Abstract: An air conditioner terminal device (100) and a data center comprising the air conditioner terminal device, wherein the air conditioner terminal device (100) comprises a heat exchanger (12), a variable-speed fan (22), an air passage (101) communicating from an air suction port (11) to an air discharge port (21), and refrigerant flowing through the heat exchanger. The heat exchanger (12) and fan (22) are installed in the air passage (101), and the fan (22) forces air within the air passage (101) to flow towards the air discharge port (21) from the air suction port (11). The refrigerant comes into heat contact with air within the air passage (101) via the heat exchanger (12). The heat exchanger has an input joint (121) and an output joint (122), the refrigerant flows in via the input joint (121) and flows out the output joint (122). The refrigerant inside the input joint (121) is liquid-phase fluid, whereas the refrigerant inside the output joint (122) is gas-liquid two-phase fluid or gas-phase fluid.

Abstract: The invention discloses an air conditioner terminal device (100), an air conditioning apparatus and a data center (1000), wherein the air conditioner terminal device (100) comprises an air passage (101) communicating from an air suction port (11) to an air discharge port (21), a heat exchanger (12) and a variable-speed fan (22) which forces air in the air passage (101) to flow towards the air discharge port (21) from the air suction port (11) are installed in the air passage (101), and both the air suction port (11) and the air discharge port (21) are open downwardly. Therefore, air circulation can be improved and refrigerating capacity of the air conditioner terminal device can be increased.

Abstract: An air conditioning system includes a condenser and an evaporator configured to remove thermal energy from a water flow through the evaporator via a refrigerant flow through the evaporator. A refrigerant conduit is configured to convey a refrigerant flow through the evaporator and the condenser. An ice storage tank is fluidly connected to the refrigerant conduit such that the refrigerant flow is flowable through the ice storage tank to transfer thermal energy between the refrigerant flow and a volume of frozen water disposed in the ice storage tank.

Abstract: An air conditioning system includes an inlet duct, supply duct, return duct and exhaust duct: a heat exchanger for providing heat transfer between air from the inlet duct and air from the return duct: a cooling coil position in the supply duct: a pan for collecting condensate from the cooling coil; a pump to pump condensate from the pan: and a sprayer coupled to the pump, the sprayer spraying condensate into an air path to increase efficiency of the air conditioning system.

Abstract: A condenser/accumulator (60) has a shell (62). A coolant flowpath extends from a coolant (144) inlet to a coolant outlet (146). An upper tube bundle (68) is within the shell, a first branch of the coolant flowpath passing through tubes of the upper tube bundle. A lower tube bundle (70) is within the shell, a second branch of the coolant flowpath passing through tubes of the lower tube bundle. A refrigerant flowpath extends from a refrigerant inlet (64) to a refrigerant outlet (66) and is in heat transfer relation with the coolant flowpath. There is a vertical gap (76) between the upper tube bundle and the lower tube bundle and comprising at least 50% of a free volume of a refrigerant space within the shell.

Abstract: A system and method for conditioning air within an air handling system of a building is provided. The building has a hot water source and a cold water source. The conditioning system includes at least one heating-cooling unit connected to the air handling system, a primary water storage device, at least one heat pump, and a controller. The heating-cooling unit, which includes at least one chilled beam, is operable to transfer heat into or out of air passing within the air handling system of the building. The primary water storage device is operable to store a volume of water within a predetermined temperature range. The primary water storage device is in communication with the hot water source and the cold water source. The heat pump is connected to the primary water storage device and the chilled beam. The controller is adapted to selectively drive the heat pump to transfer heat between the primary water storage device and the chilled beam.

Abstract: A blocking plug fitting that does not require brazing is described that fits in matching correspondence with an existing fitting arrangement used to couple refrigerant tubing to a heat exchanger. The blocking plug fitting allows a refrigerant system to be returned to service quickly if a heat exchanger is removed for repair.

Abstract: A spiral flat tube heat exchanger comprising a first flat tube and a second flat tube thermally coupled to the first flat tube, the first flat tube and the second flat tube forming substantially concentric spirals. A first fluid flows through the first flat tube in a first flow direction, and second fluid flows through the second flat tube in a second flow direction. The flat tubes preferably contain microchannels to increase heat transfer efficiency.

Abstract: A heat exchange device and a method of compensating for increases in pressure in tubes within the heat exchange device is provided. The heat exchange devices includes a plurality of the tubes for carrying a first medium and a compressible feature insertable into at least one of the tubes. Expansion of the medium causes said compressible feature to compress. The compressible feature can be inert resilient material.

Abstract: A method and apparatus for determining whether a fluid, such as a refrigerant, is a liquid or a gas. To determine whether the fluid at a predetermined level (14) of a storage container (20) is a liquid or a gas, fluid is withdrawn from the container at the predetermined level, depressurized under conditions that would cause it to become a gas if it is a liquid before such depressurization, then the temperature of the fluid after depressurization is measured and compared to a reference temperature that is or is related to the temperature of the fluid in the container. If the temperature of the fluid after depressurization and the reference temperature are approximately equal, one can conclude that the fluid withdrawn from the predetermined level is a gas. If the temperature of the fluid after depressurization is considerably lower than the reference temperature, one can conclude that the fluid withdrawn from the predetermined level is a liquid.