An experimental and numerical analysis of an improved thermal storage tank with encapsulated PCM for use in retrofitted buildings for heating

Autor: Urška Mlakar, Rok Stropnik, Rok Koželj, Uroš Stritih, Eva Zavrl
Jazyk: angličtina
Rok vydání: 2021
Předmět:
active PCM storage
izboljšani vodni hranilniki
izboljšani hranilniki toplote
020209 energy
0211 other engineering and technologies
02 engineering and technology
TRNSYS
Thermal energy storage
7. Clean energy
Energy storage
latent heat storage
PCM in water systems
021105 building & construction
0202 electrical engineering
electronic engineering
information engineering
latentni hranilniki toplote
enkapsulirane FSS
Electrical and Electronic Engineering
Process engineering
PCM in water tank
Civil and Structural Engineering
enhanced heat storage
udc:536.2:621.642:697
encapsulated PCMs
business.industry
Mechanical Engineering
Numerical analysis
Building and Construction
Energy consumption
Solar energy
6. Clean water
Renewable energy
aktivni FSS hranilniki
13. Climate action
FSS v vodnih sistemih
Environmental science
business
FSS v vodnih hranilnikih
Energy (signal processing)
improved water tank
Zdroj: Energy and buildings, vol. 248, 111196, 2021.
ISSN: 0378-7788
Popis: In the building sector, 40% of final energy is used for heating and cooling. Up to 75% of this is used in residential buildings. It is necessary to take a step forward and reduce this share of energy consumption, in particular through the use of efficient technologies and their integration into the system of renovation of residential buildings, which is a major challenge for future research in this field. An important technology for achieving this goal is heat storage, where the use of phase change materials as heat storage material allows for a higher energy density. The main advantage of using heat storage technologies is the solution of the problem of the temporal divergence of energy demand and the possibility to use a higher share of energy from renewable sources, e.g. such as solar energy. Solar energy as a resource can be used during the day, when production is higher than demand, which allows storing energy for a later period of demand. This also improves the efficiency of the heat generators in the system in which the thermal storage is integrated. The focus of the present study is on the investigation of phase change materials (PCM) as thermal storage in the conventional water tank storage. A comparison was made between a conventional sensible thermal energy storage tank and a hybrid latent heat storage tank, where the PCM was encapsulated in cylindrical nodules and integrated into the water tank to improve the energy density of the conventional water heat storage tank. The results of the experiment showed that 15% of the PCM inside the water storage tank increases heat storage for 70% over conventional heat storage tank with water only inside. The measured experimental data were compared with the simulation results from TRNSYS model to enable further analysis and improvement of the heat storage tank with PCM integration.
Databáze: OpenAIRE
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