Abstract: A DC power supply device includes: a rectifier circuit; a reactor connected at one end to one output terminal of the rectifier circuit; a charging unit including a first and second switching element connected in series between another end of the reactor and another output terminal of the rectifier circuit, the charging unit configured to charge a first and second capacitor connected in series between output terminals to which a load is connected; and a control unit that controls the charging unit. The control unit sets, based on the timing at which the zero-crossing occurs, a dead time in which both the and second switching element are off, and when states of the first and second switching element at a time of occurrence of the zero-crossing match a predetermined set of states, reverses the states of the first switching element and the second switching element.

Abstract: A humidifying device for transferring water and/or water vapour from waste air of a waste air flow to supply air of a supply air flow is provided. In the compensating chamber of the housing of the humidifying device, at least one spreading means is arranged, which spreads apart the plate stack of the humidifying device and the housing cover closing the housing in the direction of the longitudinal axis.

Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, a flow switching device, an indoor heat exchanger, a pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, a bypass pipe, a flow control device provided to the bypass pipe and configured to adjust a flow rate of refrigerant flowing through the bypass pipe, an evaporating pressure sensor configured to measure an evaporating pressure of the refrigerant, and a controller. The air-conditioning apparatus is configured to operate in a normal heating operation mode and a heating-defrosting operation mode. When an operation associated with the normal heating operation mode is switched to an operation associated with the heating-defrosting operation mode, the controller adjusts an opening degree of the flow control device using the evaporating pressure in the parallel heat exchanger and a driving frequency of the compressor.

Abstract: A modular data center and a method of building a modular data center. The modular data center includes a site microgrid including at least one power converter connected to a direct current (DC) bus and a digital power system. The digital power system includes at least one digital power transmitter, a set of transmission lines, and at least one digital power receiver. The modular data center design uses an adiabatic cooling system to cool the modular data center.

Abstract: Provided are a refrigerator and a control method thereof. The refrigerator is characterized by enabling at least a part of a refrigerator door to be selectively transparent by a user's operation, such that the user sees through an inside of the refrigerator while the refrigerator door is closed.

Abstract: Systems and methods for cooling a datacenter are disclosed. In at least one embodiment, an absorption chiller includes a generator vessel to enable removal of heat from fluid returned from at least one computing component of the datacenter.

Abstract: A refrigerator is provided. The refrigerator includes a main body including a first door, a door opening device configured to open the first door, a first proximity sensor disposed adjacent to the first door, a first infrared sensor disposed on the first door, and at least one processor, wherein the at least one processor is configured to, based on detection data obtained by the first proximity sensor, control the door opening device to open the first door based on an external object approaching within a threshold distance from the refrigerator, and based on the external object being identified based on detection data obtained by the first infrared sensor while the first door is open, control the door opening device to stop opening of the first door.

Abstract: A multiple-circuit heating and cooling system includes a first refrigeration circuit having a first condenser and a first evaporator and a second refrigeration circuit having a second condenser and a second evaporator. The first condenser and the second condenser are arranged in a first row split configuration, and the second condenser is downstream of the first condenser relative to a first air flow directed across the second condenser and the first condenser. Additionally, the first evaporator and the second evaporator are arranged in a second row split configuration, and the first evaporator is downstream of the second evaporator relative to a second air flow directed across the first evaporator and the second evaporator.

Abstract: Provided are a refrigerator and a control method thereof. The refrigerator is characterized by enabling at least a part of a refrigerator door to be selectively transparent by a user's operation, such that the user sees through an inside of the refrigerator while the refrigerator door is closed.

Abstract: A thermal management system includes a cooling unit, a condenser, and a processor. The processor is located within a server, and the system also includes a phase change cooling device in thermal communication with the processor, and in fluid communication with the condenser. The system also includes a single phase cooling device in thermal communication with the phase change cooling device, and in fluid communication with the liquid cooling unit. The system also includes a temperature sensor in thermal communication with the single phase cooling device, and a fluid pump to move fluid between the liquid cooling unit and the single phase cooling device. A TEC device may also be implemented between the phase change cooling device and the single phase cooling device.

Abstract: A cryopump includes a cryopanel disposed in a cryopump housing and including a non-combustible adsorbent, a heater heating the non-combustible adsorbent and the cryopanel, a purge valve connecting the cryopump housing to a purge gas source, a rough valve connecting the cryopump housing to a rough pump, a sensor that generates a measurement signal indicating a temperature of the non-combustible adsorbent or an internal pressure of the cryopump housing, and a controller that controls at least one of the heater, the purge valve, and the rough valve based on the measurement signal so as to execute either a sublimation regeneration sequence for sublimating water from the non-combustible adsorbent by exposing the non-combustible adsorbent to a vacuum atmosphere or a dehydration sequence for dehydrating the non-combustible adsorbent by exposing the non-combustible adsorbent to a dry atmosphere at room temperature or a temperature higher than the room temperature.

