Abstract: A heat exchange device is disclosed in the form of a condenser for vapors containing non-condensible gases. Mechanical shutter members in the form of air foils are pivotally mounted in the exhaust stacks of the condenser for selectively blocking the exhaust stack to prevent back draft through the condenser when the respective air circulation fan thereof is inoperative. In one form of the invention, the condenser includes air recirculation ducts which also can be selectively closed by dampers to prevent back draft through the return ducts when the respective air recirculation fan is inoperative.

Abstract: An air cooled vacuum producing condenser is disclosed for condensing vapors containing non-condensible gases, i.e. air. The condenser includes a condenser chamber with a bundle of condenser tubes across the chamber. Inlet and outlet headers are disposed at opposite ends of the chamber. Water is directed downwardly onto the bundle of condenser tubes, and air is discharged from the interior of the chamber to create a downward flow of air through the chamber across the bundle of condenser tubes.

Abstract: An air cooled vacuum producing condenser is disclosed for condensing vapors containing non-condensible gases, i.e. air. The condenser includes a condenser chamber with a bundle of condenser tubes across the chamber. Inlet and outlet headers are disposed at opposite ends of the chamber. Water is directed downwardly onto the bundle of condenser tubes, and air is discharged from the interior of the chamber to create a downward flow of air through the chamber across the bundle of condenser tubes.

Abstract: An air cooled vacuum producing condenser is disclosed for condensing vapors containing non-condensible gases, i.e. air. The condenser includes a condenser chamber with a bundle of condenser tubes across the chamber. Inlet and outlet headers are disposed at opposite ends of the chamber. Water is directed downwardly onto the bundle of condenser tubes, and air is discharged from the interior of the chamber to create a downward flow of air through the chamber across the bundle of condenser tubes.

Abstract: An air cooled vacuum producing condenser is disclosed for condensing vapors containing non-condensible gases, i.e. air. The condenser includes a condenser chamber with a bundle of condenser tubes across the chamber. Inlet and outlet headers are disposed at opposite ends of the chamber. Water is directed downwardly onto the bundle of condenser tubes, and air is discharged from the interior of the chamber to create a downward flow of air through the chamber across the bundle of condenser tubes.

Abstract: This invention relates to an apparatus for maintaining the desired temperature of a fluid, or more specifically, to reducing the temperature of the fluid to a desired level. The apparatus generally relates to one including a heat exchange coil through which the fluid to be cooled passes and over which an air stream is moved to absorb heat from the coil. In such an arrangement, it is common to increase the heat transfer efficiency of the coil by maintaining the same in a wet condition by means of a water spray or cascade, for example. In this manner, evaporation of the water causes an accelerated transfer of heat from the fluid in the coil for a given amount of air flow thereover than would be the case if the coil surface was not drenched. The present invention is directed to the disposition of a propeller air moving means sufficiently downstream of the cooling coil so as to be substantially free of air flow obstructions.

Abstract: A system for recovering and utilizing, to a controlled and variable extent, waste heat from a coolant fluid. The amount of heat recovery varies in proportion to the marginal costs associated therewith. Heat laden coolant passes through an interior heat exchanger where heat may be extracted in varying amounts from the coolant by a thermostatically-controlled air mover, the air mover admitting outside air past the interior heat exchanger. The coolant proceeds to an exterior wet surface heat exchanger where residual heat is concurrently extracted from the coolant by a thermostatically-controlled combination of ambient air, recirculated ambient air, and water spray. The coolant then returns to the beginning of its cycle. The temperature of outside air is the principal variable determining the proportion of heat recovered by the interior heat exchanger and the proportion extracted by the exterior heat exchanger. The total heat extracted reduces the coolant temperature to a predetermined operating level.