Abstract: A cooling system for an equipment closet in a building has a direct expansion cooling circuit. The cooling system has two basic modes of operation. A first mode where the direct expansion cooling circuit is off and transfer air from an area of the building outside the equipment closet is used to cool the interior of the equipment closet without any cooling provided by the direct expansion cooling circuit and a second mode where the direct expansion cooling circuit is on and provides direct expansion cooling that is used to cool the interior of the equipment closet.

Abstract: A cooling system for an equipment closet in a building has a direct expansion cooling circuit. The cooling system has two basic modes of operation. A first mode where the direct expansion cooling circuit is off and transfer air from an area of the building outside the equipment closet is used to cool the interior of the equipment closet without any cooling provided by the direct expansion cooling circuit and a second mode where the direct expansion cooling circuit is on and provides direct expansion cooling that is used to cool the interior of the equipment closet.

Abstract: An air conditioner system including a condenser fan, an ambient temperature sensor, a refrigerant pressure sensor, and a controller. The ambient temperature sensor is to sense ambient temperature at the system. The refrigerant pressure sensor is to sense pressure of a refrigerant of the system. The target refrigerant pressure module is to identify an optimum pressure of the refrigerant in the system. The controller is to generate an output representing a speed of the condenser fan operable to maintain the pressure of the refrigerant at about the optimum pressure as the ambient temperature of the system changes.

Abstract: An air conditioner system including an indoor unit and an outdoor unit. The outdoor unit includes a condenser, a temperature sensor, a pressure sensor, and a controller. The controller detects a fault with at least one of the temperature sensor or the pressure sensor and adjusts a speed of the condensing fan according to the pressure identified by the pressure sensor when the pressure sensor is operating normally. The controller adjusts the speed of the condensing fan according to the sensed temperature sensor when the pressure experiences a fault and the temperature sensor is operating normally. The controller controls the speed of the condensing fan according to default values when both the pressure sensor and the temperature sensor experience a fault.

Abstract: A universal control panel for controlling operation of a cooling component. The universal control panel may have a variable frequency drive (VFD) that incorporates an input voltage and frequency sensing circuit; and logic, memory and communications circuits. The VFD accepts a plurality of differing input signals, analyzes the input signals and generates an output signal having a desired voltage and frequency to provide real time control over an electrical component operably associated with the cooling component. The VFD controls the cooling component in relation to changes in at least one of sensed pressure and a sensed temperature of a fluid, to dampen response of the electrical component, to thus achieve more efficient use of the cooling component being used to cool the fluid.

Abstract: A universal control panel for controlling operation of a cooling component. The universal control panel may have a variable frequency drive (VFD) that incorporates an input voltage and frequency sensing circuit; and logic, memory and communications circuits. The VFD accepts a plurality of differing input signals, analyzes the input signals and generates an output signal having a desired voltage and frequency to provide real time control over an electrical component operably associated with the cooling component. The VFD controls the cooling component in relation to changes in at least one of sensed pressure and a sensed temperature of a fluid, to dampen response of the electrical component, to thus achieve more efficient use of the cooling component being used to cool the fluid.

Abstract: An integrated quiet and energy efficient modes of operation for an air-cooled condenser according to the present disclosure can allow a user to select operation along a continuum that extends from a relatively more efficient mode of operation to a relatively more quiet mode of operation. The user-selected mode allows a user to select a compromise between efficient operation and quiet operation so that a desired operation of a cooling system having the air-cooled condenser is realized. The speed of a fan which induces an airflow across a condenser can be adjusted based on the user-selected operating mode.

Abstract: The present disclosure provides a method, apparatus, and system for a centralized microchannel cooling system in precision cooling applications, such as mission-critical systems with data centers or cabinets or rooms with medical equipment. The microchannel condenser is designed to provide sufficient cooling for such applications by configuring multiple microchannel slabs together in a fashion that advantageously can increase the overall cooling abilities of multiple slabs not heretofore known. The system can provide a retrofit condenser for some existing precision cooling systems that have limitations on size, while satisfying cooling capacity requirements. The multiple slabs can be cooled by flowing a fluid such as air or a liquid across them. One or more microchannel slabs can be mounted horizontally, vertically, or in an inclined position. Further, the system can allow for multiple passes of refrigerants through the microchannel slabs.

Abstract: A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28,30,32,34,36,38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (?e), and a camber height (?c) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44,46,48,50,52,54,56,58,60)). The cross-sections (44,46,48,50,52,54,56,58,60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2.

Abstract: A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28,30,32,34,36,38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (&bgr;e), and a camber height (&dgr;c) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44,46,48,50,52,54,56,58,60)). The cross-sections (44,46,48,50,52,54,56,58,60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2.

Abstract: A tubeaxial fan (10) broadly including a cylinder (12), a propeller (14) rotatably supported in the cylinder (12), and a drive assembly (16) operable to rotate the propeller (14) is disclosed. The propeller (14) includes blades (28, 30, 32, 34, 36, 38) each having an inventive blade design. The inventive blade design presents a chord length (C), a stagger angle (&bgr;e) and a camber height (&dgr;c) that vary along each of the blades as shown in TABLE 1. The inventive blade design presents an external surface of each of the blades having a shape defined by the relative positioning of a plurality of coordinates contained in at least nine cross-sections (e.g., the blade (28) includes cross-sections (44, 46, 48, 50, 52, 54, 56, 58, 60)). The cross-sections (44, 46, 48, 50, 52, 54, 56, 58, 60) of the illustrated blade (28) have the corresponding plurality of coordinates listed in TABLE 2.

Abstract: A telecommunications equipment enclosure (10) that more effectively dissipates heat from electronic cards without transferring the heat to adjacent cards and without transferring the heat to air within an enclosed chamber surrounding the cards. The enclosure (10) includes a floor (12) and a plurality of card-receiving sleeves (14) attached to the floor (12). Each of the sleeves (14) defines a separate enclosed cell or holder that is configured for receiving and enclosing a single electronic card. The sleeves (14) are spaced apart to define a plurality of open air channels therebetween for convecting heat away from the sleeves (14) and the cards received therein while preventing heat from transferring from sleeve to sleeve.