Abstract: In one embodiment, a cooling system may include a thermosyphon cooler that cools a cooling fluid through dry cooling and a cooling tower that cools a cooling fluid through evaporative cooling. The thermosyphon cooler may use natural convection to circulate a refrigerant between a shell and tube evaporator and an air cooled condenser. The thermosyphon cooler may be located in the cooling system upstream of, and in series with, the cooling tower, and may be operated when the thermosyphon cooler is more economically and/or resource efficient to operate than the cooling tower. According to certain embodiments, factors, such as the ambient temperature, the cost of electricity, and the cost of water, among others, may be used to determine whether to operate the thermosyphon cooler, the cooling tower, or both.

Abstract: An active seal arrangement operably connected to a radiator and condenser of a vehicle. The arrangement includes at least one movable seal. The seal is selectively movable between a closed, air-restricting position and an open, air-passing position. The seal is pivotably connected to either the radiator or the condenser. Alternatively, the movable seal is slidably attached to a side wall fitted between the radiator and the condenser. A position controller operably connected to at least one sensor regulates the position of the seal. The seal is moved to its closed, air-restricting position during times of high condenser load such as when idling or when the vehicle is operated at very low vehicle speeds during hot weather. The seal is moved to its open, air-passing position during high powertrain cooling demand such as in hot weather, when ascending a grade, or when towing a large trailer or payload.

Abstract: Cooling control methods include measuring a temperature of at least one component of each of multiple nodes and finding a maximum component temperature across all such nodes, comparing the maximum component temperature to a first and second component threshold and comparing the air temperature to a first and second air threshold, and controlling a proportion of coolant flow and a coolant flow rate to the air-to-liquid heat exchanger and the nodes based on the comparisons.

Abstract: A fluid line insertion guide for a refrigerator includes a collet adapted for engagement with a fluid line. The collet includes a biased end and an insertion end. The fluid line is inserted through a fluid line aperture defined within the biased end. The insertion end is configured to be inserted into a fluid valve to a final insertion depth to place the fluid line and fluid valve in communication with each other. A fluid line guide includes a retaining channel and a biasing surface. The retaining channel engages a valve housing to define a guide position. When the fluid line guide is in the guide position, the biasing surface is disposed a predetermined distance from a valve aperture of the fluid valve and further defines a position of the biased end of the collet and the final insertion depth of the insertion end into the fluid valve.

Abstract: In one aspect, thermal energy storage systems are described herein. In some embodiments, a thermal energy storage system comprises a thermal energy storage system comprising a container and a heat exchange apparatus disposed within the container. The heat exchange apparatus comprises a tank, a manifold at least partially disposed within the tank, and a phase change material disposed within the tank and in thermal contact with the manifold.

Abstract: A refrigeration cycle device for a vehicle has a compressor, a first pump, a high-pressure side heat exchanger, a heating medium-outside air heat exchanger, and a controller. The compressor draws and discharges a refrigerant. The first pump draws and discharges a first heating medium. The high-pressure side heat exchanger heats the first heating medium by exchanging heat between a high-pressure refrigerant discharged from the compressor and the first heating medium. The heating medium-outside air heat exchanger exchanges heat between the first heating medium and outside air. The controller controls operation of the compressor and the first pump. The controller activates the first pump when an activation request of the compressor is made. The controller activates the compressor, after activating the first pump, when it is determined or estimated that a temperature of the first heating medium is lower than or equal to a first predetermined value.

Abstract: The heat exchanger includes a cool conduit (2,3), a hot conduit (4) and a heat exchanging element (1) arranged between the cool conduit (2,3) and the hot conduit (4). The heat exchanger also includes at least one further conduit (3,2) arranged next to the cool conduit (2,3) or to the hot conduit (4) on a same side of the heat exchanging element (1) as said respective cool or hot conduit. The further conduit is separated from the respective cool or hot conduit by a separator (5) that includes two separating elements (51,52) arranged at a distance to each other and forming a cavity (53) between the two separating elements (51,52). The separator restricts a fluid flow into or in the cavity (53) such as to limit a heat exchange between the further conduit (3,2) and the respective cool or hot conduit on the same side of the heat exchanging element (1).

