A device for closing at least one inner tube in a tubular heat exchanger. The device comprises a main body provided with inner tube through holes and at least one plug configured to be inserted into the at least one inner tube.

A thermal simulation system adapted to establish a test environment for a thermal test is provided. The thermal simulation system includes a communication element, a controllable loading element, a plurality of connectors, and a controller. The communication element is configured to receive at least one of a heating control signal, a fan control signal, and a loading control signal from an external electronic device. The controllable loading element is configured to provide a loading. The connectors are configured to connect a heating element and a fan. The controller is configured to control a heat energy generated by the heating element according to the heating control signal, control a fan speed of the fan according to the fan control signal, and control a loading value of the loading provided by the controllable loading element according to the loading control signal.

A heat exchanger control and diagnostic apparatus includes a heat exchanger having a primary inlet of a primary heat-transport liquid mounted with a first temperature sensor and a primary outlet of the primary heat-transport liquid mounted with a second temperature sensor, wherein the primary outlet is piped to a pump, the pump comprising a pump impeller connected to a motor, the primary heat-transport liquid being piped by plumbing from the pump impeller to a heat source and from the heat source back to the primary inlet, and a control unit connected to the beat exchanger and the pump and comprising a motor control unit bi-directionally connected to the motor. The heat exchanger has a secondary inlet for a secondary heat-transport liquid and a secondary outlet ducted to a temperature zone and back to the secondary inlet, the control unit being augmented by a temperature module, the temperature module having a first input connected by a communication channel to an output of the temperature sensor, and a second input connected by a communication channel to an output of the second temperature sensor, the temperature module having an output for outputting a primary inlet temperature connected to one input of a power calculation module, and an output for outputting a primary outlet temperature connected to another input of the power calculation module, the power calculation module having a third input connected to a flow estimation module, one input of the flow estimation module being connected to an output of a memory unit, and another input being connected by a bus to an output of the motor control unit, an output of the power calculation module for outputting a heat flow estimate being connected to one input of a heat flow controller, and another input of the heat flow controller for inputting a heat flow demand being connected to an output of an operator unit, and an output of the operator unit being connected to an input of the motor control unit.

A method predicts an amount of wear that is expected to occur on the tubes of a steam generator as a result of vibration against another structure within the steam generator. The method includes determining a volumetric amount of material that has been worn from a location on a tube over a duration of time and employing that volume as a function of time to determine the volume of material of the tube wall that is predicted to be worn from the tube or another tube at a future time. The volumetric-based analysis enables more accurately prediction of the wear depth at a future time. This enables the plugging of only those tubes that are determined from a volumetric analysis to be in risk of breach at the future time, thus slowing the rate at which tubes of a steam generator will be plugged.

A lifetime diagnosis component for anticorrosive coating includes a plate-shaped base member having an aluminum layer on a surface thereof; and a sacrificial anode layer portion formed of zinc on the base member. The surface of the base member has a base-member exposing portion where the aluminum layer is exposed.

The present disclosure relates to a heat exchanger coil prototyping system. The heat exchanger coil prototyping system includes a heat exchanger coil with a first conduit and a second conduit that carry a refrigerant. The first conduit includes a first open end and a second open end. The second conduit includes a third open end and a fourth open end. A fin couples to the first conduit and the second conduit. A quick release connector system also couples to the first and second conduits. The quick release connector system includes a first quick release connector assembly that couples to the first open end of the first conduit and to the third open end of the second conduit to route the refrigerant between the first and second conduits. A second quick release connector assembly couples to the second conduit.

A heat exchanger system comprises a heat exchanger; and one or more sensor(s) for measuring characteristics of a fluid flow field across a cross-section of a flow path in the heat exchanger. Each of the one or more sensor(s) comprises multiple conductivity sensing elements distributed across multiple locations in an array extending over the cross-section of the flow path for obtaining measurements of the fluid flow field at the multiple locations.

Disclosed herein are evaporator assemblies for heat pump systems. The evaporator units can comprise a housing defining an interior chamber, an air inlet and an air outlet. The air inlet and the air outlet can form an air flow path through the interior chamber, and an evaporator unit can be positioned within the interior chamber such that the air flow path contacts the evaporator unit. The air inlet having a semi-circular cross section through which air flows into the interior chamber, the semi-circular cross section having a straight edge and a curved edge. A velocity magnitude of the air flowing from the air inlet into contact with the evaporator unit can deviate less than 0.1 m/s from the average air velocity across the surface area of the evaporator.

Methods of placing sensors in structures may involve placing first particles including a first material of the structure on or above a support surface. Second particles including a second, different material may be dispersed among the first particles at least within a transition region of the structure proximate to a location where a sensor is to be supported by the structure. A sensor may be placed in the location. The first particles of the first material may be fused to one another and to the second particles of the second material to form the structure with the sensor supported by the structure.

A tube transition fitting is formed having a first end, a second end, a head, a body, a weld area, and a first wall thickness and second wall thickness. A tube seat is formed on a surface connected to the body, the surface being adjacent a transition from the first wall thickness to the second wall thickness. A tube transition assembly includes a header portion, the tube transition fitting, and a heat exchange tube, each being connected using one or more simplified and/or heat-optimized connections.