Abstract: A system for ventilation, dehumidification, and cooling includes an outdoor unit dehumidifying and cooling introduced outside air; and an indoor unit connected to the outdoor unit to perform ventilation, in which the outdoor unit includes a dehumidification rotor, an evaporative cooler, an evaporative condenser, a ventilation damper, a heating unit, and a controller operating and stopping at least one of the dehumidification rotor, the evaporative cooler, the evaporative condenser, the ventilation damper, or the heating unit.

Abstract: A ring segment and a turbomachine including the ring segment are provided. The ring segment installed on an inner circumferential surface of a casing and disposed to face an end of a blade existing inside the casing, the ring segment includes a segment body disposed inside the casing in a radial direction of the casing and having a channel through which cooling air flows, and a pair of segment protrusions protruding outward from the segment body, coupled to the inner circumferential surface of the casing, and spaced apart from each other along a flow direction of fluid flowing through the casing to form an RS cavity through which cooling air flows, wherein the segment body includes a cavity for supplying cooling air introduced from the RS cavity to the channel.

Abstract: Provided is an air conditioning system. The air conditioning system includes a heat pump provided to heat or cool a circulating refrigerant, an air heating device provided to burn a fuel so as to heat circulating water so that air is heated by the heated water, and an intermediate heat exchanger provided to exchange heat between the refrigerant and the water.

Abstract: A ring segment and a turbomachine including the ring segment are provided. The ring segment installed on an inner circumferential surface of a casing and disposed to face an end of a blade existing inside the casing, the ring segment includes a segment body disposed inside the casing in a radial direction of the casing and having a channel through which cooling air flows, and a pair of segment protrusions protruding outward from the segment body, coupled to the inner circumferential surface of the casing, and spaced apart from each other along a flow direction of fluid flowing through the casing to form an RS cavity through which cooling air flows, wherein the segment body includes a cavity for supplying cooling air introduced from the RS cavity to the channel.

Abstract: A ring segment and a turbomachine including the ring segment are provided. The ring segment installed on an inner circumferential surface of a casing and disposed to face an end of a blade existing inside the casing, the ring segment includes a segment body disposed inside the casing in a radial direction of the casing and having a channel through which cooling air flows, and a pair of segment protrusions protruding outward from the segment body, coupled to the inner circumferential surface of the casing, and spaced apart from each other along a flow direction of fluid flowing through the casing to form an RS cavity through which cooling air flows, wherein the segment body includes a cavity for supplying cooling air introduced from the RS cavity to the channel.

Abstract: A ring segment having improved cooling efficiency is provided. The ring segment may include a shield plate mounted to a casing which accommodates a turbine and configured to face an inner wall of the casing, a pair of hooks configured to protrude from the shield plate toward the casing to be coupled to the casing, a cavity defined between the shield plate and the pair of hooks, a plurality of first cooling passages configured to connect the cavity and first side surfaces facing each other of the shield plate, and a plurality of second cooling passages configured to connect the cavity and second side surfaces facing each other of the shield plate, wherein the first cooling passages extend in a longitudinal direction of a central axis of the turbine, and the second cooling passages extend in a circumferential direction of the turbine.

Abstract: A ring segment and a turbomachine including the ring segment are provided. The ring segment installed on an inner circumferential surface of a casing and disposed to face an end of a blade disposed inside the casing, the ring segment includes a segment body disposed inside the casing in a radial direction of the casing and including a plurality of cooling channels through which cooling air flows, a pair of segment protrusions protruding outward from the segment body, coupled to the inner circumferential surface of the casing, and spaced apart from each other in a flow direction of fluid flowing through the casing to form an RS cavity into which cooling air is introduced, wherein when the segment body has a cross section along an imaginary plane including a radial straight line of the casing, the cooling channel is formed such that a width in a direction perpendicular to a radial direction of the casing is greater than a width in the radial direction of the casing.

