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Tytuł:
A coil generating high and homogeneous magnetic fields
Cewka do wytwarzania silnych jednorodnych pól magnetycznych
Autorzy:
Bednarek, Stanisław
Płoszajski, Julian
Powiązania:
https://bibliotekanauki.pl/articles/699790.pdf
Data publikacji:
2018
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
coil, cylinder, volume, magnetic field, uniformity, tungsten, cooling, liquid helium
cewka, walec, wnęka, pole magnetyczne, jednorodność, wolfram, ch lodzenie, ciekły hel
Opis:
https://doi.org/10.26485/0459-6854/2018/68.1/3 Artykuł dotyczy projektu innowacyjnej cewki do wytwarzania pól magnetycznych o indukcji ponad 55T w objętości kilku dm3. W początkowej części opisana została budowa cewki. Użyteczne pole magnetyczne w tej cewce wytwarzane jest w cylindrycznej wnęce, umieszczonej mimośrodowo wewnątrz walca. Uzwojenie cewki składa się z przewodów, równoległych do osi walca i wnęki oraz przechodzących na zewnątrz tego układu. Przewody wykonane są z wolframu i chłodzone ciekłym helem. W następnej części wyznaczono rozkład przestrzenny indukcji wytwarzanego pola magnetycznego. Przeprowadzono obliczenia przybliżone dla cewki długiej oraz dokładniejsze obliczenia dla cewki o ograniczonej d ługości. Obliczono również podstawowe parametry układu zasilania i chłodzenia tej cewki. Porównano uzyskane wyniki z obecnymi możliwościami technicznymi i przedyskutowano wykonalność projektu. Istotnymi zaletami cewki są: duża jednorodność wytwarzanego pola magnetycznego, zredukowanie pola rozproszonego na zewnątrz oraz niewielka moc strat cieplnych.
https://doi.org/10.26485/0459-6854/2018/68.1/3 This paper deals with an innovative design of a coil producing magnetic fields up to the magnitude of 55T within a volume of approximately a few dm3. The initial part of the paper describes of the design of the coil. The effective magnetic field in the coil is produced in a cylindrical volume located eccentrically inside a cylinder. Winding of the coil consisted of wires parallel to the cylinder and axes which protrude out of the device. The coil wires have been made of tungsten and cooled with liquid helium. The next part of the paper included calculations concerning the spatial distribution of the magnetic field induction. Approximate calculations were conducted for an infinitely long coil and precise calculations for a coil of limited length. Basic parameters for the power supply and cooling systems were also calculated. The collected results were compared with present technical possibilities and the feasibility of the project was discussed. Significant features of the coil include the high uniformity of the magnetic field produced, reduction of the dispersed field outside the coil as well as its low thermal power loss.
Źródło:
Bulletin de la Société des Sciences et des Lettres de Łódź, Série: Recherches sur les déformations; 2018, 68, 1
1895-7838
2450-9329
Pojawia się w:
Bulletin de la Société des Sciences et des Lettres de Łódź, Série: Recherches sur les déformations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A dedicated sensitivity analysis and optimization application for industrial processes
Autorzy:
Myczkowska, Kamila
Szeliga, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/29520087.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sensitivity analysis
modelling of industrial process
optimization
model validation
cooling of rails
Opis:
The paper describes the architecture and the use case of the developed Modelbox system for sensitivity analysis (SA), uncertainty analysis (UA) and the subsequent optimization of industrial processes. The proposed solution addresses the most common practical and technical problems encountered by researchers and engineers when performing sensitivity analysis. It combines the functions from the numerical toolbox with a simulation management system. Maintaining usability and a good user experience while managing complex investigations of time-consuming industrial process simulations is a very important feature of the system. Several improvements were introduced to optimize the computation time of analysis/modelling tasks, including the automatization of distributed calculations, persistent, transparent caching of simulation data and duration estimations from collected statistics. The system has the ability to perform remote, parallel, asynchronous computations of both analytic algorithms and numerical simulations. The system is dynamically scalable horizontally by using serverless computing endpoints and thus it can be easily adapted to the user’s current needs in a flexible way. Modelbox provides web-based access to analysis/modelling tasks from sampling, SA/UA, optimization to metamodelling. It is extended with numerous interactive visualization components for effective results control. In addition, to access data from the completed analysis, the system supports convergence tracking for SA estimates and intermediate optimization results. The process of controlled cooling of rails was considered as a case study. The formulated optimization task was to find a combination of process parameters that ensures a minimum volume fraction of bainite along with required interlamellar spacing and optimal homogeneity of hardness. Different sensitivity analysis methods were used to evaluate the significance of all variables with respect to their influence on the model output.
