Tom doesn't realize that to cool a gas while it's being compressed requires heat rejection to something colder.Tom Booth wrote:Fool doesn't seem to understand that cooling air as it is being compressed makes the compression much easier.
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Tom doesn't realize that to cool a gas while it's being compressed requires heat rejection to something colder.Tom Booth wrote:Fool doesn't seem to understand that cooling air as it is being compressed makes the compression much easier.
Fool also doesn't realize temporarily "moving" heat with a heat pump, storing it and utilizing it to generate power is not "rejecting" or "wasting" it.
I might pay them a visit. It's not that far from here where I live. Just across the state line, within easy driving distance.
https://www.nacleanenergy.com/alternati ... e-change-1
Generating Renewable Energy Out of Thin Air:
Jan 15, 2022
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Understanding this new renewable energy technology requires a brief history lesson featuring two great minds. In 1662, Robert Boyle discovered the relationship between the volume and pressure of air and, later, temperature. What soon became Boyle's Law underpins the almost unbelievable amount of energy our planet holds in the air. The sun stores its energy in air, which makes our planet the largest solar collector possible - and we didn't even have to build it. The earth accesses the air's energy regularly through wind, storms, and rain. The question is, how do we tap into that energy?
Thanks to Archimedes, we understand the reason that ships float: the displacement principle, which relies on the pressure and volume of the air.
Boyle meets Archimedes
The first step on the path to this new renewable energy technology required building a device using air to displace a liquid, thus creating the force to drive a turbine to - Eureka! - make electricity. The device, using a tower, passed proof of concept testing in 2015, demonstrating that it is possible to convert energy in the air into electricity.
This proof of concept also identified three areas that needed to be addressed in order to produce enough electricity to be considered a viable energy source.
1. Compress the air using less energy
2. Make the tower shorter and less expensive
3. Keep the system running in a continuously steady state
The first change - making the air with less energy - was the hardest. As it turns out, the solution to the first challenge also solved the third challenge. Using Boyle's Law as a reference, removing the heat from the air after compression helped reduce energy. It had to be more than just passive cooling to ambient temperatures. The energy saving happened post-compression. This new solution performs only a little work at a time: It cools the air to near freezing, and then passes the energy savings on to subsequent compression cycles. This process shifts the work of air compression to a heat pump which, thanks to the Coefficient of Performance (COP), delivers higher efficiency with less power consumption. This cascading compression system uses 50 percent less energy.
Choosing a heat pump as the means of removing the heat solved the third problem e.g., keeping the system running in a continuously steady state, and required determining how to return the heat back to the air after passing it through the tower.
The heat can return to the air as it re-expands in the tower; the heat pumps can collect the heat, which is then removed from the air compression process (adiabatic). Using the same cascading idea in the heat pump also significantly lowered energy cost in the heat pump system. The cascading heat pump has a 300 percent increase in the COP.
The solution to the second challenge - lowering the height and cost of the tower - involved making the fluid heavier. Doing so created a larger displacement force that mimicked the conditions of a taller tower without the costs associated with actually building one.
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One of the biggest advantages over other renewable technologies is that this new system operates 24/7 and requires no large battery storage. ...
In summary, this new technology converts a small amount of energy from the surrounding ambient air into electricity. It then returns the same amount of energy back into the air - minus the amount of heat energy that was converted into electricity. This occurs through a combination of highly efficient compressed air, isobaric heat collection, and weight displacement.
Collectively, these processes require less electricity to operate than the energy being moved in the system. ...
That's more or less how I feel about it.