Abstract: Redox flow devices are described including a positive electrode current collector, a negative electrode current collector, and an ion-permeable membrane separating said positive and negative current collectors, positioned and arranged to define a positive electroactive zone and a negative electroactive zone; wherein at least one of said positive and negative electroactive zone comprises a flowable semi-solid composition comprising ion storage compound particles capable of taking up or releasing said ions during operation of the cell, and wherein the ion storage compound particles have a polydisperse size distribution in which the finest particles present in at least 5 vol % of the total volume, is at least a factor of 5 smaller than the largest particles present in at least 5 vol % of the total volume.

Abstract: A low profile, externally controlled, variable pitch fan blade hub assembly is disclosed which is especially useful in high humidity environments such as are encountered in the fan induced, hot air discharge section of an industrial water cooling tower. The hub housing has central hub means including a member which is telescoped over the drive shaft therefor to limit the overall height of the assembly. The hub member is biased axially of the hub by a series of peripherally located springs contained within the housing. A fluid such as air may be introduced into the housing under pressure to shift the hub unit in a direction against the spring bias thereon. The housing has a plurality of radially extending bores each of which rotatably receives a respective fan blade axle provided with an elongated arm on the innermost end thereof within the housing positioned such that a cam follower on each arm is received in a cam track forming a part of the hub unit.

Abstract: A simplified, selectively actuatable deicing apparatus for evaporative water cooling towers is provided which permits selective delivery of hot water from the upper distribution basin to the outer margin of the tower for deicing of the fill structure and inlet louvers thereof in order to maintain adequate airflow through the tower during sub-freezing ambient conditions. The deicing apparatus includes a substantially continuous slot in the bottom of the distribution basin adjacent its outer margin, in combination with valving devices for directing the flow of hot water through any selected segment of the slot to the underlying outer margin of the tower. The hot water carrying flume which feeds the distribution basin has a normal water level spaced above the bottom of the basin and is in direct flow communication with the latter at an elevation corresponding to its bottom such that a substantial part of the tower water is available for delivery through the selected segment of the slot.

Abstract: A simplified, selectively actuatable deicing apparatus for evaporative water cooling towers is provided which permits selective delivery of hot water from the upper distribution basin to the outer margin of the tower for deicing of the fill structure and inlet louvers thereof in order to maintain adequate airflow through the tower during sub-freezing ambient conditions. The deicing apparatus includes structure defining a substantially continuous water passageway or slot in the distribution basin adjacent the outer margin thereof, in combination with valving devices in the form of a series of elongated, individually shiftable cover members which can be selectively raised to permit flow of hot water through the slot in sufficient quantities to deice the outermost areas of the tower which are prone to ice clogging.