Disclosed is a combined energy supply system of wind, photovoltaic, solar thermal power and medium-based heat storage, capable of storing the energy which would have been “abandoned wind” and “abandoned light” temporarily in the form of heat by medium-based energy storage. Heat is released during peaks in the power grid to generate power, which serves the function of adjusting the peaks in the power grid. With the medium-based energy storage, unstable photovoltaic electric energy can be converted into stable heat energy output when a relatively large fluctuation occurs in wind and photovoltaic power generation, and therefore the stable supply of energy sources can be guaranteed efficiently. Furthermore, a second heater can also be used for heating the low-temperature media outputted by a first medium tank (100), or a third heater is used for heating water in a heat exchanger (500), and therefore the energy storage of the medium or the heating efficiency of the heat exchanger is improved.

Disclosed is an energy supply system using hot waste water that controls a supply of energy required according to a situation of agricultural facilities. The energy supply system includes a hot waste water pipe connecting a power plant and at least one facility so as to supply thermal energy to the at least one facility through hot waste water discharged from the power plant; a ground heat exchanger buried under a ground and connected to the at least one facility so as to supply geothermal energy to the at least one facility; at least one solar cell module disposed in the at least one facility and supplying electric energy to the at least one facility; and a server configured to individually control the thermal energy, the geothermal energy and the electrical energy supplied to the at least one facility according to an environmental state of the at least one facility.

A system for extracting work from the expansion of a working fluid includes a vessel having at least a portion of the working fluid, a heating device in thermal communication with the portion of the working fluid in the vessel for heating the portion of the working fluid in the vessel and expanding the working fluid, and a conversion tool. The conversion tool is in fluid communication with the vessel and is configured to receive working fluid from the vessel when the working fluid expands. The conversion tool is further configured to extract work from the expanded working fluid.

System for storage of electricity in the form of thermal energy, and release of thermal energy during times of demand. The system includes a unit for containing at least one electrically conducting phase change material and electrical circuitry for driving electrical current through the phase change material to heat the phase change material into a molten state, or at least one electrical heater used to convert electricity into heat stored in the phase change material. Structure is provided for transferring heat in the phase change material to a working fluid such as steam or gas for electricity generation in a steam turbine or gas turbine, capable of generating supercritical fluids. Structure is also provided for transferring heat in the phase change material to a thermal energy to electrical energy conversion device. A suitable phase change material is elemental silicon or an aluminum-silicon alloy.

The present invention is a renewable energy utilization engine power plant comprising; a solar radiant energy collecting system, wherein the solar radiant heat collecting system comprises; a focusing apparatus for collecting solar radiant energy, and a light guide for guiding the solar radiant energy collected by the focusing apparatus to a heating chamber; a biomass processing system, wherein the biomass processing system generates thermal energy from the conversion of biomass material; a combustible fluid processing system, wherein the combustible fluid processing system generates thermal energy from the combustion of the combustible fluid within the heating chamber; and a closed-cycle thermodynamic based engine driven by the collection of the solar radiant energy and thermal energy, wherein the mechanical power generated by the closed-cycle thermodynamic based engine is converted to electrical energy.

Disclosed is an air-compression energy-storage and power-supply system having air purification capability through using solar energy. The system includes: a solar energy power supply device, it utilizes solar energy to produce power for the system itself, and for users to use in daytime; an air purification device, with its exhaust fan connected to a transformer power distribution device to obtain the power for rotation, so that outside air flows into the air cylinder after filtering by the air filter, then the purified air is exited from the air cylinder to provide purified air; an air-compression energy-storage and power-supply device, used to compress the purified air into high pressure for storage, and the high pressure purified air is released at night, for the generator to produce power for user to use at night; and a wind power transmission device, disposed above the air purification device.

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.

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.

Disclosed is an air-compression energy-storage and power-supply system having air purification capability through using solar energy. The system includes: a solar energy power supply device, it utilizes solar energy to produce power for the system itself, and for users to use in daytime; an air purification device, with its exhaust fan connected to a transformer power distribution device to obtain the power for rotation, so that outside air flows into the air cylinder after filtering by the air filter, then the purified air is exited from the air cylinder to provide purified air; an air-compression energy-storage and power-supply device, used to compress the purified air into high pressure for storage, and the high pressure purified air is released at night, for the generator to produce power for user to use at night; and a wind power transmission device, disposed above the air purification device.