Experimental study on melting enhancement of phase change material in a vertical cylindrical latent heat storage using a short concentric helical heat transfer tube

Punniakodi, Banumathi Munuswamy Swami; Senthil, Ramalingam

doi:10.1016/j.est.2021.102879

Cited by 20 publications

(5 citation statements)

References 45 publications

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“…Researchers such as Saydam 68 and Punniakodi 69 have developed spiral coil type PCM heat storage devices and conducted analyses on their heat storage performance under various conditions. These studies have demonstrated that the use of spiral pipes can greatly enhance the uniformity and speed of PCM melting.…”

Section: Heat Exchange Medium Flow Channel Reinforced Heat Exchangementioning

confidence: 99%

Progress in the Study of Enhanced Heat Exchange in Phase Change Heat Storage Devices

et al. 2023

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In comparison with sensible heat storage devices, phase change thermal storage devices have advantages such as high heat storage density, low heat dissipation loss, and good cyclic performance, which have great potential for solving the problem of temporal and spatial imbalances in the transfer and utilization of heat energy. However, there are also issues such as the small thermal conductivity of phase change materials (PCMs) and poor efficiency in heat storage and release, and in recent years, enhanced heat transfer in phase change thermal storage devices has become one of the research hotspots for optimizing thermal storage devices. Although there have been reviews of enhanced heat transfer technology for phase change thermal storage devices in the literature, there is still insufficient research on the summarization of the enhanced heat transfer mechanism, structural optimization, and applications of phase change thermal storage devices. This Review provides a review of enhanced heat transfer in phase change thermal storage devices from two aspects: internal structure enhanced heat transfer and heat exchange medium flow channel enhanced heat transfer. It summarizes the enhanced heat transfer measures of various types of phase change thermal storage devices and discusses the role of structural parameters in enhanced heat transfer. It is hoped that this Review will provide some references for scholars engaged in research on phase change thermal storage heat exchangers.

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Section: Heat Exchange Medium Flow Channel Reinforced Heat Exchangementioning

confidence: 99%

Progress in the Study of Enhanced Heat Exchange in Phase Change Heat Storage Devices

et al. 2023

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“…The results exhibited that the optimum working conditions for annular fins are low inlet temperatures and moderate mass flow rates. Punniakodi and Senthil 26) used a modified heat transfer tube to examine the PCM melting inside a vertical container. They stated that the intake temperature of HTF is an important factor for melting the PCM.…”

Section: Introductionmentioning

confidence: 99%

“…To examine the thermal performance of PCM, many researchers used various heat exchanger models with fins in the cylindrical LHS units 1,17,[22][23][24]26,[28][29][30][31]35,36) . Thus, it can be concluded from the literature that few researchers used heat exchangers with fins in the rectangular LHS unit 34,37,38) .…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Stearic Acid in the Thermal Battery Comprising a Fin and Tube Heat Exchanger

Saini¹,

Chandrashekara²

2023

Evergreen

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Phase change materials (PCM) are employed in thermal energy storage (TES) systems for various applications due to their high energy density. This paper uses a fin and tube heat exchanger made of aluminium and copper in the thermal battery to enhance the heat transfer rate. The HYTHERM 600 is used as the heat transfer fluid (HTF), and stearic acid as the PCM. The experiment analyses the thermal behaviour of stearic acid in the thermal battery. The HTF maintains around 80°C and 85°C in the Hot HTF tank. Results show that conduction is dominant during the early melting stages; however, natural convection supersedes conduction after the stearic acid has liquefied. Conduction serves as the main mechanism of heat transfer during the discharging. The HTF temperature considerably enhances the stearic acid melting rate. The energy storage while charging and discharging is 248.03 kJ/kg and 211.81 kJ/kg, 254.50 kJ/kg, and 218.35 kJ/kg at 80 o C and 85 o C hot HTF temperatures. As the HTF temperature increases from 80 o C to 85 o C, the charging efficiency and higher temperature increase by 8.03% and 6.76%, and the melting time drops by 18.19% during the melting process, but in the discharging of stearic acid, discharging efficiency and lower temperature increases by 6.92% and 7.06%, and discharging time decreases by 25%.

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“…The organic PCM is less corrosive when compared to metallic and eutectic PCM's [11] . The significant research on storage container geometry has been published for the past three decades and the review is well elaborated in the article [12] . The vertical cylindrical containers and multi-tube arrays are considered to be the best with large heat transfer surface area and predominant natural convection [12] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mobilized Cold Thermal Energy Storage System for Free Cooling of Residential small office Building

Sundarababu

Anandan

Kanchana

2023

Preprint

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A novel mobilized cold thermal storage system (M-CTES) incorporating phase change material (PCM) shell and tube heat exchangers is proposed to transfer cold energy from hilly regions to plain areas for free cooling of residential and small office buildings. The M-CTES system uses 100 kg of paraffin-based PCM with melting points of 19°C and 21°C packed in a shell and tube heat exchanger. The transient temperature variation of PCM, heat transfer fluid (HTF), and room were monitored, and heat dissipation and absorption, accumulation of energy, and efficiency of the charging-discharging process were evaluated to study the thermal behaviour of the MCTES system. Charging experimental trials were conducted at five different temperatures 14°C, 16°C, 17°C 18°C, and 20°C with varied mass flow rates of HTF at 200, 250, 300, and 350 CFM. As a result, charging time decreases with an increase in mass flow rate of HTF with the freezing time of 140 °C, which is 105 minutes for 350 CFM and 120 minutes for 200 CFM. The charging efficiency increases with an increase in the mass flow rate of HTF such as at 140~̵̊C being 92% for 350 CFM and 80% for 200 CFM. The discharging experimental trials at 240 ̊C and 220~̵̊C with varying ambient temperatures of 260 °C, 300 °C, 130 °C, and 140 °C with a constant mass flow rate of air at 200 CFM.

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Experimental study on melting enhancement of phase change material in a vertical cylindrical latent heat storage using a short concentric helical heat transfer tube

Cited by 20 publications

References 45 publications

Progress in the Study of Enhanced Heat Exchange in Phase Change Heat Storage Devices

Progress in the Study of Enhanced Heat Exchange in Phase Change Heat Storage Devices

Experimental Investigation of Stearic Acid in the Thermal Battery Comprising a Fin and Tube Heat Exchanger

Experimental Study on Mobilized Cold Thermal Energy Storage System for Free Cooling of Residential small office Building

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