Experimental investigation on heat transfer and air flow behavior of latent heat storage unit in a facade integrated ventilation system

The problem of emulsification between Phase Change Material (PCM) and Heat Transfer Fluid (HTF) in direct contact latent heat storage systems has been reported in various studies. This issue causes the PCM to flow out of the storage tank and crystallize at unwanted locations and thus presents a major limitation for the proper operation of such systems. These anomalies become more pronounced when high HTF flow rates are employed with the aim to achieve fast heat transfer rates. The goal of this paper is to find a method which will enable the fast separation of the formed emulsion and thus the uninterrupted operation of the storage unit. In this study, three separation methods were examined and the use of superhydrophobic filters was chosen as the best candidate for the demulsification of the PCM and HTF mixtures. The filter was produced by processing of a melamine sponge with different superhydrophobic adhesives and was tested with emulsions closely resembling the ones formed in a real direct contact setup. The superhydrophobic filter obtained, was able to separate the emulsions effectively while presenting a very high permeability (up to 1,194,980 kg h−1 m−2 bar−1). This is the first time the use of a superhydrophobic sponge has been investigated in the context of demulsification in direct contact latent heat storage.

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Melting heat transfer enhancement of a horizontal latent heat storage unit by fern-fractal fins

Chinese Journal of Chemical Engineering ◽

10.1016/j.cjche.2020.08.022 ◽

2020 ◽

Vol 28 (11) ◽

pp. 2857-2871

Author(s):

Zilong Deng ◽

Suchen Wu ◽

Hao Xu ◽

Yongping Chen

Keyword(s):

Heat Transfer ◽

Heat Transfer Enhancement ◽

Latent Heat ◽

Heat Storage ◽

Transfer Enhancement ◽

Storage Unit ◽

Latent Heat Storage ◽

Melting Heat ◽

Melting Heat Transfer

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Experimental investigation on heat transfer enhancement of latent heat storage system containing spherical capsules with internal hollow and solid fins

10.1063/1.5127592 ◽

2019 ◽

Author(s):

N. Nallusamy ◽

Rahul Roy ◽

A. Surya

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Heat Transfer Enhancement ◽

Latent Heat ◽

Heat Storage ◽

Storage System ◽

Transfer Enhancement ◽

Latent Heat Storage

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Enrichment of heat transfer in a latent heat storage unit using longitudinal fins

Heat Transfer ◽

10.1002/htj.21739 ◽

2020 ◽

Vol 49 (5) ◽

pp. 2659-2685

Author(s):

Digant S. Mehta ◽

Bhavesh Vaghela ◽

Manish K. Rathod ◽

Jyotirmay Banerjee

Keyword(s):

Heat Transfer ◽

Latent Heat ◽

Heat Storage ◽

Storage Unit ◽

Latent Heat Storage

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Transient Response of a Latent Heat Storage Unit: An Analytical and Experimental Investigation

Journal of Solar Energy Engineering ◽

10.1115/1.3266251 ◽

1981 ◽

Vol 103 (3) ◽

pp. 275-280 ◽

Cited By ~ 4

Author(s):

T. F. Green ◽

G. C. Vliet

Keyword(s):

Experimental Investigation ◽

Latent Heat ◽

Heat Storage ◽

Thermal Response ◽

Experimental Unit ◽

Preliminary Evaluation ◽

Storage Unit ◽

Latent Heat Storage ◽

Storage Element ◽

Poly Ethylene

An analytical and experimental investigation of the transient thermal response of a latent heat storage unit is presented. Emphasis is placed on characterization of an entire storage unit rather than a single constituent storage element. In the analysis, two coupled governing partial differential equations that describe the model are derived and solved numerically. In the experimentation, a baffled shell and tube type heat exchanger was fabricated to provide data for a preliminary evaluation of the model. The experimental unit used water as the shell side HFT and poly(ethylene oxide) as the PCM contained within glass tubes. A comparison of experimental and analytical results shows that the analysis predicts somewhat conservative results.

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