Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 11
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

The purpose of this article was to discuss the use of adsorption chillers for waste heat recovery. The introduction discusses the need to undertake broader measures for the effective management of waste heat in the industry and discusses the benefits and technical problems related to heat recovery in industrial plants. In addition, heat sources for adsorption chillers and their application examples were described. The principle of operation of adsorption chillers is explained in the next chapter. Heat sources for adsorption chillers are indicated and their application examples are described. The above considerations have allowed the benefits and technical obstacles related to the use of adsorption chillers to be highlighted. The currently used adsorbents and adsorbates are discussed later in the article. The main part of the paper discusses the use of adsorption chillers for waste heat management in the glassworks. The calculations assumed the natural gas demand of 20.1 million m3 per year and the electricity demand of 20,000 MWh/year. As a result of conducted calculations, a 231 kW adsorption chiller, ensuring the annual cold production of 2,021 MWh, was selected. The economic analysis of the proposed solution has shown that the investment in the adsorption chiller supplied with waste heat from the heat recovery system will bring significant economic benefits after 10 years from its implementation, even with total investment costs of PLN 1,900,000. However, it was noted that in order to obtain satisfactory economic results the production must meet the demand while the cost of building a heat recovery system shall not exceed PLN 1 million.

Go to article

Authors and Affiliations

Jan Kuchmacz
Artur Bieniek
Łukasz Mika
ORCID: ORCID
Download PDF Download RIS Download Bibtex

Abstract

Based on the theory of computer vision, a new method for extracting ore from underground mines is proposed. This is based on a combination of RGB images collected by a color industrial camera and a point cloud generated by a 3D ToF camera. Firstly, the mean-shift algorithm combined with the embedded confidence edge detection algorithm is used to segment the RGB ore image into different regions. Secondly, the effective ore regions are classified into large pieces of ore and ore piles consisting of a number of small pieces of ore. The method applied in the classification process is to embed the confidence into the edge detection algorithm which calculates edge distribution around ore regions. Finally, the RGB camera and the 3D ToF camera are calibrated and the camera matrix transformation of the two cameras is obtained. Point cloud fragments are then extracted according to the cross-calibration result. The geometric properties of the ore point cloud are then analysed in the subsequent procedure.
Go to article

Authors and Affiliations

Feng Jin
1
ORCID: ORCID
Kai Zhan
2
Shengjie Chen
2
Shuwei Huang
2
ORCID: ORCID
Yuansheng Zhang
2

  1. BGRIMM Technology Group University of Science and Technology Beijing, China
  2. BGRIMM Technology Group, China
Download PDF Download RIS Download Bibtex

Abstract

A relatively rich assemblage of starfish is recognised from the talus facies of an Upper Jurassic (lower Kimmeridgian) biohermal, sponge-cyanobacterial build-up from the Wapienno/Bielawy succession exposed in a salt-dome anticline in Kuyavia region, north-central Poland. The paper presents 8 taxa belonging to 4 genera (one new to science): Boxaster gen. nov., Noviaster Valette, 1929, Tylasteria Valette, 1929, Valettaster Lambert, 1914, and 4 families: Astropectinidae Gray, 1840, Goniasteridae Forbes, 1841, Sphaerasteridae Schöndorf, 1906 and Stauranderasteridae Spencer, 1913. Only a very few representatives of some of these taxa have formerly been reported from the Jurassic of Poland. Two species are new: Valettaster planus sp. nov. and Boxaster wapienensis gen. et sp. nov. The Jurassic starfish assemblage recognised from the Wapienno/Bielawy succession is interpreted as an offshore starfish fauna with the admixture of allochtonous shallow-water taxa. The lithology of the source deposits indicates their transport by storm agitation and/or mass movements. This fact strongly influenced the preservation state, all collected plates being disarticulated and most of them abraded.
Go to article

Authors and Affiliations

Michał Loba
1
Urszula Radwańska
2

  1. Polish Academy of Sciences Museum of the Earth in Warsaw, Aleja na Skarpie 20/26, 27, 00-488 Warszawa
  2. Faculty of Geology, University of Warsaw, Żwirki i Wigury 93, 02-089 Warszawa, Poland
Download PDF Download RIS Download Bibtex

Abstract

In 1920 qualitative and quantitative benthos samples collected in Barents Sea sublittoral in the years 1951-1983 154 species, 77 genera and 30 families of Amphipoda Gammaridea were identified. Species diversity was highest among the Lysianassidae, Oedicerotidae, Ampcliscidae, Calliopiidae and Pleustidae. Ampelisca eschrichti clearly dominated the material. This same species, plus Haploops setosa and Anonyx nugax were both the most frequently occurring and most numerous species. The distribution of amphipods in the Barents Sea sublittoral varies both in diversity and numbers by region, depth, sediments and water temperature. Zoogeographical changes are discussed in the present paper. Altogether 331 species of amphipods have been hitherto collected in the Barents Sea, of which 317 species, 126 genera and 39 families belong to the suborder Gammaridea.

