Analysis of energy saving performance for household refrigerator with thermal storage of condenser and evaporator

Cheng, Wen‐Long; Ding, Miao; Yang, Xudong; Han, Bing-Chuan

doi:10.1016/j.enconman.2016.11.029

Cited by 57 publications

(15 citation statements)

References 20 publications

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“…For Method B, with Equations (11) and (16), fin base temperature can be obtained as shown by Equation (21).…”

Section: Temperature Of the Fin Basementioning

confidence: 99%

“…Using Equations (12) and (16), the heat transfer through HWHE and thermal resistance in condition B can be obtained as Equations (27) and (28).…”

Section: Heat Transfer and Thermal Resistancementioning

confidence: 99%

“…Raiyani et al [12] studied the effect of geometrical parameters on the condenser's heat transfer performance by changing the point contact between the tube and plate to line contact by wrapping the plate on the tube; the temperature distribution analysis was conducted in ANSYS 14 with experiment validations. To improve the household refrigerator's performance, a novel shape-stabilized phase change material (PCM) base hot-wall condenser for household refrigerator was presented in several studies [13][14][15][16], and theoretical and experimental research was carried out which showed that the novel refrigerator could increase the energy efficiency by~12% with only little increase in cost.…”

Section: Introductionmentioning

confidence: 99%

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A Fast Prediction Model for Heat Transfer of Hot-Wall Heat Exchanger Based on Analytical Solution

Jia

Nie

et al. 2018

Applied Sciences

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The hot-wall heat exchanger (HWHE) has been widely used in thermal engineering fields such as ceiling radiant heating/cooling, refrigerator condenser, solar heat collection, and high-temperature heat recovery. However, the numerical simulation normally used for heat transfer prediction in HWHE is usually not as convenient as the analytic solutions in engineering applications. In this paper, a new heat transfer mathematical model of HWHE-based on analytic solutions was developed, which could be much faster to obtain the heat transfer properties of HWHE. The proposed model was validated under four conditions with literature values, which showed that the deviations of heat flux are 2.53%, 0.99%, 2.12%, and 1.96%, indicating its accuracy is satisfied. The model was then used to analyze the thermal property of HWHE. The results show the thermal resistance caused by panel with heat convection and conduction accounts for 96.54% of HWHE thermal resistance, and the thermal resistance caused by heat convection on the surface of panel is 74.43%. The analyzation results also show that adding aluminum foil around pipes could decrease HWHE thermal resistance by 5.11%. Besides, the influence of pipe diameters, pipe distance, pipe heat conductivity, side wall heat conductivity, and convective heat transfer coefficient on the heat transfer performance of HWHE was analyzed. The research in this paper can be used for fast prediction and optimization of heat transfer in HWHE.

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“…For Method B, with Equations (11) and (16), fin base temperature can be obtained as shown by Equation (21).…”

Section: Temperature Of the Fin Basementioning

confidence: 99%

“…Using Equations (12) and (16), the heat transfer through HWHE and thermal resistance in condition B can be obtained as Equations (27) and (28).…”

Section: Heat Transfer and Thermal Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Fast Prediction Model for Heat Transfer of Hot-Wall Heat Exchanger Based on Analytical Solution

Jia

Nie

et al. 2018

Applied Sciences

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“…Energy savings in the use of refrigerators in various purposes is very important. Many studies about it, among others [17,18]. Energy savings calculation was conducted based on the implementation of ozone generate system applied in refrigerator.…”

Section: Energy Saving Calculationmentioning

confidence: 99%

Study of Energy Saving for Fish Preservation by Refrigeration SystemBased on Ozone Technology

