Numerical and experimental investigation on the thermal insulation performance of low temperature cold box

Feng, Yu; Li, Yanzhong; Zhu, Yinhai

doi:10.1016/j.icheatmasstransfer.2009.05.008

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…Under a range of pressure and shielding conditions, an analysis was conducted on the thermal insulation performance and the coupled heat transfer between radiation and conduction. The results indicated that a heat insulation baffle could significantly improve the thermal insulation performance 9 . Gospavić et al developed a mathematical model of heat transfer from the surrounding environment to a single food package, evaluating the effect of temperature on the food in a single packaging unit 10 .…”

Section: Introductionmentioning

confidence: 99%

“…The results indicated that a heat insulation baffle could significantly improve the thermal insulation performance. 9 Gospavi c et al developed a mathematical model of heat transfer from the surrounding environment to a single food package, evaluating the effect of temperature on the food in a single packaging unit. 10 Wang et al evaluated the thermal insulation performance of a simple cooling box composed of WBF and EPS sandwich panels.…”

Section: Introductionmentioning

confidence: 99%

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Study on the effect of aluminium foil on packaging thermal insulation performance in cold chain logistics

2022

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This study developed a mathematical model to analyse the effect of aluminium foil on packaging thermal insulation performance in cold chain logistics. The maximum insulation time (MIT) was adopted to quantify the thermal insulation performance of the packaging boxes. The heat penetration rate of the insulation box was verified through the ice melting test. The numerical relationship between the MIT and the phase-change material (PCM) complete melting time was obtained, and the thermal insulation performance of different insulation boxes was further studied. The results showed, when k = 0.5593 and C = À3.4614, the mathematical model was in good agreement with the thermal insulation performance of the packaging box. It demonstrated that the method of linear fitting the MIT through the PCM complete melting time effectively assessed the thermal insulation performance of the packaging with aluminium foil. Moreover, the thermal insulation performance of adding aluminium foil to the inner surface of the insulating material outperformed the outer surface.An increase of 25.39% and 4.03% in MIT was obtained from adding aluminium foil to the inner surface and the outer surface compared with the insulating material without aluminium foil. Adding aluminium foil to the double-sided surface of the insulating material achieved more significant insulation performance. The MIT increased by 28.70% and 2.64%, respectively, compared with the material without aluminium foil and adding aluminium foil to the inner surface of the insulating material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the effect of aluminium foil on packaging thermal insulation performance in cold chain logistics

2022

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“…The storage time of the cold box refers to the time from putting the refrigerant into the cold box to the end of phase change of the refrigerant. [23] The refrigerant in the cold box is described from an energy balance as follows: [19]…”

Section: Theoretical Model Of Storage Timementioning

confidence: 99%

“…The discrete ordinate (DO) radiation model in Fluent software covers the entire optical thickness and can solve the surface-to-surface (S2S) radiation. Zhao et al [22] and Yu et al [23] found that adding a DO radiation mode in Fluent could more accurately simulate the thermal insulation performance of the cold box. However, Wu [24] used the S2S radiation In this research, the theoretical modeling of storage time with radiation heat transfer is established, and the influences of radiation heat transfer and sensible heat on the cold box are analyzed.…”

Section: Introductionmentioning

confidence: 99%

Theoretical modeling and verification of storage time of cold box based on network method of radiation heat transfer

Liu

Duan

et al. 2023

Numerical Heat Transfer, Part A: Applications

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The storage time of cold box is an important subject. At present, the research method of the storage time is mainly experiment, and the theoretical research is incomplete. Therefore, in this work, a theoretical modeling combined with a network method of radiation heat transfer, shape factor of heat conduction, and sensible heat of refrigerant was proposed to calculate the storage time of a cold box at various ambient temperatures and amounts of refrigerant. The experimental and simulation results were used to verify the theoretical modeling of the storage time.

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“…The study suggests fumed silica as a filling material, where the suggested silica material has a thermal conductivity of about 0.004 W m −1 K −1 at room temperature. Another material consideration was employed by Yu, Li and Zhu (2009) where thermal performance of insulation was investigated through the walls of a low temperature cold box. The results of their testing indicate that a reflective heat shield significantly reduced heat losses by up to 18%.…”

Section: Introductionmentioning

confidence: 99%

Improving Energy Efficiency and Environmental Sustainability of Commercial Insulation

Manoosingh¹,

Mihelcic²,

Gunaratne³

2015

EER

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With increasingly stringent energy standards set in place by the Department of Energy, energy efficiency is becoming a paramount concern to manufacturers of appliances. Additionally, the production and disposal of the voluminous amount of polyurethane foam commonly utilized as insulation in refrigeration units poses a significant environmental challenge. In this context, this study investigated an alternative insulation for use in commercial refrigerator/freezer units. A prototype exploring the use of evacuated packets of pyrogenic silica substituting for conventional insulation was assessed. Assessment criteria included experimental comparison of heat transfer characteristics and the energy efficiency of the new insulation as well as its life cycle as it is related to environmental sustainability. Results indicate that in the new insulation design applied to the unit's cover, heat flux decreased by an average of 36%, and energy efficiency improved by 5.1% over a 24 hour period. The new insulation design also resulted in improved environmental sustainability, resulting in a savings of 0.257 metric tons of CO 2 e over 20 years for a single unit. Results provide an alternative insulation design for use in commercial refrigerator and freezers, and a framework by which to assess the efficiency and environmental performance of similar products.

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Numerical and experimental investigation on the thermal insulation performance of low temperature cold box

Cited by 9 publications

References 9 publications

Study on the effect of aluminium foil on packaging thermal insulation performance in cold chain logistics

Study on the effect of aluminium foil on packaging thermal insulation performance in cold chain logistics

Theoretical modeling and verification of storage time of cold box based on network method of radiation heat transfer

Improving Energy Efficiency and Environmental Sustainability of Commercial Insulation

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