Wyniki wyszukiwania - BazTech

1

Using design thinking in agile organizations in the aspect of sustainable development of the organization

Kocot Maria, Szymańska Marika

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2025

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z. 218

353--370

EN

Purpose: The aim of the article is to analyze the application of Design Thinking in agile organizations in the context of sustainable development. The study focuses on identifying the determinants of the effective implementation of this approach and assessing its impact on the adaptability, innovation and long-term effectiveness of the organization. Design/methodology/approach: The study used a survey method, based on a survey questionnaire conducted among 303 respondents. The results were subjected to multiple correspondence analysis (MCA) to identify the relationships between key aspects of Design Thinking and their impact on the functioning of the organization. Findings: The results indicate that Design Thinking plays an important role in agile organizations, supporting iterative processes, interdisciplinary collaboration, and a flexible approach to changing conditions. The highest ratings were given to aspects related to prototyping, iterative process improvement, and rapid identification of problems and needs. Research limitations/implications: The study is based on a survey conducted on a sample of 303 respondents, which limits the possibility of full generalization of the results. Multiple correspondence analysis identifies relationships between variables but does not determine cause-effect relationships. The lack of analysis of the long-term impact of Design Thinking indicates the need for longitudinal studies and extension of the analysis to different sectors. Practical implications: The use of Design Thinking in agile organizations can contribute to more effective innovation management, better alignment of strategies with stakeholder needs, and implementation of practices consistent with the principles of sustainable development. The research results can be the basis for recommendations for organizations striving to increase their adaptive capacity and optimize management processes. Social implications: Implementation of Design Thinking supports creation of more inclusive and socially responsible solutions, adapted to real needs of users. Interdisciplinary cooperation and creative approach support building business models that take into account sustainable development and positive impact on the environment. Originality/value: The article provides empirical evidence for the importance of Design Thinking in agile organizations, emphasizing its impact on sustainable development and long- term effectiveness. The use of MCA analysis allows for a detailed determination of the relationships between the key elements of this approach, which is a significant contribution to the development of research on innovative management methods.

2

Efficiency of transport policies in EU countries

Bondar Nataliia, Strojny Jacek

Transport Problems

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2025

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T. 20, z. 2

197--209

EN

Strengthening the national economy and ensuring competitiveness in international markets requires tools for objectively assessing the effectiveness of government policy. It is important to evaluate the economic effectiveness of transport policy in comparison with other countries. A conceptual approach is proposed for assessing the economic efficiency of state transport policy through the country’s transport performance indicators. The added value created in the transport sector per employee is proposed as an indicator of economic efficiency. The results of the transport sector’s activities are influenced by both macroeconomic factors and sectorspecific factors that impact its functioning and development trends. Therefore, to determine the effectiveness of a country’s transport policy, it is proposed to use clustering based on macroeconomic indicators and transport sector indicators. These indicators were selected based on their correlation with the value of added value created in the transport sector per employee. Four clusters of EU countries were formed. The clustering results obtained using Vard’s dendrogram were confirmed by the k-means grouping method. The clustering results showed that the distribution of countries across clusters differs when examining the impact of macroeconomic factors and the level of development in the transport sector. There are situations when countries in a stronger cluster in terms of macroeconomic indicators move to a cluster with average transport sector performance. Information on a country’s position among clusters and within a cluster, compared to other comparable countries in terms of transport sector performance indicators, will provide an objective assessment of the effectiveness of state transport policy. This confirms the thesis that transport policy implementation tools must be comprehensive and taken into account when developing programmes and strategies for the development of both the transport sector and other sectors or regions of the country. They must also take into account inter-sectoral links, the impact on the socio-economic well-being of the population and the security of the country. A generalized model for the formation of state transport policy is also presented, taking into account the results of an analysis of the achieved transport performance indicators and the identification of possible target indicators as well as the best practices of the cluster countries. The monographic method, abstraction, comparative analysis, statistical correlation analysis, cluster analysis, and graphical and analytical methods were used in the work. The information base was compiled through modern research by scientists in the field of the transport sector’s effective functioning, state transport policy, and official data from the Statistical Office of the European Union.