Abstract: A refrigerator includes: a cabinet and a door configured to open and close the cabinet. The door includes a cap decoration defining an upper surface of the door and having an opening; an outer plate defining a front appearance of the door and including a display configured to indicate operation information; a door liner coupled to the outer plate and defining a rear surface of the door; an insulating material filled between the outer plate and the door liner; an inner case coupled to the outer plate and the cap decoration inside of the door and including an accommodating space that communicates with the opening; and a display assembly inserted through the opening from an outside of the door and disposed inside of the case, and the cap decoration includes a case inserting portion into which the inner case is inserted and restrained.

Abstract: A drain harness for a device with a drain. The drain harness may define at least a portion of one or more through openings. The drain harness may include one or more electrical wirings. The drain harness may include one or more electrical components. The drain harness may be flexible or flexed between one or more configurations. The drain harness may include one or more caps and/or seal mechanisms.

Abstract: In a method for separating argon by cryogenic distillation, in which a flow containing argon, oxygen and nitrogen and being more rich in argon than the air is sent to a distillation column, and an argon-rich gas flow is withdrawn at the top of the column, a portion of the argon-rich gas flow is mixed with beads to form a gas mixture containing beads, the beads being capable of adsorbing oxygen in the presence of argon at the column operating temperatures; the portion of the argon-rich gas flow mixed with the beads is condensed and then sent to the top of the column; and a bottom liquid containing beads is withdrawn from the column and treated to remove the beads, the beads removed being regenerated to remove the adsorbed oxygen and being again mixed with the argon-rich gas flow.

Abstract: A redundancy shut-off system for a datacenter liquid cooling system is disclosed. The redundancy shut-off system has a first ball valve located above a datacenter platform and coupling between a row manifold of a secondary cooling loop and a rack manifold of a rack, where the first ball valve provides redundancy to a second ball valve located below the datacenter platform.

Abstract: A humidity control element includes a plurality of flat plate members stacked in a state where a first flow path or a second flow path is formed in each space between the flat plate members. Heat is exchangeable between the first flow path and the second flow path via the flat plate members. Each of the flat plate members is formed of any one material of a resin, paper, glass, a metal, and a ceramic, a metal organic framework MIL-101 (Cr) containing chromium as a metal is held on any one of an inner surface of the first flow path and an inner surface of the second flow path, and a switching time between a dehumidification operation and a regeneration operation is relatively long.

Abstract: Provided is a technology of searching for operation guidance for efficiently operating a liquefied natural gas plant. An operation guidance searching method for a liquefied natural gas plant includes: acquiring data sets of operation data of process variables for a plurality of target devices and disturbance data; generating, through machine learning, a plant model indicating correspondences of output values of process variables with respect to manipulated variables and input values of disturbances; and searching, through reinforcement learning, for input values of the manipulated variables operation variables for with which a compression power per unit production amount is minimized under a condition in which an outlet temperature of a liquefied natural gas is a preset restriction temperature or lower.

Abstract: A dehumidifier includes a machine body having a dehumidification function and a water tank including a receiving cavity. The dehumidifier has a working state, in which the machine body is directly above the water tank and the receiving cavity receives water formed by dehumidification by the machine body.

Abstract: A refrigerator includes a cabinet defining a storage chamber, a drawer door configured to be inserted into and withdrawn out of the storage chamber, a driving device provided at the door part, an elevation device provided at the drawer part and having a scissors lift assembly, and a connecting assembly that couples the driving device to the scissors lift assembly to transfer driving force from the driving device to the scissors lift assembly. The elevation device is configured, based on being uncoupled from the connecting assembly, to be separable from the drawer part, and the elevation device includes a restricting unit configured to restrict the scissors lift assembly from unfolding when the elevation device is separated from the drawer part. The drawer door includes a drawer part and a door part that is configured to, based on the drawer door being inserted into the storage chamber, close the storage chamber.

Abstract: A cooler includes a heat radiating member and a cover member that form a coolant flow path. The heat radiating member has a first surface on which an object to be cooled is disposed. The heat radiating member includes multiple fin members protruding into the coolant flow path from a second surface of the heat radiating member. The second surface of the heat radiating member is a part of a surface of the coolant flow path. The cover member includes a trap part in which multiple recesses are formed in a portion of an inner surface of the cover member being another part of the surface of the coolant flow path outside a protruding direction of the fin members.