Abstract:
A modular server rack cooling structure for cooling at least one server in at least one server rack of a data center assembly includes at least a first supporting member and at least a first heat exchanger. The first heat exchanger is coupled to the first supporting member, which is configured to position the first heat exchanger in heat transfer relationship with the at least one server. The first heat exchanger is not attached to the at least one server rack. The modular server rack cooling structure is also applied to a system that includes at least a first rack and at least a second rack disposed opposite from one another to form a hot aisle or a cold aisle. A method is disclosed for installing additional heat exchangers on the support structure of a modular server rack cooling structure to meet increased cooling capacity requirements without requiring additional space.
Abstract:
Modular dual power sources and corresponding systems include a common hybrid energy storage system, a high frequency DC-DC converter coupled between the common hybrid energy storage system, and an ultra-capacitor module for starting up a generator, and a two-level inverter coupled to the common hybrid energy storage system to provide power in case of an interruption in power supplied by a utility supply. The hybrid energy storage system includes an ultra-capacitor module and a battery module. A fast charger is coupled to the hybrid energy storage system to quickly charge the ultra-capacitor module and the battery module, which, in turn, charge the ultra-capacitor module for starting up a generator via a high frequency DC-DC converter. High frequency transformers are used to magnetically isolate electrical noise of the generator and UPS functions and operate independently. The modular dual power sources can be connected in parallel to provide large MW output power.
Abstract:
Systems and methods for supplying power (both active and reactive) at a medium voltage from a DCSTATCOM to an IT load without using a transformer are disclosed. The DCSTATCOM includes an energy storage device, a two-stage DC-DC converter, and a multi-level inverter, each of which are electrically coupled to a common negative bus. The DC-DC converter may include two stages in a bidirectional configuration. One stage of the DC-DC converter uses a flying capacitor topology. The voltages across the capacitors of the flying capacitor topology are balanced and switching losses are minimized by fixed duty cycle operation. The DC-DC converter generates a high DC voltage from a low or high voltage energy storage device such as batteries and/or ultra-capacitors. The multi-level, neutral point, diode-clamped inverter converts the high DC voltage into a medium AC voltage using a space vector pulse width modulation (SVPWM) technique.
Abstract:
An evaporative heat rejection cycle for cooling a heat load is presented, including an environmental pre-cooling primary evaporator, an environmental pre-cooling secondary evaporator, a pre-cooled evaporative heat rejection cycle section in thermal communication with a heat load, and a primary pre-cooling evaporative heat exchanger in thermal communication with air that is drawn into thermal communication with a primary evaporator cycle, to enable heat transfer and moisture elimination from the air to a first fluid, where a portion of the first fluid evaporates and absorbs heat and condenses moisture from the air.