3

Selection of Indicators for Assessing the Efficiency of Hybrid Turbo-Electric Propulsion System Configurations for Passenger Aircraft

Pushylin Oleksii, Loginov Vasyl

Transactions on Aerospace Research

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2025

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Nr 1 (278)

85--97

EN

This study examines key indicators and criteria for assessing the efficiency of hybrid turbo-electric propulsion system (HTEPS) configurations for passenger aircraft. A comprehensive review of scientific and technical literature was conducted to identify the most relevant efficiency metrics for HTEPS, with a focus on hybrid-electric propulsion and fuel cell integration. The Evektor EV-55 Outback light multipurpose aircraft, known for its short takeoff and landing capabilities, was selected as a reference model. The study highlights the advantages of all-electric propulsion for a nine-seater aircraft, discussing the impact of hybridization on fuel efficiency, performance, and cost-effectiveness. Two hybridization architectures-sequential and parallel-are evaluated, with the sequential architecture deemed more suitable for small aircraft due to its simplicity and feasibility. The findings confirm that utilizing an engine with lower rated power, in combination with a hybrid-electric system, is a more efficient and cost-effective approach compared to conventional higher-powered engines. The paper concludes with recommendations for optimizing HTEPS configurations and future research directions in hybrid-electric aviation.

4

Photovoltaics output model with independent weather factors. Implications for the capacity management and its sensitivity analysis

Brzęczek Tomasz

Rynek Energii

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2025

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Nr 4

98--104

EN

Businesses and households that operate photovoltaics became prosumers of energy. A prosumer produces solar energy for self-consumption and exports production surplus to the grid. When consumption exceeds production the missing energy is imported from the grid. We analyze the photovoltaics stand-alone optimal capacity for which energy flows between a prosumer and the grid compensate fully. This considers that net-metering equals 0 and export to the grid is balanced with import from the grid. Under net-billing energy export is subject to financial risk due to market price. However, installation of energy warehouse of appropriate capacity mitigates this problem. We apply the optimization model known from the literature although verified here with empirical hourly output during whole year and its generalized least squares regression. We propose how to measure risk of energy flows imbalance with confidence interval for mean efficiency of photovoltaics. Additionally, costs relation range for the optimal capacity solution is considered. The bigger the estimate is the smaller the output risk is and the shorter is optimal capacity interval. We control results for weather independent variables such as wind, air pressure, temperature and humidity.

PL

Przedsiębiorstwa i gospodarstwa domowe, które eksploatują fotowoltaikę, stały się prosumentami energii. Prosument produkuje energię słoneczną na potrzeby własne, a nadwyżki produkcyjne eksportuje do sieci. Gdy zużycie przewyższa produkcję, brakująca energia jest importowana z sieci. Analizujemy wolnostoj ącą moc optymalną fotowoltaiki, dla której przepływy energii między prosumentem a siecią W pełni kompensują przepływy energii. Zakłada to, że net-metering jest równy 0, a eksport do sieci jest równoważony importem z sieci. W ramach net-billingu eksport energii jest obarczony ryzykiem finansowym ze względu na cenę rynkową. Jednak instalacja magazynu energii o odpowiedniej pojemności łagodzi ten problem. Stosujemy model optymalizacyjny znany z literatury, choć tutaj zweryfikowany empirycznymi wynikami godzinowymi w ciągu całego roku i jego uogólnioną regresja metodą najmniejszych kwadratów. Podpowiadamy, w jaki sposób mierzyć ryzyko niezbilansowania przepływów energii za pomocą przedziału ufności dla średniej sprawności fotowoltaiki. Dodatkowo brany jest pod uwagę zakres relacji kosztów dla optymalnego rozwiązania wydajnościowego.” Im większe jest oszacowanie, tym mniejsze jest ryzyko produkcji i tym krótszy jest optymalny przedział wydajności. Kontrolujemy wyniki dla zmiennych niezależnych od pogody, takich jak wiatr, ciśnienie powietrza, temperatura i wilgotność.

