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How would you characterize rejected energy, if not wasted? What is your take on Seetee?
by knifefight 6y ago
How would you characterize rejected energy, if not wasted? What is your take on Seetee?
- dcow 6y agoWhat is Seetee and why is it relevant to this discussion (genuine question, I don't know)?
- knifefight 6y agoA new Bitcoin mining company founded by a Norwegian energy company, focused on Bitcoin and renewables.
- Robotbeat 6y agoThat doesn’t explain how it’s relevant.
- okl 6y ago> The energy is not wasted, it is ordered, not demanded and thus never produced.
- amelius 6y agoThere is no rejected energy. If there is an overproduction of energy, the price goes down (it may even go negative), and industries will consume the energy.
- knifefight 6y agoAccording to Lawrence Livermore Labs 2/3rds of all energy produced is rejected. There is a graphic in the article.
- okl 6y ago"Rejected" does not mean that the energy gets sent back to the producer like a parcel. "For a coal fired power station, for instance, about 2/3 of the energy released when the coal is burnt is discarded as heat in the environment. This reject energy sometimes appears as clouds of vapour coming off a power-station’s cooling towers, such as the well-known ones at Didcot in England." -- https://energycultures.org/2014/07/rejected-energy-much-energy-unloved/ https://energycultures.org/2014/07/rejected-energy-much-ener...
- deleted 6y ago[deleted]
- fsh 6y agoThis is a complete misinterpretation of the graphic. The "Rejected Energy" are the losses that occur when converting primary energy on the left into useful energy on the right. In a car, for example, this would be the difference between the chemical energy contained in the gasoline and the mechanical energy used to accelerate the car and overcome the drag during driving. In a thermal power plant it would be the difference between the heat released when burning the fuel and the electricity produced. As others have pointed out, the power grid does not even have the capability to "burn off" excess power. It is simply nerver produced in the first place.
- imtringued 6y agoThe graph is absolutely meaningless to me without further contex. So, the electric grid generates 12.7 "units". If we subtract solar, wind and hydro then we get down to 6.42 "units". I have chosen these because they are not thermal power sources. These power sources generate an almost equivalent amount of primary energy and electricity. So we are left with 6.42. 6.42/31 is 20%. Where are these 20% efficient power plants? Nuclear alone would be 30% efficient. Combined cycle gas is 50%. The numbers make no sense to me. Edit: Ok I read the note at the bottom and the graph literally adjusts the rejected energy of renewables to match thermal power plants. Assuming 33% efficiency that means 12.56 phantom units of energy that never even existed in the first place are being rejected.
- Robotbeat 6y agoThermodynamics is why. It’s not because of running big resistor banks.
- tedunangst 6y agoEvery time I play Tomb Raider I'm rejecting 300 watts per hour. How do you propose turning that into Bitcoin?