Chapter Eight: The World's Largest Battery

"A ten-times increase in the weight-oriented density of batteries would enable so many other moonshots, and we will start that moonshot if we can find a great idea."
- Astro Teller

The National Aqueduct is designed to transport an effectively unlimited amount of desalinated water from the coasts to anywhere inland. Powered by Scarcity Zero, it can deliver on that promise. But like many of the systems included within the framework, the National Aqueduct is not a one-trick pony. It has additional functions to generate electricity and to serve as a battery for renewable energy on a massive scale.

To consider a nationwide array of water pipelines a “battery” of any sort may seem strange – especially since “batteries” technically require a chemical reaction to facilitate an electric charge. But the National Aqueduct would have the same effect as a battery in function – far beyond that of the Bath County Pumped Storage Station in Northwest Virginia, a similar concept of pumped-storage hydroelectric power that remains the largest of its kind in the world (currently).[1]

By taking advantage of three aspects of the water transmission system – surface area for solar power, water flow for hydroelectric power, and water heat for thermoelectric power – we have a platform on which to build potent external electricity generation and storage systems.

Best of all, as with CHP Plants, these systems can work together in a cogenerative capacity, presenting additional benefits.

To explain how, we’ll go through each of these three aspects.

Surface area for solar panels. Scarcity Zero intends to deploy National Aqueduct pipelines at the side of highways or under currently existing long-distance power lines. That’s because this land is usually state-owned and doesn’t need to be purchased, and also because it’s pre-cleared of obstructions. If you recall from last chapter, water pipelines are designed to be installed in prefabricated arrays, which boast relatively flat surfaces. So, what if we were to cover their surface area with solar panels? The result, in the following image, is the final intended form of National Aqueduct pipeline arrays:

National Aqueduct pipelines integrated with solar panels

Across the thousands of miles such pipeline arrays would span, integrating them with solar panels stands to generate extremely high levels of electricity – far beyond any single power plant.[2] Alongside solar road networks and other municipally integrated renewables, they can also help reinforce a redundant, smart electric grid.

To see how, let's assume solar-enabled water transmission pipelines had a surface width of 10 feet. Multiplied by a mile, that's 52,800 square feet. Going back to our estimate of 30 kilowatt-hours annually generated per square foot, a one mile stretch of solar-integrated pipelines would generate 1.58 million kilowatt-hours per year – enough to power 150 homes. Keeping in mind that there are four million miles of road surfaces in the United States,[3] even fractional integration would be sufficient to power tens of millions of homes. Total integration, hypothetically, would annually generate 6.32 trillion kilowatt hours – nearly twice our annual national energy consumption. And that’s just from one of three power sources of the National Aqueduct.

Integration with wind turbines. Across the wide, open expanses of rural America, wind power is especially effective. Placement in close proximity with the National Aqueduct would enable a uniquely convenient source of transmission and storage for the electricity they generate, that like other municipal placement, avoids the need to buy expensive land.

National Aqueduct pipelines integrated with solar panels and wind turbines

Wind can assist the National Aqueduct in both electricity transmission and thermoelectric battery functions. During peak demand, wind turbines integrated throughout the National Aqueduct could directly power regional areas, as the Aqueduct itself would effectively be a nationwide electric grid that could transmit electricity at high efficiencies. Conversely, the energy they generate could be diverted to water heating elements that keep the Aqueduct’s battery function at maximum capacity. As the Aqueduct is a “smart” system that operates within a modular, responsive framework, it would be able to respond to these needs intelligently, making wind integration yet another force multiplier to the National Aqueduct’s already multifaceted capabilities.

Internal hydroelectric power. As a part of the energy-generating capabilities of the National Aqueduct, the water pipes themselves could be fitted with internal turbines to generate electricity from the water flow. Hydroelectricity is highly effective as a power source, and by miniaturizing turbines within prefabricated pipeline arrays, nearly every aspect of the water transmission process can be harnessed as power.