Abstract: A ring segment and a turbomachine including the ring segment are provided. The ring segment installed on an inner circumferential surface of a casing and disposed to face an end of a blade existing inside the casing, the ring segment includes a segment body disposed inside the casing in a radial direction of the casing and having a channel through which cooling air flows, and a pair of segment protrusions protruding outward from the segment body, coupled to the inner circumferential surface of the casing, and spaced apart from each other along a flow direction of fluid flowing through the casing to form an RS cavity through which cooling air flows, wherein the segment body includes a cavity for supplying cooling air introduced from the RS cavity to the channel.

Abstract: A ring segment and a turbomachine including the ring segment are provided. The ring segment installed on an inner circumferential surface of a casing and disposed to face an end of a blade disposed inside the casing, the ring segment includes a segment body disposed inside the casing in a radial direction of the casing and including a plurality of cooling channels through which cooling air flows, a pair of segment protrusions protruding outward from the segment body, coupled to the inner circumferential surface of the casing, and spaced apart from each other in a flow direction of fluid flowing through the casing to form an RS cavity into which cooling air is introduced, wherein when the segment body has a cross section along an imaginary plane including a radial straight line of the casing, the cooling channel is formed such that a width in a direction perpendicular to a radial direction of the casing is greater than a width in the radial direction of the casing.

Abstract: A ring segment, a turbine, and a gas turbine having improved cooling performance are provided. The ring segment may include a shielding wall mounted to a turbine casing which accommodates a turbine blade and configured to face an inner circumferential surface of the turbine casing, a first hook part and a second hook part configured to protrude from the shielding wall toward the turbine casing to be coupled to the turbine casing, a main cavity formed between the first hook part and the second hook part, a plurality of first cooling passages configured to connect the main cavity and first side surfaces facing each other of the shielding wall, a plurality of second cooling passages configured to extend in a direction crossing the first cooling passage and connect the main cavity and second side surfaces facing each other of the shielding wall, and a chamber configured to be connected to the first cooling passages.

Abstract: A ring segment having improved cooling efficiency is provided. The ring segment may include a shield plate mounted to a casing which accommodates a turbine and configured to face an inner wall of the casing, a pair of hooks configured to protrude from the shield plate toward the casing to be coupled to the casing, a cavity defined between the shield plate and the pair of hooks, a plurality of first cooling passages configured to connect the cavity and first side surfaces facing each other of the shield plate, and a plurality of second cooling passages configured to connect the cavity and second side surfaces facing each other of the shield plate, wherein the first cooling passages extend in a longitudinal direction of a central axis of the turbine, and the second cooling passages extend in a circumferential direction of the turbine.

Abstract: A system for ventilation, dehumidification, and cooling according to an exemplary embodiment in the present disclosure may include an outdoor unit dehumidifying and cooling introduced outside air; and an indoor unit connected to the outdoor unit to perform ventilation, in which the outdoor unit includes a dehumidification rotor, an evaporative cooler, an evaporative condenser, a ventilation damper, a heating unit, and a control module operating and stopping at least one of the dehumidification rotor, the evaporative cooler, the evaporative condenser, the ventilation damper, or the heating unit.

Abstract: A ring segment having improved cooling efficiency is provided. The ring segment may include a shield plate mounted to a casing which accommodates a turbine and configured to face an inner wall of the casing, a pair of hooks configured to protrude from the shield plate toward the casing to be coupled to the casing, a cavity defined between the shield plate and the pair of hooks, a plurality of first cooling passages configured to connect the cavity and first side surfaces facing each other of the shield plate, and a plurality of second cooling passages configured to connect the cavity and second side surfaces facing each other of the shield plate, wherein the first cooling passages extend in a longitudinal direction of a central axis of the turbine, and the second cooling passages extend in a circumferential direction of the turbine.

