Numerical (CFD) and experimental analysis of hybrid household refrigerator including thermoelectric and vapour compression cooling systems

Söylemez, Engin; Alpman, Emre; Onat, Ayhan; Yukselenturk, Y.; Hartomacıoğlu, Selim

doi:10.1016/j.ijrefrig.2019.01.007

Cited by 32 publications

(12 citation statements)

References 35 publications

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“…Large eddy simulation (LES) is an important means for studying turbulent motion. It has been used in many studies to analyze turbulence under simple geometries and boundary conditions [47][48][49]. Due to the large computational cost, LES has not been widely applied in engineering.…”

Section: Methodsmentioning

confidence: 99%

Temperature Distribution in Insulated Temperature-Controlled Container by Numerical Simulation

Xia

Wei

et al. 2020

Energies

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Cold-storage containers are widely used in cold-chain logistics transportation due to their energy saving, environmental protection, and low operating cost. The uniformity of temperature distribution is significant in agricultural-product storage and transportation. This paper explored temperature distribution in the container by numerical simulation, which included ventilation velocity and the fan location. Numerical model/numerical simulation showed good agreement with experimental data in terms of temporal and spatial air temperature distribution. Results showed that the cooling rate improved as velocity increased, and temperature at 45 min was the lowest, when velocity was 16 m/s. Temperature-distribution uniformity in the compartment became worse with the increase in ventilation velocity, but its lowest temperature decreased with a velocity increase. With regard to fan energy consumption, the cooling rate of the cooling module, and temperature-field distribution in the product area, velocity of 12 m/s was best. Temperature standard deviation and nonuniformity coefficient in the container were 0.87 and 2.1, respectively, when fans were located in the top four corners of the container. Compared with before, the average temperature in the box was decreased by 0.12 °C, and the inhomogeneity coefficient decreased by more than twofold. The results of this paper provide a better understanding of temperature distribution in cold-storage containers, which helps to optimize their structure and parameters.

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Section: Methodsmentioning

confidence: 99%

Temperature Distribution in Insulated Temperature-Controlled Container by Numerical Simulation

Xia

Wei

et al. 2020

Energies

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“…The work efficiency of hybrid energy systems using thermoelectric generators has been investigated [30,31]. The optimal location for the thermoelectric refrigerator was simulated using numerical analysis [32]. It was stated that it is important to operate these refrigerators flexibly by supplying them with different voltages under various working conditions to ensure energy efficiency and high cooling performance.…”

Section: Literature Reviewmentioning

confidence: 99%

Improvement of Criteria for Assessing the Energy Efficiency of Thermoelectric Refrigerators Used in Supply Chains

Filin

Filina-Dawidowicz

2021

Energies

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Refrigerators play an important role in perishable goods supply chains and are expected to operate efficiently. Thermoelectric refrigerators need specific criteria for assessing their energy efficiency. The existing criteria do not take into account the insulation properties of a refrigerator cabinet, which results in a low credibility of the assessment of energy parameters of thermoelectric coolers. The aim of the research was to develop and approve a new universal criterion for assessing the energy efficiency of stationary thermoelectric refrigerators used in supply chains. It was proposed to replace the known criterion of specific power consumption with a new indicator Pk, that takes into account the overall thermal transfer coefficient of the refrigerator cabinet. Based on experimental studies, the approval of the proposed indicator was carried out on the example of a comparative analysis of four thermoelectric refrigerators from different manufacturers. The indicator application resulted in changes in ranking of the examined refrigerators. It was found that the proposed criterion allows us to assess the effectiveness of a thermoelectric cold source more adequately, including the electric power supply and temperature control system. The research results may constitute guidelines for the design and application of standards for assessing the effectiveness of thermoelectric refrigerators.

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“…Also, second-order for pressure and second-order upwind discretization was used for momentum, and turbulent kinetic energy while first-order discretization was considered for the turbulent dissipation rate. The thermophysical properties of the materials in the fluid and solid regions of the computational domain were specified as shown in Table 5 [21]. No-slip condition was assumed at all the walls except the fan interface-plane, where pressure jump of 17.56 Pa was considered according to the data provided by the manufacturing company [23].…”

Section: Numerical Scheme and Boundary Conditionsmentioning

confidence: 99%

“…Few studies investigated the effect of hybridization of both thermoelectricity, and vapor-compression technologies in household refrigerators. One research [21] presented a numerical and experimental investigation of hybrid household-refrigerator (HHR) with three compartments; one of them was cooled by TER. The investigation focused on the energy consumption of the hybrid refrigerator when the TER was located at different positions inside the hybrid refrigerator.…”

Section: Introductionmentioning

confidence: 99%

Effect Of Position and Design Parameters of a Fan-Cooled Cold Side Heat Sink of a Thermoelectric Cooling-Module on The Performance of a Hybrid Refrigerator

Mesalhy

Gawad

2021

ARFMTS

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This paper presents a CFD and experimental study of the thermal behavior of the thermoelectric-compartment in a hybrid household-refrigerator that combines thermoelectric and vapor-compression technologies. The hybrid refrigerator has three compartments. One of them is driven by a thermoelectric cooling system, which was made of one Peltier module and two fan-cooled heat sinks mounted on the hot and cold sides. The simulation results were compared with experimental measurements and showed a good agreement. The performance of the thermoelectric refrigerator was tested with changing the pushing direction. Two pushing directions for the fan were examined. In the first one (direction-I), the fan was fixed such that it sucked the air beside the cold heat sink. While in the second direction (direction-II), the fan was assumed to be flipped to push the air over the cold-side heat sink. The results showed that the second fan direction (direction-II) is more effective for heat transfer mechanism between the cold-side heat sink and the inside air of the thermoelectric-compartment.

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Numerical (CFD) and experimental analysis of hybrid household refrigerator including thermoelectric and vapour compression cooling systems

Cited by 32 publications

References 35 publications

Temperature Distribution in Insulated Temperature-Controlled Container by Numerical Simulation

Temperature Distribution in Insulated Temperature-Controlled Container by Numerical Simulation

Improvement of Criteria for Assessing the Energy Efficiency of Thermoelectric Refrigerators Used in Supply Chains

Effect Of Position and Design Parameters of a Fan-Cooled Cold Side Heat Sink of a Thermoelectric Cooling-Module on The Performance of a Hybrid Refrigerator

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