A company named Lucid Energy in Oregon is already doing this today through modular turbine assemblies installed within prefabricated water pipes.[4]

Diagram of Lucid Energy hydrodynamic pipeline

Image source: Lucid Energy

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Overview of Lucid Energy Water Turbine:

Diagram of Lucid Energy hydrodynamic pipeline
Image source: Lucid Energy

Using a similar approach, the National Aqueduct would generate electricity 24 hours a day, 7 days a week by virtue of its primary function: transporting water over thousands of miles. Yet unlike other hydroelectric power stations, like the Hoover Dam on the rapidly-depleting Lake Meade,[5] this method is environmentally friendly and highly reliable.

Hydrothermal power. As water has one of the highest specific heats in nature, once it gets hot, it stays hot for a long time.[6] At the scale of billions of gallons, water stays hot for an extremely long time – days, even weeks – all the more so if the storage mediums are well-insulated.

One of the key functions of a CHP Plant is to keep water hot when it comes from a Multistage Flash Distillation Facility, and in turn pump it into the National Aqueduct hot. But as it travels over distance, the water will eventually cool.

To address this problem, we’ll need to rely on the National Aqueduct’s energy-generating features. By using the excess energy generated by pipeline-mounted solar arrays, wind turbines, and internal pipe turbines, we’ll have the energy necessary to keep water hot throughout the entire Aqueduct. This is beneficial for three important reasons:

First, water will reach its destination hot, sparing the energy needed to heat it within residential and commercial hot water heaters. By virtue of the Aqueduct’s control component, not all water would necessarily be delivered to residences at high temperature, but it can arrive hot at any given time. This gives municipal managers more flexibility in how they route water, as well as save significant sums of money and energy on heating costs.

Second, keeping the water hot prevents it from freezing in pipelines during winter months. Although the pipes would be insulated and resilient, a residual amount of heat could be constantly emitted to melt snow covering solar panels, allowing for electricity generation year-round.

Third, if the entire Aqueduct were heated, it would store a tremendous amount of potential energy that could be converted into electricity,[7] allowing it to functionally act as a battery – the world’s largest by far.

Several companies – such as Marlow Engineering’s models in the images below – make thermoelectric generators designed specifically to be placed over hot pipelines,[8] which can be placed in arrays up to three-wide. If installed throughout the entire system, they could generate immense power from such a large volume of hot water.[9]

Hot water pipeline thermocouples

Image source: Marlow Engineering

Let’s say, for example, that we’ll store 500 billion gallons throughout the National Aqueduct, and let’s say we heat that water to 200o F to maximize potential energy storage. Using the worksheets provided by the helpful folks over at Engineering Toolbox,[10] we'll conclude that 1 gallon of water at 200 oF contains 1,660 BTU of energy. Across 500 billion gallons, that comes to 830 trillion BTU, or 875.7 billion megajoules.

Converted into electricity, that's equivalent to 243 billion kilowatt-hours of potential energy from hot water alone.

Combined with the hydroelectric and solar functions of water pipeline arrays, it’s feasible for the National Aqueduct to store enough potential energy to generate trillions of kilowatt-hours over time. To put that in the proper scale, take another look at the nationwide road map we saw earlier:

Road networks of United States

If each one of these highway lines represented arrays of water transmission pipelines with solar functionality, hydroelectric functionality, and hydrothermal functionality, we’d be generating a level of energy that words don’t give justice to, particularly when combined with Liquid Fluoride Thorium Reactors, CHP Plants, and municipally integrated renewables. As adoption of Scarcity Zero's technologies spreads, the multiplier effect accelerates until we're well beyond the energy targets needed to support our way of life, with each step beyond that concordantly reaching a subsequent tier.

With the National Aqueduct implemented alongside integrated municipal renewables and CHP Plants, we have electricity, water, and fuel at our fingertips in indefinite abundance. That, once achieved, empowers us to evolve beyond the concepts of drought, water scarcity, and water-borne disease. And from there, we can do the same to famine.

Because as we can use effectively unlimited electricity to produce unlimited water and unlimited fuel, we can then use all three to produce unlimited food.