Abstract: A turbine vane improves cooling performance by guiding an impingement cooling fluid, introduced through a cooling hole of an inner sidewall provided inside the turbine vane, to flow while in contact with an inner surface of the turbine vane for a relatively long time. The turbine vane includes an outer sidewall configured to form an airfoil comprising a leading edge and a trailing edge; an inner sidewall disposed inside the outer sidewall to form a gap between the inner sidewall and an inner surface of the outer sidewall, the inner sidewall having a plurality of cooling holes communicating with the gap; and a plurality of spiral guides formed on the inner surface of the outer sidewall and disposed at positions facing the respective cooling holes, the plurality of spiral guides configured to guide a cooling fluid having passed through the cooling holes to impinge on the spiral guides.

Abstract: A ring segment having improved cooling efficiency is provided. The ring segment may include a shield plate mounted to a casing which accommodates a turbine and configured to face an inner wall of the casing, a pair of hooks configured to protrude from the shield plate toward the casing to be coupled to the casing, a cavity defined between the shield plate and the pair of hooks, a plurality of first cooling passages configured to connect the cavity and first side surfaces facing each other of the shield plate, and a plurality of second cooling passages configured to connect the cavity and second side surfaces facing each other of the shield plate, wherein the first cooling passages extend in a longitudinal direction of a central axis of the turbine, and the second cooling passages extend in a circumferential direction of the turbine.

Abstract: Disclosed is a display apparatus including: a display; a communicator configured to communicate with an external apparatus; and a processor configured to receive a first image and a second image from the external apparatus through the communicator, identify a region corresponding to the display within the first image, extract an image corresponding to the identified region from the second image, and process the extracted image to be displayed on the display.

Abstract: The non-volatile memory device includes a memory cell array including a plurality of memory cells and a voltage generator configured to supply a voltage to the memory cell array. The voltage generator includes a charge pump circuit, a switching circuit, and a stage controller. The charge pump circuit includes a plurality of pump units and is configured to output a pump voltage and a pump current in accordance with a number of pump units that have received an input voltage among the plurality of pump units. The switching circuit is configured to output the pump voltage. The stage controller is configured to receive an input signal corresponding to the pump current and perform a stage control operation of generating a stage control signal for controlling the number of pump units to be driven.

Abstract: There are provided a method of operating a voltage generator. The method includes providing a reference voltage, sensing a magnitude of a charge current for increasing voltages of a plurality of word lines based on the reference voltage, determining whether the sensed magnitude of the charge current is greater than a peak current value, increasing the reference voltage in accordance with a first slope when the sensed magnitude of the charge current is less than or equal to the peak current value, and increasing the reference voltage in accordance with a second slope less than the first slope when the detected magnitude of the charge current is greater than the peak current value.

Abstract: A ring segment, a turbine, and a gas turbine having improved cooling performance are provided. The ring segment may include a shielding wall mounted to a turbine casing which accommodates a turbine blade and configured to face an inner circumferential surface of the turbine casing, a first hook part and a second hook part configured to protrude from the shielding wall toward the turbine casing to be coupled to the turbine casing, a main cavity formed between the first hook part and the second hook part, a plurality of first cooling passages configured to connect the main cavity and first side surfaces facing each other of the shielding wall, a plurality of second cooling passages configured to extend in a direction crossing the first cooling passage and connect the main cavity and second side surfaces facing each other of the shielding wall, and a chamber configured to be connected to the first cooling passages.

Abstract: A turbine blade ring segment includes an inner panel mounted to an inner surface of a turbine casing, the inner panel including a plurality of flow holes for supplying cooling air from an outside of the turbine casing; and an outer panel disposed on one surface of the inner panel, the outer panel including a plurality of air passages communicating with the flow holes formed in the inner panel. The passages include a first flow passage formed in a central portion of the outer panel to guide the supplied cooling air in a flow direction of the combustion gas, a second flow passage formed in the outer panel separately from the first flow passage to guide the supplied cooling air in the flow direction of the combustion gas, and a third flow passage communicating with the second flow passage to feed the supplied cooling air to the second flow passage.