Energy and economic efficiency performance assessment of a 28 kWp photovoltaic grid-connected system under desertic weather conditions in Algerian Sahara

2019 ◽  
Vol 143 ◽  
pp. 1318-1330 ◽  
Author(s):  
Nordine Sahouane ◽  
Rachid Dabou ◽  
Abderrezzaq Ziane ◽  
Ammar Neçaibia ◽  
Ahmed Bouraiou ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Economic Efficiency ◽  
Weather Conditions ◽  
Algerian Sahara ◽  
Efficiency Performance

scholarly journals ECONOMIC EFFICIENCY OF CONSTRUCTION OF CLUSTER OIL TREATMENT SITES IN THE FAR NORTH CONDITIONS

2020 ◽  
Vol 70 (4/2020) ◽  
pp. 95-106
Author(s):  
V. V. Holodkova ◽  
◽  
A. B. Titov ◽  
J. V. Rjabkin ◽  
Keyword(s):  
Development Strategy ◽  
Economic Efficiency ◽  
Oil And Gas ◽  
Cost Savings ◽  
Weather Conditions ◽  
Gas Field ◽  
Innovative Technologies ◽  
Far North ◽  
Oil And Gas Fields ◽  
Gas Fields

The development of oil and gas fields, especially in the Far North, which are caused by complex climatic, geological and geocryological conditions, requires the introduction of innovative technologies. Today, a common option for the development of oil treatment fields is to organize them according to the cluster principle. Providing efficient access to cluster oil treatment is one of the key tasks in the development strategy of the Northern territories of Russia. The article focuses on evaluating the efficiency of the introduction of innovative technologies in the construction of road surfaces in the difficult conditions of the Far North using nanofibrobeton. It is proposed to use a special very light concrete or cellular gas-fiber concrete, which is a dry mixture of non-autoclave production, which is delivered dry to the construction site and only diluted with water directly on site in the volume necessary for a specific operation, after which it is poured into the monolith on the spot. When building access roads when creating an oil and gas field, it is necessary not only to create access roads, but also paths that connect the objects of the field with each other. The use of light concrete in creating access roads, as well as paths that connect the objects of the field with each other, has a number of advantages, especially in terms of low weight and strength. In addition, this coating protects the base from bad weather conditions. This paper presents a comparative calculation of the economic efficiency of using various road construction technologies in these conditions. A detailed overview of the existing tools for evaluation the capital investments, taking into account the time factor, is presented. The specifics of the investment evaluation of the project for the use of nanofibro-concrete for the development of oil and gas fields is a significant service life of the road surface and, consequently, cost savings for current and major repairs.

ADAMA-II wind farm performance assessment in comparison to feasibility study

2021 ◽  
pp. 0309524X2110351
Author(s):  
Abeba Debru ◽  
Mulu Bayray ◽  
Marta Molinas
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Performance Assessment ◽  
Feasibility Study ◽  
Energy Production ◽  
Wind Farm ◽  
Weather Conditions ◽  
Turbine Generators ◽  
Wind Turbine Generators

The objective of this paper was to assess the performance of the Adama-II Wind Farm in comparison to the feasibility study. Using 1-year mast data, the site potential was reassessed by WAsP software and the performance of wind turbine generators was assessed by 2 years of SCADA data. The obtained mean annual wind speed and power density were 7.75 m/s, and 462 W/m2 while in the feasibility study, 9.55 m/s, and 634.6 W/m2, which resulted in 18.8%, and 27.1% deviations respectively. The prevailing and secondary wind directions obtained were ENE and NE with 35.7% and 19.1% while, in the feasibility study, ENE with 36.5% and E with 17.3%. From the SCADA data, the Capacity factor, Annual Energy Production (AEP), and Availability of wind turbines were determined as 30.5%, 398 GWh, and 95.1%. The reasons for the deviation were difference in long-term correction data and weather conditions during study period.

scholarly journals Effects of fertilization and weather condition on grass stand composition changes of Sanguisorba–Festucetum comutatae association

2006 ◽  
Vol 54 (4) ◽  
pp. 61-70
Author(s):  
Jiří Skládanka ◽  
František Hrabě ◽  
H. Macháčková
Keyword(s):  
Economic Efficiency ◽  
Nitrogen Fertilization ◽  
Weather Condition ◽  
Weather Conditions ◽  
Festuca Rubra ◽  
Grass Stand ◽  
Ranunculus Acris ◽  
Composition Changes ◽  
Pk Fertilization ◽  
Npk Fertilization

The paper works at fertilization influence and weather conditions on the stand composition of Sanguisorba–Festucetum comutatae association. Paper evaluations the economic efficiency of NPK fertilization too. The monitor grass stand is situated in the Bohemian–Moravian Highlands at an altitude 553 m a.s.l. Non-fertilization grass stand, grass stand fertilization with PK, grass stand fertilization with 90 kg ha–1 N+PK, grass stand fertilization with 180 kg ha–1 N+PK were compared. Proportion of component arts and agro botanic categories in the take away fodder were monitored. In the paper are evaluated years 2003–2005. Precipitation subnormal (661 mm) was year 2003. Supernormal precipitations (852 mm, respectively 861 mm) were years 2004 and 2005. The grass proportion was by all fertilization variants higher in the years 2004 and 2005. The herb proportion was higher in the year 2003. The grasses dominated most of all by the fertilization grass stand with 180 kg ha–1 N + PK, especially Alopecurus pratensis L. By the non-fertilization grass stand dominated Festuca rubra L. Its proportion was by the non-fertilization grass stand significant (P<0.05) higher than fertilization grass stands. The herbs dominated by non-fertilization grass stand. Significant (P<0.05) higher proportion was first of all by Carex ssp. and Ranunculus acris L. Bistorta major S. F. GRAY was represented in the first instance by the nitrogen fertilization grass stand but difference between non-fertilization grass stand and fertilization grass stands was not statistic significant. Most legumes were by the PK fertilization grass stand. Trifolium repens L. was dominated. Significant (P<0.05) higher proportion was by the PK fertilization grass stand. The PK fertilization merged as effective. Coefficient of economic efficiency was 2.04 and profits 1 653 Kč t–1.

