Abstract: A pump device includes a piezoelectric pump, a piezoelectric pump, and a driving circuit. The piezoelectric pump is driven at a first frequency when singly driven. The piezoelectric pump is driven at a second frequency when singly driven. The driving circuit drives the piezoelectric pump and the piezoelectric pump at the same driving frequency.

Abstract: A liquid cooling static synchronous series compensator (SSSC) system has inverter valve modules, inverter valve units and liquid cooling blocks. Liquid cooling blocks may be configured to provide a jetted flow, a parallel flow or an individualized flow, within an enclosed fluid chamber, for cooling inverter valve units. Liquid cooling blocks may have voltage isolation.

Abstract: An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system utilizing an existing sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the existing sensor detecting the abnormal condition. Further included is an audio sensor, a wireless transmitter, a wireless receiver, programmable control circuitry, a switching transistor, a relay, and a power supply for all the previous elements, wherein these components utilize the first event marker signal and through a series of subsequent signals to result in the relay being operative to be in an activated operational state upon being energized by the switching transistor to operationally effectuate the selected response from the HVAC building system.

Abstract: An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system optionally including a sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the sensor detecting the abnormal condition. Further included is control circuitry in a first communication with the sensor, wherein the control circuitry is in a ready state that is operative to monitor for the first event marker signal, wherein the control circuitry outputs a second event marker signal corresponding to the first event marker signal, a relay in a second communication with the control circuitry, the relay is operative to be in an activated operational state upon receiving the second event marker signal to operationally effectuate the selected response from the HVAC building system.

Abstract: A cooling system comprises an information technology (IT) container including a plurality of IT chambers, a fluid supply channel disposed at a bottom of the IT container to receive the fluid from a cooling unit and to supply the fluid to the IT chambers, a fluid return channel disposed on a top of the IT chambers to return the fluid received from the IT chambers to the cooling unit, a fluid acceleration channel disposed separately from the fluid return channel to return at least some of the fluid to the cooling unit in an accelerated manner, and one or more pumps disposed between at least some of the IT chambers immerged in the fluid environment and the fluid acceleration channel to increase a flowrate of the fluid from the corresponding IT chambers to the cooling unit via the fluid acceleration channel. For example, each IT chamber to store fluid and to populate IT equipment submerged in the fluid for immersion cooling. In an embodiment, the IT chamber includes acceleration sections.

Abstract: A two-phase immersion cooling apparatus may include an immersion tank with a primary condenser in thermal communication with an interior volume of the immersion tank and a vapor management system fluidically connected to the immersion tank. The vapor management system may enable the apparatus to effectively manage periods of high vapor production by removing vapor and other gases from a headspace of the immersion tank, condensing the vapor to liquid, and returning the liquid to the immersion tank.

Abstract: The method for controlling an apparatus for dispensing food products envisages associating a tank (2) for containing the product to be dispensed with measuring means (10) for measuring the weight of the tank (2) itself and measuring the variations in said weight of the tank (2) with respect to a predetermined reference value. The weight variations in the product contained in the tank (2) are calculated according to said variations in the weight of the tank (2).

Abstract: An energy recovery ventilator includes first and second blowers, a pressure transducer and a controller. The first blower is configured to direct a first air stream into a first zone of an enclosure. A second blower configured to direct a second air stream into a second zone of the enclosure. A pressure transducer is configured to determine internal air pressure within the enclosure. A controller is configured to control the first blower and/or the second blower in response to the internal air pressure.

Abstract: A fluid heating system for a work vehicle including a pressurized fluid circuit, a pump, and a fan for cooling fluid of the fluid circuit. Pressurized fluid of the fluid circuit provided to the fan results in fan operation. A speed of the fan corresponds to a flow rate of pressurized fluid of the fluid circuit provided to the fan. A control device is in fluid communication with the fluid circuit, the control device operable between a first position and a second position. The first position of the control device results in substantially all of the fluid of the fluid circuit being provided to the fan. The second position of the control device results in at least a portion of the fluid of the fluid circuit bypassing the fan, thereby reducing the speed of the fan while increasing a pressure magnitude and increasing a temperature of the fluid system.

Abstract: A safety heat exchanger for combining a heat pump with a device of a drinking water supply facility for obtaining heat from drinking water. The heat exchanger includes a primary circulation loop (4) with drinking water, a secondary circulation loop (6) with antifreeze as a material that does not pose a health risk, and a tertiary circulation loop (7) with a coolant. The primary circulation loop (4) includes an inlet (3) connected to a drinking water supply facility and an outlet (5) with electrically controllable magnetic valves (16).

