Apparatus and system for self-cleaning a heat transfer coil of an HVAC system includes a foam or spray generator, one or more manifolds, one or more couplers, and a controller. The foam or spray generator is configured to generate foam or spray. Each manifold includes one or more emitters. The couplers are configured to couple the manifolds onto the heat transfer coil of the HVAC system, such that the emitters are configured to emit the foam or spray onto a side of the heat transfer coil. The controller is configured to cause the foam or spray generator to generate the foam or spray and cause the emitters to emit the foam or spray when a fan is running, such that the foam or spray is caused to flow through the heat transfer coil to clean debris off or apply a treatment to the heat transfer coil.

The present invention relates to systems and methods for cleaning of devices, such as heat exchangers. According to the invention, controlled cavitation is created at predetermined positions within a device. The cavitation is done by mechanical waves, such as ultrasound waves, generated by transducers, wherein the waves are based on output of time-reversal wave form analysis of the device structures.

A system and method of controlling corrosion of a heat exchanger, having a hot gas inlet and outlet and a cold side inlet and outlet. The method includes determining a temperature of the heat exchanger at a first selected location, controlling a temperature of a corrosion sensing device to a first selected temperature based on the temperature of the surface of the heat exchanger and determining a corrosion rate associated with the heat exchanger surface at the first selected location for the first selected temperature. The method also includes comparing the corrosion rate to an expected corrosion rate, determining a cold side fluid inlet temperature target for the heat exchanger based at least in part on the comparing, the determined corrosion; and controlling a cold side fluid inlet temperature based at least in part on the determined inlet temperature target, determined corrosion rate, and expected corrosion rate.

A cleaning method of a heat sterilization system includes: a step of causing a fluid formed of a cleaning liquid or a rinse liquid to flow through the heat sterilization system; a step of supplying hot water to a second-stage heating unit to heat the second-stage heating unit; and a step of measuring fluid temperatures of the fluid at the fluid inlet and the fluid outlet of the second-stage heating unit, and medium temperatures of the hot water at a medium inlet of the second-stage heating unit and a medium outlet of the second-stage heating unit. An overall heat transfer coefficient (U value) of a heating pipe of the second-stage heating unit is calculated based on the fluid temperatures at the fluid inlet and the fluid outlet of the second-stage heating unit and the medium temperatures at the medium inlet and the medium outlet of the second-stage heating unit.

A method of cleaning an HVAC coil unit located above a drain basin. One step of the method involves providing a supply and collection assembly having a reservoir containing liquid cleaning solution, a pump operative to output the liquid cleaning solution through a supply outlet, and a vacuum source operative to draw in used liquid cleaning solution through a collection inlet. According to another step, a nozzle device in fluid communication with the supply outlet is also provided, the nozzle device having a delivery face. A further step involves providing a fluid return tool in fluid communication with the collection inlet, and positioning the fluid return tool in the drain basin. According to a further step, the delivery face of the nozzle device is moved across a surface of the HVAC coil unit to deliver the cleaning solution into areas between fins thereof.

The invention relates to cleaning of tube bundle of NPP steam generator. The device for cleaning heat exchange tubes of NPP steam generator comprising a manipulator, which is installed to be moved and fixed in a vertical corridor between bundles of heat exchange tubes; a nozzle that is installed on the manipulator ad is in the form of a head of injectors connected to a pipeline for supplying high-pressure water jets; and means for remote control and video monitoring, wherein the manipulator is equipped with a body, which is installed on a guiding mounting frame and is connected to a base; a drive for main rotational movement located on the body; a post which is connected to the body and is in the form of a hollow column; a drive for auxiliary movement which is fixed on the post, an elbow which is connected to the post and is in the form of a tube having a gear rack, and an elbow of actuating units and a coordinate head. The technical result is a shorter cleaning time and more reliable removal of deposits.

A system, apparatus and method of cleaning tubes of a heat exchanger or a tube bundle that includes disengaging the heat exchanger or bundle from a use-position in a process or a plant; moving the heat exchanger or bundle to a cleaning station remote from the use-position; positioning the heat exchanger or tube bundle in front of a cleaning apparatus; providing water jet cleaning equipment on the cleaning apparatus; responding to programming in a computing device and controlling the water jet cleaning equipment and a cleaning operation; providing a pattern of tube openings defined in an end plate of the heat exchanger or bundle to the computing device; actuating the water jet cleaning equipment with the computing device; and manually or automatically performing a cleaning operation with the water jet cleaning equipment under control of the programming of the computing device and by following the provided pattern of tube openings.

A method of controlling cooling water treatment may involve measuring operating data of one or more downstream heat exchangers that receive cooling water from the cooling tower. For example, the inlet and outlet temperatures of both the hot and cold streams of a downstream heat exchanger may be measured. Data from the streams passing through the heat exchanger may be used to determine a heat transfer efficiency for the heat exchanger. The heat transfer efficiency can be trended over a period of time and changes in the trend detected to identify cooling water fouling issues. Multiple potential causes of the perceived fouling issues can be evaluated to determine a predicted cause. A chemical additive selected to reduce, eliminate, or otherwise control the cooling water fouling can be controlled based on the predicted cause of the fouling.

A heat exchange system having desired anti-scaling performance and an anti-scaling method thereof are disclosed. The heat exchange system at least comprises a load control unit, a temperature and pressure detection unit and an anti-scaling treatment unit. The heat exchange system conditions bonding ways of water quality in a HVAC chiller unit, an air compressor, a heat exchanger, a cooling unit, or a boiler under a variety of scaling conditions in both field operation and water quality, by integrating the interaction of those units together with the anti-scaling method for simulating water quality that has a water quality limit same as that in field operation. The heat exchange system further integrates with a testing of anti-scaling performance to make water quality no longer charged and lose the reaction power so as to prevent scaling formation, enhance the anti-scaling performance, and ensure operating efficiency and performance.

Disclosed are devices and systems for self-cleaning deep HVAC coils with built-in self-cleaning mechanisms and enhanced heat transfer, and methods of cleaning thereof. For example, some embodiments of a deep HVAC coil include a series of built-in self-cleaning mechanisms disposed among an array of heat transfer coils. Depending on the size and depth of the deep HVAC coil, the number of self-cleaning mechanisms may vary. The disposition and installation of self-cleaning mechanisms in the deep coil HVAC is configured to provide an even distribution and injection of a desired cleaning solution or foam which sufficiently covers an internal surface area of the deep HVAC coils and sufficiently fills an internal volume of the deep HVAC coils.