A new method of accumulating thermal energy in the bowels of the Earth to ensure stable, continuous operation of a solar thermal power plant.

The solution of underground storage of heat will be useful for: Expansion of the solar thermal energy geography. Extension of the scope of existing geothermal technologies. Combining the mutual interests of energy-generating and oil-and-gas companies on the platform of new opportunities for using advanced technologies of each other.

A zero-emission, closed-loop and hybrid solar-produced syngas power cycle is introduced utilizing an oxygen transport reactor (OTR). The fuel is syngas produced within the cycle. The separated oxygen inside the OTR through the ion transport membrane (ITM) is used in the syngas-oxygen combustion process in the permeate side of the OTR. The combustion products in the permeate side of the OTR are CO.sub.2 and H.sub.2O. The combustion gases are used in a turbine for power production and energy utilization then a condenser is used to separate H.sub.2O from CO.sub.2. CO.sub.2 is compressed to the feed side of the OTR. H.sub.2O is evaporated after separation from CO.sub.2 and fed to the feed side of the OTR.

A zero-emission, closed-loop and hybrid solar-produced syngas power cycle is introduced utilizing an oxygen transport reactor (OTR). The fuel is syngas produced within the cycle. The separated oxygen inside the OTR through the ion transport membrane (ITM) is used in the syngas-oxygen combustion process in the permeate side of the OTR. The combustion products in the permeate side of the OTR are CO.sub.2 and H.sub.2O. The combustion gases are used in a turbine for power production and energy utilization then a condenser is used to separate H.sub.2O from CO.sub.2. CO.sub.2 is compressed to the feed side of the OTR. H.sub.2O is evaporated after separation from CO.sub.2 and fed to the feed side of the OTR.

Method for conversion of energy, by which a sun energy, or heat energy, or radiation energy is converted in an other form of energy, where the energy in its heat form or in the form of radiation is supplied to a vaporizer of a heat pipe, and this energy is converted in the energy of a working gas of the heat pipe through (as a consequence of) the absorption of this energy by the working liquid of the heat pipe; the energy in its heat form is extracted (conducted away) from the condenser of the heat pipe, and the energy of movement of the gas of the heat pipe is converted in others, not heat forms of energy, in particular into electric energy, where additionally to the capillary or gravitational forces, usually acting in the heat pipe transport zone to recover the heat pipe liquid, an additional energy, in its mechanical or electrical or any other not-heat form, is supplied to the working liquid of the heat pipe, among other possibilities, from outside in respect to the heat pipe, and this additional energy is converted in a mechanical energy of a mechanical movement of this heat pipe working liquid, and at the same time one directs the gas flow from the vaporizer to the condenser through one or several constrictions, where the cross-section area of this constriction or these constrictions in the plane, which one is perpendicular to the direction of the gas flow, is essentially mach less than an average cross-section area of the vaporizer or condenser, which way an effectiveness of energy conversion is increased.

A solar drive system, having: at least one photovoltaic array generating a DC current; at least one inverter electrically connected to the photovoltaic array for inverting the DC current into an AC current; at least one electric motor electrically connected to the inverter for supplying the electric motor with the AC current; and at least one device for determining a present rotational frequency of the electric motor; wherein the inverter is configured to track a maximum power point of the photovoltaic array by performing a Perturb and Observe Maximum Power Point Tracking method and to determine a step direction of the Perturb and Observe Maximum Power Point Tracking method using the determined present rotational frequency of the electric motor.

A system for providing access to a wireless communication network can include a plurality of renewable energy structures. Each renewable energy structure can include an electricity generation assembly, a telescoping support pole positioned to support the electricity generation assembly, and a wireless communication device configured to relay wireless communication signals between a host signal source and a client device. The electricity generation assembly can include a wind turbine assembly and/or a solar power structure. The wireless communication device can include a cellular telephone signal repeater and/or wireless internet equipment. Each structure can include a display, such as an advertisement, one or more benches, and/or a container. Each structure can optionally include a water purification system, one or more cameras, one or more lights, and/or one or more motion or voice sensors for activating or deactivating various components of the system. Each structure may be permanently installed or mobile.

Method for conversion of energy, by which a sun energy, or heat energy, or radiation energy is converted in an other form of energy, where the energy in its heat form or in the form of radiation is supplied to a vaporizer of a heat pipe, and this energy is converted in the energy of a working gas of the heat pipe through (as a consequence of) the absorption of this energy by the working liquid of the heat pipe; the energy in its heat form is extracted (conducted away) from the condenser of the heat pipe, and the energy of movement of the gas of the heat pipe is converted in others, not heat forms of energy, in particular into electric energy, where additionally to the capillary or gravitational forces, usually acting in the heat pipe transport zone to recover the heat pipe liquid, an additional energy, in its mechanical or electrical or any other not-heat form, is supplied to the working liquid of the heat pipe, among other possibilities, from outside in respect to the heat pipe, and this additional energy is converted in a mechanical energy of a mechanical movement of this heat pipe working liquid, and at the same time one directs the gas flow from the vaporizer to the condenser through one or several constrictions, where the cross-section area of this constriction or these constrictions in the plane, which one is perpendicular to the direction of the gas flow, is essentially mach less than an average cross-section area of the vaporizer or condenser, which way an effectiveness of energy conversion is increased.

According to examples of the disclosure there is provided a heat-driven pumping system and a method of pumping. The heat-driven pumping system comprises a closed circuit for a first liquid. The closed circuit comprises a vaporization portion. The vaporization portion is configured to receive heat from an external source. The vaporization portion is configured to cause vaporization of first liquid within the vaporization portion. Vaporization of first liquid within the vaporization portion thereby increases an amount of gas in the closed circuit. The closed circuit is sealed such that the increase in the amount of gas increases a pressure exerted on the first liquid. The heat-driven pumping system comprises a transfer means. The transfer means is configured to convert the pressure exerted on the first liquid into a pumping force. The pumping force is transferred to a pumping vessel for pumping a second liquid.

According to examples of the disclosure there is provided a heat-driven pumping system and a method of pumping. The heat-driven pumping system comprises a closed circuit for a first liquid. The closed circuit comprises a vaporization portion. The vaporization portion is configured to receive heat from an external source. The vaporization portion is configured to cause vaporization of first liquid within the vaporization portion. Vaporization of first liquid within the vaporization portion thereby increases an amount of gas in the closed circuit. The closed circuit is sealed such that the increase in the amount of gas increases a pressure exerted on the first liquid. The heat-driven pumping system comprises a transfer means. The transfer means is configured to convert the pressure exerted on the first liquid into a pumping force. The pumping force is transferred to a pumping vessel for pumping a second liquid.

Disclosed is a solar power station, comprising a first light-receiving device having a substantially planar first working surface, a second light-receiving device having a second working surface substantially perpendicular to the first working surface, and a first drive mechanism. The first and second working surfaces are configured so that sunlight (SS) strikes the first working surface after passing through the second working surface or passes through the first working surface and then strikes the second working surface. The second light-receiving device is fixed on the first drive mechanism. The first drive mechanism is used to drive the second working surface to move or rotate relative to the first working surface according to the movement of the sun.