A cooling system includes a cooling device having a first cooling coil and a second cooling coil, a first heat transfer fluid in fluid communication with the first cooling coil, a second heat transfer fluid in fluid communication with the second cooling coil, a first heat exchanger in fluid communication with the first heat transfer fluid and the second heat transfer fluid, a second heat exchanger in fluid communication with the second heat transfer fluid and a source of external air, a system of fluid control devices in fluid communication with the second heat transfer fluid and configured to minimize a change in a total pressure drop of the second heat transfer fluid when the cooling system switches between operating modes, and a controller configured to selectively control the cooling device and the system of fluid control devices to operate the cooling system in each of the operating modes.

Disclosed are systems and methods of flexibly cooling thermal loads by providing a complex compound system for burst mode cooling, a vapor compression system for ancillary cooling, and a thermal storage system for helping efficiently maintain and cool a thermal load such as a directed energy weapon system.

A cooling system drains oil from low side heat exchangers to vessels and then uses compressed refrigerant to push the oil in the vessels back towards a compressor. Generally, the cooling system operates any number and combination of three different modes of operation: a normal mode, an oil drain mode, and an oil return mode. During the normal mode, a primary refrigerant is cycled to cool one or more secondary refrigerants. As the primary refrigerant is cycled, oil from a compressor may mix with the primary refrigerant and become stuck in a low side heat exchanger. During the oil drain mode, the oil in the low side heat exchanger is allowed to drain into a vessel. During the oil return mode, compressed refrigerant is directed to the vessel to push the oil in the vessel back towards a compressor.

A heat transfer system that includes one or more heat exchangers and one or more variable control pumps that control flow through the one or more heat exchangers. At least one variable control pump is on the source side of the heat exchanger for controlling flow of a first circulation medium and at least one flow controlling mechanical device is on the load side of the heat exchanger for controlling flow of a second circulation medium. Sensors are used for detecting variables of the first circulation medium and the second circulation medium. At least one controller is configured to control at least one parameter of the first circulation medium or the second circulation medium by controlling at least one of the variable control pump or the flow controlling mechanical device using a feed forward control loop calculated from the detected variables to achieve control of the at least one parameter.

A method for cooling a mixed beverage formed with one or more beverage components includes circulating a refrigerant through a heat exchanger having a phase change material to cool a beverage component and sensing a temperature of the refrigerant. The method further includes detecting a first instance when the sensed temperature of the refrigerant equals a threshold refrigerant temperature, detecting a second instance when the sensed temperature of the refrigerant equals the threshold refrigerant temperature, and stopping circulation of the refrigerant when the second instance is detected.

A cryogenic cooler includes a cold region, a heat-transfer fluid circuit, the cold region being positioned in the circuit, and an application heat exchanger configured to exchange calories with a device to be cooled. The cooler includes at least one passive non-return valve fluidly connected to the cold region, the heat exchanger having at least one first fluid inlet positioned downstream of the non-return valve in the flow direction of the heat-transfer fluid, the heat-transfer fluid circulating from the end of the cold region.

A reheating process for operating a cooling system having a heat pump function for a motor vehicle. The reheating process includes steps of determining a heat differential value by comparing a heat emission actual value at the heating register to a heat emission target value, and adjusting at least one operating setting of the cooling system, so that the power consumption in the cooling system is increased if the heat differential value is greater than 0 and less than a heat differential threshold value.

An air conditioner comprises a first refrigeration cycle and a second refrigeration cycle. The first refrigeration cycle comprises an evaporator, a condenser, a compressor and a throttle valve; the evaporator, the condenser, the compressor and the throttle valve are connected to form a first loop; the first refrigeration cycle further comprises a refrigerant which circulates in the first loop; the second refrigeration cycle comprises an antifreeze fluid tank, a pump and a heat exchanger; the antifreeze fluid tank, the pump and the heat exchanger are connected into a second loop; the second refrigeration cycle further comprises an antifreeze fluid which circulates in the second loop; the evaporator is installed in the antifreeze fluid tank and immersed in the antifreeze fluid in the antifreeze fluid tank. The air conditioner is novel in design and high in practicability.

A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first condenser, a vapor generator having a first region and a second region, a first expansion valve, a second expansion valve, and a first evaporator. A branching point is positioned between the first condenser and the vapor generator. The branching point diverts a portion of a first heat exchange fluid circulating through the refrigerant loop to the vapor generator. The first expansion valve is positioned between the branching point and the vapor generator. An outlet vapor generator is coupled to a mid-pressure inlet port of the compressor.

A chilled water distribution system includes a chilled water loop in fluid communication with a plurality of buildings and also in fluid communication with a plurality of chiller stations. A monitoring and control system communicates with one of the chiller stations, hereinafter referred to as a “controlled” chiller station because it is configured with one or more variable frequency drives that are controlled by the monitoring and control system to modulate the speed of at least one chiller station component such as, but not limited to, a pump or a fan. By way of this modulation process, a differential pressure of the chilled water loop may be maintained in a “sweet spot” so as to optimize chiller station output while minimizing chiller station energy consumption.