Korea Institute of Energy Research

Jong Jae Cho

Beom Joon Lee

Ho Sang Ra

Gil Bong Lee

Jun Hyun Cho

Young Jin Baik

Hyung Ki Shin

Young-Jin Baik

Chul Woo Roh

Chui Woo Roh

Chulwoo Roh

Gil-bong Lee

Hyung-ki Shin

Bong Su Choi

The cooling system may dehumidify and cool the indoor air by using the ejector, the ejector membrane, the evaporation chamber, and the indoor dehumidifying membrane. In addition, the coefficient of performance of the cooling system may be improved by cooling the refrigerant using evaporation latent heat generated in the evaporation chamber by the suction force of the ejector and cooling the indoor air using the refrigerant. In addition, by using solar heat to generate high-temperature and high-pressure steam and supply the generated steam to the ejector, energy use efficiency may be improved. In addition, since the temperature of the steam generated in the steam generating portion may be lowered by arranging and using the two first and second ejectors in multiple stages, energy efficiency may be further improved by reducing the consumption of the heat source required for steam generation.

Cooling system using ejector and membrane

The present invention provides a partial admission operation turbine apparatus comprising: a rotor portion rotatably coupled to a rotary shaft of a turbine and including a plurality of rotor blades; a nozzle portion fixedly coupled to the rotary shaft in front of the rotor portion and guiding and supplying a working fluid to the rotor blades through a plurality of nozzle blades; and an inlet disk coupled to the rotary shaft in front of the nozzle portion in a plate shape and having a plurality of admission holes formed therein so as to supply the working fluid to the nozzle portion to partially admit the working fluid into the nozzle portion, wherein each of the admission holes is formed to have a different passage cross-sectional areas, so that the opening and closing of the admission holes are controlled according to operating flow rate conditions to control a partial admission ratio of the working fluid supplied to the nozzle portion. Due to the aforementioned feature, since continuous partial admission can be operated for a supercritical power generation system, it is possible to resolve the difficulties in designing and manufacturing turbines. Also, since the partial admission ratio can be adjusted according to operating conditions, it is possible to improve the performance of a turbine that is operated by continuous partial admission. Furthermore, even if the operating flow rate conditions change in the same cycle, it is possible to operate the same turbine with high efficiency.

Partial admission operation turbine apparatus for improving efficiency of continuous partial admission operation and method for operating turbine apparatus using same

According to the present invention, part of carbon dioxide heated by a heater is supplied to a dry gas seal portion of a compressor so that a device for pressurizing and heating a seal gas is not additionally required, configuration can be simplified and cost can be reduced. In addition, a seal gas flow path includes a low-temperature seal gas flow path and a high-temperature seal gas flow path so that, in an initial driving mode, carbon dioxide heated by a high-temperature portion of the heater is used as a seal gas and in a turbine-driving mode, carbon dioxide heated by a low-temperature portion of the heater is used as a seal gas and thus a more efficient operation can be performed.

Supercritical carbon dioxide power generation system including dry gas seal and method of operating the same

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Sejong-si, South Korea

Jong Jae Cho