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Renewable energy is energy that is generated from natural resources that are continually replenished. Sources of renewable energy include the sun, wind, moving water, and heat. Renewable energy can replace more traditional sources of energy, such as fossil fuels or nuclear, in four main areas: electricity generation, water/space heating, motor fuels, and off-grid applications.
We have provided our customers helpful information on renewable energy solutions and programs. You can check out our information on renewable energy sources or
Interconnection and Net Energy Metering. You can also contact ourGreen Energy Advisers for more information.
Renewable energy sources can be replenished in a relatively short period of time, are not tied to volatile foreign energy market conditions, and have less environmental impact than traditional energy sources. They can reduce the need for transporting electricity through cables, poles, towers, etc. However, some of these sources cannot always stay “on,” which can reduce the availability to our customers.
A Renewable Portfolio Standard (RPS) is a regulation that requires the increased use of renewable energy. All the areas we serve have regulated standards that require these goals are met every year. The standards carefully balance the mix of renewable energy sources and traditionally generated electricity to ensure we can provide a reliable supply to our customers.
This means you and future generations can enjoy plentiful energy resources, energy security and a cleaner environment. Focusing on renewable energy sources means that each individual has a greater opportunity to make a difference in our carbon footprint, which can translate to a more secure energy future and environmentally friendly future for all. Renewable Energy Sources
We are committed to using renewable energy sources and working towards increasing this use all the time. Renewable energy can come from the sun, wind, biomass, earth and water.
The sun has produced energy (solar radiation) for billions of years. This energy can be converted into other forms of energy, such as heat and electricity.
When converted to thermal (or heat) energy, solar energy can be used to heat water, spaces or other fluids.Solar energy can be converted to electricity in two ways:
Photovoltaic (PV) or “solar cells” change sunlight directly into electricity. PV cells are grouped into panels and panels are grouped into arrays. PV cells can be used in a wide range of applications from a few cells powering a calculator, to a bunch of panels that power single homes, to many acres of panels that become a large solar power plant.
Solar thermal/electric power plants generate electricity by concentrating solar energy to heat a fluid and produce steam that is used to turn a generator.
Does not produce air pollutants or carbon dioxide
Sunlight is abundant
Generate electricity directly from sunlight and have no moving parts
Greatest energy source when air conditioning demand is highest
Minimal impact on the environment
Sunlight is not constant - it varies depending on things such as location, time of day, time of year, and weather conditions
Relatively high initial cost for PV (Installation, PV panels, and Balance of System)
Requires expensive storage or grid connection to maintain uninterrupted electricity
Because sunlight is not focused on any one particular spot at any one time, a large area is required to collect enough useful energy
Wind, which is caused by the uneven heating of the Earth’s surface by the sun, can be used to generate electricity. A wind turbine is used to collect the wind’s kinetic energy from its blades and converts the motion of the blades to electricity with an electric generator.
Costs continue to decrease
Often more available during seasons with higher electric demand
Wind turbines do not release any emissions
Wind turbines have a small physical footprint
Wind resources are difficult to map and predict
The wind is not always constant
Some people do not like the visual impact of wind turbines on the landscape or the sounds the blades make while spinning around
Wind turbines are criticized for bird and bat deaths, although more deaths are caused by house cats and collisions with cars and buildings
Biomass is organic material from plants or animals. When considering the process of photosynthesis, biomass essentially contains stored energy from the sun. When burned, the chemical energy from the biomass is converted to heat and can be converted to electricity.
Biomass is renewable because new crops can be grown in a relatively short period of time and they will always create waste. Examples of biomass fuels are wood, crops, manure, and garbage.
Widely available and abundant
Generally low cost inputs
Can be domestically produced for energy independence
Low Carbon (carbon neutral) and generally cleaner than fossil fuels
Can minimize negative environmental impacts of landfills and farms
Energy intensive and expensive to produce and sometimes to transport.
Land utilization can be considerable and may lead to deforestation
Requires water to grow crops
Not 100% clean when burned
Can compete with food production
Some types are seasonal
Not easily scalable
Geothermal energy is generated from the heat from within the earth. The heat can be moved to heat buildings or generate electricity. Heat from the earth is constantly replenished and thus renewable. The three main uses of geothermal energy are: direct use for heating systems, electricity generation power plants and geothermal heat pumps.
Emission free with no carbon emissions
Can scrub out sulfur which would have been otherwise released
Requires no fuel, mining or transportation
Not subject to the same fluctuations as solar and wind
A small land footprint
Simple and reliable
Can provide base load or peak power
Very location-specific - prime sites for generation plants are located near plate borders and not necessarily near large populations
High construction costs when considering drilling
High level of planning and heat management
Hydropower is energy produced from moving water. Since hydropower relies on the earth’s water cycle to replenish the water supply, hydropower is considered renewable.
Two main sources of hydropower are the natural run of rivers and storage systems such as a dam. Mechanical energy is harnessed from the moving water from these sources and can turn an electric generation turbine to produce electricity. Ocean tides and waves can also be a source of energy, however they are not as prevalent as the use of dams and rivers.
Electricity generation itself does not pollute environment
Flexibility - adjusting the water flow and electric output is easy
Compared to fossil fuels and nuclear energy, hydropower is much safer
Unpredictable environmental and biological consequences from the damming of water, changing water flow and infrastructure construction
Building power plants may be expensive
A drought could affect electricity generation and energy prices
Reservoirs that can be dammed are limited due to difficultly in siting