Źródło:
Computer Methods in Materials Science; 2021, 21, 4; 219-232
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Numerical Study of The Heat Transfer Intensification Using High Amplitude Acoustic Waves
Autorzy:
Rulik, S.
Wróblewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/177492.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cavity noise
sound wave cooling
flow over a cavity
transient cooling
blade cooling intensification
Opis:
The current practice in the efforts aiming to improve cooling conditions is to place emphasis on the application of non-stationary flow effects, such as the unsteady jet heat transfer or the heat transfer intensification by means of a high-amplitude oscillatory motion. The research presented in this paper follows this direction. A new concept is put forward to intensify the heat transfer in the cooling channels with the use of an acoustic wave generator. The acoustic wave is generated by a properly shaped fixed cavity or group of cavities. The sound generated by the cavity is a phenomenon analysed in various publications focused on the methods of its reduction. The phenomenon is related to the feedback mechanism between the vortices flowing from the leading edge and the acoustic waves generated within the cavity. The acoustic waves are generated by the interaction between the vortices and the cavity walls. Strong instabilities can be observed within a certain range of the free flow velocities. The investigations presented in this paper are oriented towards the use of the phenomenon for the purposes of the heat transfer process intensification. The first part of the work presents the numerical model used in the analysis, as well as its validation and comparison with empirical relations. The numerical model is constructed using the commercial CFD Ansys CFX-16.0 commercial program. The next part includes determining of the relationship between the amplitude of the acoustic oscillations and the cooling conditions within the cavity. The calculations are performed for various flow conditions.
Źródło:
Archives of Acoustics; 2018, 43, 1; 31-47
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Numerical Study of the Relation Between the Acoustic Generator Geometry and the Heat Transfer Conditions
Autorzy:
Rulik, S.
Wróblewski, W.
Rusin, K.
Powiązania:
https://bibliotekanauki.pl/articles/140076.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cavity noise
cavity cooling
new cooling techniques
acoustic cooling
acoustic waves
heat transfer in cavities
thermoacoustics
szum aerodynamiczny
chłodzenie zewnętrzne
nowe techniki chłodzenia
chłodzenie akustyczne
fale akustyczne
przepływ ciepła
termoakustyka
Opis:
Modern gas turbine systems operate in temperatures ranging from 1200°C to even 1500°C, which creates bigger problems related to the blade material thermal strength. In order to ensure appropriate protection of the turbine blades, a sophisticated cooling system is used. Current emphasis is placed on the application of non-stationary flow effects to improve cooling conditions, e.g., the unsteady-jet heat transfer or the heat transfer enhancement using high-amplitude oscillatory motion. The presented research follows a similar direction. A new concept is proposed of intensification of the heat transfer in the cooling channels with the use of an acoustic wave generator. The acoustic wave is generated by an appropriately shaped fixed cavity or group of cavities. The phenomenon is related to the coupling mechanism between the vortex shedding generated at the leading edge and the acoustic waves generated within the cavity area. Strong instabilities can be observed within a certain range of the free flow velocities. The presented study includes determination of the relationship between the amplitude of acoustic oscillations and the cooling conditions within the cavity. Different geometries of the acoustic generator are investigated. Calculations are also performed for variable flow conditions. The research presented in this paper is based on a numerical model prepared using the Ansys CFX-17.0 commercial CFD code.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 1; 5-26
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Review of Desiccant Dehumidification Technology
Autorzy:
Al-Ahmedi, Karrar
Powiązania:
https://bibliotekanauki.pl/articles/132065.pdf
Data publikacji:
2020
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
dehumidification technologies
solar cooling
Opis:
This study focuses on dehumidification technologies. It identifies the different types of dehumidification technologies and seeks to understand each technology’s competitive advantages. On the various technologies, the study concentrates on three standard systems. The systems are the solid desiccant-wheel, solid desiccant air conditioner, and the liquid desiccant dehumidification system. The study establishes the characteristics of each of them and how they can be preferred. The study also looks at the applicability of the technologies to different uses and discusses in details application in hotels, supermarkets, and office blocks. In these application areas, the study focuses on benefits and possible consequences for the non-adoption of such systems. The study establishes reasons to support the relevance of this technology to those essential industries. This study concludes by looking at current developments in dehumidification technology. A focus is made on the drivers for the advancement and a discussion of some of the recent improvements. The study adopts this discussion to help advise on the future of dehumidification technology.
