Comparison of the performance of ice-on-coil LTES tanks with horizontal and vertical tubes

Awasthi, Abhishek Kumar; Kumar, Binit; Kim, Min Ho; Lee, Yong Tae; Chung, Jae Dong; Kim, Seon Tae; Lee, Changkyong; Lee, Keun-Hui

doi:10.1016/j.enbuild.2018.10.034

Cited by 23 publications

(3 citation statements)

References 14 publications

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“…Experimental integration of hybrid solar powered cooling systems with ice in office buildings has been found to reduce the annual energy consumption by 38%, with a 40% reduction in CO 2 emissions [6]. The focus of recent research is also on the enhancements of ice TES systems that use a threefluid heat exchange module [7], aligned carbon nanotubes under an external magnetic field [8], and different heat source positions and configurations to increase the system's performance [9,10]. Withal, knowledge about the thermal properties of pure and sea ice is very important in the view of the current climate crisis.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Bošnjak,

Jurčević,

Bodrožić Ćoko

et al. 2023

Energies

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This paper reports an experimental investigation of the thermal properties of frozen tap, demineralized, and sea water. The presented research assists in a better understanding of the thermal properties of ice and the processes within it and contributes regarding the generation of novel experimental data. The thermal conductivity was measured in a range from −14 °C to −33 °C using the Transient Plane Source (TPS) method. Ice blocks were placed in an expanded polystyrene box in the freezer, which is where the measurements took place. The thermal conductivity of the tap water ice was observed to vary in a range from 1.915 ± 0.005 Wm−1K−1 at −14 °C to 2.060 ± 0.004 Wm−1K−1 at −33 °C. The values obtained for the ice made of demineralized water differed by less than 10%. The thermal conductivity of the sea ice was shown to be more temperature dependent, with the values ranging from 1.262 ± 0.005 Wm−1K−1 at −14 °C to 1.970 Wm−1K−1 ± 0.004 at −33 °C. A noticeable fall in the thermal conductivity of the sea ice was observed in the temperature range from −26 °C to −19 °C. A possible reason for this could be the increased precipitation of salt in that temperature range. Measurements of thermal diffusivity displayed similar trends as those of thermal conductivity. Specific volumetric heat capacity was indirectly calculated.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Bošnjak,

Jurčević,

Bodrožić Ćoko

et al. 2023

Energies

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“…Thermal conductivities were improved by 32.76% and 33.23% at 50 • C. Moreover, structure variation is another way to improve overall heat transfer performance. Abhishek et al [16] investigated and analysed the charging and discharging working process of an ITS system. It was indicated that tube diameter, orientation, and outlet location had a great influence on the performance of thermal storage system.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Heat Transfer Behaviours of Melting Process for Ice Thermal Storage Based on Various Heat Source Configurations

Zhang¹,

Chai²,

Fan

et al. 2022

Sustainability

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Ice thermal storage (ITS) performance for cooling systems is greatly influenced by the poor thermal conductivity of phase change material (PCM). The effect of natural convection on the melting process is significant for heat transfer enhancement. Thus, the melting performance of PCM in a shell-and-tube latent heat storage (STLHS) unit is numerically studied by considering natural convection in terms of various heat source positions and configurations, i.e., central position, eccentric position, and flat-tube type. Temperature distribution, melting time, and the overall heat transfer coefficient during the process are investigated. The results show that the circulation vortex formed by natural convection is a dominant factor that affects melting front evolution and the overall heat transfer coefficient. When input heat flux is relatively weak, PCM below the heat source is liquefied first. In contrast, PCM in the upper part melts earlier when the heat flux is excellent. The overall heat transfer coefficient decreases sharply with the increase in melting time in the early stage. Then, the heat transfer coefficient tends to be constant. PCM in an STLHS unit with a heat source in a lower position and a configuration of vertical flat-tube type has a desirable performance when compared with other cases, which could provide good support for ITS application.

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“…The low-temperature refrigerant flowing in the coil (usually ethylene glycol solution) transfers heat with the water outside the pipe to reduce the temperature of the water and freeze when it is lower than 0 ℃ . Awasthi Abhishek et al [2] studied the influence of coil arrangement direction on cold storage performance. The results show that the heat release performance of ice coil arranged in vertical direction is 30.15% more than that arranged in horizontal direction.…”

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confidence: 99%

Effect of material characteristics on ice storage performance of an external melting ice-on-coil tube

Jiaying¹,

Zheng²,

Chang³

et al. 2022

Preprint

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Comparison of the performance of ice-on-coil LTES tanks with horizontal and vertical tubes

Cited by 23 publications

References 14 publications

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Numerical Analysis of Heat Transfer Behaviours of Melting Process for Ice Thermal Storage Based on Various Heat Source Configurations

Effect of material characteristics on ice storage performance of an external melting ice-on-coil tube

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