Abstract: Methods for monitoring scale deposition in a water-containing industrial process are disclosed. In certain embodiments, the water-containing industrial process is an aqueous cooling system. In certain embodiments, the methods incorporate fluorometric monitoring and control techniques along with a piezoelectric microbalance sensor. A particular embodiment of a piezoelectric microbalance sensor is additionally disclosed, along with at least one method for using the particular embodiment that is independent of whether fluorometric monitoring and control techniques are utilized.

Abstract: A self-cleaning, shell and tube type heat exchanger using a solid particle-water supply system. The heat exchanger includes solid particle supplying means for storing and supplying solid particles to be used in cleaning the heat exchanger tubes, and water supply means for fluidizing the solid particles stored in the solid particle supplying means so as to supply the solid particles into a mixed fluid discharging means, or for directly supplying water to the mixed fluid discharging means. The mixed fluid discharging means sucks the supplied solid particles and water, and sprays the supplied solid particles and water as a mixed fluid from above the vertical heat transfer tube arrangement such that inside surface of the heat transfer tubes can be cleaned. Separating means separates the mixed fluid used in cleaning the heat transfer tubes into solid particles and water, using a gravitational separation method.

Abstract: The present invention relates to a condenser tubes cleaning system for alleviating the common disadvantage of the prior arts includes a flow diverter, a first branch pipe, a second branch pipe, a three-way valve, a first one-way valve, a bypass pipe, a ball barrel, a liquid supply pipe, a cleaning ball supply pipe, a cleaning ball return pipe, a liquid return pipe, a second one-way valve, a normally open two-way valve, and a ball trap. Thus, the flow diverter is provided with the three-way valve, and the ball trap is provided with the normally open two-way valve, so that the flow diverter and the ball trap have a bypass function that the prior arts do not have, to maintain the constant flow rate in the main supply pipe and the main return pipe without increasing the electrical power load of the main circulating pump.

Abstract: A device for cleaning contamination in heat exchangers, waste-heat boilers, or combustion chambers is provided. In some embodiments, the device comprises a tube, a blasting body, and a combustible gas mixture within the tube. In some embodiments, the tube is destroyed after blasting. In some embodiments, the device further comprises a second tube comprising a blasting cord that is connected to a fuse, wherein the second tube is coupled to the first tube by a hinge.

Abstract: A dust-cleaning device for a computer and a method using the same that utilizes a computer fan are disclosed. The computer is a laptop computer, a desktop computer, or a server. The method comprises: determining if a temperature of an electronic component is higher than a specific temperature; and if so, then reversing the computer fan for a specific amount of time as indicated by a timer.

Abstract: A heat recovery device is provided for recovering thermal energy from a fluid medium, in particular for use in a waste-water system of a dishwasher. The heat recovery device comprises at least one heat exchanger with at least one heat exchanger surface. The heat recovery device further comprises at least one heating device, which is thermally coupled to the heat exchanger surface, and also at least one controller. The controller is designed to carry out a self-cleaning process for the heat exchanger, with the heat exchanger surface being briefly heated by means of the heating device during the self-cleaning process.

Abstract: A water quality control method for an evaporative cooling water chiller uses a water pump to transport cooling water from a water tank to a water-spraying element via a water pipe. The cooling water is sprayed onto fins and a refrigerant pipe of a first heat exchanger, flows along the fins and is collected in the water tank. Thereby, the cooling water reduces the temperature of the heat exchanger. The water pump is set to operate for a first period and to stop for a second period so that the temperature of the fins and the refrigerant pipe increases. Thereby, the limescales attached to the heat exchanger are detached and drop into the water tank. Subsequently the water pump is turned on again. The cooling water in the water tank flushes out the accumulated particles on the bottom of the water tank, and clean cooling water is added.

Abstract: The present invention relates to a method and apparatus for the prevention of fouling of process streams by the application of electric charge on process components. The electric charge may be attractive or repulsive to the foulants, they may be constant or variable and may be applied to any section of the process stream where convenient and wherein their preventive effects are optimized.

Abstract: A cooling water circulation apparatus capable of limiting attachment of microorganisms and scale in an environmentally friendly manner and a method of removing scale in the cooling water circulation apparatus. An electrolytic device 10 is provided on a cooling water circulation route R1. In the arrangement, mineral contents such as calcium ions and magnesium ions contained in cooling water W are deposited as scale S on an electrode 12A or 12B in an electrolytic step, thereby enabling the mineral contents to be removed from the cooling water W. Even if the hardness of the cooling water W is increased by evaporation of the water with elapse of time, the hardness can be reduced by the electrolytic processing. Thus, the deposition of the scale S in the circulation route R1 can be reduced. Further, the scale S deposited on the electrode 12A or 12B can be easily separated by operating while reversing the polarities of the electrodes 12A and 12B at predetermined time intervals.

