energy sources and the growing concern about climate change, together with Spain’s exceptional weather and solar radiation conditions, have led to an increase in the use of photovoltaics for energy production in the country. Solar power generation has been tightly regulated, although the legal framework has changed frequently over the years. When assessing the potential financial performance of any business venture, legal as well as financial aspects must be considered, but a critical factor is the discount rate used, which must reflect the company’s capital cost. Other factors are the period of interest, the firm’s activity, market risk, and the level of debt of firms in the sector. The main objective of this study is thus to estimate the discount rate for companies using photovoltaics to produce solar power. We calculate it by employing two financial techniques: capital asset pricing model and historical return analysis. We then evaluate the investment in a photovoltaic plant with a capacity of 5000 kW located in eastern Spain, assuming it started its activity in different years which coincide with changes in the regulatory framework. The results show the relevance of the initial outlay costs for the profitability of photovoltaic power plants.

scholarly journals Survival of Radioresistant Bacteria on Europa’s Surface after Pulse Ejection of Subsurface Ocean Water

Geosciences ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 9 ◽  
Author(s):  
Anatoly Pavlov ◽  
Vladimir Cheptsov ◽  
Denis Tsurkov ◽  
Vladimir Lomasov ◽  
Dmitry Frolov ◽  
...  
Keyword(s):  
Vacuum Chamber ◽  
Deinococcus Radiodurans ◽  
Radiation Environment ◽  
Ocean Water ◽  
High Radiation ◽  
Viable Cells ◽  
Subsurface Ocean ◽  
Temperature And Pressure ◽  
Radiation Conditions ◽  
Accumulated Dose

We briefly present preliminary results of our study of the radioresistant bacteria in a low temperature and pressure and high-radiation environment and hypothesize the ability of microorganisms to survive extraterrestrial high-radiation environments, such as the icy surface of Jupiter’s moon, Europa. In this study, samples containing a strain of Deinococcus radiodurans VKM B-1422T embedded into a simulated version of Europa’s ice were put under extreme environmental (−130 °C, 0.01 mbar) and radiation conditions using a specially designed experimental vacuum chamber. The samples were irradiated with 5, 10, 50, and 100 kGy doses and subsequently studied for residual viable cells. We estimate the limit of the accumulated dose that viable cells in those conditions could withstand at 50 kGy. Combining our numerical modelling of the accumulated dose in ice with observations of water eruption events on Europa, we hypothesize that in the case of such events, it is possible that putative extraterrestrial organisms might retain viability in a dormant state for up to 10,000 years, and could be sampled and studied by future probe missions.

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