• Title/Summary/Keyword: refrigerator

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The Effect of Design Parameters on the Energy Efficiency of a TEM Refrigerator (열전모듈 냉장고의 에너지 효율에 미치는 설계인자의 영향)

  • Lee, Tae-Hee;Kim, Jin-Ho
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.14 no.3
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    • pp.29-34
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    • 2018
  • To present the design direction of the thermoelectric module (TEM) refrigerator, analysis of the effect of the design parameters on the energy efficiency and performance of the refrigerator is performed. The design parameters considered are the cooling capacity of the TEM and the heat transfer performance of the heating and cooling surface of the TEM. The heat transfer performance is the most effective design parameter for improving cooling power. The smaller ΔT and cooling capacity of the TEM make the higher efficiency of the refrigerator.

Development of Temperature control system for kimchi-refrigerator using fuzzy logic

  • Jung, Kwang Sik;No, Young Iun;Lim, Young Chel;Ryoo, Young Jae;Ahn, Min Tae
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.111.2-111
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    • 2002
  • The temperature of Kimchi-refrigerator is controlled by the wishing condition the original taste of Kimchi, the fast precocity of Kimchi. In this paper we studied the controlling temperature of Kimchi-refrigerator. The controlling temperature of Kimchi refrigerator is based on microcontroller which control On/Off. In this paper, Fuzzy logic was used to control the temperature of Kimchi-refrigeration. I will apply to fuzzy logic control to have simple rule control on the place of On-Off control system in the past. This device controls the in order to measure several temperature of two refrigeration plant in Kimchi refrigerator solenoid valve in refrigeration plant. A solenoid valve...

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Performance Tests of the Frozen Air Flows in a Refrigerator using PIV/POD Technique (PIV/POD 기법을 이용한 냉장고 냉기류 성능평가)

  • Kim, Kyung-Chun;Kim, Seok-Ro;Kim, Jong-Wook
    • 한국가시화정보학회:학술대회논문집
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    • 2007.11a
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    • pp.97-100
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    • 2007
  • A new evaluation method for the performance tests of the frozen air in a refrigerator using PIV(Particle Imaging Velocimetry) and POD(Proper Orthogonal Decomposition) techniques is introduced. A two-door refrigerator model was tested for the experiments. Actual temperature measurements were carried out for the drawer No.4 in refrigerator. By evaluating the characteristics of the interior flow of the refrigerator, an optimal shape of the drawer could be suggested through the PIV evaluation test. In this research, in order to find influences the turbulent kinetic energy contribution associated with the dynamic structures, we executed a POD analysis using the method of snapshots and the instantaneous fluctuating velocity field.

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Optimization of refrigerator machine room for energy saving (냉장고 기계실 유로 최적화를 통한 소비 전력 저감)

  • 김영국;한병윤;김재열;김태훈;이연원;김남식
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2002.05a
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    • pp.101-106
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    • 2002
  • In the Refrigeration and air conditioning industrial circles, refrigerator is demands a high degree of efficiency due to the Environmental Preservation Law. Many researchers are working on factors to improve the efficiency of the refrigerator In this paper, a study of the factors on the decrease of electric power consumption, several experiments are performed to improve the fluid flow in the refrigerator machine room. As a results, average temperatures of compressor and condenser are reduced 3.1$^{\circ}C$, 2.$0^{\circ}C$. The consuming electric power rate is reduced 0.7kWh/month.

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The Effect on Cabinet Deformation by Bead of Inner Case (가정용 냉장고의 냉동실 내벽의 비드가 케비넷 변형에 미치는 영향)

  • Cho, J.R.;Zhai, J.G.;Shin, M.G.;Kim, J.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2009.10a
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    • pp.427-428
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    • 2009
  • In the manufacture process of refrigerator cabinet, polyurethane(PU) liquid firstly is injected between outer plate and inner case in high temperature about $40^{\circ}C$, and PU foam is generated and solidified to the room temperature. There will be great residual stress in the PU foam, especially at the corners after the whole refrigerator is completely assembled. The stress condition will become more complicated under operating condition because of the large temperature difference between the freezing room and outer plate. And also, there are great differences of properties for plastic and steel which would cause different deformation under temperature gradient. The steel outer plate would expand compared to the PU foam or ABS material under operation condition, which induces a thermally bowing deformation in the refrigerator cabinet. The objective of this paper is to design an optimum bead structure or to use reinforcement in the refrigerator except for improving material properties in order to decrease the deformation.