5

Zastosowanie egzoszkieletów w budownictwie

Szóstak Mariusz, Solczak Urszula

Przegląd Budowlany

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2025

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R. 96, nr 2

237--239

PL

Egzoszkielety to innowacyjne urządzenia, które wspierają pracowników budowlanych, zmniejszając obciążenia mięśniowo-szkieletowe oraz ryzyko urazów. Artykuł przedstawia przegląd dostępnych rozwiązań, badań nad ich skutecznością oraz przyszłych kierunków rozwoju tej technologii. Badania wykazały, że egzoszkielety mogą poprawiać ergonomię pracy, redukując wysiłek fizyczny i zmniejszając dolegliwości bólowe, zwłaszcza w dolnej części pleców oraz ramionach. Eksperymenty przeprowadzone zarówno w warunkach laboratoryjnych, jak i na terenach budowy potwierdzają ich pozytywny wpływ na zdrowie i wydajność pracowników. Jednocześnie zauważono pewne ograniczenia – niektóre egzoszkielety mogą powodować dyskomfort w klatce piersiowej lub zwiększać obciążenie poznawcze, co może wpływać na koncentrację i świadomość sytuacyjną.

EN

Exoskeletons are innovative devices that support construction workers by reducing musculoskeletal strain and the risk of injuries. This article provides an overview of available solutions, research on their effectiveness, and future directions for the development of this technology. Studies have shown that exoskeletons can improve workplace ergonomics by reducing physical effort and alleviating pain, particularly in the lower back and shoulders. Experiments conducted in both laboratory settings and construction sites confirm their positive impact on workers’ health and productivity. However, some limitations have been noted – certain exoskeletons may cause chest discomfort or increase cognitive load, potentially affecting concentration and situational awareness.

6

Wydajność pracy podbijarek torowych w cyklu rocznym

Janowiec Filip, Giza Patrycja

Przegląd Budowlany

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2025

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R. 96, nr 1

70--73

PL

W artykule przedstawiono analizę wydajności prac wybranych typów podbijarek torowych realizujących roboty inwestycyjne na polskiej sieci kolejowej. Celem pracy było określenie tzw. wydajności eksploatacyjnej, wyznaczanej dla efektywnej pracy maszyny na zamkniętym torze, w ramach trwającej budowy. Na podstawie danych pochodzących z sześciu pełnych lat funkcjonowania przedsiębiorstwa oszacowano wydajności eksploatacyjne w poszczególnych miesiącach, tworząc histogramy wydajności pracy podbijarek torowych w cyklu rocznym.

EN

The article presents an analysis of the work efficiency of selected types of track tampers performing investment works on the Polish railway network. The aim of the work was to determine the so-called operating efficiency, determined for the effective work of the machine on a closed track, as part of the ongoing construction. Based on data from six full years of the company’s operation, operating efficiency was estimated in individual months, creating histograms of the work efficiency of track tampers in the annual cycle.

7

Evaluation of three common methods of bulk lipid quantification in soft tissues of marine benthic invertebrates

Sokołowski Adam, Czajkowska Kaja

Oceanological and Hydrobiological Studies

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2025

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Vol. 54, No. 3

160--170

EN

Different analytical methods are used in biochemical laboratories to quantify lipid content in marine organisms, but the comparative utility of these protocols has not been assessed yet. This study evaluated three common methods of bulk lipid determination in the soft tissues of macrobenthic invertebrates in terms of their yield and labour intensity: the gravimetric method and two colourimetric methods of Marsh and Weinstein (1966) and Frings and Dunn (1970). Lipids were first extracted from three macrofaunal species, which were sampled in the coastal zone of the Gulf of Gdańsk (southern Baltic Sea): mussel Mytilus trossulus, shrimp Crangon crangon and polychaete Hediste diversicolor, using the Bligh and Dyer extraction technique (Bligh & Dyer, 1959). All tested methods proved accurate, precise and reproducible but differed in validation parameters and workload. The Marsh and Weinstein method provided an analytical procedure of the highest precision and recovery, the lowest limit of detection; however, it was laborious. The gravimetric method was the least labour-intensive but had the poorest validation parameters. The Frings and Dunn method produced more reliable results than the gravimetric method, but was the most time-consuming.

