scholarly journals Price and value competitiveness of Ukrainian merchandise exports

2021 ◽  
Vol 2021 (2) ◽  
pp. 5-26
Author(s):  
Pustovoit Oleh ◽  
◽  
Keyword(s):  
Gas Turbines ◽  
Consumer Preferences ◽  
Export Price ◽  
Value Added ◽  
High Price ◽  
Economic Science ◽  
Steam Turbines ◽  
Water Steam ◽  
Price Competitiveness ◽  
Qualitative Changes

In economics, "competitiveness" remains a very general concept, and its use in applied research does not allow combining their results and making unambiguous conclusions. This process is also complicated by the fact that the concept is composite and has two components – the price competitiveness and the value competitiveness. The latter can serve as an indicator of qualitative changes in the economy. However, this aspect of competitiveness in developing countries is still underestimated by researchers. Therefore, it is safe to say that today there are no studies, which, with a high level of accuracy, can analyze the value competitiveness of exports in such countries. Economists usually focus their efforts on the analysis of export price competitiveness and one of its main factors, which is the exchange rate of the national currency. However, this approach has limited cognitive capabilities, because the emergence of new centers of global growth, such as China and India is impossible to explain, based only on the high price competitiveness of their exports. The article attempts to solve some accumulated problems in economic science. In particular, based on the results of the analysis of modern definitions of the concept of "competitiveness", the author proposes to expand its content, generalizing the level of conformity of goods (services) to consumer preferences of market participants. This conceptual position is used to deepen the understanding of the basic, value and price competitiveness of products. A method for assessing the dominant role of value (price) competitiveness of exports in ensuring its dynamics has been developed. According to the results of the of methodology, it was found that in Ukraine’s export markets, the cyclical process of alternating growth of value or price competitiveness of this country’s products is mostly interrupted. The reason for this is the high price competitiveness of raw material exports, which is mainly attained due to low wages in the economy. In international markets, value competitiveness is inherent in a relatively small number of product groups of Ukrainian products. These include: insulated wires, cables and other insulated electrical conductors; fiber optic cables; turbojet engines, turboprop and other gas turbines; weapons, ammunition, their parts and accessories; electric heating devices and apparatus; vessels intended for the carriage of persons or goods; tugs and pushers; parts of aircraft; cars for transportation of passengers, cargoes, including self-propelled ones; water steam turbines and other steam turbines; and women's and men's clothing. It is substantiated that from the point of view of finding a new strategy of economic growth for Ukraine, the most urgent issues are not those of intensifying export activities, but those of updating the composition of the largest export commodity groups. Leading positions among them should be occupied by goods with a large share of value added, and increased technological complexity and value competitiveness. The beginning of this process will mean the emergence of new qualitative changes in the economy, and the effectiveness of public policy of economic reform.

scholarly journals PRICE AND VALUE COMPETITIVENESS OF UKRAINIAN MERCHANDISE EXPORTS

2021 ◽  
Vol 2021 (2) ◽  
pp. 7-31
Author(s):  
Oleh Pustovoit ◽  
◽  
Keyword(s):  
Gas Turbines ◽  
Consumer Preferences ◽  
Export Price ◽  
Value Added ◽  
High Price ◽  
Economic Science ◽  
Steam Turbines ◽  
Water Steam ◽  
Price Competitiveness ◽  
Qualitative Changes

