Abstract: A chiller system includes a mechanical-cooling circuit configured to circulate a refrigerant through an evaporator of the mechanical-cooling circuit, where the evaporator is configured to cool a conditioning fluid with the refrigerant. The chiller system also includes a free-cooling circuit configured to circulate the refrigerant through a heat exchanger of the free-cooling circuit, where the heat exchanger is configured to cool the conditioning fluid with the refrigerant. The chiller system also includes a distribution header having a first inlet configured to receive the refrigerant from the mechanical-cooling circuit, a second inlet configured to receive the refrigerant from the free-cooling circuit, and an internal volume fluidly coupled to the first inlet and the second inlet. A fan coil unit of the chiller system is configured to receive the refrigerant from the internal volume of the distribution header.

Abstract: A system includes a vapor compression assembly and a free cooling assembly. The free cooling assembly corresponds to a cooling fluid and includes an air cooled heat exchanger, an additional heat exchanger, and a valve. The system also includes a controller configured to receive data indicative of an ambient condition, an operating condition of the system, or both. The controller is also configured to actuate, based on the data, the valve between a first setting in which the cooling fluid is directed to the additional heat exchanger and blocked from a condenser of the vapor compression assembly, a second setting in which the cooling fluid is directed to the condenser and blocked from the additional heat exchanger, and a third setting in which a first portion of the cooling fluid is directed to the additional heat exchanger and a second portion of the cooling fluid is directed to the condenser.

Abstract: A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system (10) includes a vapor compression system (14) having an evaporator (38), a condenser (34), and a compressor (32). The compressor (34) is configured to guide a refrigerant therethrough in a normal operating mode of the vapor compression system (14) and in a free cooling mode of the vapor compression system (14). The HVAC&R system (10) also includes a controller (40) configured to enable supply of power to a motor (50) of the compressor (34) in the normal operating mode and to suspend supply of power to the motor (50) of the compressor (34) in the free cooling mode.

Abstract: A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.

Abstract: A chiller system includes a mechanical-cooling circuit configured to circulate a refrigerant through an evaporator of the mechanical-cooling circuit, where the evaporator is configured to cool a conditioning fluid with the refrigerant. The chiller system also includes a free-cooling circuit configured to circulate the refrigerant through a heat exchanger of the free-cooling circuit, where the heat exchanger is configured to cool the conditioning fluid with the refrigerant. The chiller system also includes a distribution header having a first inlet configured to receive the refrigerant from the mechanical-cooling circuit, a second inlet configured to receive the refrigerant from the free-cooling circuit, and an internal volume fluidly coupled to the first inlet and the second inlet. A fan coil unit of the chiller system is configured to receive the refrigerant from the internal volume of the distribution header.

Abstract: A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.

Abstract: A heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a compressor configured to circulate a refrigerant through a refrigerant loop of the HVAC&R system, a heat recovery heat exchanger configured to receive the refrigerant from the compressor and to place the refrigerant in a heat exchange relationship with a process fluid, and a condenser configured to receive the refrigerant from the heat recovery heat exchanger, the compressor, or both, in which the condenser is configured to cool the refrigerant. The HVAC&R system further includes a fan configured to direct air across the condenser and an evaporator configured to place the refrigerant in a heat exchange relationship with a cooling fluid. A speed of the fan is configured to be adjusted based on an operating parameter of the HVAC&R system.

Abstract: A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.

Abstract: Embodiments of the present disclosure are directed toward systems and method for cooling a refrigerant flow of a refrigerant circuit with a cold cooling fluid flow from a thermal storage unit to generate a warm cooling fluid flow, thermally isolating the cold cooling fluid flow and the warm cooling fluid flow in the thermal storage unit, and cooling the warm cooling fluid flow from the thermal storage unit in a chiller system to at least partially produce the cold cooling fluid flow.

Abstract: A refrigeration system includes a chiller with an integrated free cooling system and refrigeration system. In certain embodiments, the chiller may be a single package unit with all equipment housed within the same support frame. The chiller may generally include three modes of operation: a first mode that employs free cooling, a second mode that employs free cooling and implements a refrigeration cycle, and a third mode that uses the free cooling system provide additional cooling capacity for the refrigeration system. The free cooling system includes an independent loop configured to transfer heat from a cooling fluid circulating within the free cooling system to the ambient air.

Abstract: A refrigeration system includes a chiller with an integrated free cooling system and refrigeration system. In certain embodiments, the chiller may be a single package unit with all equipment housed within the same support frame. The chiller may generally include three modes of operation: a first mode that employs free cooling, a second mode that employs free cooling and implements a refrigeration cycle, and a third mode that uses the free cooling system to remove heat from the refrigeration system. A heat exchanger may be shared between the free cooling system and the refrigeration system to transfer heat from the refrigeration system to the free cooling system.

Abstract: A modular water based heating and cooling system for providing chilled or heated water to terminal devices in a building to heat/cool individual zones in the building. The system includes a flow control device in fluid communication with a riser chilled water supply line, a riser chilled water return line, a riser heated water supply line, and a riser heated water return line. The flow control device includes first control valves and second control valves. Terminal device supply lines extend from the flow control device and are connected to respective first control valves. Terminal device return lines extend from the flow control device and are connected to respective second control valves. The first control valves and the second control valves cooperate to supply required chilled water or heated water through the terminal device supply lines to terminal devices based on the cooling/heating requirements of the terminal devices.