Go to article

Authors and Affiliations

Valery Bryazgin
Download PDF Download RIS Download Bibtex

Abstract

In this article the author attempts to define the specificity of the tools for development planning at the local level in the context of: institutional resources of community (gmina) (and means of strengthening them), models of public management as well as the specifics of the Polish public administration system and its ensuing dysfunctions. These dysfunctions rely mainly on a limited awareness of the need to create mechanisms of coordination for: socio-economics, spatial and financial planning. These factors contribute to a decrease in the effectiveness of measures for the development of communities. Socio-economic planning answers the question: WHAT we want to do in the community; spatial planning: WHERE we would like to carry out certain activities, and financial planning: HOW MUCH it will cost and where the financial sources are. We can see the theoretical causal links between the areas of development planning, therefore, the main purpose of this article is to offer conceptual framework and a relevant case study of Kraków serving as its validation attempt.

Go to article

Authors and Affiliations

Michał Kudłacz
Download PDF Download RIS Download Bibtex

Abstract

The EU member states have implemented excise duties on fuel and electricity according to the EU Energy Tax Directive. The purpose of these measures is to motivate a reduction in energy consumption by internalizing external costs of energy. The taxes on energy have success in inciting energy savings. Simultaneously, the price levels of energy in the EU member states have increased to levels significantly higher compared to other countries in the region and the world. The price increase is the result of a cumulative effect of excise duties and other taxes and mechanisms including feed-in tariffs and quota policies. While the Energy Tax Directive gives the member states a level of freedom in setting the exact duty rates, the minimal rates enforced on all member states are relatively high. The policy intends to limit competition between the states on low energy prices and arbitrage trading between countries. We examine the purchasing power for energy products relative to the per capita GDP for a wide set of countries countries within the EU and in the rest of the world. We can identify several groups or clusters of countries based on their GDP per capita and energy prices. The new member states of the EU face a unique combination of low or moderate GDP per capita and very high energy prices. Their relative purchasing power for energy is degraded to levels comparable or lower than the purchasing power in developing countries with significantly lower GDP per capita and underdeveloped energy infrastructure. The calibration of energy taxation in the EU at high price levels suitable for Western European economies with high per capita GDP is leading to strong negative social effects and increasing poverty in Eastern European member states. The current implementation of these policies does not recognize to a sufficient extent income levels, regional social inequalities, and the low price elasticity of demand for energy.

Go to article

Authors and Affiliations

Yavor Kolarov
Download PDF Download RIS Download Bibtex

Abstract

The phenomenon of protectionism in the international merchant marine has a long history. The USA is one of severa/ countries that has, for many years, supported its national merchant fleet using various means. The author presents the history of protectionist US merchant marine legislation, beginning with President Washington and the first American Congress. The outline of these practices in the USA demonstrates that legislative acts regarding cargo provisions have the longest history. The Merchant Marine Act of 1936 played a fundamental role in the development of the financial aid system for the US merchant fleet. Additionally, tax deductions designed to stimulate investment were available to ship owners. US federal government loan guarantees for American ship owners are one of the most universal forms of indirect support for the private merchant fleet. Other legislative means for supporting the national merchant fleet include war insurance, special arrangements, and the financing of maritime schools. The measures taken to support the interests of its own fleet have not proven to be effective. The tonnage of the fleet registered under the American flag has not increased significantly.
Go to article

Authors and Affiliations

Tadeusz Szczepaniak
Download PDF Download RIS Download Bibtex

Abstract

In the paper presented are the results of calculations using authors own model to predict heat transfer coefficient during flow boiling of carbon dioxide. The experimental data from various researches were collected. Calculations were conducted for a full range of quality variation and a wide range of mass velocity. The aim of the study was to test the sensitivity of the in-house model. The results show the importance of taking into account the surface tension as the parameter exhibiting its importance in case of the flow in minichannels as well as the influence of reduced pressure. The calculations were accomplished to test the sensitivity of the heat transfer model with respect to selection of the appropriate two-phase flow multiplier, which is one of the elements of the heat transfer model. For that purpose correlations due to Müller-Steinhagen and Heck as well as the one due to Friedel were considered. Obtained results show a good consistency with experimental results, however the selection of two-phase flow multiplier does not significantly influence the consistency of calculations.