Abstract: A heat pump device includes an inverter control unit for controlling an inverter. The inverter control unit includes a constraint-energization control unit that, during operation standby of a compressor, determines whether heating to the compressor is necessary, on the basis of a refrigeration stagnation amount in the compressor, and, when having determined that heating to the compressor is necessary, selects, according to the refrigeration stagnation amount, any one of direct-current energization for supplying a direct-current voltage to the motor and high-frequency energization for supplying a high-frequency voltage having a frequency higher than a frequency during a normal operation to the motor, so as to output a constraint energization command for carrying out constraint energization of the motor; and a driving-signal generating unit that generates a driving signal on the basis of the constraint energization command.

Abstract: A thermal management system for a electronics cabinets having an electronics heat source therein. The thermal management system includes a first passive thermal device having an evaporator portion and a condenser portion. The thermal management system can also include a heat sink in contact with air inside the cabinet and in thermal contact with the evaporator portion of the first passive thermal device, wherein the heat sink is contained within the sealed cabinet. The condenser portion of the first passive thermal device can be in contact with a liquid to liquid heat exchanger.

Abstract: A cooling-abnormality detecting system in which a heat generating component and a cooling component contact each other via a contact section, and the cooling component cools the heat generating component. The cooling-abnormality detecting system includes: a heat-generating-component-temperature detecting sensor, a heat-generating-component-power-consumption detecting sensor, a cooling-component-temperature detecting sensor, and a processor that calculates a heat resistance value of the contact section between the heat generating component and the cooling component and determines the presence or absence of an abnormality in the contact section.

Abstract: A control system for a multi-stage compressor. The control system includes an AC line voltage source, a variable-voltage variable-frequency drive, and a processor. The AC line voltage source is configured to operate the multi-stage compressor. The variable-voltage variable-frequency drive is coupled to the AC line voltage source and is configured to operate the multi-stage compressor at a variable speed. The processor is coupled to the AC line voltage source and the variable-voltage variable-frequency drive, and is configured to alternatively coupled the AC line voltage source and the variable-voltage variable-frequency drive to the multi-stage compressor to operate the multi-stage compressor. The processor is further configured to transmit a capacity control signal to the multi-stage compressor. The capacity control signal is instructive to operate the multi-stage compressor in one of a high-capacity setting and a low-capacity setting.

Abstract: A method for operating a refrigeration system for a mobile unit includes steps of: 1) providing a refrigeration unit having a compressor, an evaporator, and at least one fan operable to move air towards the evaporator, a generator dedicated to the refrigeration unit, and a battery; 2) determining at least one environmental parameter in one or both of the mobile unit and the refrigeration unit; and 3) selectively operating the refrigeration unit in one of a plurality of modes based on the environmental parameter. The plurality of modes includes a first mode wherein at least the fan is powered by the battery, and a second mode wherein the compressor and the fan are powered by the generator.

Abstract: A method of controlling an air conditioner includes a step of sensing the capacitance of condensed water through a plurality of electrode pads to sense the level of condensed water stored in a condensed water storage part during cooling, a step of sensing an increase in the level of condensed water and calculating an amount of condensed water that is generated per unit time based on the sensed increase in the level of condensed water, a step of comparing the sensed level of the condensed water with a drainage level stored in a memory, and a step of operating a drainage pump based on the sensed level of condensed water or the calculated amount of condensed water that is generated per unit time.