In economics, "competitiveness" remains a very general concept, and its use in applied research does not allow combining their results and making unambiguous conclusions. This process is also complicated by the fact that the concept is composite and has two components – the price competitiveness and the value competitiveness. The latter can serve as an indicator of qualitative changes in the economy. However, this aspect of competitiveness in developing countries is still disregarded by researchers. Therefore, it is safe to say that today there are no studies, which, with a high level of accuracy, can analyze the value competitiveness of exports in such countries. Economists usually focus their efforts on the analysis of export price competitiveness and one of its main factors, which is the exchange rate of the national currency. However, this approach has limited cognitive capabilities, because the emergence of new centers of global growth, such as China and India is impossible to explain, based only on the high price competitiveness of their exports. The article attempts to solve some accumulated problems in economic science. In particular, based on the results of the analysis of modern definitions of the concept of "competitiveness", the author proposes to expand its content, generalizing the level of conformity of goods (services) to consumer preferences of market participants. This conceptual position is used to deepen the understanding of the basic, value and price competitiveness of products. A method for assessing the dominant role of value (price) competitiveness of exports in ensuring its dynamics has been developed. According to the results of the of methodology, it was found that in Ukraine’s export markets, the cyclical process of alternating growth of value or price competitiveness of this country’s products is mostly interrupted. The reason for this is the high price competitiveness of raw material exports, which is mainly attained due to low wages in the economy. In international markets, value competitiveness is inherent in a relatively small number of product groups of Ukrainian products. These include: insulated wires, cables and other insulated electrical conductors; fiber optic cables; turbojet engines, turboprop and other gas turbines; weapons, ammunition, their parts and accessories; electric heating devices and apparatus; vessels intended for the carriage of persons or goods; tugs and pushers; parts of aircraft; cars for transportation of passengers, cargoes, including self-propelled ones; water steam turbines and other steam turbines; and women's and men's clothing. It is substantiated that from the point of view of finding a new strategy of economic growth for Ukraine, the most urgent issues are not those of intensifying export activities, but those of updating the composition of the largest export commodity groups. Leading positions among them should be occupied by goods with a large share of value added, and increased technological complexity and value competitiveness. The beginning of this process will mean the emergence of new qualitative changes in the economy, and the effectiveness of public policy of economic reform.

scholarly journals An Analysis of Consumer Preferences for Value-Added Seafood Products Derived from Crawfish

2002 ◽  
Vol 31 (2) ◽  
pp. 157-170 ◽  
Author(s):  
R. Wes Harrison ◽  
Timothy Stringer ◽  
Witoon Prinyawiwatkul
Keyword(s):  
Conjoint Analysis ◽  
Consumer Preferences ◽  
Value Added ◽  
Utility Functions ◽  
Ordered Probit ◽  
Probit Models ◽  
Seafood Products ◽  
Ordered Probit Models ◽  
Old Men

Conjoint analysis is used to evaluate consumer preferences for three consumer-ready products derived from crawfish. Utility functions are estimated using two-limit tobit and ordered probit models. The results show women prefer a baked nugget or popper type product, whereas 35- to 44-year-old men prefer a microwavable nugget or patty type product. The results also show little difference between part-worth estimates or predicted rankings for the tobit and ordered probit models, implying the results are not sensitive to assumptions regarding the ordinal and cardinal nature of respondent preferences.

An Optimization Design Platform for Fir-Tree Root and Groove for Steam Turbine

2018 ◽  
Author(s):  
Deqi Yu ◽  
Xiaojun Zhang ◽  
Jiandao Yang ◽  
Kai Cheng ◽  
Weilin Shu ◽  
...  
Keyword(s):  
Stress Concentration ◽  
Steam Turbine ◽  
Gas Turbines ◽  
High Speed ◽  
Optimization Design ◽  
Turbine Blades ◽  
Local Stress ◽  
Optimization Method ◽  
Steam Turbines ◽  
Geometry Configuration

Fir-tree root and groove profiles are widely used in gas turbine and steam turbine. Normally, the fir-tree root and groove are characterized with straight line, arc or even elliptic fillet and splines, then the parameters of these features were defined as design variables to perform root profile optimization. In ultra-long blades of CCPP and nuclear steam turbines and high-speed blades of industrial steam turbine blades, both the root and groove strength are the key challenges during the design process. Especially, in industrial steam turbines, the geometry of blade is very small but the operation velocity is very high and the blade suffers stress concentration severely. In this paper, two methods for geometry configuration and relevant optimization programs are described. The first one is feature-based using straight lines and arcs to configure the fir-tree root and groove geometry and genetic algorithm for optimization. This method is quite fit for wholly new root and groove design. And the second local optimization method is based on B-splines to configure the geometry where the local stress concentration occurs and the relevant optimization algorithm is used for optimization. Also, several cases are studied as comparison by using the optimization design platform. It can be used not only in steam turbines but also in gas turbines.

