Jong-Min Shin

Bio: Jong-Min Shin is an academic researcher from LG Electronics. The author has contributed to research in topics: Supercooling & Linear compressor. The author has an hindex of 12, co-authored 38 publications receiving 571 citations.

Experimental Study on Frost Structure on Surfaces With Different Hydrophilicity: Density and Thermal Conductivity

Abstract: An experimental study has been conducted to investigate the effects of surface energy on frost formation. Test samples with three different surfaces of which dynamic contact angles (DCA) were 23, 55, and 88 deg were installed in a wind tunnel and exposed to a humid airflow. The airflow Reynolds number, humidity, the air and the cold plate temperatures were maintained at 9000, 0.0042 kg/kg', +12 and -22°C, respectively. The thickness and the mass of frost layer were measured and used to calculate frost density while heat flux and temperature profile were measured to obtain thermal conductivity. Exact positions of thermocouple junctions were verified by means of visualization system in order to increase accuracy. Results showed that frost density and thermal conductivity increase with time. The surface with a lower DCA showed a higher frost density and thermal conductivity during a two-hour test, but minor differences have been found after two hours of frost generation. Empirical correlations for thickness, mass deposition, density and thermal conductivity were proposed as the functions of test time and surface energy.

An experimental and numerical study on dynamic characteristic of linear compressor in refrigeration system

Abstract: This paper presents experimental and numerical results of the dynamic characteristic and COP of a linear compressor in a refrigeration system using R600 refrigerant. The numerical analysis consists of a model and a simulation that includes the linear compressor. In this study, the dynamic characteristic of the natural frequency of the linear compressor is validated by comparing the simulation results with the experimental results. To investigate the effect of system resonance on the performance of linear compressor, COP is evaluated under evaporator pressure in the range of 48.3–63.2 kPa abs, and condenser pressure in the range of 439.0–573.3 kPa abs. Based on the results, the system resonance at the TDC was varied within a range of 3% under the test conditions. COP and its sensitivity were found to vary within 3% according to the operating frequency of the system ranging from 48.5 to 51.5 Hz.

Refrigerator for managing food by using RFID

Abstract: Refrigerator for managing food by using RFID including a plurality of storage portions divided in the refrigerator for storing food, RFID devices each having storage information of each kind of food stored in the storage portions, and controller for reading the storage information and setting up the storage portion which maintains a storage condition suitable to the storage information read thus, thereby permitting easy storage of food in a storage portion having the storage condition by using the RFID device.

Refrigerator having user avatar display function

Abstract: A refrigerator is provided having a user avatar display function which can store avatars of each user, identify users, and display the avatars corresponding to the identified users. The refrigerator includes a photographing device that photographs images of users, a storing device that stores user information for identifying the users and avatar information having avatars corresponding to the users and/or user information, a display that displays the avatars, and a controller that reads the user information, compares the user information with the images of the users photographed by the photographing device, reads the avatar information according to the comparison result, and displays the avatars of the users included in the read avatar information on the display.

Surface engineering for phase change heat transfer: A review

Abstract: Owing to advances in micro- and nanofabrication methods over the last two decades, the degree of sophistication with which solid surfaces can be engineered today has caused a resurgence of interest in the topic of engineering surfaces for phase change heat transfer. This review aims at bridging the gap between the material sciences and heat transfer communities. It makes the argument that optimum surfaces need to address the specificities of phase change heat transfer in the way that a key matches its lock. This calls for the design and fabrication of adaptive surfaces with multiscale textures and non-uniform wettability. Among numerous challenges to meet the rising global energy demand in a sustainable manner, improving phase change heat transfer has been at the forefront of engineering research for decades. The high heat transfer rates associated with phase change heat transfer are essential to energy and industry applications; but phase change is also inherently associated with poor thermodynamic efficiency at low heat flux, and violent instabilities at high heat flux. Engineers have tried since the 1930s to fabricate solid surfaces that improve phase change heat transfer. The development of micro and nanotechnologies has made feasible the high-resolution control of surface texture and chemistry over length scales ranging from molecular levels to centimeters. This paper reviews the fabrication techniques available for metallic and silicon-based surfaces, considering sintered and polymeric coatings. The influence of such surfaces in multiphase processes of high practical interest, e.g., boiling, condensation, freezing, and the associated physical phenomena are reviewed. The case is made that while engineers are in principle able to manufacture surfaces with optimum nucleation or thermofluid transport characteristics, more theoretical and experimental efforts are needed to guide the design and cost-effective fabrication of surfaces that not only satisfy the existing technological needs, but also catalyze new discoveries.

Management and generation of dashboards

Abstract: A dashboard manager can be used to create, manage and deploy dashboards. Each dashboard can include one or more user interface elements (“widgets”). The dashboard manager can be invoked for providing a variety of management functions. In another aspect, dashboards, widgets and other content can be bundled together and distributed to users over a distribution channel. Users can created custom bundles using a tool that is provided for such purpose.

Management of User Interface Elements in a Display Environment

Abstract: A widget manager facilitates management of widgets in a dashboard layer. Management functions can include enablement, preview, importation, exportation, organization, installation, deletion, acquisition, etc.

Emerging Techniques for Assisting and Accelerating Food Freezing Processes─A Review of Recent Research Progresses

Abstract: Freezing plays an important role in food preservation and the emergence of rapid freezing technologies can be highly beneficial to the food industry. This paper reviews some novel food freezing technologies, including high-pressure freezing (HPF), ultrasound-assisted freezing (UAF), electrically disturbed freezing (EF) and magnetically disturbed freezing (MF), microwave-assisted freezing (MWF), and osmo-dehydro-freezing (ODF). HPF and UAF can initiate ice nucleation rapidly, leading to uniform distribution of ice crystals and the control of their size and shape. Specifically, the former is focused on increasing the degree of supercooling, whereas the latter aims to decrease it. Direct current electric freezing (DC-EF) and alternating current electric freezing (AC-EF) exhibit different effects on ice nucleation. DC-EF can promote ice nucleation and AC-EF has the opposite effect. Furthermore, ODF has been successfully used for freezing various vegetables and fruit. MWF cannot control the nucleation temperature, but can decrease supercooling degree, thus decreasing the size of ice crystals. The heat and mass transfer processes during ODF have been investigated experimentally and modeled mathematically. More studies should be carried out to understand the effects of these technologies on food freezing process.

Systems and Methods for Facilitating Consumer-Dispenser Interactions

Abstract: Embodiments of the invention can include systems and methods for facilitating consumer-dispenser interactions. In one embodiment, a product dispenser is provided. The product dispenser can include a reader configured to read machine readable item. In addition, the product dispenser can include a controller in communication with the reader, and operable to execute a set of instructions to receive information from the machine readable item associated with a consumer via the reader. Moreover, the controller can be further operable to execute a set of instructions to configure at least one characteristic based at least part on the information from the machine readable item, and dispense a product.