Go to article

Authors and Affiliations

Dariusz Mikielewicz
Blanka Jakubowska
Download PDF Download RIS Download Bibtex

Abstract

The aim of this article is to offer an in‑depth analysis of the quality of the basic act of phenomenological cognition. By juxtaposing arguments by Jan Patočka and Paul Ricoeur, the author concludes that neither negation (as Patočka claims) nor affirmation (as Ricoeur believes) but only fundamental questioning contributes to the development of fundamental phenomenological experience. From this perspective, the ‘thing of thinking’ is neither non‑Being (nothingness), nor Being, but the attitude of inquisitiveness. Philosophical acts of affirmation and negation, the correlates of which are Being and non‑Being, are responses to the basic experience of questioning. Persistence in the belief that questions have a leading role in philosophy strengthens the position of written communication as the proper medium of expression in philosophical inquiry.
Go to article

Authors and Affiliations

Daniel Roland Sobota
1
ORCID: ORCID

  1. Polska Akademia Nauk, Instytut Filozofii i Socjologii, ul. Nowy Świat 72, 00-330 Warszawa
Download PDF Download RIS Download Bibtex

Abstract

Stanisław Wyspiański (1869–1907) was the Polish dramatist, the poet, besides the illustrator and the painter, one of the best known artist of the Young Poland movement. His journey to Europe (particulary to Paris) became very important experience in his life. He discovered the value of loneliness, he had to be alone – as an artist and as a man. He was called “a hermit from Cracow” and for this reason his genius was not always appreciated. However, at the end of life, Wyspiański undergoes a significant transformation: he feels a strong connection to community, as a member of the nation and society, as well as a host.

Go to article

Authors and Affiliations

Jan Tomkowski
Download PDF Download RIS Download Bibtex

Abstract

This article deals with the problem of representation of the nuclear holocaust in literary theory (in the context of deconstruction theory) and in some literary works (usually dubbed Apocalyptic and Post-Apocalyptic fiction), i.e. John Hersey's Hiroshima, Hara Tamiki's Summer Flowers, Ibuse Masuji's The Crazy Iris, and Stanisław Lem's novel His Master's Voice and his short story Man from Hiroshima. The problem of representing a calamitous event is discussed here in connection with recent debates on the nature and status of testimony (especially Dori Laub's witness and testimony studies).
Go to article

Bibliography

●Bereś S., Tako rzecze… Lem. Ze Stanisławem Lemem rozmawia Stanisław Bereś, Kraków 2002.
●Boruszkowska I., Koza M., Ostateczna de(kon)strukcja. Nuklearna apokalipsa Derridy, „Czas Kultury”, nr 5, 2014.
●Gajewska A., Zagłada i gwiazdy. Przeszłość w prozie Stanisława Lema, Poznań 2016.
●Hersey J., Hiroszima, przeł. J. Łoziński, Poznań 2013.
●Hersey J., Hiroszima, przeł. Józef Wittlin, Warszawa 1948.
●Hundorowa T., Czarnobyl, nuklearna apokalipsa i postmodernizm, przeł. I. Boruszkowska, „Teksty Drugie” 2014, nr 6.
●Jarzębski J., Wszechświat Lema, Kraków 2002.
●Kato A., Recepcja Holokaustu w Japonii w perspektywie porównawczej: Auschwitz – Nankin – Hiroszima, „Zagłada Żydów. Studia i materiały. Pismo Centrum Badań nad Zagładą Żydów Instytutu Filozofii i Socjologii Polskiej Akademii Nauk”, nr 13, 2017.
●Laub D., Zdarzenie bez świadka: prawda, świadectwo oraz ocalenie, „Teksty Drugie”, nr 5, 2007.
●Lem S., Człowiek z Hiroszimy, [w:] Człowiek z Marsa. Opowiadania młodzieńcze. Wiersze, Warszawa 2009.
●Lem S., Głos Pana, Kraków 2016.
●Markowski M.P., O reprezentacji, [w:] Kulturowa teoria literatury. Główne pojęcia i problemy, red. M.P. Markowski, R. Nycz, Kraków 2006.
●Marzec A., Krytyka nuklearna. Myśl w przededniu apokalipsy, „Czas Kultury”, nr 1, 2014.
●Masuji I., Irys, [w:] Irys – opowiadania japońskie, przeł. A. Gostyńska, Warszawa 1960.
●Melanowicz M., Literatura japońska. Proza XX wieku, Warszawa 1994.
●Po Czarnobylu. Miejsce katastrofy w dyskursie współczesnej humanistyki, I. Boruszkowska, K. Linianowicz, A. Grzemska, P. Krupa, Kraków 2017.
●Rothberg M., Pamięć wielokierunkowa. Pamiętanie Zagłady w epoce dekolonizacji, przeł. Katarzyna Bojarska, Warszawa 2015.
●Szarecki A., Ciało w stanie rozpadu. Doświadczenie bomby atomowej w relacjach hibakusha, „Przegląd Humanistyczny” 2017, nr 1.
Go to article

Authors and Affiliations

Rafał Jakub Skowroński
1
ORCID: ORCID

  1. Instytut Filologii Polskiej Uniwersytetu Gdańskiego, Gdańsk

This page uses 'cookies'. Learn more