Źródło:
Modern Engineering; 2020, 1; 38-42
2450-5501
Pojawia się w:
Modern Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on Dynamic Behavior of Natural Draft Cooling Tower Considering the Effect of Soil-Structure Interaction
Autorzy:
Chitrahalli Lingaraju, Mahesh Kumar
Kotagi Girisha, Shwetha
Bhaktanakatte Channabasappa, Shanthappa
Karigowda, Manjunatha
Powiązania:
https://bibliotekanauki.pl/articles/2051545.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
hyperbolic cooling tower
Richter scale
dynamic response
natural frequency
maximum principal stress
soil-structure interaction
wieża chłodnicza
skala Richtera
badania dynamiczne
naprężenie główne
struktura gruntu
Opis:
In this present era, the technology in advanced construction has developed to a very large extent. Some parts of the constructions are still in the improving stage which includes cooling tower construction. Hyperbolic cooling towers are large, thin shell reinforced concrete structures which contribute to power generation efficiency, reliability, and to environmental protection. Cooling towers use evaporation of water to eject heat from processes such as cooling the circulating water used in oil refineries and in power plants. Nowadays in many thermal power plants, we can see the cooling tower. So, preserving this industrial structure is an effort to save the cooling tower from dangerous earthquakes. The present-day cooling towers are exceptional structures in view of their sheer size and complexities. Present paper deals with the study of dynamic response that is modal analysis, seismic analysis of the two different cooling towers varying the H/t ratio and thicknesses with fixity at the base boundary condition, and the soil is modelled as raft for the effect of soil-structure interaction using the direct approach. In this paper, hyperbolic cooling towers are modelled using ANSYS software, which is a finite element software. Results show that the soil-structure interaction effect significantly modifies the earthquake behavior of hyperbolic cooling towers.
Źródło:
Civil and Environmental Engineering Reports; 2021, 31, 4; 17-32
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Technological System for Using Waste Warm Water from Energy Facilities for Effective Agriculture
Autorzy:
Turcheniuk, Vasil
Rokochinskiy, Anatoliy
Kuzmych, Lyudmyla
Volk, Pavlo
Koptyuk, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2097754.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
waste water heat
soil temperature
soil heating
water regime
recycling
cooling
Opis:
The waste warm waters from power plants, owing to their temperature regime (25–38°C) and the volumes of discharge, allow for their use for heating of open ground areas in agriculture. Underground heating by such water is a new, special heat and irrigation method which enables not only purposeful regulation of temperature conditions of the crop growing environment, but also dissipates heat in the soil, thus cooling the water for its reuse. This makes it possible to reduce the thermal pollution of water sources.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2022, 69, 1; 13-25
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accounting for the random character of nucleation in the modelling of phase transformations in steels
Autorzy:
Poloczek, Łukasz
Kuziak, Roman
Foryś, Jakub
Szeliga, Danuta
Pietrzyk, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/29519774.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
stochastic model
grain size
phase transformations
dislocation density
cooling of rods
heterogeneity of the microstructure
Opis:
In our earlier work, a stochastic model of multi-stage deformation at elevated temperatures was developed. The model was applied to calculate histograms of dislocation density and grain size at the onset of phase transformation. The histograms were used as input data for the simulation of phase transitions using the traditional deterministic model. Following this approach, microstructural inhomogeneity was predicted for different cooling conditions. The results obtained, showing the effect of dislocation density and inhomogeneity of austenite grain size on the microstructural inhomogeneity of the final product, can be considered reliable as they are based on material models determined in previous publications and validated experimentally. The aim of the present work was to extend the model by taking into account the stochastic nature of nucleation during phase transitions. The analysis of existing stochastic models of nucleation was performed, and a model for ferritic transformation in steels was proposed. Simulations for constant cooling rates as well as for industrial cooling processes of steel rods were performed. In the latter case, uncertainties in defining the boundary conditions and segregation of elements were also considered. The reduction of the computing costs is an important advantage of the model, which is much faster when compared to full field models with explicit microstructure representation.
Źródło:
Computer Methods in Materials Science; 2023, 23, 2; 17-28
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acicular Ferrite in Micro Welding Technologies
Ferryt AF w technikach mikro-spawalniczych
Autorzy:
Węgrzyn, T.
Piwnik, J.
Hadryś, D.
Powiązania:
https://bibliotekanauki.pl/articles/350808.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microwelding
laser
micro-jet cooling in welding
weld
metallographic structure
acicular ferrite
mikrospawanie
spawanie z chłodzeniem mikrojetowym
spoiny
struktura metalograficzna
ferryt iglasty
Opis:
Laser is widely applied in micro welding. Apart from that method, welding with micro-jet cooling could be treated as another important method for thin structure welding. Until that moment micro-jet technology is not very popular. An article presents actual information about innovate welding technology with micro-jet cooling in comparison with standard laser welding. There were given information about influence of both micro welding method on metallographic structure of thin steel welds. Amount of AF was tested in two cases.