Abstract: The present disclosure relates to a refrigeration system that includes an evaporator disposed along an evaporator line, a compressor system disposed along a compressor line, a condenser disposed along a condenser line and configured to condense the refrigerant compressed by the compressor system to heat a second fluid stream, and an outdoor coil disposed along a coil line and configured to receive the refrigerant from the condenser or from a discharge line, to selectively transfer heat to or from the refrigerant, and to selectively transfer the refrigerant to the evaporator or to a suction line. The refrigeration system includes two valves and three expansion valves disposed along the different refrigerant flow lines, and a controller configured to determine a simultaneous heating/cooling operating mode of the refrigeration system and to control the valves and expansion valves to operate the refrigeration system in the desired mode.

Abstract: Embodiments of the present disclosure relate to a heating, ventilating, air conditioning, and refrigeration (HVAC&R) system that includes a variable speed drive (VSD) configured to supply power to a motor configured to drive a compressor of the HVAC&R system, a rectifier of the VSD configured to receive alternating current (AC) power from an AC power source and convert the AC power to direct current (DC) power, a DC bus of the VSD electrically coupled to the rectifier, an inverter of the VSD electrically coupled to the DC bus, where the inverter is configured to convert the DC power to output AC power, the output AC power has a variable voltage and a variable frequency, and the output AC power is directed to the motor, and a battery electrically coupled to the DC bus, where the battery is configured to provide auxiliary DC power to the VSD.

Abstract: A refrigeration system includes a free cooling system having an air-cooled heat exchanger, where the air-cooled heat exchanger includes a fan configured to move air over coils of the air-cooled heat exchanger to remove heat from a coolant flowing through the air-cooled heat exchanger, and a mechanical cooling system with a refrigerant loop that includes an evaporator, a compressor, and a condenser disposed along the refrigerant loop, where the compressor is configured to circulate a refrigerant through the refrigerant loop, and wherein the evaporator is configured to receive the coolant and transfer heat from the coolant to the refrigerant. The refrigeration system also includes a controller configured to adjust a fan speed of the fan up to a threshold fan speed, to initiate operation of the compressor when the fan speed reaches the threshold fan speed, wherein the fan speed and a compressor speed of the compressor are based at least on an ambient air temperature and a cooling load demand.

Abstract: A heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a compressor configured to circulate a refrigerant through a refrigerant loop of the HVAC&R system, a heat recovery heat exchanger configured to receive the refrigerant from the compressor and to place the refrigerant in a heat exchange relationship with a process fluid, and a condenser configured to receive the refrigerant from the heat recovery heat exchanger, the compressor, or both, in which the condenser is configured to cool the refrigerant. The HVAC&R system further includes a fan configured to direct air across the condenser and an evaporator configured to place the refrigerant in a heat exchange relationship with a cooling fluid. A speed of the fan is configured to be adjusted based on an operating parameter of the HVAC&R system.

Abstract: The present disclosure relates to a refrigeration system that includes an evaporator disposed along an evaporator line, a compressor system disposed along a compressor line, a condenser disposed along a condenser line and configured to condense the refrigerant compressed by the compressor system to heat a second fluid stream, and an outdoor coil disposed along a coil line and configured to receive the refrigerant from the condenser or from a discharge line, to selectively transfer heat to or from the refrigerant, and to selectively transfer the refrigerant to the evaporator or to a suction line. The refrigeration system includes two valves and three expansion valves disposed along the different refrigerant flow lines, and a controller configured to determine a simultaneous heating/cooling operating mode of the refrigeration system and to control the valves and expansion valves to operate the refrigeration system in the desired mode.

Abstract: Air cooled chillers have auxiliary heat recovery systems that include a heat recovery heat exchanger for transferring heat from a compressed refrigerant to a process fluid. According to certain embodiments, the air cooled chillers also includes a compressor, a condenser, an expansion device, and a controller to govern operations of the expansion device, a fan in the condenser, and other components of the chiller system. The controller may receive signals from temperature and pressure sensors located throughout the chiller system in order to determine a heat recovery load of the heat recovery heat exchanger. The controller may govern operations of the condenser fan and the expansion device according to a low heat recovery mode, an intermediate heat recovery mode, or a full heat recovery mode. In full heat recovery mode, the controller operates the expansion device based on subcooling detected in the heat recovery heat exchanger.

Abstract: Embodiments of the present disclosure are directed toward systems and method for cooling a refrigerant flow of a refrigerant circuit with a cool water flow from a cool water storage to generate a warm water flow and to cool the refrigerant flow by a subcooling temperature difference, flowing the warm water flow to the cool water storage, and thermally isolating the warm water flow from the cool water flow in the cool water storage.

Abstract: Embodiments of the present disclosure relate to a heating, ventilating, air conditioning, and refrigeration (HVAC&R) system that includes a variable speed drive (VSD) configured to supply power to a motor configured to drive a compressor of the HVAC&R system, a rectifier of the VSD configured to receive alternating current (AC) power from an AC power source and convert the AC power to direct current (DC) power, a DC bus of the VSD electrically coupled to the rectifier, an inverter of the VSD electrically coupled to the DC bus, where the inverter is configured to convert the DC power to output AC power, the output AC power has a variable voltage and a variable frequency, and the output AC power is directed to the motor, and a battery electrically coupled to the DC bus, where the battery is configured to provide auxiliary DC power to the VSD.