Compliant Plate Seals: Design and Performance Simulations

2012 ◽  
Author(s):  
Hrishikesh V. Deo ◽  
Ajay Rao ◽  
Hemant Gedam
Keyword(s):  
Gas Turbines ◽  
Tip Clearance ◽  
Outer Diameter ◽  
Aircraft Engines ◽  
Steam Turbines ◽  
Flow Rates ◽  
Cfd Models ◽  
Low Leakage ◽  
And Performance ◽  
Large Rotor

Compliant Plate Seals are being developed for various turbomachinery sealing applications including gas turbines, steam turbines, aircraft engines and oil & gas compressors. These seals consist of compliant plates attached to a stator in a circumferential fashion around a rotor. The compliant plates have a slot that extends radially inwards from the seal outer diameter, and an intermediate plate extends inwards into this slot from stator. This design is capable of providing passive hydrostatic feedback forces acting on the compliant plates that balance at a small tip–clearance. Due to this self–correcting behavior, this seal is capable of providing high differential pressure capability and low leakage within a limited axial span, and non–contact operation even in the presence of large rotor transients. CFD models have been developed to predict the leakage flow rates and hydrostatic lift and blowdown forces, and a design philosophy is proposed to predict the feedback phenomenon from the CFD results.

Reduction of Secondary Flow Effects in a Linear Cascade by Use of an Air Suction From the Endwall

1996 ◽  
Author(s):  
K. Funazaki ◽  
T. Endo ◽  
T. Tanuma
Keyword(s):  
Secondary Flow ◽  
Flow Rate ◽  
Pressure Measurement ◽  
Gas Turbines ◽  
Stagnation Pressure ◽  
Working Fluid ◽  
Steam Turbines ◽  
Linear Cascade ◽  
Oil Flow ◽  
Flow Effects

The objective of this study is to reduce secondary flow effects in a linear cascade by sucking the working fluid from the endwall. It is widely known that the secondary flow developed in a cascade has a significant impact on the cascade loss or blade erosion in steam turbines. Therefore, a number of studies have been made on the physics of the secondary flow and several devices to control the secondary flow, such as a fence, have been examined. In this study, considering the application to nozzles in gas turbines or steam turbines, the air suction approach is investigated for reducing the secondary flow effects. A suction slit is provided on the lower endwall of the cascade and a flow rate of the sucked air is controlled by adjusting the exit pressure of the slit. The effects of the suction upon the flow nearby the endwall and the secondary flow are observed through several flow visualizing techniques, for example an oil flow method or a tuft method. Furthermore, velocity and stagnation pressure measurement are conducted by a five-hole pressure tube. This clearly demonstrates the vorticity and loss profiles downstream of the cascade with and without the endwall suction.

Turning NGCC Into IGCC: Cycle Retrofitting Issues

2006 ◽  
Author(s):  
Juan Pablo Gutierrez ◽  
Terry B. Sullivan ◽  
Gerald J. Feller
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Power Plants ◽  
Combined Cycle ◽  
Integrated Gasification Combined Cycle ◽  
Water Steam ◽  
Power Block ◽  
Starting Point ◽  
Natural Gas Combined Cycle ◽  
Gas Plants