Abstract: Provided is a water-cooled air compressor which is capable of restraining lowering of the performance of a plate type compressor for heat-exchanging compressed air from a compressor body, with cooling water due to clogging of gaps between plates in the heat-exchanger by dust or the like, incorporating a first solenoid valve and a second solenoid valve connected respectively in a cooling water supply pipe line and a cooling water discharge pipe line of the heat-exchanger, an air feed pipe line connecting between a compressed air supply pipe line on the outlet side of the heat-exchanger and the cooling water discharge pipe line, a third solenoid valve and a check valve connected in the air feed pipe line, a discharge pipe line connected in a discharge pipe line 18 so as to branch therefrom, a fourth solenoid valve connected in the discharge pipe line, and a control device for controlling opening and closing of the first to fourth solenoid valves.

Abstract: A cooling method of an electronic device, the cooling method naturally circulating a cooling medium between an evaporator, which gasifies the cooling medium and cools heat-discharging air from the electronic device by heat exchange with the heat-discharging air, and a cooling tower or a condenser, which is disposed at a higher position than the evaporator and liquefies the gasified cooling medium, and subjecting a flow rate of the cooling-medium liquid supplied to the evaporator to valve control so that a temperature of the air obtained after the heat exchange and the cooling by the evaporator becomes a temperature suitable for an operating environment of the electronic device, wherein the improvement comprises that a condensation temperature or a condensation pressure of the cooling-medium gas in the cooling tower or the condenser is configured to be not varied even when the flow rate of the cooling-medium liquid supplied to the evaporator is subjected to the valve control.

Abstract: A closed loop control system for controlling generator cooling pressure, purity and dew point at power plants with hydrogen cooled generators to achieve optimum efficiency. The present invention uses feedback from plant status monitoring software to dynamically control parameters such as hydrogen pressure, purity and dew point to achieve optimum efficiency and provide necessary reserve capacity. The hydrogen pressure setpoint can be manipulated based on plant conditions such as output voltage, MVAR reserve capacity, likelihood of increased demand and other parameters. In general, an attempt is made to lower the pressure setpoint to achieve efficiency. Margin is built in to account for time lag in raising hydrogen pressure in the case of increased demand.

Abstract: An air handling system for an indoor space comprising a first forced indoor air treatment component, an input indoor air duct element and an output treated air duct element respectively coupling said first forced indoor air treatment component to said indoor space, a second forced air treatment component a stale air duct element coupled to said second forced air treatment component and to said input indoor air duct, a return air duct element coupling said second forced air treatment component to said output treated air duct element characterized in that said system comprises a secondary air path means for coupling said return air duct element to said input indoor air duct element.

Abstract: A method for cooling an inverter of a vehicle system includes the steps of providing a flow of cooling fluid to the inverter, determining a value of a variable that is influenced at least in part by the flow of cooling fluid to the inverter, and regulating the flow of cooling fluid to the inverter based at least in part on the value of the variable.

Abstract: An exhaust gas heat exchanger system of a combustion engine has a bypass duct and a heat exchanger duct with a heat exchanger. A valve is controlled by determining when heat is to be transferred from exhaust gas flowing through the exhaust system to the heat exchanger. When heat is to be transferred, the valve is switched into a first position in which all of the exhaust gas flows through the heat exchanger duct. A pressure drop across the heat exchanger system is monitored either directly or indirectly. If the pressure drop reaches a predefined limit, the valve is switched into an intermediate position, resulting in a smaller portion of the exhaust gas flowing through the heat exchanger duct than when the valve is in the first position and a remaining portion flowing through the bypass duct, thereby reducing the pressure drop across the heat exchanger system.

Abstract: A heat transfer apparatus includes one heat exchanging system having a compressor coupled between a condenser and a heat exchanger. A further heat exchanging system includes a water pump, an ion exchange filter coupled between the water pump and the heat exchanger, to filter negative ions, positive ions, mineral materials, and/or impurities from the water. A temperature detecting member may actuate a heater to maintain the water temperature. A water cycling system includes a water reservoir to maintain the water pressure in the further heat exchanging system. An air relief valve may relieve air bubbles to reduce shocks and vibrations in the heat exchanging system.