Laser jest szeroko stosowany w mikro-spawaniu. Oprócz tej metody, spawanie z chłodzeniem mikrojetowym powinno być traktowane jako ważna metoda spawania cienkościennych konstrukcji. W artykule przedstawiono innowacyjną technologię spawania z chłodzeniem mikrojetowym w porównaniu do spawania laserowego. Uzyskano informacje o wpływie obu metod na strukturę metalograficzną stalowych cienkościennych konstrukcji. Zawartość ferrytu AF była porównana w obu przypadkach.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 2; 581-583
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptation of the support frame of the cooling skids system for use in maritime transport
Adaptacja ramy nośnej systemu chłodzącego do wykorzystania w warunkach transportu morskiego
Autorzy:
Flis, L.
Powiązania:
https://bibliotekanauki.pl/articles/221919.pdf
Data publikacji:
2016
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
cooling skids
offshores
frame
mobilne wymienniki ciepła
platformy wiertnicze
ramy
symulacje komputerowe
Opis:
The article presents calculations of the strength of a support frame Skid Cooling units used on oil rigs. The complexity of the equipment does not allow for efficient FEM modeling of such structures. It indicates how to the simplify the model so that the calculations can accepted by the American Bureau of Shipping (ABS).
W artykule przedstawiono obliczenia wytrzymałościowe ramy nośnej jednostki Cooling Skid wykorzystywanej na platformach wiertniczych. Złożoność urządzenia nie pozwala na efektywne modelowanie MES takich konstrukcji. Wskazano, w jaki sposób można uprościć model, aby obliczenia były przyjęte przez towarzystwo klasyfikacyjne American Bureau of Shipping (ABS).
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2016, R. 57 nr 1 (204), 1 (204); 13-23
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorpcja wody na silikażelu w adsorpcyjnych urządzeniach chłodniczych
Water adsorption on silica gel in adsorption chillers
Autorzy:
Gwadera, M.
Powiązania:
https://bibliotekanauki.pl/articles/2072477.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
chłodzenie adsorpcyjne
silikażel
adsorption cooling
silica gel
Opis:
Sprawność chłodziarek adsorpcyjnych wykorzystujących układ silikażel- woda można zwiększyć m.in. zmniejszając opór cieplny na granicy złoże adsorbentu/rurki wymiennika ciepła. W pracy przedstawiono wyniki pomiarów podstawowych wielkości wpływających na zdolność adsorpcyjną silikażelu w stanie ziarnistym i po naniesieniu na powierzchnię metalu. Nie stwierdzono istotnego pogorszenia zdolności adsorpcyjnej w wyniku naniesienia ziaren przy użyciu spoiw opartych na alkoholu poliwinylowym.
Efficiency of silica gel-water adsorption chillers can be increased by the reduction of thermal resistance between an adsorbent bed and heat exchanger tubes. Measurement results of quantities influencing the adsorption capacity of silica gel in a granular form and after consolidation with a metal surface were presented. Significant deterioration of adsorption capacity resulting from pellets’ consolidation with a metal surface with the use of polyvinyl alcohol solutions was not noticed.
Źródło:
Inżynieria i Aparatura Chemiczna; 2013, 4; 317--318
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorpcyjne układy chłodnicze
Adsorption Cooling Systems
Autorzy:
Gwadera, M.
Kupiec, K.
Powiązania:
https://bibliotekanauki.pl/articles/2071493.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
chłodzenie adsorpcyjne
promieniowanie słoneczne
ciepło odpadowe
adsorption cooling
solar radiation
waste heat
Opis:
Ze względu na problemy środowiskowe związane z emisją freonów chłodzenie adsorpcyjne jest atrakcyjnym polem do badań i rozwoju w porównaniu z konwencjonalnymi układami wykorzystującymi te niepożądane substancje. Przedstawiono podstawowe informacje dotyczące adorpcyjnych urządzeń chłodniczych, zasadę działania, charakterystykę stosowanych układów adsorbent-adsorbat, praktyczne zastosowanie tych urządzeń oraz podstawowe wiadomości o ich modelowaniu.