Abstract: A fan coil controller for a hot and cold water system of a building that turns off the fan while the hot water and cold water coils are flushed. A fan coil control circuit is configured to periodically and temporarily operate a hot water flow control circuit and a cold water flow control circuit to cause a flushing of the hot and cold water system and simultaneously provide a signal to a fan control circuit to prevent the thermostat enabling the fan during flushing of the hot and cold water system.

Abstract: A cleaning system for cleaning tubing using cleaning balls (20) circulated with the fluid through tubing (8). The system includes a separator (12) having a perforated funnel, which permits the fluid, but not the cleaning balls (20), to pass through. A housing (21) having an apertured partition (28) is used to divide the housing (21) into an first compartment (19) and a second compartment (27). An entrance (2) of a fluid supply pipe (23) and an exit (3) of a ball supply pipe (24) are formed for creating a difference in pressure to create a suction force to recirculate the cleaning balls (20) from the housing (21) via the ball supply pipe (24), back to the tubing (8) for cleaning the walls of the tubing (8). An entrance (13) of a ball return pipe (17) and an exit (14) of a fluid return pipe (16) are formed for creating a difference in pressure to create a suction force to recirculate the cleaning balls (20) from the separator (12) via the ball return pipe (17), into the housing (21).

Abstract: This cleaning system includes a compressor driven by a motor, a condenser; a cooling fan for directing an air stream at the condenser during normal operation, a motor drive system for driving the fan, and a timing device for reversing the rotational direction of the fan motor to direct the stream of cooling air away from the condenser to remove debris collected on the condenser and clean the condenser during a cleaning cycle. The fan is driven by drive system having a solid state commutated motor or a drive system having a reversible permanent split capacitor motor. The timing device includes a timer for controlling the time periods during the normal operation (cooling) cycle and during the cleaning cycle.

Abstract: A method and apparatus for supplying cooling air to electronic equipment from ones of at least two sources. A detector detects whether the quality, such as the temperature of the cooling air from a source, is satisfactory and if not shuts the damper to that source and opens the damper to another source. A main controller provides additional control signals for controlling the dampers to protect the electronic equipment, or for shutting down the electronic equipment.

Abstract: An apparatus for removing deposits from a heat transfer wall of a heat exchanger. The apparatus includes a cleaning cycle control system that operates through the control system of the heat pump and eliminates the need for periodic acid cleaning of heat exchanger. The cleaning cycle control system engages a heating cycle of the heat pump to at least partially freeze the fluid adjacent to the heat transfer wall and then engages the cooling cycle of the heat pump to thaw the fluid adjacent to the heat transfer wall. The thermal expansion and contraction of the deposits on the heat transfer wall and the flow of fluids through the heat exchanger flush deposits from the heat transfer wall of the heat exchanger.

Abstract: Whenever a dishwasher is operated a given number of times or whenever a given number of days transpire, an apparatus performs a process that removes minerals deposits that have built-up inside the dishwasher. The process commences by rinsing the dishwasher interior with water and draining the rinse water. A mixture of water and a chemical that dissolves the minerals is introduced into the dishwasher and a pump circulates the mixture inside the dishwasher for a period of time. Next the mixture is drained out and the dishwasher interior is rinsed again with fresh water.

Abstract: A control installation for solid cleaning members circulating in a heat exchanger includes interception arrangements interposed on the heat exchanger outlet pipe, a return pipe which recycles toward the inlet pipe a return flow containing the solid cleaning members, and a control device for the solid cleaning members. Between the interception arrangements and the control device there is a concentration device dividing the return flow into two parts. The return pipe is part of circulation arrangements which generate a counter-current flow through the interception arrangements and which include suction arrangements in line with the interception device to take up the solid cleaning members retained thereby.

Abstract: An apparatus for removing deposits from a heat transfer wall of a heat exchanger. The apparatus includes a cleaning cycle control system that operates through the control system of the heat pump and eliminates the need for periodic acid cleaning of heat exchanger. The cleaning cycle control system engages a heating cycle of the heat pump to at least partially freeze the fluid adjacent to the heat transfer wall and then engages the cooling cycle of the heat pump to thaw the fluid adjacent to the heat transfer wall. The thermal expansion and contraction of the deposits on the heat transfer wall and the flow of fluids through the heat exchanger flush deposits from the heat transfer wall of the heat exchanger.

Abstract: A system for calculating the degree of fouling in a heat exchanger having at least one longitudinal tube inside of a shell, the shell having a first heat exchange medium flowing inside the tube and a second heat exchange medium flowing across the outside surface of the tube. The apparatus includes a first temperature sensor, a device for determining the temperature of the tube at a first axial position of the tube, and a fouling detector. The first temperature sensor senses the temperature of the tube at a first axial position of the tube. The fouling detector calculates the degree of fouling in the tube based on the initial temperature difference between the temperature of the tube and the temperature of the first heat exchange medium in the tube at the first axial position, and a later temperature difference between the temperature of a surface of the tube and the temperature of the first heat exchange medium in the tube at the first axial position.