Abstract: Methods for anomaly detection in additive manufacture using meltpool monitoring are disclosed. A method includes obtaining a process model representative of an object to be generated through additive manufacture. The method also includes generating, based on the process model and using a hybrid machine-learning model, an instruction for generating the object through additive manufacture. Another method includes generating a layer of an object, and taking a reading relative to the generation of the layer. The other method also includes updating, based on the reading and using a hybrid machine-learning model, a process model, the process model representative of the object. The other method also includes generating, based on the updated process model and using the hybrid machine-learning model, an instruction for generating a subsequent layer of the object through additive manufacture. Related systems and devices are also disclosed.

Abstract: A method of calibrating a laser of an additive manufacturing system involves processing a test pattern with the laser while varying one or more of laser power and/or scan speed. Thermal energy emitted from the resulting meltpool is measured while processing the test pattern. The power of the laser is calculated using a relationship between volumetric energy density and the thermal emissions, and the laser power is adjusted based on the calculated laser power. An additive manufacturing system for performing such a method may include a laser, a thermal sensor configured to measure meltpool thermal emissions, a processor configured to calculate a laser power based on the measured meltpool thermal emissions of the test pattern, and a controller configured to adjust the laser power based on the calculated laser power.

Abstract: A ventilator system is presented. The ventilator system includes a controller configured to generate a first control signal for a first time-period and a second control signal for a second time-period during an inspiration time. Also, the ventilator system includes a rotary pump configured to change one of a pressure and a flow rate of the drive gas to a first value if the first control signal is received and change the one of the pressure and the flow rate of the drive gas to a second value if the second control signal is received. Further, the rotary pump is configured to deliver the drive gas to cause supply of a medical gas during the inspiration time, wherein the medical gas is supplied based on the one of the pressure and the flow rate of the drive gas delivered from the rotary pump.

Abstract: Embodiments of the disclosure relate to systems and methods to evaluate performance of a fluid transport system. Towards this end, a performance report of the fluid transport system can be generated by estimating various performance parameters at an outlet of a heat exchanger in lieu of using sensor data obtained directly from the outlet of the heat exchanger. Specifically, in one exemplary implementation, sensor data is obtained from an inlet of the heat exchanger and an outlet of a downstream element that is coupled to the heat exchanger, for estimating the various performance parameters at the outlet of the heat exchanger. The estimated performance parameters can then be combined with empirical data and predictive data for generating the performance report of the fluid transport system.

Abstract: An ejector for a sealed system includes a motive liquid passage with a converging section, a throat and a diverging section. The throat of the motive liquid passage is disposed between the converging section of the motive liquid passage and the diverging section of the motive liquid passage. The ejector also includes a plurality of nucleation sites at the converging section of the motive liquid passage.

Abstract: A packaged terminal air conditioner unit is provided. The packaged terminal air conditioner unit includes a casing. A compressor, an interior coil, an exterior coil and a reversing valve are positioned within the casing. The reversing valve is configured for selectively reversing a flow direction of compressed refrigerant from the compressor. The packaged terminal air conditioner also includes at least one ejector for combining a stream of refrigerant from a primary loop with a stream of refrigerant from an auxiliary cooling loop, thereby improving system efficiency.

Abstract: A packaged terminal air conditioner unit is provided. The packaged terminal air conditioner unit includes a casing. A compressor, an interior coil, an exterior coil and a reversing valve are positioned within the casing. The reversing valve is configured for selectively reversing a flow direction of compressed refrigerant from the compressor. The packaged terminal air conditioner also includes at least one phase separator and at least one ejector.

Abstract: A packaged terminal air conditioner unit is provided. The packaged terminal air conditioner unit includes a casing. A compressor, an interior coil, an exterior coil and a reversing valve are positioned within the casing. The reversing valve is configured for selectively reversing a flow direction of compressed refrigerant from the compressor. The packaged terminal air conditioner also includes at least one ejector for combining a stream of refrigerant from a primary loop with a stream of refrigerant from an auxiliary cooling loop, thereby improving system efficiency.

Abstract: The air conditioner unit includes an outdoor heat exchanger disposed in an outdoor portion and an indoor heat exchanger disposed in an indoor portion, the indoor heat exchanger including a first coil assembly and a second coil assembly, each of the first and second coil assemblies including one or more coils through which refrigerant is flowable. The air conditioner unit further includes an ejector disposed in the indoor portion, the ejector comprising a motive port, a suction port and a discharge port. The air conditioner unit further includes a phase separator disposed in the indoor portion, the phase separator comprising an inlet, a gas outlet and a liquid outlet. The air conditioner unit further includes a compressor in fluid communication with the outdoor heat exchanger and the indoor heat exchanger.

Abstract: Embodiments of the disclosure relate to systems and methods to evaluate performance of a fluid transport system. Towards this end, a performance report of the fluid transport system can be generated by estimating various performance parameters at an outlet of a heat exchanger in lieu of using sensor data obtained directly from the outlet of the heat exchanger. Specifically, in one exemplary implementation, sensor data is obtained from an inlet of the heat exchanger and an outlet of a downstream element that is coupled to the heat exchanger, for estimating the various performance parameters at the outlet of the heat exchanger. The estimated performance parameters can then be combined with empirical data and predictive data for generating the performance report of the fluid transport system.

Abstract: An ejector for a sealed system includes a motive liquid passage with a converging section, a throat and a diverging section. The throat of the motive liquid passage is disposed between the converging section of the motive liquid passage and the diverging section of the motive liquid passage. The ejector also includes a plurality of nucleation sites at the converging section of the motive liquid passage.

Abstract: A packaged terminal air conditioner unit includes a casing. A compressor, a reversing valve and an ejector of the packaged terminal air conditioner unit are positioned within the casing. The ejector is configured for drawing vapor refrigerant into a flow of liquid refrigerant. An exterior heat exchanger and an interior heat exchanger are also positioned within the casing. The interior heat exchanger has a first stage and a second stage.

Abstract: A packaged terminal air conditioner unit is provided. The packaged terminal air conditioner unit includes a casing. A compressor, an interior coil, an exterior coil and a reversing valve are positioned within the casing. The reversing valve is configured for selectively reversing a flow direction of compressed refrigerant from the compressor. The packaged terminal air conditioner also includes at least one phase separator and at least one ejector.

Abstract: Water heater appliances and methods for operating water heater appliances are provided. A water heater appliance includes a tank defining an interior volume, and a sealed system for heating water within the interior volume. The sealed system includes a compressor operable to compress refrigerant, and a first condenser downstream of and in fluid communication with the compressor. The first condenser is operable to heat water within the interior volume using energy from the refrigerant. The sealed system further includes a second condenser downstream of and in fluid communication with the first condenser. The second condenser is operable to heat water within the interior volume using energy from the refrigerant. The sealed system further includes an evaporator between and in fluid communication with the second condenser and the compressor.

Abstract: Water heater appliances and methods for operating water heater appliances are provided. A water heater appliance includes a tank defining an interior volume, and a sealed system for heating water within the interior volume. The sealed system includes a compressor operable to compress refrigerant, and a first condenser downstream of and in fluid communication with the compressor. The first condenser is operable to heat water within the interior volume using energy from the refrigerant. The sealed system further includes a second condenser downstream of and in fluid communication with the first condenser. The second condenser is operable to heat water within the interior volume using energy from the refrigerant. The sealed system further includes an evaporator between and in fluid communication with the second condenser and the compressor.