Korea Institute of Science and Technology

Yoon Pyo Lee

Kwang Ho Kim

Jae Hak Jeon

Young Il Kim

Kyung Ho Kim

Dae-Young Lee

Seo Young Kim

Ho-Young Kim

Jong Soo Jurng

Choon Soo Lee

Chun Sik Lee

Gwi Eun Song

Gwi-Eun Song

Hee Suk Han

Hung Tae Shin

Gui Eun Song

Si Y Choung

There is provided a micro power generator enhanced in efficiency and power generation output, and having an increased temperature range for operation. The micro power generator comprises: a high-temperature heat source; a low-temperature heat source; an enclosed body containing a working substance therein, the enclosed body being deformable by means of a phase change of the working substance between a first shape wherein heat can be transferred from the high-temperature heat source and a second shape wherein heat can be transferred to the low-temperature heat source; a permanent magnet constituting the enclosed body, the permanent magnet being maintained in a first position when the enclosed body has the first shape and in a second position when the enclosed body has the second shape; and a wire in which an electric current is induced by a movement of the permanent magnet. Further, the present invention provides an apparatus for producing a reciprocating movement between two heat sources having a temperature difference therebetween.

Micro power generator and apparatus for producing reciprocating movement

A micro-electro-mechanical generator is provided with a housing having a heat source and a heat sink opposite to the heat source in the housing. An upper diaphragm and a lower diaphragm separated from the upper diaphragm by a constant distance are further provided, which are deformable between a first position where the lower diaphragm is thermally connected to the heat source while the upper diaphragm being thermally shut off from the heat sink, and a second position where the upper diaphragm is thermally connected to the heat sink while the lower diaphragm being thermally shut off from the heat source. Further, the upper diaphragm and the lower diaphragm are adapted to generate electric energy whenever being deformed. A fluid chamber charged with working fluid is further provided, which has an upper end defined by the upper diaphragm, a lower end defined by the lower diaphragm and a lateral wall formed between the upper end and the lower end and having a configuration causing that a volume of the fluid chamber in the second position is larger than that of the fluid chamber in the first position.

Generator for use with a micro system having dual diaphragms

A micro-electro-mechanical generator has a liquid chamber, a heating block, an elongated elastic piezoelectric plate and a pair of electrodes. The liquid chamber is defined by bottom blocks which include the heating block and side walls, and can maintain a liquid. The heating block generates bubbles within the liquid chamber. The elongated elastic piezoelectric plate has a piezoelectric material layer, and is positioned in the liquid chamber adjacent to an upper portion of the heating block. The elongated elastic piezoelectric plate is deformable by contact with the bubbles, wherein a first end of the elongated elastic piezoelectric plate is a free end and a second end of the elongated elastic piezoelectric plate is a fixed end. The pair of electrodes are electrically connected to the piezoelectric material layer.

Microelectromechanical generator using bubbles

A micro-electro-mechanical generator has a housing, a heater, a cooler, a heat transfer member, a supporting member, and fluid. The heater is formed in the housing and the cooler is formed in the housing opposite to the heater. The heat transfer member is positioned between the heater and the cooler and is provided with a first surface facing the heater and a second surface facing the cooler. The supporting member supports the heat transfer member at an external portion of the heat transferring member and is deformable between a first position where the heat transferring member is positioned adjacent to the heater, and a second position where the heat transferring member is positioned adjacent to the cooler. The supporting member also partitions the housing into a sealed first space at a side of the heater and a second space at a side of the cooler. The fluid is charged in the sealed first space. Electric energy is obtained whenever the deformation of the supporting member provided with a piezoelectric element.

Generator for use in a microelectromechanical system

A method and apparatus for generating uniformly sized spherical ice particles. The apparatus comprises a water feed pump, a vacuum chamber connected to the water feed pump and having a water spray nozzle, boosters discharging the vapor from the vacuum chamber to maintain the inside of the vacuum chamber below a desired pressure and compressing it, a condenser for condensing the vapor being compressed by the boosters, and a vacuum pump for removing noncondensable gases from the condenser. The method comprises the steps of decreasing the pressure of the vacuum chamber below the first pressure, feeding water from the water source to the spray nozzle of the vacuum chamber, making spherical ices by spraying the water being fed from the nozzle into the inside of the vacuum chamber, in which the size of the droplets being sprayed is below a desired size, during said ice making step, maintaining the pressure of the vacuum chamber below the second pressure by discharging the vapor from the vacuum chamber and compressing the vapor to increase its saturation temperature above room temperature, condensing the compressed vapor within the condenser using water at room temperature as coolant, and draining the water being condensed during the condensing step and removing noncondensable gases.

Method and apparatus for making spherical ice particles

An adsorptional heat pump for using as a cooler or a heater which comprises a pair of rotary module discs and plurality of thermosyphons. The rotary module discs comprise a plurality of modules of which each of two modules are positioned in order to be opposite with each other. The thermosyphon is positioned between the two opposite modules, so that both ends thereof are respectively inserted into corresponding modules and has a good heat transferring feature, so that the thermosyphon provides an internal heat exchange between the modules. The heat pump according to the invention repeatedly and periodically carries out consequent processes such as generation. .fwdarw.heat exchange.fwdarw.adsorption.fwdarw.heat exchange.fwdarw.generation. The present invention can provide a heat pump having a promoted efficiency.

Rotating adsorption heat pump using thermosyphons for internal heat

Growing community of inventors

Seoul, South Korea

Yoon Pyo Lee