Our increasing reliance on natural gas brings with it both opportunities and dangers during the shift towards renewable energy. This issue deals with some major issues regarding natural gas deployment in industry, power generation, food production, and heating.
Demand side management helps make our power grid more cost-effective and aids in the transition towards renewable energy. It can also be considered as a very green policy on its own, as it reduces the amount of power we need to produce, and thus our impact on the environment.
Everything has its price. Every form of power production has costs in dollars, time, land, materials, pollutants, greenhouse gas emissions, and human deaths. We look at the most important factors for analyzing the feasibility of a proposed power project. Considering only some of these factors will lead to an incomplete picture of power system costs.
Here we talk about what a feed in tariff is and how it works. We also conduct an overview of how effective feed in tariffs have been at stimulating the renewable energy industry around the world.
Wind power expert Paul Gipe advocates that we deliberately create our green energy future rather than wait around for it to happen. He says that we should aim to democratize our energy production for a more prosperous future.
Achieving sustained nuclear fusion for power production is incredibly challenging. Scientists have been working on this problem for decades. This piece is an overview of the basic concepts and technologies needed for nuclear fusion power. One could also view this as a tutorial, or a crash-course, in fusion power.
Land usage for power systems is a common comparison metric. We demonstrate here that the comparison cannot be conducted meaningfully on such simplistic grounds. Additional factors must be taken into consideration.
Hydroelectricity, or ‘hydro’, is generated from the energy in the water cycle of the earth. The sun evaporates water on the surface of the earth, causing it to rise up to form clouds. Clouds eventually form droplets, which then rain, snow, or hail down to the surface. Water on the surface flows downhill until it evaporates again. During this time it may become trapped in glaciers, lakes, ponds, puddles, or the ocean. Driven by the sun, the water cycle is a truly renewable resource.
The long term supply for nuclear fission fuels on the planet earth is estimated to last several thousand years at current consumption levels, assuming that we adopt reprocessing as well as develop and implement breeder reactors.
The intent of this publication is an ongoing investigation of the progress and potential of renewable energy in our world. Our goal is to collect the best writing and news on the subject of renewable energy projects and policies. We have observed that humanity is innovating rapidly as the energy security of the future becomes a global priority. Current trends indicate that the age of coal will end before we run out of coal.
Photovoltaic solar power is the technical term for solar panels that convert sunlight directly into electricity. This is in contrast to techniques that capture solar energy in other ways, or for different uses. Other techniques include hot water heating, interior temperature control, and concentrated heat for electricity production.
We have been captivated for a long time by the intriguing possibilities inherent in combining Manitoba’s extensive hydro resources with Saskatchewan’s high-quality wind power. A number of other groups in Saskatchewan have been lobbying for greater interconnection between the two power grids to take advantage of the natural synergy that exists between wind power and reservoir-based hydro power.
Our goal is to keep our physical power infrastructure publicly owned, but gain some of the advantages of the private sector. The key to our recommendation is voluntary public investment from the people of Saskatchewan. In order to stimulate new renewable energy construction, we recommend that SaskPower open up renewable energy projects for direct public investment.
We want the ability to directly support the development of renewable electricity generation. We don’t just mean buying GreenPower from sources that already exist. We want to be able to choose to put our money out there so that these things can actually happen. We want to support projects that haven’t yet been built, or even started.
Solar thermal power generation presents a unique opportunity among renewable technologies today. It is well-understood. Prototypes and commercial power plants of this sort exist. It has capabilities for both baseload and peak-matching power generation. It is affordable in locations with lots of sunlight. Costs are in the range 10-15¢/kWh currently, with great potential for the future.
The feed-in tariff is a well known policy mechanism in the area of electricity generation. It has been applied in many countries with the intent of encouraging the development of renewable power generation. Such a policy typically involves guaranteeing to desired types of generation both subsidized long term prices for electricity and guaranteed grid access. This policy has been well utilized notably in Germany and Spain, where residents have seen very stable electricity prices coupled with tremendous growth of the renewable energy sector of their economies.
When wind isn’t blowing hard, use a dispatchable source such as hydro to produce power. Let’s assume that we have 150 MW of hydro on hand to cover the Centennial Wind Farm when the wind isn’t blowing. If we look at entire year of production, we can expect that about 42.4% of all energy will have come from the wind, and that the remaining 57.6% of the energy would have come from the hydro. What is necessary for a system like this to work is to have enough water behind the hydro dam that it can cover a fairly long spell of low winds. This could be as long as several days. If our hydro reservoir is big enough to cover that time, we should be able to cover the intermittent nature of the wind for the whole year. If it isn’t big enough, we will have to get our power from elsewhere. Perhaps importing it from neighboring grids or by using another source such as natural gas.
What people really want is reliable power. We don’t want to end up freezing in the dark. Electricity is important enough to our society that our energy security is of great importance to us. This is a fundamental issue that all technically advanced nations have to face.
It would be a mistake to equate baseload with reliable. Baseload power sources still have to turn off sometimes. In some cases, the downtimes for the big thermal plants such as nuclear and coal can be several percent of their lifetimes. If our power grid were based off of only baseload sources of this type we might see rolling blackouts now and then unless we built extra power plants to cover the downtime.
In the most general sense, we are talking about moving power from one place to another. The electric grid accomplishes this by having power lines between generation stations and demand locations such as homes and businesses. Some general rules apply to this sort of technology. The more power you have to move, the more expensive it will be to build the infrastructure to do it. The further you have to move the power, the more energy losses you are going to have in doing so. These rules apply in general, but the specifics of a problem will dictate what sort of solution is applied.
We proposed a feed-in tariff for renewable energy resources such as wind, solar, and hydro power. What this means is basically that people or companies who produced power from these sources would be paid more for their electricity than non-renewable providers. See our proposal for more details about the practicality and effectiveness of a feed-in tariff as well as more detail on tailoring the solution for Saskatchewan. The intent of this policy mechanism is to stimulate an increase in private investment into these technologies.
If you think of renewable sources of energy you probably think of things like wind turbines, solar panels, biomass plants, and hydroelectric plants. However, these are just examples. What does it mean to be renewable?
A Feed-in-Tariff is a policy mechanism designed to provide an incentive for development of a desired type. Typical implementations of feed-in-tariffs for power generation usually involve guaranteed long term prices for electricity generated and guaranteed grid access. This means that if a person or company builds this type of desired generation, they are guaranteed to be able to sell their power, and guaranteed a minimum price for their power.
Energy storage is the saving some form of energy for later use. Energy is critical to every accomplishment of humans. This energy can take many forms. Some examples include potential, kinetic, chemical, and nuclear energy.
Energy storage is critical to the stable function of a power grid. Inevitably, power stations have to be serviced or have failures. Even failures that are a fraction of a second can be disastrous for certain applications, such as monitoring systems for heavy machinery, computers, and other sensitive electronics. Stability of power is a key factor in the design of an effective power grid. Stability requires that there be backup systems in place in case of a baseline power failure. Energy storage is required for most backup systems to be effective.
Hydroelectric power generation is the act of using moving water to generate power. Historically this was done using paddle wheels in streams to turn grinding stones for making grain flour. Today, most hydroelectric dams are of a larger scale. A hydro dam location is chosen because it has a large amount of flowing water that can exit the dam at a much lower height than it was taken at. As in a waterfall, the waters falling through the dam generators speed up and drive turbines, generating power.
“Wind Power” is the extraction of energy from the wind. Common techniques use a tower with a set of propeller blades that will spin when wind blows against them. Wind power is a renewable form of energy because wind is caused by the uneven heating of the earth by the sun.