8

Durability of ground improvement in road construction projects

Kowalewska Agata, Graczyk Mirosław, Świtała Marcin

Materiały Budowlane

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2025

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nr 10

21--27

EN

The durability of ground improvement is a key factor determining the long-term performance and safety of road construction projects. This paper presents selected aspects that influence the durability of ground improvement, as well as an overview of the most important reinforcement methods. It also includes a review of international experiences, highlighting differences in the selection of technologies and improvement depths, as well as an analysis of the costs of selected methods in relation to their effectiveness and service life. The findings confirm that material properties, quality of execution, and economic and environmental aspects play a decisive role in ensuring the long-term reliability of applied solutions.

PL

Trwałość wzmocnień podłoża gruntowego stanowi kluczowy czynnik decydujący o długoterminowej trwałości i bezpieczeństwie inwestycji drogowych. W artykule przedstawiono wybrane aspekty determinujące trwałość wzmocnień podłoża gruntowego oraz przytoczono najważniejsze metody stosowane do jego wzmacniania. Uwzględniono przegląd doświadczeń zagranicznych, wskazujących na różnice w podejściu do doboru technologii i głębokości wzmocnienia, oraz analizę kosztów wybranych metod w odniesieniu do ich efektywności i trwałości eksploatacyjnej. Analiza potwierdza, że zarówno właściwości materiałów, precyzja wykonania, jak i aspekty ekonomiczne oraz środowiskowe decydują o długotrwałej skuteczności wzmocnienia podłoża.

9

Implementation of the Models of Operational Research for the Solution of the CNC Machines Life Cycle

Šaffová Damiána, Petráš Dávid, Mykhei Maksym

Management Systems in Production Engineering

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2025

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nr 2 (33)

289--297

EN

Operational research is a significant part of management, based on improving efficiency, operability, and machine quality. Those improvements influence the time of the repair process, workforce availability for the repair process, safety, and environment. The main goal of this article is to investigate the optimal – operating service life of the machine and the optimal – operating time interval for the renewal of the CNC metalworking machine. The research was implemented in a small enterprise in Slovakia that needed a CNC machine in the production process. The research hypothesis was determined H1: Using quantitative models of operational research can manage the machine’s life cycle. We used quantitative mathematical models of operational research. By calculation, we found that the optimal – operational lifetime of the CNC machine is 6 years. The renewal time of the machine is between the 5th and 6th year of use with a minimal level of the total costs for repairs and maintenance. This simulation is essential information for the financial plan for CNC machine renewal. The results of the research showed a confirmed hypothesis. The suggested proactive model is a viable instrument for the machine park in small enterprises with various orientations.

10

E-Kanban Application and Value Stream Mapping in the Optimisation of Logistics Processes

Pekarcikova Miriam, Trebuna Peter, Kronova Jana, Kliment Marek

Management and Production Engineering Review

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2025

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Vol. 16, No. 1

1--12

EN

The article focuses on the issue of streamlining logistics processes by applying selected VSM and kanban lean tools, which are also of great importance in the current digital age, especially from the point of view of finding the potential for eliminating processes and activities that do not add value. Unlike traditional supply systems, the new dynamic approach to inventory management is that it considers unique procurement methods, unique demand, and product flows through the manufacturing process. The mentioned approach aims to define the optimal amount of stock, which can ensure the required level of supply service and, at the same time the efficiency of material flows in production and assembly and reflect on fluctuations in demand In the analysis and verification of outputs, methods of lean production, VSM, OEE monitoring, and kanban were used. An object-oriented approach to business process modelling using ARIS software was used for process algorithmizing.

11

Działania Lean Management wspierające efektywność kopalni odkrywkowych

Nowak Sylwia, Milewski Krystian

Kierunek Surowce

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2025

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nr 2

65-67

PL

Zarówno działania Lean, jak i digitalizacja mają bezpośredni wpływ na zwiększenie poziomu bezpieczeństwa w zakładzie. Standaryzacja prowadzi do lepszej organizacji pracy i ma przełożenie na minimalizację czynników ryzykownych.

12

Comparison of annual electrical energy losses of conventional and superconductive transformers in power lines

Wajda Józef

Journal of Automation, Electronics and Electrical Engineering

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2025

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Vol. 7, No. 1

39--50

EN

The aim of the work is to compare performance and annual results losses of electrical energy lost by transformers superconducting and conventional. The efficiency has been calculated both transformers installed in the power plant at changing load. The example used superconducting transformer with 2G0 winding. Obtained the results show 80% less energy loss per year compared to transformers with copper windings.