Abstract: To provide an outflow prevention device which is capable of preventing refrigerant from flowing out into a vehicle compartment even when an evaporator has ruptured. The outflow prevention device comprises a shut valve arranged in a passage via which refrigerant introduced into a shut valve inlet from an expansion device is allowed to flow to the evaporator, and a check valve arranged in a passage via which refrigerant returned from the evaporator is allowed to flow to an accumulator. A chamber behind a piston fixed to a plug holding a valve sheet and a chamber on a downstream side of the check valve are communicated with each other via a bypass passage, so that differential pressure generated across the check valve by flow of refrigerant through the same can be applied to the shut valve to open and close the same.

Abstract: A system and method for cooling by orchestrated movement of pistons to displace gases or fluids. The present invention uses a plurality of pistons which move in arranged patterns that force air through a channel in a single direction. The movement of air displaces heat, and the apparatus can be placed so as to provide cooling to devices in, for example, a computer system, by quietly moving air away from a heat source. The pistons are preferably moved at subsonic rates so they do not substantially contribute audible noise.

Abstract: An engine cooling module 10 which includes a shroud 12, a heat exchanger 18, a fan 14, a motor 13 for driving fan 14, and a plurality of air dams 1. Shroud 12, circumscribing the fan, has a main opening to allow air to pass through the fan to or from a heat exchanger 18. Fan 14 is associated with the shroud 12 to be adjacent to the fan opening to permit air moved by the fan to pass through the heat exchanger. Air dams 1 allow air to flow more easily in one direction than the opposite direction. In the fan flow direction, air dams 1 provide relatively little resistance to the flow. In the direction opposite to fan flow direction, air dams 1 provide more resistance than as compared to the resistance when air flows in the fan flow direction. Under ram air conditions (e.g., when the vehicle is moving), the use of air dams can reduce the load on the fan's motor by cooling properties of ram air, while reducing recirculation, thereby increasing efficiency.

Abstract: An AC drive which can be applied to any power using device and in particular is a medium voltage AC drive. In a preferred embodiment, a multilevel AC drive topology is implemented, with the drive including a plurality of inverters and converter electrically coupled through electrical buses and physically coupled through their respective modular bases, and sharing a common cooling system connected to the respective heat exchangers of each component. The AC drive generally is made up of a plurality of inverter modules, which are connected to a converter module, and with each of the above components packaged in a relatively small unit having a cooling apparatus.

Abstract: The present invention comprises a method and device for deterring the freezing within a condenser by preventing critical pressure differentials from building up between the exhaust steam header and the air ejector systemy. The means for regulating pressure in the air ejector system prevents the pressure difference between the turbine exhaust and the air ejector system from being great enough to carry condensate through a condensing tube into an air ejector system.

Abstract: An engine cooling module 10 which includes a shroud 12, a heat exchanger 18, a fan 14, a motor 13 for driving fan 14, and a plurality of air dams 1. Shroud 12, circumscribing the fan, has a main opening to allow air to pass through the fan to or from a heat exchanger 18. Fan 14 is associated with the shroud 12 to be adjacent to the fan opening to permit air moved by the fan to pass through the heat exchanger. Air dams 1 allow air to flow more easily in one direction than the opposite direction. In the fan flow direction, air dams 1 provide relatively little resistance to the flow. In the direction opposite to fan flow direction, air dams 1 provide more resistance than as compared to the resistance when air flows in the fan flow direction. Under ram air conditions (e.g., when the vehicle is moving), the use of air dams can reduce the load on the fan's motor by cooling properties of ram air, while reducing recirculation, thereby increasing efficiency.

Abstract: A convective cooling apparatus cools an electronic device including at least one heat-generating component and enclosed in a case having cooling medium such as air or fluid therein. The convective cooling apparatus neither attempts to increase the velocity of flow in the cooling medium nor replaces the cooling medium with other material as prior art cooling apparatus did. Instead, it utilizes the instability which is inherent in the flow of the cooling medium. In the convective cooling apparatus, by using a driver for generating a signal tuned to the characteristic frequency of the flow, a an acoustic vibrator is driven to provide acoustic waves. The acoustic waves induce resonance of flow, which renders the cooling medium vigorously mixed, which, in turn, enhances the heat dissipation from the device.

Abstract: The present invention relates to a control system for establishing and maintaining a desired uniform temperature in a room heated by a heating device. The control system includes a valve assembly for controlling the pressure of the fluid supplied to the heating device, the valve assembly including a valve actuator, a pressure sensor sensing the pressure of the fluid supplied to the heater, and a temperature control device to sense the ambient temperature of the room.