The increase in price of natural gas and the need for a cleaner technology to generate electricity has motivated the power industry to move towards Integrated Gasification Combined Cycle (IGCC) plants. The system uses a low heating value fuel such as coal or biomass that is gasified to produce a mixture of hydrogen and carbon monoxide. The potential for efficiency improvement and the decrease in emissions resulting from this process compared to coal-fired power plants are strong evidence to the argument that IGCC technology will be a key player in the future of power generation. In addition to new IGCC plants, and as a result of new emissions regulations, industry is looking at possibilities for retrofitting existing natural gas plants. This paper studies the feasibility of retrofitting existing gas turbines of Natural Gas Combined Cycle (NGCC) power plants to burn syngas, with a focus on the water/steam cycle design limitations and necessary changes. It shows how the gasification island processes can be treated independently and then integrated with the power block to make retrofitting possible. This paper provides a starting point to incorporate the gasification technology to current natural gas plants with minor redesigns.

scholarly journals Rank-Ordered Analysis of Consumer Preferences for the Attributes of a Value-Added Biofuel Co-Product

2020 ◽  
Vol 12 (6) ◽  
pp. 2363 ◽  
Author(s):  
Yejun Choi ◽  
Dayton M. Lambert ◽  
Kimberly L. Jensen ◽  
Christopher D. Clark ◽  
Burton C. English ◽  
...  
Keyword(s):  
Consumer Preferences ◽  
Value Added ◽  
Wood Waste ◽  
Biofuel Production ◽  
Energy Crop ◽  
Waste Wood ◽  
Consumer Demographics ◽  
A Value ◽  
Best Worst Scaling ◽  
Potential Market

Biochar is a co-product of the production of advanced biofuels that sequesters carbon when used as a soil amendment. Gardening consumers are a potential market for biochar and their purchase of biochar-amended products could provide biofuel producers with an additional revenue stream. To better understand this opportunity, preferences for the attributes of potting soils amended with biochar were elicited using a best-worst scaling experiment administered in a survey of 880 Tennessee households. The attributes analyzed were whether the biochar was produced in Tennessee, certified as biobased, a coproduct of biofuel production, and produced from food waste, wood waste, agricultural by-product, or a non-food energy crop feedstock. The effects of consumer demographics and attitudes on preferences for the biochar attributes were also estimated. We tested the independence of irrelevant alternative assumption using a structured covariance matrix designed specifically to the survey’s structure. The results suggest that the attributes most likely to influence favorably consumers are production from agricultural by-product or wood waste feedstock. On the other hand, the attributes least likely to entice consumers are biochar produced in Tennessee or produced as a co-product of renewable fuel.

Consumer preferences for local production and other value-added label claims for a processed food product

2011 ◽  
Vol 39 (3) ◽  
pp. 489-510 ◽  
Author(s):  
W. Hu ◽  
M. T. Batte ◽  
T. Woods ◽  
S. Ernst
Keyword(s):  
Consumer Preferences ◽  
Value Added ◽  
Food Product ◽  
Processed Food ◽  
Local Production

Coordinated Control of Gas and Steam Turbines for Efficient Fast Start-Up of Combined Cycle Power Plants

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Yasuhiro Yoshida ◽  
Kazunori Yamanaka ◽  
Atsushi Yamashita ◽  
Norihiro Iyanaga ◽  
Takuya Yoshida
Keyword(s):  
Thermal Stress ◽  
Steam Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Thermal Stresses ◽  
Control Method ◽  
Coordinated Control ◽  
Combined Cycle ◽  
Steam Turbines ◽  
Start Up

In the fast start-up for combined cycle power plants (CCPP), the thermal stresses of the steam turbine rotor are generally controlled by the steam temperatures or flow rates by using gas turbines (GTs), steam turbines, and desuperheaters to avoid exceeding the thermal stress limits. However, this thermal stress sensitivity to steam temperatures and flow rates depends on the start-up sequence due to the relatively large time constants of the heat transfer response in the plant components. In this paper, a coordinated control method of gas turbines and steam turbine is proposed for thermal stress control, which takes into account the large time constants of the heat transfer response. The start-up processes are simulated in order to assess the effect of the coordinated control method. The simulation results of the plant start-ups after several different cool-down times show that the thermal stresses are stably controlled without exceeding the limits. In addition, the steam turbine start-up times are reduced by 22–28% compared with those of the cases where only steam turbine control is applied.

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