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Wyszukujesz frazę "thermal storage" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
Thermal energy storage in buildings: Opportunities and challenges
Autorzy:
Deka, Priyam
Szlęk, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2204063.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal energy storage
renewable energy
phage change material
latent heat thermal energy storage
sensible heat thermal energy storage
Opis:
The energy sector is a majorarea that is responsible for the country development. Almost 40% of the total energy requirement of an EU country is consumed by the building sector and 60% of which is only used for heating and cooling requirements. This is a prime concern as fossil fuel stocks are depleting and global warming is rising. This is where thermal energy storage can play a major role and reduce the dependence on the use of fossil fuels for energy requirements (heating and cooling) of the building sector. Thermal energy storage refers to the technology which is related to the transfer and storage of heat energy predominantly from solar radiation, alternatively to the transfer and storage of cold from the environment to maintain a comfortable temperature for the inhabitants in the buildings by providing cold in the summer and heat in the winter. This work is an extensive study on the use of thermal energy storage in buildings. It discusses different methods of implementing thermal energy storage into buildings, specifically the use of phase change materials, and also highlights the challenges and opportunities related to implementing this technology. Moreover, this work explains the principles of different types and methods involved in thermal energy storage.
Źródło:
Archives of Thermodynamics; 2022, 43, 4; 21--61
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and analysis of energy and exergy performance of a PCM-augmented concrete-based Trombe wall systems
Autorzy:
Ezurike, Benjamin O.
Okoronkwo, Chukwunenye A.
Nwokenkwo, Uchenna
Ajah, Stephen A.
Powiązania:
https://bibliotekanauki.pl/articles/2172772.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Trombe wall
boundary condition
thermal storage
simulation
Ściana Trombe'a
warunek brzegowy
przechowywanie termiczne
symulacja
Opis:
The aim of this research was to model the performances of energy and exergy on a Trombe wall system to enable an adequate thermal comfort. The main equations for the heat transfer mechanisms were developed from energy balances on subcomponents of the Trombe wall with the specification of the applicable initial and boundary conditions. During the incorporation of the PCM on the Trombe wall, the micro- encapsulation approach was adopted for better energy conservation and elimination of leakage for several cycling of the PCM. The charging and discharging of the PCM were equally accommodated and incorporated in the simulation program. The results of the study show that an enhanced energy storage could be achieved from solar radiation using PCM-augmented system to achieve thermal comfort in building envelope. In addition, the results correspond with those obtained from comparative studies of concrete-based and fired-brick augmented PCM Trombe wall systems, even though a higher insolation was used in the previous study.
Źródło:
Archive of Mechanical Engineering; 2022, LXIX, 2; 245--257
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards development of a prototype high-temperature latent heat storage unit as an element of a RES-based energy system (part 1)
Autorzy:
Bogucka-Bykuć, K.
Włosiński, W.
Bykuć, S.
Powiązania:
https://bibliotekanauki.pl/articles/201522.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
latent heat storage
LHS
thermal energy storage system
TESS
phase change material
PCM
renewable energy sources
RES
Opis:
This paper presents briefly the state of the art literature review with respect to research in the field of latent heat storage systems as elements of heat only, power only or combined heat and power (CHP) plants utilizing renewable energy sources (RES) for residential applications. Next, a paper introduces initial research carried out in IMP PAN in Gdańsk, Poland, aimed at development of a prototype latent heat storage unit. Identification of the suggested application for the storage unit in a given system is presented. The first stage of development of a prototype heat storage unit, namely a process of PCM pre-selection is discussed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 489-494
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis and PCM selection for adsorption chiller aided by energy storage supplied from the district heating system
Autorzy:
Karwacki, Jarosław
Kwidziński, Roman
Leputa, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2204066.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal sorption cooling
phase change material
thermal energy storage
district heating
adsorption
energy management
mathematical modelling
load shifting
efficiency
Opis:
The paper presents a theoretical analysis of thermal energy storage filled with phase change material (PCM) that is aimed at optimization of an adsorption chiller performance in an air-conditioning system. The equations describing a lumped parameter model were used to analyze internal heat transfer in the cooling installation. Those equations result from the energy balances of the chiller, PCM thermal storage unit and heat load. The influence of the control of the heat transfer fluid flow rate and heat capacity of the system components on the whole system operation was investigated. The model was used to validate the selection of Rubitherm RT62HC as a PCM for thermal storage. It also allowed us to assess the temperature levels that are likely to appear during the operation of the system before it will be constructed.
Źródło:
Archives of Thermodynamics; 2022, 43, 4; 135--169
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal coefficient of the share of cogeneration in the district heating system cooperating with thermal storage
Autorzy:
Ziębik, A.
Gładysz, P.
