Does Solar Power Contribute to Global Warming?

In summary, the conversation discusses the potential warming effects of using solar panels or other radiation capturing technologies. While some energy is captured and converted to electricity, the overall change in energy balance is too small to measure. However, in a scenario where all human energy consumption comes from solar panels in desert areas, the change in albedo may have a measurable impact on the net energy imbalance that is warming the earth.
  • #1
john t
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Does use of solar panels or other radiation capturing technologies in itself warm the earth? Since solar energy is radiated partially back to space, then, when a portion of it is captured and converted to electricity which performs work and rseleases heat (e.g. in transmission lines) it would seem we are radiating less back to space. Or, in fact does that released energy on Earth wind up going back to space just as efficiently through infrared radiation.
 
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  • #2
You have to compare with what is under the solar panel. If it is a black roof, then the reflection has not changed. In some cases, there could indeed be less Sunlight directly reflected back to space. But the overall change will be too small to measure.
 
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Likes russ_watters
  • #3
There's an interesting follow-on question that one could consider. Suppose you imagine an extreme future scenario where all human consumption of energy comes from solar panels installed in white sand deserts. In this case you are replacing high albedo surface area with low albedo panels which must absorb more than 4 – 5x the final energy consumption assuming a 20% to 25% efficiency for the solar panels. Now you are getting to a number which might actually be measurable relative to the net energy imbalance that is warming the earth.
 

1. How does solar power thermodynamics work?

Solar power thermodynamics works by converting the sun's energy into usable heat or electricity. This is achieved through the use of solar panels, which contain photovoltaic cells that absorb sunlight and convert it into electricity. The panels also contain a heat transfer fluid, which is heated by the sun's rays and then used to generate steam, which in turn powers a turbine to generate electricity.

2. Is solar power thermodynamics a reliable source of energy?

Yes, solar power thermodynamics is a reliable source of energy. The sun is a renewable resource, meaning it will not run out like fossil fuels. As long as the sun continues to shine, solar power can be harnessed to generate electricity. Additionally, advancements in technology have made solar panels more efficient and durable, making them a reliable source of energy for many years.

3. What are the benefits of using solar power thermodynamics?

There are many benefits to using solar power thermodynamics. It is a clean and renewable source of energy, meaning it does not produce harmful emissions or contribute to climate change. It also reduces our dependence on fossil fuels, which are a finite resource. Additionally, solar power can help lower energy costs and create jobs in the renewable energy sector.

4. Are there any limitations to using solar power thermodynamics?

While solar power thermodynamics has many benefits, there are also some limitations to consider. One of the main limitations is that it is dependent on sunlight, meaning it may not be as reliable in areas with frequent cloudy or overcast weather. The initial cost of installing solar panels can also be a barrier for some, although the long-term savings on energy bills can make up for this cost.

5. Can solar power thermodynamics be used for both residential and commercial purposes?

Yes, solar power thermodynamics can be used for both residential and commercial purposes. In fact, many homes and businesses are already utilizing solar panels to generate electricity. The size and type of solar power system may vary depending on the energy needs of the building, but the basic principles of converting sunlight into usable energy remain the same.

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