13

Warunki efektywnego działania pomp ciepła

Żarski Kazimierz

Instal

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2025

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nr 5

12--18

PL

Istniejące przepisy prawa [4,5,6] wymagają, aby w projekcie budowlanym obiektu budowlanego została zawarta analiza możliwości racjonalnego wykorzystania odnawialnych źródeł energii i ciepła. Prawo budowlane [6] i Rozporządzenie w sprawie warunków technicznych, jakim powinny odpowiadać budynki [4] nie zawierają sformułowania tego obowiązku w odniesieniu do inwestora budynku, tylko do autora projektu. Jest to kuriozalne, albowiem decyzja o zastosowaniu odnawialnych źródeł ciepła ma, oprócz aspektu ekologicznego, aspekt finansowy. Podobnie jak w przypadku kolektorów słonecznych [1,2] działanie central z pompami ciepła może być obarczone błędami wynikającymi ze specyfiki ich działania i schematów niedostosowanych do warunków funkcjonowania pomp ciepła, najczęściej „przeniesionych” z układów kotłowni. W artykule wskazano na typowe błędy w schematach ideowych central z pompami ciepła, powodujące obniżenie efektywności działania i zwiększenie kosztu ogrzewania budynków i przygotowania ciepłej wody.

EN

The existing legal regulation [4,5,6] requires that the construction design of a building should include an analysis of the possibilities of rational use of renewable energy and heat sources. The Construction Law [6] and the Regulation on technical conditions that buildings should meet [4] do not contain a formulation of this obligation in relation to the building investor, but only to the author of the construction design. This is bizarre because the decision to use renewable heat sources has, in addition to the ecological aspect, a financial aspect. Similarly to solar collectors [1,2], the operation of heat pump installation may be subject to error resulting from the specifics of their operation and diagrams not adapted to the conditions of operation of heat pumps, most often “transferred” from boiler systems. The article indicates typical errors in the conceptual layout of heat pump units, resulting in reduced operational efficiency and increased costs of heating the building and preparing domestic hot water.

14

The use of artificial neural networks for the assessment of the operation of settling tanks

Domurat Katarzyna, Ochowiak Marek, Krupińska Andżelika, Włodarczak Sylwia, Ochowiak Oskar, Tomikowska Róża, Tomikowski Rafał, Matuszak Magdalena

Green Sciences

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2025

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Vol. 27, nr 1

1--10

EN

The aim of the research was to develop and evaluate the usefulness of artificial neural network models for predicting the key operating parameters of centrifugal settlers. Various settler structures were analyzed, taking into account such elements as internal partitions and also inlet and outlet nozzles. Neural network modeling was continued until the highest possible quality was achieved in terms of training, testing and validation, with the occurrence of errors also being minimized. This process involved multiple iterations and adjustments of the network’s parameters to achieve optimal results. It was shown that artificial neural networks are characterized by having high accuracy in predicting the efficiency and damming values of centrifungal sedimentation tanks with regards to their design and hydraulic load. The designed network is able to determine both efficiency and liquid level with satisfactory accuracy.

15

Transformacja wodorowa, ale jaka? - część druga

Godzon Robert

Gaz, Woda i Technika Sanitarna

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2025

|

Nr 1

24-27

PL

W artykule poruszono tematy związane z transformacją wodorową, w kontekście sprawność energetycznej, jak i kontekście logistycznej technologii wodorowych. Większości społeczeństwa uważa, że technologia jest warunkowana przez wytwarzanie wodoru. W artykule po ruszono ważniejszy problem w technologii wodorowej, a więc sprawność procesu w odniesieniu do magazynowania wodoru i dystrybucji.

EN

The article discusses topics related to hydrogen transformation in the context of energy efficiency and the context of hydrogen logistics. Most people have the impression that technology is conditioned by hydrogen production. This article aims to address a much more important issue in hydrogen technology, namely the efficiency of the process in relation to hydrogen storage and distribution.

