Abstract: Heliostats are utilized to direct solar energy to a target configured for collecting the solar energy. The heliostats include mirrors that are adjustable so as to track the position of the sun relative to the target as the position changes over time. The heliostats are configured for self-alignment without the need for external control or surveying.

Abstract: An exhaust gas water extraction system includes an evaporator component in a diffusion absorption refrigeration ('DAR?) unit. The system also includes an exhaust gas input duct comprising an input opening to receive exhaust gas from an exhaust gas source. The exhaust gas input duct operates as a heat source to power the DAR. An evaporator heat exchanger is connected to receive the exhaust gas from the exhaust gas input duct. The evaporator heat exchanger is disposed to generate a heat exchange between the evaporator component and the exhaust gas that cools the exhaust gas to below the dew point. A water collection container receives water condensing from the exhaust gas during the heat exchange with the evaporator component.