We hired an elite master’s Engineer (now a shareholder) to help study OTEC and heat exchange. With his help we were able to make detailed observations about the likely cost of an OTEC unit. With the use of an Ammonia saturation table and a spread sheet we were able to create a simple but accurate picture of the physical requirements of the OTEC unit. We can also calculate losses due to friction and the temperature of the wastewater. We know how much energy will be used for pumping. We can know the width of the heat exchanger even with several different but important variables.
With the use of software, we could see the pitfalls and the advantages of various arrangements. For example, placing tubes closer together increases the heat transfer coefficient but it takes more energy from the system; as a result, less energy can be sold per unit. Increasing the distance between tubes lowers the amount of energy taken but increases the number of tubes required and the width of the heat exchanger.
As for water delivery, narrowing the delivery hose can massively increase the amount of energy taken by friction on the walls of the hose. Increasing the diameter can massively reduce the amount of energy taken; on scales that are relevant to SWAC and OTEC, increasing the diameter of a hose by just 10 cm can greatly reduce the amount of energy taken.
As we remain something of a diamond in the rough, we are offering a 30 % discount to our first customer. We aim to work closely with them in order to install firstly a hose system, secondly a SWAC system and thirdly an OTEC system. Doing so means that we can be sure of each stage before moving onto the next. Each of these steps grants the end user the opportunity to generate income, so electric power aside for a second, each step is worthwhile.
One possible middle step between SWAC and OTEC would be to run the OTEC system with an automobile turbo-compressor, these cost as little as £30 on eBay and are not limited in size unlike turbo-generators. Turbo-compressors can spin at 60,000+ rpm. Typically, it is not possible to find a motor-generator under 180 kw that is able to spin at the speed required to generate power with OTEC.
Compressing gas with a deep-sea-cold water heat engine is a system that we have applied for a patent for. This might just be the missing link when it comes to the hydrogen economy as cooling power and compression means ‘zero-electricity’ compression and cooling of Hydrogen and all the way into a liquid state which is a highly efficient medium in terms of transport cost. (And the tank can’t explode.)
We find that your site is now a green energy oil well that can export meaningful quantities of hydrogen and not just a lucky site that can produce some power for local use.