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Renewable Energy Solutions - Pugiotto, Screenshot 2025-01-20 at 1.55.08 AM…
Renewable Energy Solutions - Pugiotto
Geothermal Energy
Electricity-Generating Geothermal
Dry Steam
Dry steam geothermal energy includes using steam drawn directly from underground geothermal reservoirs to drive electrical turbines. It is taken from underground reservoirs rich in high-pressure and high-temperature steam. This steam naturally rises to the surface, is captured, and directed into turbines. The steam causes the turbines to rotate, connected to electrical generators that produce electricity.
Flash Steam
Flash steam geothermal energy involves extracting hot water from deep underground reservoirs where pressure keeps the water in liquid form, even at high temperatures. Upon reaching the surface, the pressure is reduced and flashes to steam. This steam is passed through a turbine where an axis of another relatively fast-moving turbine is connected and linked to a generator to generate electricity. After passing through the turbine, the steam condenses back into water and is often reinjected into the reservoir to maintain the pressure and sustainability of the system. Flash steam plants are normally used where the temperature of the water is above 182°C or 360°F and are effective in large-scale power generation.
Low Temperature/Direct Geothermal
Binary Cycle
Binary cycle geothermal electricity uses even lower-temperature geothermal resources by utilizing the heat from hot geothermal water to heat another liquid with an even lower boiling temperature than water. In turn, that second fluid vaporizes and drives a turbine connected to a generator. Since the geothermal water does not interface with the secondary fluid, it remains liquid and is re-injected into the reservoir. This reinjection process also allows binary cycle systems to operate from geothermal resources as low as 100°C (212°F), making them suitable for areas with moderate geothermal potential.
Heat pumps
Geothermal heat pumping is a technology that uses the stable temperature of the Earth just below its surface to supply heating or cooling to a structure. It comprises a heat pump, buried ground heat exchanger, and a closed pipe loop where fluid circulates. During winter, fluid passing through underground piping gathers heat from the soil. It reverses the process in summer, drawing heat from the building and transferring it back into the cooler ground. It is a highly energy-efficient means because it does not rely on outside air temperatures but on Earth's temperature, which remains constant.
Hydro Energy
Traditional Hydropower Systems
Hydroelectric
Hydroelectric power generates electricity, utilizing the momentum of water either in the form of runaway or falling streams. Water is stored in a reservoir behind a dam, and when freed, it lets the turbines begin to spin at the bottom. The propellers are mechanical and connected to electrical generators that convert such mechanical energy to electrical energy.
Pumped-Storage
Pumped-storage hydropower is an energy storage system that helps out the supply and demand for electricity. Essentially, it uses excess energy during periods of low demand to pump water from the lower reservoir upwards to the higher one. At times of higher demands for electricity, the stored water is released from the upper dam, flowing downwards to the bottom reservoir through the turbines, in turn generating electrical output.
Environmental-Based Hydro Power
Tidal
Tidal power utilizes ocean tides to generate electricity. It uses tidal turbines, much like underwater wind turbines, that are placed in areas with high tidal movements. It takes the energy received from the tides hitting the turbines and converts it into kinetic energy. With the help of a generator, it turns it into electrical energy.
Run-of-River
Run-of-river energy uses the natural flow of river water, without large reservoirs or dams. Water is diverted from the river into a channel or pipe where it subsequently passes through turbines to generate power. The water is then returned to the river downstream after passing through the turbines, thus minimizing disruption to the river's ecosystem. It is quite environmentally friendly in contrast to traditional systems because it maintains the natural flow and habitat of the river.
Solar Energy
Large-scale Solar Energy
Concentrated Solar Power
Concentrated solar power technologies use mirrors to capture sunlight onto a receiver, heating a high-temperature fluid. This fluid is typically salt, molten, or oil and, when heated, produces concentrated thermal energy. Subsequently, this energy is used to spin a turbine, hence generating electricity. These are commonly used for utility-scale projects.
Solar Farms
A solar farm is a substantial collection of photovoltaic solar panels which absorb energy from the sun, convert it into electricity, and send the electricity to the power grid to be distributed. They generally cover a vast area, and they contribute significantly to green energy.
Residential Solar Generation
Photovoltaic Panels
Like on solar farms, in homes, photovoltaic panels are used and are put on the roofs of houses and condos. When the sunlight hits the solar panel, it is actually hitting a semi-conductive material (usually silicon). The photons activate electrons, freeing themselves from the silicon. These electrons flow through solar cells, down a wire, along the edge of a panel, and then into a junction box as direct current. The current travels from the solar panel to an inverter, where it is changed into alternative current, which can be used to power homes and buildings.
Solar Water Heating
Solar water heating is where solar star collectors, either flat-plate or evacuated tubes, concentrate sunlight and convert it into heat. The heat will be transferred to the fluid, which may be in the form of water circulating through the collectors and passing to a heat exchanger. Ultimately, the heat exchanger will transfer the heat to the water tank, thus providing hot water for the home.
Wind Energy
High-Capacity Wind Energy
Offshore Turbines
Large, powerful wind turbines placed on water, referred to as offshore wind turbines, receive wind speeds stronger and steadier compared to onshore. Like traditional turbines, they operate in such a manner that the wind's kinetic energy serves to turn the turbine blades attached to a rotor driving an electrical generator. These turbines are fixed to the seabed by foundations, while the generated electricity is transmitted through underwater cables back to the onshore grid.
Hybrid Wind Farms
Wind farms include hybrid energy systems and floating wind farms. Hybrid energy systems combine wind turbines with other renewable energy sources, such as solar power or battery storage, making the supply more reliable and stable. These hybrid systems help wind generation by providing additional power when conditions for wind are poor, thereby assuring steady output of renewable energy.
Land-Based Wind Energy
Onshore Turbines
Similar to offshore turbines, onshore turbines include blades, a rotor, a nacelle (a housing containing the gearbox and generator),and a tower. When the wind hits the blades, they will start to rotate. This rotation of the blades is transmitted to the rotor, which is then converted into electrical energy. The generated electricity is transmitted through cables down the tower to the electrical grid for distribution. These turbines generally operate in areas like open fields, hilltops, or mountain ridges where wind speeds are optimal.
Distributed/local Turbines
Distributed, local wind turbines are small-scale systems installed at homes, farms, or businesses to generate on-site electricity. Energy from the wind turns blades connected to a rotor, which in turn is connected to a generator that produces electricity. They are relatively smaller compared to commercial onshore turbines and usually produce a few hundred watts to several kilowatts, hence more cost-effective and easy to install. A local turbine reduces dependence on the grid for energy, consequently reducing the bills accrued from this energy.