Abstract: A device to store energy includes a phase change material (PCM), with a phase change temperature Tc, contained in a sealed container and constituting a storage core. A source to exchange heat with the PCM, at a temperature TA, to cause a phase change of the PCM. A recuperator to exchange heat with the PCM, at a temperature TB, to cause a phase change of the PCM in the opposite direction to the phase change produced by the source. A controller to control the heat flows between the PCM, the source and the recuperator. An apertured support in contact with the PCM in the sealed container and in thermal contact with the source and the recuperator.

Abstract: The invention relates to a refrigeration device, in particular a domestic refrigeration device, comprising a refrigerant circuit. The refrigerant circuit has a compressor, an evaporator, and a shut-off valve between an outlet of the compressor and an inlet of the evaporator. The refrigeration device also comprises a heater for defrosting the evaporator and a control unit that is designed to prepare for defrosting of the evaporator by operating the compressor with the shut-off valve closed.

Abstract: An outdoor unit control unit has a defrosting operation condition table that defines an activation rotational speed based on the total sum of the rated capacity of indoor units and a refrigerant pipe length that is the length of a liquid pipe or of a gas pipe. The outdoor unit control unit uses the total sum of the rated capacity of the indoor units and refers to the defrosting operation condition table, so as to determine the activation rotational speed, and then the outdoor unit control unit activates a compressor at the determined activation rotational speed when starting a defrosting operation, maintains this activation rotational speed for a predetermined time (one minute) from the start of the defrosting operation, and drives the compressor.

Abstract: A heating, ventilation, and air conditioning (HVAC) system includes a fan with a variable fan capacity; a coil with a variable discharge air temperature; and a controller configured to control the variable fan capacity of the fan and the variable discharge air temperature of the coil. The controller is configured to vary the variable capacity of the fan to maintain a space temperature at a space temperature setpoint while maintaining the variable discharge air temperature of the coil at a low discharge air temperature limit. The controller is configured to vary the variable discharge air temperature between a high discharge air temperature limit and the low discharge air temperature limit to maintain the space temperature at the space temperature setpoint while maintaining the variable capacity of the fan at a low fan capacity setting.

Abstract: A condenser includes: a vessel (11) configured to receive a steam flow (S) in a first horizontal direction (X); and cooling tube groups (21, 22, 23, 24) elongated in the first horizontal direction (X) inside the vessel. Each of the cooling tubes groups has a plurality of cooling tubes (31) that are disposed in parallel and extend in a second horizontal direction (Y), which intersects with the first horizontal direction. A hollow portion (32) is formed in the first horizontal direction (X) inside each of the cooling tube groups. A non-condensed gas discharge unit (33) is arranged in the second horizontal direction (Y) at a downstream side of each of the cooling tube groups and includes an opening portion (34) on the hollow portion side. Each of the cooling tube groups includes a partition member (35) extending from the non-condensed gas discharge unit and open at the hollow portion.

Abstract: A method and a heat transfer system for limiting a supply flow (qS) in a heat transfer system which includes a supply conduit (10) with a supply flow (qS) and with a supply entry temperature (TS), and at least one load circuit (2) with a load pump (20) which provides a load flow (qL) with a load entry temperature (TL) and a load exit temperature (TR). The load entry temperature (TL) is set by way of changing the supply flow (qS), wherein the supply flow (qS) is limited to a maximal flow (qS, max), taking into account at least one temperature detected in the load circuit (2).

Abstract: An air terminal for a heating or air conditioning system including a housing, a fresh air inlet in the housing to supply a fresh airflow to the air terminal, an outlet diffuser at the housing to allow airflow from the air terminal into a conditioned space, an inlet diffuser located at the housing to allow return airflow from the conditioned space into the air terminal, a coil located in the housing to condition the fresh airflow and/or the return airflow prior to the fresh airflow and/or the return airflow flowing into the conditioned space. A fan is located in the housing to urge return airflow through the inlet diffuser and across the coil. The fan and the inlet diffuser are located at a first side of the coil and the outlet diffuser and the fresh air inlet are located at a second side of the coil opposite the first side.