Abstract: A refrigerant distributor of a refrigerating cycle for a heat pump of the present invention comprising a compressor for compressing a refrigerant and discharging the refrigerant variably, a distributor for distributing the refrigerant passed through an expansion device expanding the refrigerant to a plurality of branching pipes and making the refrigerant flow to a evaporator including a plurality of blocks, a refrigerant flow controller installed on a certain branching pipe of the distributor for opening/closing the flow of the refrigerant to the branching pipes, and a by-pass pipe for making a certain amount of the refrigerant discharged variably from the compressor flow to the refrigerant flow controller by connecting the discharge side of the compressor and refrigerant flow controller so as to open/close the certain branching pipe of the distributor by the operation of the refrigerant flow controller in accordance with the discharge compressor of the refrigerant discharged variably from the compressor is c

Abstract: A heat exchanger which is symmetrical with respect to rotation, especially a thermal roller which is driveable for rotation and is heated by a fluid or gas, preferably a heat transfer oil, water or steam, and is preferably used in the paper industry includes at least one shut-off device for cutting off the forward flow and/or return flow of the thermal roller as soon as the forward flow pressure and/or the return flow pressure of the heat transfer medium drops off significantly or drops to zero.

Abstract: A conveyor/cooler of hot loose materials produced by fluid bed boilers and various industrial processes includes one or more feeding channels, which are substantially vertical or at any inclination. Because of gravity, the material leaves the combustion chamber of the boiler. A metallic container is connected to the downstream end of the discharging channels. A metallic conveyor belt driven by a motor is placed within the container, and the material from the downstream end of the channels is laid on the conveyor belt, thus forming a travelling continuous bed. The belt therefore constitutes a regenerative heat exchanger which absorbs heat from the material during the forward run and gives it back to the air during the backward run.

Abstract: An electronic cabinet assembly is disclosed which is positioned in an exterior environment, such as a railway tunnel. The cabinet assembly includes an electronic cabinet having a box portion and at least one door together defining an interior space. The door has an open position for providing access to the interior space and a closed position where the door is in sealed relation to the box portion. The electronic cabinet includes one or more vents. A fan is in communication with the exterior of the cabinet, and with the interior space. A pressure sensing device is electrically connected to the fan and is in communication with the exterior of the cabinet and with the interior space for actuating the fan in response to sensing a predetermined pressure differential between the exterior of the cabinet and the interior space.

Abstract: A flow control panel includes a pair of upper and lower sheets arranged one above the other. The upper sheet has a plurality of integral ridges and a plurality of recesses between adjacent ridges. Likewise, the lower sheet has a plurality of integral ridges and a plurality of recesses between adjacent ridges. The upper and lower sheets are superimposed so that each of the upper ridges is positioned in respective one of the lower recesses between adjacent lower ridges to form a plurality of passages through which a flowing fluid medium flows. When a pressure increase occurs within the passages, the upper and lower sheets are relatively moved away from one another to increase the cross sectional area of the passages to accommodate such a pressure increase within the passages.

Abstract: In a plant equipment comprising apparatus of a plurality of systems and control means for switching the systems and changing capacities of the apparatus, an apparatus of each system bas a rated capacity which is 1/N of a capacity of the whole equipment, and the plant equipment is constituted of (N+1) systems. In conditions of normal operation, all the (N+1) systems are operated at capacities less than the rated capacity through the control means. During normal operation, when one system is inspected, or when an abnormality occurs in one system, this system is stopped by the control means. Capacities of apparatus in N of the systems which are operated are increased to the rated 1/N capacity through the control means, and operation is continued with a structure of 1/N capacity.times.N systems. When the maintenance of apparatus in the stopped system is finished, the stopped system is restarted, so as to operate all of the (N+1) systems at capacities less than the rated capacity again.

Abstract: A convective cooling apparatus cools an electronic device including at least one heat-generating component and enclosed in a case having cooling medium such as air or fluid therein. The convective cooling apparatus neither attempts to increase the velocity of flow in the cooling medium nor replaces the cooling medium with other material as prior art cooling apparatus did. Instead, it utilizes the instability which is inherent in the flow of the cooling medium. In the convective cooling apparatus, by using a driver for generating a signal tuned to the characteristic frequency of the flow, a an acoustic vibrator is driven to provide acoustic waves. The acoustic waves induce resonance of flow, which renders the cooling medium vigorously mixed, which, in turn, enhances the heat dissipation from the device.