16

Efficiency and Reliability : Optimization of Energy Management in Electric Vehicles Apply Monarch Butterfly Algorithm and Fuzzy Logic Control

Shermila P Josephin, Disney D Anu, Lenus C Reeda, Niruban R

Eksploatacja i Niezawodność

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2025

|

Vol. 27, no. 3

art. no. 200691

EN

This paper proposes a Monarch Butterfly Optimization (MBO)-based energy management strategy and a fuzzy logic-based nonlinear controller for electric vehicles (EVs). The MBO algorithm optimizes energy sharing between the battery, electric motor, and regenerative braking system, while the fuzzy logic controller compensates for nonlinearities and uncertainties in EV operations. The objectives are to minimize energy wastage, reduce emissions, and enhance efficiency. The MBO algorithm tunes the fuzzy logic controller to meet energy demands under varying driving conditions. Simulation results show that the proposed approach outperforms traditional methods in efficiency and reliability. The paper also explores the combination of MBO and fuzzy logic for hybrid energy storage systems in photovoltaic-powered EVs, focusing on optimizing battery and supercapacitor performance. The main goal is to improve energy management system performance for cost-effective operation and enhanced EV stability and reliability.

17

Economic and environmental aspects of agricultural efficiency of new and old member states of the European Union – is there a chance to reduce the differences?

Kubik Renata

Economics and Environment

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2025

|

No. 1

art. no. 822

EN

The study brings attention to a significant problem: the gap in eco-efficiency between EU countries depending on the date of accession. This study aims to analyse eco-efficiency at the micro-level (farm) between two distinct groups of EU Member States: those that joined before 2004 and after 2004. The survey covered individual commodity farms dealing with field crops. The research used data from the Farm Accountancy Data Network from 2013 to 2020. The study uses input-oriented Data Envelopment Analysis (DEA) and the Malmquist productivity index. The study concludes that farms in countries that acceded to the EU before 2004 feature a higher eco-efficiency level. On the other hand, farms from the EU Member States that joined the EU at the expansion stage after 2004 have gradually reduced the distance, which is reflected by the increased dynamics of the eco-efficiency index in the period under review.

PL

Wspólna Polityka Rolna w aktualnej perspektywie czasowej (2023-2027) zwraca szczególną uwagę na aspekty związane ze środowiskiem naturalnym. Tak ustalone priorytety to ogromna szansa dla krajów przyłączonych do Unii Europejskiej po 2004 roku. Ich rolnictwo charakteryzuje się niskim stopniem uprzemysłowienia, co stwarza możliwość wykorzystania przewag konkurencyjnych przejawiających się m.in. w postaci dobrze zachowanego ekosystemu. Niezmiennie ważny pozostaje aspekt ekonomiczny produkcji rolniczej. Pojęcie ekoefektywności łączy te dwa istotne czynniki. Celem opracowania jest ocena ekoefektywności rolnictwa, jej zróżnicowania i dynamiki pomiędzy dwoma grupami państw członkowskich Unii Europejskiej w latach 2013-2020. Badaniu poddano gospodarstwa towarowe o typie uprawy polowe. W opracowaniu zastosowano metodę DEA oraz obliczono wskaźniki produktywności Malmquista. Przeprowadzona analiza potwierdziła postawione hipotezy. Gospodarstwa rolne w krajach, które przystąpiły do UE przed 2004 rokiem, posiadają wyższy poziom wskaźnika ekoefektywności. Gospodarstwa rolne z krajów członkowskich UE, które przystąpiły w fazie rozszerzenia UE po 2004 roku, stopniowo zmniejszają dystans, co zostało potwierdzone wyższą dynamiką wskaźnika ekoefektywności w badanym okresie.

18

Comprehensive review of advancements, challenges, design, and environmental impact in floating photovoltaic systems

