Development of free cooling based ventilation technology for buildings: Thermal energy storage (TES) unit, performance enhancement techniques and design considerations – A review

Alizadeh, Mostafa; Sadrameli, S.M.

doi:10.1016/j.rser.2015.12.168

Cited by 93 publications

(31 citation statements)

References 108 publications

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“…This method has been widely used for improving the efficiency of energy systems and energy conservation and temperature regulation in buildings [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermal regulating performance of gypsum/(C18–C24) composite phase change material (CPCM) for building energy storage applications

Karaipekli

Sarı

Biçer

2016

Applied Thermal Engineering

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“…This method has been widely used for improving the efficiency of energy systems and energy conservation and temperature regulation in buildings [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermal regulating performance of gypsum/(C18–C24) composite phase change material (CPCM) for building energy storage applications

Karaipekli

Sarı

Biçer

2016

Applied Thermal Engineering

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“…Methods for improving the thermal performance of double pipe heat exchangers are basically divided into two main groups: active and passive. External power is used in active methods 4 . In such cases, electric, acoustic, or vibrational fields and vibration surfaces are used to disturb the boundary layer and increase turbulence.…”

Section: Introductionmentioning

confidence: 99%

Intelligent modeling of rheological and thermophysical properties of nanoencapsulated PCM slurry

Jirandeh

Mohammadiun

et al. 2020

Heat Trans

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Nanoencapsulated phase change material slurries (NPCMS) combine properties of carried fluid and phase change material (PCM). Usage of NPCMS instead of water as a working fluid has a lot of advantages in many industrial fields. The costly and time-consuming determination of thermophysical properties of NPCMS through the experimental analysis led the current investigations to use soft computing methods like correlating, artificial neural network (ANN), and ant colony optimization (ACO R ). In this study, the application of ANN, empirical correlations, and ACO R for modeling the thermophysical properties of NPCM slurry, which has been synthesized through a facile and eco-friendly procedure, has been investigated. PCM nanocapsules have been synthesized using a miniemulsion polymerization method. Nancapsules consist of AP-25 as core and a Styrene shell, which is modified with graphene oxide nanosheets as an extra protective screen.The morphology and thermal properties of nanocapsules were characterized and analyzed, respectively. Results revealed that minimum average particle-size values result in a melting latent heat of 146.8 J/g. In case of NPCM slurry, the results showed that the thermal conductivity of MPCS decreased with particle concentration for the temperatures below the melting point. The NPCMS can be considered a Newtonian fluid within the test region (shear rate > 200/seconds and mass fraction < 0.25). The ANN-ACO R model consists of two neurons in the input layer, six neurons in the hidden layer, and two neurons in the output layer. The input layer consists of two nodes (PCM concentration and temperature) that correspond to parameters found essential and sufficient for thermophysical properties prediction. Upon comparison, the results show that the presented model, which is a combination of the ACO R algorithm and an artificial neural network, is compatible with experimental work. K E Y W O R D SANN modeling, ant colony, phase change material, slurry, thermophysical properties

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“…This has caused severe impact to the environment, evidenced by the growing particulate and gas (CO 2 , SO 2 , NO x , etc) emissions and measurable global temperature rise due to greenhouse gases, mainly CO 2 . Development of renewable energy and energy efficiency technologies and exploitation of the new energy sources are recognized as the effective solutions to mitigate the energy shortage and environment problems . These involve (a) increasing the use of “clean” energy sources (eg, nuclear and renewable energy sources); (b) developing viable technologies that can reduce the use of the fossil fuels and mitigate the environment deterioration (eg, CO 2 capture and sequestration); (c) exploring new and clean energy sources (eg, fusion); and (d) developing alternative (synthetic) fuels and large scale energy storages .…”

Section: Introductionmentioning

confidence: 99%

Numerical study of nanoencapsulated phase change material inside double pipe heat exchanger

Iranfar

Saraei

2019

Heat Trans. Asian Res.

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Nanoencapsulated phase change material (NPCM) slurry is a dispersion where the phase change material (PCM) is dispersed in fluid. Compared with fluid, these nanofluids have a higher heat capacity during the phase change and a possible enhancement, as a result of this phase change, in the heat transfer phenomenon. To appreciate the merits, in terms of energy, a numerical study has been carried out with fluid based on NPCM inside double pipe heat exchanger. The numerical simulation results have been validated using experimental heat transfer data. The Reynolds and Nusselt numbers have been determined using thermal conductivity and viscosity evaluated in the same conditions as those in numerical model. The results obtained show an improvement of this energetic criterion at low mass flow rate compared with the base fluid. Analysis of the numerical and analytical results reveal that higher inlet flow rate and NPCM concentration results in higher heat transfer rate. In addition, increasing NPCM slurry temperature decreases its performance due to fast melting of PCM inside the tube. K E Y W O R D S double pipe, heat transfer, nanocapsule, phase change, slurry

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Development of free cooling based ventilation technology for buildings: Thermal energy storage (TES) unit, performance enhancement techniques and design considerations – A review

Cited by 93 publications

References 108 publications

Thermal regulating performance of gypsum/(C18–C24) composite phase change material (CPCM) for building energy storage applications

Thermal regulating performance of gypsum/(C18–C24) composite phase change material (CPCM) for building energy storage applications

Intelligent modeling of rheological and thermophysical properties of nanoencapsulated PCM slurry

Numerical study of nanoencapsulated phase change material inside double pipe heat exchanger

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