Źródło:
Inżynieria i Aparatura Chemiczna; 2011, 5; 38-39
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption chiller in a combined heating and cooling system: simulation and optimization by neural networks
Autorzy:
Krzywanski, Jarosław
Sztekler, Karol
Bugaj, Marcin
Kalawa, Wojciech
Grabowska, Karolina
Chaja, Patryk Robert
Sosnowski, Marcin
Nowak, Wojciech
Mika, Łukasz
Bykuć, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/2128167.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption heat pump
polygeneration
cooling capacity
low grade thermal energy
artificial neural networks
soft computing
absorpcyjna pompa ciepła
poligeneracja
wydajność chłodnicza
energia cieplna niskiej jakości
sztuczne sieci neuronowe
przetwarzanie miękkie
Opis:
Adsorption cooling and desalination technologies have recently received more attention. Adsorption chillers, using eco-friendly refrigerants, provide promising abilities for low-grade waste heat recovery and utilization, especially renewable and waste heat of the near ambient temperature. However, due to the low coefficient of performance (COP) and cooling capacity (CC) of the chillers, they have not been widely commercialized. Although operating in combined heating and cooling (HC) systems, adsorption chillers allow more efficient conversion and management of low-grade sources of thermal energy, their operation is still not sufficiently recognized, and the improvement of their performance is still a challenging task. The paper introduces an artificial intelligence (AI) approach for the optimization study of a two-bed adsorption chiller operating in an existing combined HC system, driven by low-temperature heat from cogeneration. Artificial neural networks are employed to develop a model that allows estimating the behavior of the chiller. Two crucial energy efficiency and performance indicators of the adsorption chiller, i.e., CC and the COP, are examined during the study for different operating sceneries and a wide range of operating conditions. Thus this work provides useful guidance for the operating conditions of the adsorption chiller integrated into the HC system. For the considered range of input parameters, the highest CC and COP are equal to 12.7 and 0.65 kW, respectively. The developed model, based on the neurocomputing approach, constitutes an easy-to-use and powerful optimization tool for the adsorption chiller operating in the complex HC system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; e137054, 1--11
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption chiller in a combined heating and cooling system: simulation and optimization by neural networks
Autorzy:
Krzywanski, Jarosław
Sztekler, Karol
Bugaj, Marcin
Kalawa, Wojciech
Grabowska, Karolina
Chaja, Patryk Robert
Sosnowski, Marcin
Nowak, Wojciech
Mika, Łukasz
Bykuć, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/2173577.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption heat pump
polygeneration
cooling capacity
low grade thermal energy
artificial neural networks
soft computing
absorpcyjna pompa ciepła
poligeneracja
wydajność chłodnicza
energia cieplna niskiej jakości
sztuczne sieci neuronowe
przetwarzanie miękkie
Opis:
Adsorption cooling and desalination technologies have recently received more attention. Adsorption chillers, using eco-friendly refrigerants, provide promising abilities for low-grade waste heat recovery and utilization, especially renewable and waste heat of the near ambient temperature. However, due to the low coefficient of performance (COP) and cooling capacity (CC) of the chillers, they have not been widely commercialized. Although operating in combined heating and cooling (HC) systems, adsorption chillers allow more efficient conversion and management of low-grade sources of thermal energy, their operation is still not sufficiently recognized, and the improvement of their performance is still a challenging task. The paper introduces an artificial intelligence (AI) approach for the optimization study of a two-bed adsorption chiller operating in an existing combined HC system, driven by low-temperature heat from cogeneration. Artificial neural networks are employed to develop a model that allows estimating the behavior of the chiller. Two crucial energy efficiency and performance indicators of the adsorption chiller, i.e., CC and the COP, are examined during the study for different operating sceneries and a wide range of operating conditions. Thus this work provides useful guidance for the operating conditions of the adsorption chiller integrated into the HC system. For the considered range of input parameters, the highest CC and COP are equal to 12.7 and 0.65 kW, respectively. The developed model, based on the neurocomputing approach, constitutes an easy-to-use and powerful optimization tool for the adsorption chiller operating in the complex HC system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; art. no. e137054
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption cooling as a promising method of waste heat utilization in ship technology
Autorzy:
Szymański, P.
Powiązania:
https://bibliotekanauki.pl/articles/2073643.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
adsorption cooling
adsorpcyjny układ chłodniczny
utylizacja odpadów
Opis:
This paper presents the possibility of practical use of the adsorption cooling method in the shipbuilding technology allowing for the conversion of low temperature waste heat (at approx. 60°C) coming from e.g. main engine cooling water. This work describes the construction and operation of such a device, the characteristics of typical adsorbent-adsorbate combinations, the advantages of such solution and the mathematical model.
Źródło:
Journal of Polish CIMEEAC; 2016, 11, 1; 183--188
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł

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