Attar Hani, Alahmer Ali, Borowski Gabriel, Alsaqoor Sameh

Ecological Engineering & Environmental Technology

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2025

|

Vol. 26, iss. 2

301--322

EN

Floating photovoltaic (FPV) systems have emerged as an innovative and sustainable solution for renewable energy generation, offering advantages such as enhanced efficiency, land conservation, and integration with aquatic environments. This review examines critical factors influencing the efficiency, cost-effectiveness, and long-term viability of FPV systems compared to conventional land-based photovoltaic installations. Key considerations include the natural cooling effect of water, structural stability under environmental forces, electrical system optimization for safety and performance, and site selection to balance ecological preservation with energy generation. The study also explores maintenance strategies to address challenges like biofouling and corrosion, along with the environmental impacts of FPV systems on aquatic ecosystems, water quality, and biodiversity. Advanced corrosion protection methods, including multilayer coatings and cathodic protection, are highlighted for their role in extending system durability, while innovations in design, such as compliant modular structures, address stability in variable-depth and high-stress environments. FPV systems benefiting from reduced maintenance and enhanced energy output due to water’s cooling effect. Case studies, such as the Huainan Coal Mine FPV system in China and the Omkareshwar Reservoir FPV project in India, demonstrate the transformative potential of FPV technology in mitigating climate change, optimizing land use, and promoting energy security. The review provides a comprehensive framework for successful FPV system deployment, offering actionable insights for engineers, policymakers, and stakeholders to advance sustainable energy solutions.

19

Analiza efektywności paneli fotowoltaicznych chłodzonych cieczą

Panowski Marcin, Nowak Krzysztof

Ciepłownictwo, Ogrzewnictwo, Wentylacja

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2025

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T. 56, nr 2

31--35

PL

Chłodzenie powierzchni roboczej paneli PV jest kluczowym czynnikiem operacyjnym, który pozwala osiągnąć wyższą sprawność w warunkach eksploatacyjnych. Panele w warunkach rzeczywistych nagrzewają się nawet do temperatury przekraczającej 60°C, co powoduje znaczny spadek zarówno sprawności, jak i osiąganej mocy. Prawidłowe chłodzenie może nie tylko poprawić wydajność elektryczną, ale także zmniejszyć szybkość degradacji ogniw, co skutkuje maksymalizacją żywotności modułów fotowoltaicznych i większym uzyskiem energii. W pracy przedstawiono wyniki eksperymentalnych badań paneli słonecznych chłodzonych wodą, poprzez rozprowadzenie filmu wodnego na ich powierzchni. Uzyskane rezultaty wykazały, że dzięki chłodzeniu paneli można istotnie zwiększyć uzysk energii przez poprawę sprawności, a także, że grubość filmu wodnego (w badanym zakresie) nie wpływa w żaden sposób, w tym negatywnie, na poprawę sprawności.

EN

Cooling the working surface of PV panels is a key operational factor that allows to achieve higher efficiency in real conditions. In operating conditions, panels heat up to temperatures exceeding 60°C, which causes a significant decrease in both efficiency and generated power. Proper cooling can not only improve electrical efficiency, but also can reduce the rate of cell degradation over time, which results in maximizing the life span of photovoltaic modules and higher energy yield. The paper presents the results of experimental studies of solar panels, cooled by spreading a water film on their surface. The obtained results showed that owing to cooling the panels, it is possible to significantly increase energy yield by improving efficiency, and also that the thickness of the water film (in the tested range) does not affect in any way, including negatively, the improvement of efficiency.

20

Sprawność i efektywność przekazywania energii i ciepła przy ogrzewaniu budynków

Żarski Kazimierz

Budownictwo i Prawo

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2025

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R. 28, nr 4

9--13

PL

W artykule podano definicje pojęć i formuły matematyczne służące do określenia wielkości fizycznych używanych w technice cieplnej i chłodniczej, objętej skrótem HVACR (heating, ventilation, air conditioning, refrigeration – ogrzewanie, wentylacja, klimatyzacja, chłodzenie) związanych z ciepłem i energią. Niestety, pojęcia ciepła i energii, sprawności i efektywności są mylone w literaturze i przepisach prawa, a definicja energii praktycznie nie została zmieniona od starożytności, choć nie znano wówczas jej wszystkich form. Celem artykułu jest uporządkowanie terminologiczne i formalne zagadnienia przekazywania ciepła i energii.

EN

This article provides definitions of terms and mathematical formulas used to define physical quantities used in the heating and cooling technology covered by the abbreviation HVACR (heating, ventilation, air conditioning, refrigeration, related to heat and energy). Unfortunately, the concepts of heat and energy, efficiency, and effectiveness are confused in literature and legal regulations, and the definition of energy has remained virtually unchanged since ancient times, even though not all its forms were known at the time. The aim of this article is to clarify the terminology and formal aspects of heat and energy transfer.