Nur¹,

Firdausi²,

Susan³

et al. 2018

IJET

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Research on ozone application to extend the shelf life of fresh fish in the refrigerator has been done. Refrigerators where fresh fish deposits are ozone fed through piping systems. Ozone is produced by using Dielectric Barrier Discharge Plasma (DBDP) reactor. The refrigerator has 3 compartments and 1 freezer that has a total volume of 400 L. Ozone loading was done 2 times a day. Ozone can be evenly distributed at 6 mg/L at each compartemnts and freezer. Ozone will last for 60 minutes in the refrigerator. A refrigerator of the same type (but not ozonezed) is provided to place the fish as a control. The fish used in both refrigerators was mackerel fish. The quality of fish were controled by Total Volatile Base Nitrogen (TVBN) and Trimethyl Amin nitrogen (TMA-N) using INS 2354.8: 2009 standard. The freshness of fish was determined through organaleptic number by using INS 01-2729.1-2006 standard. The results of this study reported that the ozonized refrigerator can maintain the quality of fish in a longer timeframe.The results showed that the value of the fish in the refrigerator TVBN powered ozone standards are still maintained in the range of fresh fish in accordance with INS, which is below the value of 30. While the value TVBN in fish stored in a refrigerator is not energized ozone tends to be higher than those fed ozone, TVBN value in fish stored in the refrigerator without ozone wasperishable on the 12th day of each compartment, reaching 30, except in the freezer compartment. On the 16th day, through comparasion of fish freshness (TVBN value), refrigerator not powered by ozone can only be represented by fish stored in the freezer at tempertaure of-9.28 0 C. On the 16th day, energy consumed by refrigerator not powered by ozonewas 34.26 kWh (or 2.66 US $) compared to 9.23 kWh (or 0.72 US $) for refrigerator powered by ozone. These results indicate a huge energy savings by utilizing ozone in the refrigerator. The savings was up to 73%. I. INTRODUCTION Approximately 7.9 millions ton diesel oils was consumed by about 1,06 million fishing vessel in China per year[1]. It should be noted that more than 50% energy was also used to drive cooling system for ice making and air conditioning considering that about 1 ton of fish requires 1.5-2.0 ton ice. Prevention of bacterial growth and freshness damage of fishery harvested due to extra-cold temperature usually conducted at the range room temperature between-1 ᵒC to 0 ᵒC[2]. Storage of fish in cold storage is generally carried out at negative temperatures well below water freezing temperature. Storage at this temperature consumes a lot of electrical energy. Therefore, a breakthrough for operating cold storage at temperatures above zero is urgently needed. Several attempts have been made by researchers to meet those needs. A number of engineering technology has been developed to minimize the use of fuel and reduce operating costs for the fishermen. Hoang et al have used superchilling technology to raise the shelf temperature for salmon in the refrigerator [3]. The combinati...

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“…Recently, an increasing number of new technologies have been applied for breaking this chain. Cheng et al designed a heat storage evaporator and cold storage condenser for a household refrigerator, and its energy saving ratio was 32% [10]. Clito et al enhanced the heat dissipation of a household refrigerator.…”

Section: Introductionmentioning

confidence: 99%

Investigation on an Improved Household Refrigerator for Energy Saving of Residential Buildings

Cao

Wang

et al. 2020

Applied Sciences

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The efficiency improvement of household refrigerators is of significance to electricity consumption reduction of residential buildings. The cold loss recovery in household refrigerators is a promising development direction. In this study, a refrigerator improved by heat pipes is designed to reduce the cold loss at freezer walls to enhance the overall efficiency of the refrigerator. A complete steady-state mathematical model is built for characterizing its overall energy saving behaviors by introducing the real structural parameters of a Midea BCD-111 refrigerator and measured temperature boundary conditions. The performances of the improved refrigerator are investigated with typical operating states, variable ambient temperature, and heat pipe design. The simulative results indicate that the cold loss of the freezer of the improved refrigerator can be reduced by 8.3–16.5%, and the energy saving capability is relatively reliable. Results verify that the cold loss recovery of the improved refrigerator is feasible in various operating conditions.

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Analysis of energy saving performance for household refrigerator with thermal storage of condenser and evaporator

Cited by 57 publications

References 20 publications

A Fast Prediction Model for Heat Transfer of Hot-Wall Heat Exchanger Based on Analytical Solution

A Fast Prediction Model for Heat Transfer of Hot-Wall Heat Exchanger Based on Analytical Solution

Study of Energy Saving for Fish Preservation by Refrigeration SystemBased on Ozone Technology

Investigation on an Improved Household Refrigerator for Energy Saving of Residential Buildings

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