Generators are inexpensive.
The lowest cost of electricity production is nuclear energy, followed by thermal energy (coal), hydroelectricity, wind energy...
The four main sources of energy are thermal energy and hydroelectricity. , wind energy and nuclear energy.
Although thermal power pollutes the environment, hydropower increases geological disasters, the utilization rate of wind power is low, and nuclear power poses serious safety risks , the operating costs of these four energy sources are low, so more than 90% of the world's energy sources come from thermal power, hydro power, wind power and power nuclear.
Small renewable energy power plants include the production of electricity by direct combustion or gasification of biomass (agricultural waste and forestiers), biogas electricity production, photovoltaic solar energy production, wind energy, small hydroelectricity, geothermal energy production, etc. Affected by environment, geographic resources, construction costs, etc., the scale of this type of power station generally cannot be too large. According to the practice of the electricity industry, the cost is expressed in unit cost yuan/kw. Environmental conditions vary from place to place, and the cost also varies. The smaller the installed capacity, the higher the unit cost, but there is a general spectrum:
Biomass (agricultural and forestry waste) direct combustion. Power plant: 8,500 to 10,000 yuan/kw
Electricity production by biomass gasification: 11,000 to 15,000 yuan/kw
Biogas power plant: 9,000 at 30,000 yuan/kw (imported equipment is more expensive)
Photovol solar power planttaic: 8.5-10 yuan/Wp (photovoltaic power plants are generally small, represented by Wp - peak watt, which can be understood in watts)
Wind power: 8,500-9,000 yuan/ kw
Small hydropower: 8,000-12,000 yuan/kw
Geothermal power plant: 12,000-15,000 yuan/kw