Abstract: Systems, methods, and computer-readable media are described for compact radar systems. In some examples, a compact radar system can include a first set of transmit antennas, a second set of receive antennas, one or more processors, and at least one computer-readable storage medium storing computer-executable instructions which, when executed by the one or more processors, cause the radar system to coordinate digital beam steering of the first set of transmit antennas and the second set of receive antennas, and coordinate digital beam forming with one or more of the second set of receive antennas to detect one or more objects within a distance of the radar system.

Abstract: A dual reclaim coil with a smart control application is provided that allows the refrigerant inlet to the HVAC unit switch between the two sides of the condenser is aimed to use the high temperature and pressure of the condenser/gas cooler outlet while a CO2 refrigerant system is operating above critical point. This occurs in hot ambient conditions, when the need for heating in the space is not as great as in the wintertime and the available heat at the condenser/gas cooler's outlet is sufficient to satisfy the heating load. This also mitigates space overcooling, while increasing the CO2 transcritical system's efficiency by subcooling the refrigerant for applications involving dehumidification HVAC systems which often results in a phenomenon called “overcooling” during the dehumidification season.

Abstract: A device for detecting spatial differences in fluid level changes in a tissue of a patient may include a support structure for securing the device to a body part of the patient, a processing element operably connected to the support structure, a wireless networking interface operably connected to the support structure and in communication with the processing element and an external computing device via a network, a first transmission module operably connected to the support structure and in communication with the processing element, a second transmission module and a third transmission module operably connected to the support structure and in communication with the processing element. When activated, the first transmission module transmits a first time varying magnetic field through the tissue of the patient. The second and third transmission modules, which are spatially separated from one another, receive first and second versions, respectively, of the first time varying magnetic field.

Abstract: A dual reclaim coil with a smart control application is provided that allows the refrigerant inlet to the HVAC unit switch between the two sides of the condenser for heat reclaim for refrigerants such as CO2 which have a relatively low critical temperature compared to hydrofluorocarbon refrigerants. Heat reclaim after the exit of gas from the condenser utilizes the high temperature and pressure of the condenser/gas cooler outlet while a CO2 refrigerant system is operating above critical point. This occurs in hot ambient conditions, when the need for heating in the space is not as great as in the wintertime and the available heat at the condenser/gas cooler's outlet is sufficient to satisfy the heating load. When the CO2 refrigerant system is operating below the critical point, heat reclaim is carried out at the compressor discharge.

Abstract: A dual reclaim coil with a smart control application is provided that allows the refrigerant inlet to the HVAC unit switch between the two sides of the condenser is aimed to use the high temperature and pressure of the condenser/gas cooler outlet while a CO2 refrigerant system is operating above critical point. This occurs in hot ambient conditions, when the need for heating in the space is not as great as in the wintertime and the available heat at the condenser/gas cooler's outlet is sufficient to satisfy the heating load. This also mitigates space overcooling, while increasing the CO2 transcritical system's efficiency by subcooling the refrigerant for applications involving dehumidification HVAC systems which often results in a phenomenon called “overcooling” during the dehumidification season.

Abstract: A method of self-balancing a plurality of mechanical components within a temperature control unit of an HVAC system. Each mechanical component is adjustable by the controller to vary airflow within the temperature control unit. For each mechanical components, a property is measured. An estimated condition of the mechanical component is calculated based on the measured property and known qualities of the temperature control unit. A desired condition for the mechanical component is determined based on a desired air condition within the HVAC system or building envelope. The estimated condition of the mechanical component is compared to the desired condition of the component. The condition of the mechanical component is changed using a controller to more closely align the estimated condition to the desired condition to achieve the desired indoor air condition. Steps are repeated until the difference between the estimated condition and desired condition is within a threshold value.

Abstract: A lubricant composition is disclosed. The lubricant composition provides lubrication between metal parts, is able to clean metal parts and prevent build-up of contaminants within the lubricant composition. The lubricant composition includes a plurality of heptane aliphatic hydrocarbons, a non-heptane aliphatic hydrocarbon, a naphthenic petroleum base oil, an octadecenoic acid, and an ethoxylated alcohol. The plurality of heptane aliphatic hydrocarbons may include one-third branched heptanes, one-third cyclic heptanes, and one-third linear n-heptane. The non-heptane aliphatic hydrocarbon may be any aliphatic hydrocarbon with fewer than six carbon atoms that are not linked in a ring formation. The octadecenoic acid in the lubricant composition is generally 9-octadecenoic acid.

Abstract: A method of self-balancing a plurality of mechanical components within a temperature control unit of an HVAC system. Each mechanical component is adjustable by the controller to vary airflow within the temperature control unit. For each mechanical components, a property is measured. An estimated condition of the mechanical component is calculated based on the measured property and known qualities of the temperature control unit. A desired condition for the mechanical component is determined based on a desired air condition within the HVAC system or building envelope. The estimated condition of the mechanical component is compared to the desired condition of the component. The condition of the mechanical component is changed using a controller to more closely align the estimated condition to the desired condition to achieve the desired indoor air condition. Steps are repeated until the difference between the estimated condition and desired condition is within a threshold value.

Abstract: An air conditioning system comprises a housing defining a first airflow path therein between an outside air inlet over a cooling coil and an outlet for delivering outside air from said outside air inlet over said coil to the outlet, a second airflow path between a return air inlet over the cooling coil and to the outlet for delivering return air over the cooling coil, and a third airflow path between the return air inlet and the outlet for delivering return air through the housing without passing over the cooling coil. The system includes outside, return, and bypass air dampers that are sequentially moveable between open and closed positions for directing air through or preventing air from entering the first, second, and third airflow paths, respectively. A controller independently controls the opening and closing of each damper in response to data received from the sensor.

Abstract: A dual path single coil dehumidification system is provided. The system includes a housing that is mounted onto the top of a building that is to be dehumidified. The system draws in outside air which is circulated along its own dedicated path. A cooling coil is disposed in the dedicated outside air path. The outside air therefore passes over the cooling coil and is dehumidified prior to being mixed with any other air. The system also draws in return air from the interior of the building. The system is arranged so that the return air is drawn over refrigeration units that are located in the building to cool the return air. The cooled return air is then drawn into the housing where it is mixed with the outside air only after the outside air passes over the cooling coil. The mixed dehumidified outside air and the cooled return air form a supply air stream that is delivered to the interior of the building.