scholarly journals Testing of herbicidal systems for maize cultivation in the Steppe of Ukraine

2021 ◽  
pp. 32-36
Author(s):  
V. Sudak ◽  
A. Horbatenko ◽  
S. Semenov ◽  
А. Kulyk
Keyword(s):  
Economic Efficiency ◽  
Plant Protection ◽  
Weather Conditions ◽  
Maize Yield ◽  
Inhibitory Effect ◽  
Wetting Agent ◽  
Combined System ◽  
Maize Production ◽  
Weed Infestation ◽  
Favorable Weather

Goal. To determine the agrarian and economic efficiency of different technological systems for herbicidal protection of maize depending on the weed harmfulness level and weather conditions. Methods. Field experiment — for the weeds and maize yield accounting, and calculation method — for determining of the technical and economic efficiency of herbicide systems. Results. We recorded a significant decrease in the inhibitory effect of soil herbicides without precipitation, at elevated air temperature and hot dry wind in the first 5—7 days after their application. Also we specified the best pre-emergence herbicide Acris SE containing the active ingredients: Dimethenamid P (280 g/l) + Terbuthylazine (250 g/l). The number of weeds was indicated according to the experiment variants before spraying crops and 21 days after the application of toxicants. The technical and economic efficiency of combined (pre-emergence + post-emergence herbicides) and mixture of post-emergence products for protection systems of maize was determined. Conclusions. Under arid conditions, within 5—7 days after the application of pre-emergence herbicides (in 2018, the average background weed infestation of crops — 37 pcs/m2), the chemical plant protection system based on a tank mixture of post-emergence herbicides was ahead in terms of technical efficiency, yield and profitability grain production: Frontier Optima CE (Dimethenamid, 720 g/l) + Stellar RK (Topramezone, 50 g/l + Dicamba, 160 g/l) + Metolat wetting agent. The manifestation of soil herbicide phytotoxicity in favorable weather (in 2019—2020, background weed infestation of crops 129—147 pcs/m2) was more effective when using a combined system for controlling harmful species in the maize production technology: Dual Gold KE (S-metolachlor, 960 g/l) — before sowing + Stellar RK (Topramezone, 50 g/l + Dicamba, 160 g/l) + Metolat wetting agent — post emergence application. The best pre-emergence chemical product was Acris SE (Dimethenamid P, 280 g/l + Terbuthylazine, 250 g/l).

Energy performance assessment of a polygeneration plant in different weather conditions through simulation tools

2016 ◽  
Vol 124 ◽  
pp. 7-18 ◽  
Author(s):  
S. Soutullo ◽  
L.A. Bujedo ◽  
J. Samaniego ◽  
D. Borge ◽  
J.A. Ferrer ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Weather Conditions ◽  
Energy Performance ◽  
Simulation Tools

scholarly journals The influence of weather factors on the efficiency of malt barley production

2020 ◽  
Vol 67 (6) ◽  
pp. 7-17
Author(s):  
V. Kuzina
Keyword(s):  
Economic Efficiency ◽  
System Analysis ◽  
Quality Management System ◽  
Negative Impact ◽  
Weather Conditions ◽  
Added Value ◽  
Material Base ◽  
Grain Products ◽  
Malt Barley

Cultivation of malt barley is the direction of production activity is intensively developing as a result of formation of raw material base for malt production in brewing industry by joint efforts of malt corporations-investors and agricultural enterprises. Modernized to European standards malt production in Ukraine required barley compliant with these quality standards and the mechanism of relations, based on the introduction of innovative technologies, completely subordinated to the cultivation of grain products competitive in quality and volume. Brewing barley quality, as the main component of its added value, is formed by metabolic processes occurring in the plant as an integrated result of biological, technological and climatic factors influence. However, the efficiency of production in some years does not meet the producer expectations and the funds invested in production due to the negative impact on the quality of grain products of the third of them. Therefore, the systematic investigation is carried out in accordance with the following chain: weather – technology – crop structure – quality – economic efficiency of production. The author analyzes in detail the decadal indicators of weather conditions, linking their impact on barley vegetation and formation of productivity and brewing quality. According to the results of volumetric system analysis, the meteorological factors of negative influence on the formation of brewing quality of barley grain and their optimal values for the realization of genetically determined potential are defined. By means of detailed synthesis of technological information concerning barley cultivation, obtained directly from producers and data from specialized laboratories for the brewing quality determination, calculations of economic efficiency of barley production for different areas of use due to the negative impact of hydrometeorological conditions during the current year are carried out. Finally, we conclude that the direction of production activities aimed at malt barley cultivation, despite weather conditions, remains economically attractive to farmers with risk diversification due to quality management system by improving technology and optimizing costs.

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