Powiązania:
https://bibliotekanauki.pl/articles/240214.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
elektrociepłownia
kogeneracja
sieć ciepłownicza
współczynnik udziału kogeneracji
zasobnik ciepła
coefficient of the share of cogeneration
cogeneration
combined heat and power plant
district heating system
thermal storage
Opis:
The paper presents the results of optimizing the coefficient of the share of cogeneration expressed by an empirical formula dedicated to designers, which will allow to determine the optimal value of the share of cogeneration in contemporary cogeneration systems with the thermal storages feeding the district heating systems. This formula bases on the algorithm of the choice of the optimal coefficient of the share of cogeneration in district heating systems with the thermal storage, taking into account additional benefits concerning the promotion of high-efficiency cogeneration and the decrease of the cost of CO2 emission thanks to cogeneration. The approach presented in this paper may be applicable both in combined heat and power (CHP) plants with back-pressure turbines and extraction-condensing turbines.
Źródło:
Archives of Thermodynamics; 2011, 32, 3; 71-87
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of district heating networks for the purpose of operational optimization with thermal energy storage
Autorzy:
Leśko, M.
Bujalski, W.
Powiązania:
https://bibliotekanauki.pl/articles/240650.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal energy storage
district heating
smart district heating
optimization
magazynowanie energii cieplnej
systemy ciepłownicze
inteligentne systemy ciepłownicze
optymalizacja
Opis:
The aim of this document is to present the topic of modeling district heating systems in order to enable optimization of their operation, with special focus on thermal energy storage in the pipelines. Two mathematical models for simulation of transient behavior of district heating networks have been described, and their results have been compared in a case study. The operational optimization in a DH system, especially if this system is supplied from a combined heat and power plant, is a difficult and complicated task. Finding a global financial optimum requires considering long periods of time and including thermal energy storage possibilities into consideration. One of the most interesting options for thermal energy storage is utilization of thermal inertia of the network itself. This approach requires no additional investment, while providing significant possibilities for heat load shifting. It is not feasible to use full topological models of the networks, comprising thousands of substations and network sections, for the purpose of operational optimization with thermal energy storage, because such models require long calculation times. In order to optimize planned thermal energy storage actions, it is necessary to model the transient behavior of the network in a very simple way – allowing for fast and reliable calculations. Two approaches to building such models have been presented. Both have been tested by comparing the results of simulation of the behavior of the same network. The characteristic features, advantages and disadvantages of both kinds of models have been identified. The results can prove useful for district heating system operators in the near future.
Źródło:
Archives of Thermodynamics; 2017, 38, 4; 139--163
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid nano improved phase change material for latent thermal energy storage system: Numerical study
Autorzy:
Benlekkam, Mohamed Lamine
Nehari, Driss
Powiązania:
https://bibliotekanauki.pl/articles/2065756.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase change material (PCM)
latent heat storage
melting
solidification
thermal energy storage
hybrid nanoparticle
LHTESS
materiał zmiennofazowy
magazynowanie ciepła utajonego
topienie
krzepnięcie
magazynowanie energii cieplnej
hybrydowa nanocząstka
Opis:
The phase change materials (PCM) are widely used in several applications, especiallyi n the latent heat thermal energy storage system (LHTESS). Due to the very low thermal conductivity of PCMs. A small mass fraction of hybrid nanoparticles TiO 2–CuO (50%–50%) is dispersed in PCM with five mass concentrations of 0%, 0.25%, 0.5%, 0.75% and 1 mass % to improve its thermal conductivity. This article is focused on thermal performance of the hybrid nano-PCM (HNPCM) used for the LHTESS. A numerical model based on the enthalpy-porosity technique is developed to solve the Navier-Stocks and energy equations. The computations were conducted for the melting and solidification processes of the HNPCM in a shell and tube latent heat storage (LHS). The developed numerical model was validated successfully with experimental data from the literature. The results showed that the dispersed hybrid nanoparticles improved the effective thermal conductivity and density of the HNPCM. Accordingly, when the mass fraction of a HNPCM increases by 0.25%, 0.5%, 0.75% and 1 mass %, the average charging time improves by 12.04 %, 19.9 %, 23.55%, and 27.33 %, respectively. Besides, the stored energy is reduced by 0.83%, 1.67%, 2.83% and 3.88%, respectively. Moreover, the discharging time was shortened by 18.47%, 26.91%, 27.71%, and 30.52%, respectively.
Źródło:
Archive of Mechanical Engineering; 2022, LXIX, 1; 77--98
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of the objective function for optimization of a seasonal thermal energy storage system
Autorzy:
Milewski, J.
Szabłowski, Ł.
Bujalski, W.
Powiązania:
https://bibliotekanauki.pl/articles/240823.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal energy
solar
storage
seasonal storage
energia cieplna
magazynowanie
Opis:
The article shows the proposed solution of the objective function for the seasonal thermal energy storage system. In order to develop this function the technological and economic assumptions were used. In order to select the optimal system configuration mathematical models of the main elements of the system were built. Using these models, and based on the selected design point, the simulation of the entire system for randomly generated outside temperatures was made. The proposed methodology and obtained relationships can be readily used for control purposes, constituting model predicted control (MPC).
Źródło:
Archives of Thermodynamics; 2014, 35, 4; 69-81
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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