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A Study on Development of Sound Quality Index of a Refrigerator Based on Human Sensibility Engineering (인공지능망을 이용한 냉장고 정상 가동 운전 상태의 음질 인덱스 개발)

  • 구진회;김중래;이은영;이상권
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.991-996
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    • 2004
  • The international competition in refrigerator markets has continuously required the research for sound quality of a refrigerator to improve the quality of a life. In this paper, A new method for evaluation of the sound quality of a refrigerator is developed based on human sensibility engineering by using ANN(Artificial neural network). Finally it is applied to evaluate the sound qualify of refrigerator on the production line.

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Effects of Design Parameters on Performance of the Stirling Refrigerator

  • Hong, Yon-Ju;Park, Seong-Je;Kim, Hyo-Bong;Park, Young-Don
    • Progress in Superconductivity and Cryogenics
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    • v.6 no.2
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    • pp.35-39
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    • 2004
  • The split-type free displacer Stirling refrigerators have been widely used for the cooling of infrared sensors and HTS filters. The thermodynamic and electric performance of the Stirling refrigerator is depending on the design and operating parameters. In the Stirling refrigerator with a free displacer, the refrigeration power is a function of the pressure wave in the expansion space, dynamics of a displacer, driving frequency, and etc.. In this study, the analysis of the small Stirling refrigerator was performed to investigate the effects of design parameters on the cooling capacity. The results show the effects of charging pressure, driving frequency, cold end temperature, natural frequency of a displacer and volume of expansion space on the performance of the Stirling refrigerator.

Simulation of Refrigerator Characteristics (냉장고 특성 시뮬레이션)

  • 문춘근
    • Journal of Advanced Marine Engineering and Technology
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    • v.22 no.2
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    • pp.181-189
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    • 1998
  • A general steady-state model for simulation on domastic refrigerator has been developed. The system model consists of various standard components such as evaporator compressor condenser capillary tube and cabinet. Cabinet is not system component but influence characteristic on domastic refrigerator. The purpose of this paper is to compare between characteristics of HFC 134a with CFC 12 in the domastic refrigerator and to predict the steady state cycle performance which is various specifications of cycle components under the continuous running conditions. As the results of simulation the coefficient of performance of both condenser and evaporator increases with increasing UA the increasing rate for condenser is greater than for evaporator.

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Numerical study on the machine room axial flow fan of a refrigerator (냉장고 기계실 축류홴 소음의 수치적 연구)

  • Jeon, Wan-Ho;Kim, Wook;Shin, Dae-Sig;Kim, Hyun-Joo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.1002-1006
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    • 2006
  • The noise of a refrigerator is consisted of the various flow noises of a refrigerator fan, a compressor and a condenser fan. The demands of high flow rate, compact space and low noise are to be accommodated, especially, in the case of a premium refrigerator. In this study, flow field, noise sources and flow noise are analyzed numerically and compared to the measured data. The flow field is calculated with 3-dimensional CFD solver - SC/Tetra, and the noise source and aeroacoustic noise is analyzed with FlowNoise S/W. Low noise axial fan can be developed by controlling the dominant noise source area.

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Effects of Charging Conditions on Evaporating Temperature for Diffusion Absorption Refrigerator (확산형 흡수식 냉장고에서 작동매체 충진조건이 증발온도에 미치는 영향)

  • 김선창;김영률;백종현;박승상
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.10
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    • pp.828-834
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    • 2003
  • A diffusion absorption refrigerator is a heat-generated refrigeration system. It uses a three-component working fluid consisting of the refrigerant (ammonia), the absorbent (water) and the auxiliary gas (hydrogen or helium). In this study, experimental investigations have been carried out to examine the effects of charging conditions of working fluids on the evaporating temperature for diffusion absorption refrigerator. Experimental parameters considered in the present experiments are charging concentration, solution charge and system pressure determined by auxiliary gas charged. As a result, in the charging condition of 35% of concentration and 20 kg$_{f}$cm$^2$ of system pressure, the system has the lowest evaporating temperature. It was found that there exists a minimum value of solution charge for the operation of diffusion absorption refrigerator.r.