Experimental study on the cooling charge and discharge characteristics of a PCM based fin-tube thermal energy storage exchanger

Hu, Wenju; Chang, Mo-ning; Gao, Yan; Zhang, Qunli; Yang, Lingyan; Li, Deying

doi:10.1016/j.proeng.2017.10.308

Cited by 8 publications

(5 citation statements)

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“…184,185 This is probably because the technology needed to configure fins is simple and easy to implement. The use of fins in thermal storage device design is very common.…”

Section: Adding Fins On the Container Sidementioning

confidence: 99%

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Review of latent thermal energy storage systems for solar air‐conditioning systems

et al. 2019

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Solar air conditioning is an important approach to satisfy the high demand for cooling given the global energy situation. The application of phase-change materials (PCMs) in a thermal storage system is a way to address temporary power problems of solar air-conditioning systems. This paper reviews the selection, strengthening, and application of PCMs and containers in latent thermal storage system for solar air-conditioning systems. The optimization of PCM container geometry is summarized and analyzed. The hybrid enhancement methods for PCMs and containers and the cost assessment of latent thermal storage system are discussed. The more effective heat transfer enhancement using PCMs was found to mainly involve micro-nano additives. Combinations of fins and nanoadditives, nanoparticles, and metal foam are the main hybrid strengthening method. However, the thermal storage effect of hybrid strengthening is not necessarily better than single strengthening. At the same time, the latent thermal storage unit has less application in the field of solar airconditioning systems, especially regarding heat recovery, because of its cost and thermal storage time. The integration of latent thermal storage units and solar air-conditioning components, economic analysis of improvement technology, and quantitative studies on hybrid improvement are potential research directions in the future.

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“…184,185 This is probably because the technology needed to configure fins is simple and easy to implement. The use of fins in thermal storage device design is very common.…”

Section: Adding Fins On the Container Sidementioning

confidence: 99%

“…The use of fins in thermal storage device design is very common. 184,185 This is probably because the technology needed to configure fins is simple and easy to implement. Common types of fins are longitudinal/rectangular, 186 circular/annular, 187 and plate fins.…”

Section: Adding Fins On the Container Sidementioning

confidence: 99%

Review of latent thermal energy storage systems for solar air‐conditioning systems

et al. 2019

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“…A PCM fin and tube heat exchanger was examined by Wen-ju Hu et al [39], and the study focused on the cooling charging and discharging characteristics of the thermal energy storage exchanger (TESE) using PCM. The heat transfer was enhanced with the addition of fins, and the PCM (RT5) was placed between the fins and the tubes.…”

Section: Fin and Tube Heat Exchangersmentioning

confidence: 99%

A PCM based cooling system for office buildings: a state of the art review

et al. 2019

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Cooling of air in buildings has a significant effect on thermal comfort and, consequently, productivity of office occupants. This study presents a state of the art review of energy efficient cooling systems that will provide occupants in buildings with satisfying thermal comfort. Using high-temperature cooling systems combined with renewable energy sources increases the energy efficiency in buildings. Latent heat thermal energy storage (LHTES) using Phase Change Materials (PCM) is a renewable energy source implemented in space cooling applications due to its high energy storage density. Since the share of commercial buildings in need of cooling is increasing, there is a need for developing new technical solutions in order to reduce the energy use without compromising thermal comfort. To this end, a proposed ventilation system, preliminarily analyzed in this paper, is expected to reduce further the energy use. The ventilation system is composed of an air handling unit, a 2-pipe active chilled beam system, and a cooling system including a LHTES using PCM. Few researchers have investigated chilled water air-conditioning systems that integrate a LHTES using PCM. In this review, function characteristics, possibilities and limitations of existing systems are discussed.

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“…The PCM charging time decreases with the increasing number of fins. Hu et al (2017) experimentally evaluated the thermal performance improvement of LHSS by using finned tube heat exchanger for melting and solidification processes of the PCM. Compared with finless heat exchanger, the cooling discharge rate of the PCM in finned tube heat exchanger for LHSS is higher than the charging rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fin Shape on Thermal Performance Enhancement of PCM-Based Low-Grade Heat Harnessing Exchanger

Jaffal¹,

Jaleel²

2022

Frontiers in Heat and Mass Transfer

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The phase change material (PCM)-based low-grade heat harnessing exchanger is used to study the recovering wasted energy from grey water. This experimental study investigated the effect of fin shape on improving the thermal performance of a PCM-based low-grade heat harnessing exchanger. Three heat exchangers of equal dimensions, namely, finless, inclined finned and V-shaped finned heat exchangers, were manufactured and tested in a container containing the PCM. A finless heat exchanger was adopted as a base case to demonstrate the improvement of heat transfer by using fins. The finless heat exchanger consists of two serpentine tubes where the cold water and grey water flow in a counter flow arrangement. A series of experimental tests was conducted for the three exchangers with similar operational conditions for both PCM process (melting and solidification). Compared with the finless heat exchanger, the results show that the addition of the fins remarkably enhances the heat transfer between the heat exchanger and PCM in the two processes. The inclined fins are superior than the V-shaped fins in enhancing thermal performance. Compared with the finless heat exchanger, the heat transfer improvement in melting process is reached about 187.49% and 149.88% for heat exchanger with the inclined and V-shaped fins, respectively. The reduction in the solidification time is approximately 3 times higher than the reduction in the melting time for inclined fins and approximately 2.85 times for the V-shaped fins. Increasing the mass flow rates of grey water and cold water accelerates the melting and solidification of the PCM, and this acceleration is obvious in solidification.

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Experimental study on the cooling charge and discharge characteristics of a PCM based fin-tube thermal energy storage exchanger

Cited by 8 publications

References 0 publications

Review of latent thermal energy storage systems for solar air‐conditioning systems

Review of latent thermal energy storage systems for solar air‐conditioning systems

A PCM based cooling system for office buildings: a state of the art review

Effect of Fin Shape on Thermal Performance Enhancement of PCM-Based Low-Grade Heat Harnessing Exchanger

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