Experimental investigations on the influence of ice floating in an internal melt ice-on-coil tank

López-Navarro, A.; Biosca-Taronger, J.; Torregrosa-Jaime, Bárbara; Corberán, José M.; Bote-García, J.L.; Payá, J.

doi:10.1016/j.enbuild.2012.10.040

Cited by 32 publications

(33 citation statements)

References 15 publications

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“…The separation of ice from different surfaces of the inner and outer tubes played an important role on the PCM temperature distribution. This was consistent with López-Navarro et al[15]. While the PCM Near Tube Bottom thermocouple showed a gradual increase during the melting process, the PCM Near Tube Top showed different peaks along the melting process.…”

supporting

confidence: 92%

Experimental investigation of the effect of dynamic melting in a cylindrical shell-and-tube heat exchanger using water as PCM

et al. 2017

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In the present paper, an experimental study is carried out to evaluate the effect of the dynamic melting concept in a cylindrical shell-and-tube heat exchanger using water as the phase change material (PCM) and a potassium formate/water solution as the heat transfer fluid (HTF). The dynamic melting concept is a new heat transfer enhancement technique which consists of recirculating the liquid PCM during the melting process with a pump and thus increasing the overall heat transfer coefficient as a result of the dominance of the forced convection. The HTF flow rate was kept constant at 1 l/min and four different PCM flow rates of 0, 0.5, 1 and 2 l/min were tested. Results from the experimental analysis showed enhancements up to 65.3% on the melting period, up to 56.4% on the effectiveness, and 66% on the heat transfer rates when the PCM flow rate was twice the HTF flow rate. From these experiments it can be concluded that dynamic melting is an effective technique for enhancing heat transfer during melting of PCM.

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confidence: 92%

Experimental investigation of the effect of dynamic melting in a cylindrical shell-and-tube heat exchanger using water as PCM

et al. 2017

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“…The experimental installation (López-Navarro et al, 2012;López-Navarro et al, 2013) is located at the Polytechnic University of Valencia (Spain). The set-up, which is shown in Fig.1, has been designed to characterize LHS systems within a temperature range from -10 to ºC.…”

Section: Installation and Measurement Proceduresmentioning

confidence: 99%

“…Basically, the installation consists of a heating and cooling circuit which allow to heat or cool the heat transfer fluid of the thermal storage tank. All of the components, as well as the uncertainty of the measurement equipment, have been presented in recent literature (López-Navarro et al, 2012;López-Navarro et al, 2013). For this reason, the present publication focuses in updating the recent modifications in the test bench.…”

Section: Installation and Measurement Proceduresmentioning

confidence: 99%

“…Their total length is of around 70 m in spirals of 17 turns. As in recent investigations (López-Navarro et al, 2012;López-Navarro et al, 2013), the tank has been tested at a partial load by blocking the top 16 coils with plumbing accessories for polyethylene pipes. Thus, the HTF only circulates through the bottom 18 coils, which are the only ones surrounded by the paraffin.…”

Section: Installation and Measurement Proceduresmentioning

confidence: 99%

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Experimental analysis of a paraffin-based cold storage tank

Torregrosa-Jaime¹,

López-Navarro²,

Corberán³

et al. 2013

International Journal of Refrigeration

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The aim of this study is to characterize a paraffin-based cold storage tank. Novel experimental results are presented for this system which combines a significant amount of paraffin (1450 kg) immersed around 18 spiral-shaped coils disposed in counter-current flow. The paraffin has a phase-change temperature in the range 4-8 ºC as measured by a 3-layer calorimeter. Different tests have been carried out with a constant mass flow rate and supply temperature. Around 31 % of the paraffin has hardly any contact with the coils and hereby acts as a dead mass. The results show the importance of natural convection within the phase-change-material, particularly during the melting process. The highest efficiency has been achieved for the lowest supply temperatures and mass flow rates of the heat transfer fluid.

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“…The better overall efficiency was obtained at the lowest supplied temperatures and mass flow rates. Lopez-Navarro et al [5,6] performed an experimental analysis of an internal melt-ice-on-coil system. The total refrigeration capacity of the installed set-up was 172 kWh.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of the Melting Process in a Shell and Coil Tube Ice Storage System for Air-Conditioning Application

et al. 2019

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Cold thermal energy storage, as a promising way of peak-shifting, can store energy by using cheap electricity during off-peak hours and regenerate electricity during peak times to reduce energy consumption. The most common form of cold storage air conditioning technology is ice on the coil energy storage system. Most of the previous studies so far about ice on coil cold storage system have been done experimentally. Numerical modeling appears as a valuable tool to first better understand the melting process then to improve the thermal performance of such systems by efficient design. Hence, this study aims to simulate the melting process of phase change materials in an internal melt ice-on-coil thermal storage system equipped with a coil tube. A three-dimensional numerical model is developed using ANSYS Fluent 18.2.0 to evaluate the dynamic characteristics of the melting process. The effects of operating parameters such as the inlet temperature and flowrate of the heat transfer fluid are investigated. Also, the effects of the coil geometrical parameters—including coil pitch, diameter, and height—are also considered. Results indicate that conduction is the dominant heat transfer mechanism at the initial stage of the melting process. Increasing either the inlet temperature or the flowrate shortens the melting time. It is also shown that the coil diameter shows the most pronounced effect on the melting rate compared to the other investigated geometrical parameters.

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Experimental investigations on the influence of ice floating in an internal melt ice-on-coil tank

Cited by 32 publications

References 15 publications

Experimental investigation of the effect of dynamic melting in a cylindrical shell-and-tube heat exchanger using water as PCM

Experimental investigation of the effect of dynamic melting in a cylindrical shell-and-tube heat exchanger using water as PCM

Experimental analysis of a paraffin-based cold storage tank

Numerical Modeling of the Melting Process in a Shell and Coil Tube Ice Storage System for Air-Conditioning Application

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