Development of paraffin wax as phase change material based latent heat storage in heat exchanger

Abdulrahman, Ruslan S.; Ibrahim, Farah A.; Dakhil, Sadoun

doi:10.1016/j.applthermaleng.2018.12.149

Cited by 45 publications

(19 citation statements)

References 5 publications

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“…The classifications of phase change materials (PCMs) include eutectics, organic, and inorganic materials. Most studies focus on organic materials due to their large heat storage capacity, different phase-change temperatures, and low cost [ 3 , 4 ]. A PCM for thermal energy storage was prepared by Osterman et al [ 5 ] for heating and cooling purposes to save energy.…”

Section: Introductionmentioning

confidence: 99%

Thermal Charging Optimization of a Wavy-Shaped Nano-Enhanced Thermal Storage Unit

et al. 2021

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A wavy shape was used to enhance the thermal heat transfer in a shell-tube latent heat thermal energy storage (LHTES) unit. The thermal storage unit was filled with CuO–coconut oil nano-enhanced phase change material (NePCM). The enthalpy-porosity approach was employed to model the phase change heat transfer in the presence of natural convection effects in the molten NePCM. The finite element method was applied to integrate the governing equations for fluid motion and phase change heat transfer. The impact of wave amplitude and wave number of the heated tube, as well as the volume concertation of nanoparticles on the full-charging time of the LHTES unit, was addressed. The Taguchi optimization method was used to find an optimum design of the LHTES unit. The results showed that an increase in the volume fraction of nanoparticles reduces the charging time. Moreover, the waviness of the tube resists the natural convection flow circulation in the phase change domain and could increase the charging time.

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Section: Introductionmentioning

confidence: 99%

Thermal Charging Optimization of a Wavy-Shaped Nano-Enhanced Thermal Storage Unit

et al. 2021

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“…Paraffin is activated by applying heat. The activation time depends on the time required for heat supply to and distribution within the paraffin [ 18 , 19 , 20 ]. Paraffin has a significant volume increase when transformed from the solid state to the liquid state.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Study for Electrothermally Deep-Sea Drive Microunits Using a Paraffin Phase Change Material

Ning

Liang

et al. 2021

Micromachines

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Considering the further exploration of the ocean, the requirements for deep-sea operation equipment have increased. Many problems existing in the widely used deep-sea hydraulic system have become increasingly prominent. Compared with the traditional deep-sea hydraulic system, actuators using a paraffin phase change material (PCM) have incomparable advantages, including lightweight structure, low energy consumption, high adaptability to the deep sea, and good biocompatibility. Thus, a deep-sea drive microunit (DDM) based on paraffin PCM is proposed in this paper. The device adopts a flexible shell, adapting to the high-pressure environment of the deep-sea based on the principle of pressure compensation. The device realizes the output of displacement and force through the electrothermal drive, which can be used as actuator or power source of other underwater operation equipment. The microunit successfully completes the functional verification experiments in air, shallow water, and hydrostatic pressure of 110 MPa. In accordance with experimental results, a reasonable control curve is fitted, highlighting its potential application in deep-sea micro electro mechanical systems, especially in underwater soft robot.

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“…Nevertheless, solar energy is timeliness and periodic, which are the main drawbacks of its use. Phase change material (PCM) with high latent heat can absorb solar energy and release heat to indoor environment through phase change . Previous studies have shown that adding paraffin provided a great benefit to the thermal performance of applications of glazed window, roof, wall, chimney, and other fields …”

Section: Introductionmentioning

confidence: 99%

“…Phase change material (PCM) with high latent heat can absorb solar energy and release heat to indoor environment through phase change. [20][21][22] Previous studies have shown that adding paraffin provided a great benefit to the thermal performance of applications of glazed window, [23][24][25][26][27][28][29] roof, [30][31][32] wall, 33,34 chimney, 35,36 and other fields. [37][38][39][40] Goia 23 demonstrated that adding PCM into glazed windows can utilize the solar energy effectively.…”

Section: Introductionmentioning

confidence: 99%

Seasonal thermal performance analysis of glazed window filled with paraffin including various nanoparticles

et al. 2020

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Summary A two‐dimensional heat transfer model was proposed to numerically investigate the effect of enriching phase change material (PCM) with different kinds of nanoparticles on thermal performance of glazing windows in different seasons of the year. The results were presented in terms of liquid fraction of PCM, inner surface temperature and temperature difference between interior and exterior surfaces of glass window, and their occurrence times. The results showed that adding nanoparticles into PCM can promote the melting and solidification processes, extend the total time of PCM being in the liquid state, and raise the internal surface temperature of glass. However, in summer season, the internal surface temperature decreases and the total melting time respectively reduces by 7 and 1.5 minutes by introducing TiO2 and ZnO nanoparticles into PCM. Furthermore, the introduced nanoparticles do not have the same effect on the thermal performance of the window unit. While the inner surface temperature decreases by 0.82 K in summer by addition of TiO2 to PCM, it increases by 0.84 K in transition season and 0.89 K in winter season by utilizing ZnO nanoparticles. Although the nano‐PCM remains in the solid state in winter, the existence of nanoparticles can still increase the inner surface temperature.

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Development of paraffin wax as phase change material based latent heat storage in heat exchanger

Cited by 45 publications

References 5 publications

Thermal Charging Optimization of a Wavy-Shaped Nano-Enhanced Thermal Storage Unit

Thermal Charging Optimization of a Wavy-Shaped Nano-Enhanced Thermal Storage Unit

Design and Performance Study for Electrothermally Deep-Sea Drive Microunits Using a Paraffin Phase Change Material

Seasonal thermal performance analysis of glazed window filled with paraffin including various nanoparticles

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