Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 6
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

The constant increase in the popularity of renewable energy systems allows residential building users to apply solutions leading to the diversification of the energy supply. The use of RES systems in residential buildings not only contributes to a higher level of environmental care, but also significantly and measurably improves the energy efficiency of the facility. Using hybrid systems allows the supply to be reduced or eliminated from conventional energy sources. The article presents common layouts of renewable energy systems, which are successfully used in residential buildings. It also shows the impact of such systems on the amount of savings achieved in the use of energy from external or conventional sources. In residential buildings, the possibility of energy generation in the form of electricity and heat is dependent on many factors that determine the type and size of the systems used to obtain energy from renewable sources. We should assume the further and continuous development of RES, which will increase the share of electricity and heat produced in households. Technological development, decreasing prices of equipment and components used for the installation of green electricity generation systems will be a conducive factor for increasing the popularity of RES systems, not only for residential buildings but also for other types of buildings. The article also points out the economic aspect of the RES systems application. It presents the positive impact of RES installations on the environment and estimates the average time of financial reimbursement. The economic analysis concerns individual systems of renewable energy systems used in residential buildings.

Go to article

Authors and Affiliations

Sławomir Sowa
Download PDF Download RIS Download Bibtex

Abstract

Energy security is one of the most frequently analysed phenomena in the energy markets. Great variety of scientifc efforts should have indicated clear definition of the phenomenon. However, those studies highlighted more than 80 different definitions of what energy security really is. Due to the fact, that energy security is analyzed by different scientific disciplines, studies have provided a comperehensive reflection on the phenomenon.

The main objective of this paper is of the theoretical nature and focuses on showing energy security externalities. Author delivers an integrative review focusing on existing literature referring to the analyzed phenomena. Energy security is though studied only from the perspective of economics therefore interdisciplinary studies are out of the study scope. The reason for such scientific procedure stem from a belief that each discipline approach is different in terms of concepts, research methods and though results that are obtained. Therefore without undermining high value of interdisciplinary approaches to energy security, author decided to concentrate solely on economic perspective, which in energy security studies seems to be underestimated. Such approach in author’s belief helps achieve theoretical clarity of the below given analysis.

Presented paper is of the theoretical nature and focuses on showing energy security externalities. Critical literature review shows the literature mainstream in which energy security externalities are

Go to article

Authors and Affiliations

Honorata Nyga-Łukaszewska
Download PDF Download RIS Download Bibtex

Abstract

In this paper a mathematical model enabling the analysis of the heat-flow phenomena occurring in the waterwalls of the combustion chambers of the boilers for supercritical parameters is proposed. It is a one-dimensional model with distributed parameters based on the solution of equations describing the conservation laws of mass, momentum, and energy. The purpose of the numerical calculations is to determine the distributions of the fluid enthalpy and the temperature of the waterwall pipes. This temperature should not exceed the calculation temperature for particular category of steel. The derived differential equations are solved using two methods: with the use of the implicit difference scheme, in which the mesh with regular nodes was applied, and using the Runge-Kutta method. The temperature distribution of the waterwall pipes is determined using the CFD. All thermophysical properties of the fluid and waterwall pipes are computed in real-time. The time-spatial heat transfer coefficient distribution is also computed in the on-line mode. The heat calculations for the combustion chamber are carried out with the use of the zone method, thus the thermal load distribution of the waterwalls is known. The time needed for the computations is of great importance when taking into consideration calculations carried out in the on-line mode. A correctly solved one-dimensional model ensures the appropriately short computational time.

Go to article

Authors and Affiliations

Wiesław Zima
Sławomir Grądziel
Artur Cebula
Download PDF Download RIS Download Bibtex

Abstract

The press never featured prominently in the private diaries of Michał Römer (1880–1945), a Polish-Lithuanian academic and politician (and every now and then editor and journalist). None-theless the diaries, which he kept for 34 years, are a veritable mine of information about the multilingual press scene in Wilno, especially between 1911 and 1915, when he was an important player in that field. For the following years and decades, down to 1945, his diaries re-main an important sources as he continued to watch, analyze and comment, in his own way, on the dramatic shifts in Poland’s and Lithuania’s multilingual press market, a process driven by political and military upheavals of 20th century.
Go to article

Bibliography

Römer M., Dzienniki, t. I –VI, Warszawa 2017–2018.
Bibliografia historii Polski XIX i XX wieku, t. III: 1865–1918, wol. I, Warszawa 2000, wol. III, Warszawa 2017.
Jurkowski R., „Gazeta Wileńska” i „Głos Kijowski” (Z dziejów polskiej prasy radykalno-‑liberalnej na Litwie i Ukrainie w 1906 roku), „Kwartalnik Historii Prasy Polskiej” 1987, nr 4, s. 59–84.
Paczkowski A., Prasa polska w latach 1918–1939, Warszawa 1980.
Sawicki J., Michał Römer a problemy narodowościowe na ziemiach byłego Wielkiego Księstwa Litewskiego, Toruń 1998.
Sawicki J., „Przegląd Wileński” w latach 1911–1915. Cz. 1–2, „Zapiski Historyczne” 1994, z. 4, s. 41–56; 1995, z. 1, s. 30–62.
Smalianczuk A., W poszukiwaniu idei narodowej. „Krajowość” początku XX w. jako próba ideologii „Polaków litewskich”, „Sprawy Narodowościowe. Seria Nowa” 2017, nr 49, s. 1–11.
Solak Z., Między Polską a Litwą. Życie i działalność Michała Römera 1880–1920, Kraków 2004.
Zienkiewicz T., Informacje o litewskim życiu kulturalnym w „Gazecie Wileńskiej” (1906), [w:] W kręgu kultury litewskiej, red. nauk. W. Piłat, Olsztyn 1991, s. 117–127.
Žurnalistikos enciklopedija, Vilnius 1997.
Go to article

Authors and Affiliations

Krzysztof Woźniakowski
1
ORCID: ORCID

  1. Uniwersytet Pedagogiczny im. KEN, ul. Podchorążych 2, PL 30-084 Kraków (Prof. em.)
Download PDF Download RIS Download Bibtex

Abstract

The paper presents the usefulness of the common sense psychology, as well as of the knowledge acquired in various traditions of academic psychology in historical interpretations.
Go to article

Authors and Affiliations

Maciej Dymkowski
ORCID: ORCID
Download PDF Download RIS Download Bibtex

Abstract

The article presents results of a survey of attitudes toward experts’ recommendations in fighting COVID-19 pandemic, scientists and science in general, and academic freedom in Poland, and discusses them in the context of the on-going pandemic as well as local developments in Poland. The global crisis triggered by the coronavirus pandemic highlighted the subtle, yet vital social role played by science, which in normal circumstances does not present itself that vividly. This, paradoxically, comes at a time, when the status of science and scientific freedom is disputed in the Polish public debate. The internet survey was conducted by the Institute of Political Studies of the Polish Academy of Sciences in April 2021 on a sample of Poles aged 18–65.
Go to article

Authors and Affiliations

Ireneusz Sadowski
1
Marta J. Kołczyńska
1
Anna Ciepielewska-Kowalik
1
Bogdan W. Mach
1
ORCID: ORCID

  1. Instytut Studiów Politycznych PAN, Warszawa

This page uses 'cookies'. Learn more