Abstract: In one aspect, a device of the present invention can include a liquid exchange portion comprising: a first thermal reservoir, a liquid circulation channel configured to connect the first thermal reservoir to a second thermal reservoir, and a liquid pumping device configured to circulate liquid, via the liquid circulation channel, between the first thermal reservoir and the second thermal reservoir; and a disinfecting portion including a light emitting diode (LED), a heat sink, an insulating layer arranged on the second thermal reservoir, the insulating layer including an orifice arranged over the LED such that light from the LED passes through the orifice in the insulating layer, and a front layer arranged on the insulating layer arranged over the orifice. Also provided herein are garments comprising the disclosed devices, and methods for making and using the disclosed devices and garments.

Abstract: A device comprises a thermal reservoir, a light emitting diode (LED), a heat sink connecting the LED to the thermal reservoir and an insulating layer arranged on the thermal reservoir, the insulating layer including an orifice arranged over the LED such that light from the LED passes through the orifice in the insulating layer.

Abstract: A system for generating power from a flow of liquid having at most fifty feet of head and a flow rate of at most 300 cubic feet per second, includes: an axial-flow turbine, a penstock, an intake, a generator, and a control circuit. Each blade of the turbine runner is releasably coupled to the hub and each blade: 1) is configured to extract energy from liquid flowing through the runner by rotating the hub when the flow of liquid contacts the blade, and 2) has a pitch that is adjustable. The length of the penstock is adjustable. The generator is operable to generate electric power from rotation of the turbine. The control circuit to determines changes in the flow of liquid and in response modifies at least one of the following: 1) the speed of the axial-flow turbine's hub, and 2) the flow of liquid that the runner receives.

Abstract: A turbine replacement unit for replacement of at least one double runner horizontal submersible installation for a hydroelectric plant including at least one submerged coupling and at least one submerged bearing supported by a submerged bearing pedestal in which each of the two runners discharge a flow into a common draft tube. The replacement unit includes a single runner positioned to replace each of the two runners, the single runner receiving a flow and discharging the flow into the existing common draft tube. A dry pit assembly is positioned to surround the submerged pedestal and define an air space around the submerged pedestal and an oil-flooded bearing is positioned on the pedestal to replace the submerged bearing. A shaft supports the runner for rotation and is at least partially supported for rotation by the oil-flooded bearing. A generator is coupled to the shaft and is operable to produce an electrical power in response to rotation of the shaft.