Systems and methods may utilize a two-axis stand configured with a locator moveable along two orthogonally oriented axes. The locator may scan a tube opening. A controller may position the locator and the two-axis stand to a) scan across a plurality of tube openings, b) locate the plurality of tube openings based on the scan, and c) activate a cleaning tool to clean tube interiors associated with respective tube openings. Control may be automated and/or based on user interaction with a user interface.

Systems and methods may utilize a two-axis stand configured with a locator moveable along two orthogonally oriented axes. The locator may scan a tube opening. A controller may position the locator and the two-axis stand to a) scan across a plurality of tube openings, b) locate the plurality of tube openings based on the scan, and c) activate a cleaning tool to clean tube interiors associated with respective tube openings. Control may be automated and/or based on user interaction with a user interface.

A heat storage system is provided that is capable of being manufactured at lower cost and has higher heat transmission efficiency. A heat storage system includes a heat storage material having a higher specific gravity in a solid phase than in a liquid phase, a heat storage tank for containing the heat storage material, a cooling side heat exchanger arranged at an upper section inside the heat storage tank and for cooling the heat storage material, a heating side heat exchanger arranged at a lower section inside the heat storage tank and for heating the heat storage material, and a wall surface heater for heating a side wall of the heat storage tank.

A heat storage system is provided that is capable of being manufactured at lower cost and has higher heat transmission efficiency. A heat storage system includes a heat storage material having a higher specific gravity in a solid phase than in a liquid phase, a heat storage tank for containing the heat storage material, a cooling side heat exchanger arranged at an upper section inside the heat storage tank and for cooling the heat storage material, a heating side heat exchanger arranged at a lower section inside the heat storage tank and for heating the heat storage material, and a wall surface heater for heating a side wall of the heat storage tank.

A system is provided for performing crystallisation by cooling, comprising two crystallisation units, each of the two crystallisation units comprising a cooling body with a crystallisation surface for forming crystals on, and a scraper unit, comprising a scraping member arranged to be moved over the crystallisation surface for scraping crystals from the crystallisation surface and a scraper actuator for moving the scraping member over the crystallisation surface, wherein the scraper actuator of a first of the two crystallisation units can be actuated independently from a scraper actuator of a second of the two crystallisation units.

A firetube scraper device comprising: at least one carriage assembly mounted on the firetube; a drive line and drive means for displacing the carriage assembly longitudinally along the firetube; wherein said carriage assembly surrounding the entire circumference of the firetube and comprising at least one row of scraper fins, each of said scraper fins having an inner surface adapted to frictionally engage an outer firetube surface defined by at least an upper portion of the surface of the firetube exposed to contaminants deposited onto a firetube surface.

A firetube scraper device comprising: at least one carriage assembly mounted on the firetube; a drive line and drive means for displacing the carriage assembly longitudinally along the firetube; wherein said carriage assembly surrounding the entire circumference of the firetube and comprising at least one row of scraper fins, each of said scraper fins having an inner surface adapted to frictionally engage an outer firetube surface defined by at least an upper portion of the surface of the firetube exposed to contaminants deposited onto a firetube surface.

The efficiency of projectile tube cleaning in multitube heat exchangers is greatly enhanced by the use of two or more nozzles for pressurized water or other liquid held by a bracket in parallel orientation a distance apart that equals the distance apart of the tubes. A pneumatic control system enables the simultaneous activation of two or more pressurized water valves so that two or more tubes can be scraped clean at once. Large heat exchangers and condensers having ordered arrays of thousands of parallel tubes can be cleaned by selecting a number of tubes for deposition of cleaning projectiles, repeatedly projecting two or more of the projectiles simultaneously, and immediately moving on to another set of tubes; then repeating the process with another selected number of tubes.

The efficiency of projectile tube cleaning in multitube heat exchangers is greatly enhanced by the use of two or more nozzles for pressurized water or other liquid held by a bracket in parallel orientation a distance apart that equals the distance apart of the tubes. A pneumatic control system enables the simultaneous activation of two or more pressurized water valves so that two or more tubes can be scraped clean at once. Large heat exchangers and condensers having ordered arrays of thousands of parallel tubes can be cleaned by selecting a number of tubes for deposition of cleaning projectiles, repeatedly projecting two or more of the projectiles simultaneously, and immediately moving on to another set of tubes; then repeating the process with another selected number of tubes.

A heat exchanger is disclosed having a first cylindrical tube and a lead screw which extends coaxially inside the first cylindrical tube; the inner surface of the first cylindrical tube has guiding grooves, and a cleaning element is secured to the lead screw in such a way that a rotating movement of the lead screw moves the cleaning element in the axial direction along the guiding grooves.