About us - REsystems Ltd.

The Company was founded based on the assumption that a lower cost method of raising deep-sea-cold-water would be of interest to investors and energy users. REsystems Ltd. are proprietors of intellectual property that describes novel methods of delivering deep-sea-cold-water for use in industry. We were granted several patents over the course of the last decade, and these are still in force.

Since then, we have been through several cycles of evolution where passion and ignorance were replaced with knowledge and professional ability. The founder became an expert at fields he had known nothing about. This was thanks to a professor who is now a shareholder, a master’s engineer in thermodynamics who is also now a shareholder, and the work of Dr Luis Vega et al and Professor Salter et al.

Much to our surprise we found that OTEC heat exchangers are affordable, and so too are all aspects of OTEC power generation. We found that all aspects of OTEC engineering were highly established fields of expertise where all the answers to the problems already exist. All the technology can come off the shelf and is either Technology Readiness Level (TRL) 8 or 9.  The highest level being nine.

Thankfully, the turbo-pump and hose method remains an attractive solution to deep-sea-cold-water delivery and further innovations have meant that the potential market is now genuinely large and can certainly produce cost effective energy on continental scales and within the locality of large, developed population centres like Los Angeles, and the French and Italian Riviera.

REsystems Ltd. is a burgeoning start-up. We are looking for sites that can use the technology and are making connections with related business. We are now ready to sell NEW-OTEC products to private end users or developers, or to do business as an independent power producer.  Subsidiaries are planned for each avenue and these are open to investors, as is the IP holding company.

Our message to anyone considering the technology is ‘Do not be afraid of it, it is common technology, it is not new, the potential financial gain from using the equipment should justify research of your own into the physics behind the technology and we can help you do this by offering you use of our software which can jump-start your research so that you can corroborate the findings elsewhere in ’24 hours’.  The jump from TRL 8 to 9 is a modest one, and so sites who stand to gain should be looking to take advantage.

Sea-water-air-conditioning is incredibly powerful at cooling and is persistently overlooked as a source of energy economy because of the attraction to the glory of renewable 24-7 electricity. SWAC has none of the problems of OTEC and is potentially worth far more for far less than OTEC to the user at the site.

SWAC can be used as a steppingstone to OTEC, and availability of additional heat could mean that hose diameters do not need to increase. Recent research suggests that there is now a plethora of small-scale turbogenerators on the market that are perfectly suited to OTEC and the organic Rankine cycle; small scale OTEC, even genuinely small scale OTEC, (Less than 20kw) may be well be viable and affordable for the right niche end user now.

Co2 sequestration and ocean fertilisation installations can be used as a steppingstone to SWAC and OTEC; sites with a Co2 installation can use the same water for OTEC and SWAC.

Suitability of Deep-sea-cold-water for energy use at your site is special and so use of this technology can be regarded as an investment beyond the value of the energy.  We are at a stage now where an end user can be an investor too and can stand to gain even more from successful development of the technology than the gain in value at a particular site.’

Frequently asked questions about us, heat engines, and traditional OTEC.

OTEC is organic Rankine cycle with sea water as a renewable heat source, why isn’t it developed already?

Of course, for some people OTEC is obviously viable this is just organic Rankine cycle (ORC) with very low-grade heat, and this is where the controversy begins; does very low-grade heat work in ORC. or not? OTEC is doubted for this reason, and equipment costs are high enough to have stalled private development of OTEC.

Can’t you add more heat?

There is one simple fix can be applied and that is to use additional heat, and this can be done by simply adding an additional heat exchanger.  With the use of the additional heat exchanger the grade of heat can match that of an untold number of sites where ORC. is working and the exact same ‘bankable’ machine can be purchased.  Problem solved!

Doesn’t this make the use of sea water pointless?

This does NOT make the use of seawater pointless, far from it.  It is the phase change from gas to liquid and liquid to gas that takes allot of energy and this happens at around 12 degrees. This energy cannot be recovered in the form of electricity, it is entirely ‘wasted’ / rejected. This is a fundamental of heat engine design.

The quantity of energy required to change the state from gas to liquid and liquid to gas is quite large.  Much greater than the power can be produced by natural sea water temperatures, there is a ratio of about sixty waste heat to one net power produced at sites near the edge of the tropics like the Bahamas. This is the controversy of OTEC and why there are expense problems.

Unlike traditional OTEC some power plants continue to heat the working fluid by hundreds of degrees, and this is how old-fashioned technology was so cost effective, because for the very most part all this heat can be converted to electrical power. Amazingly, there is nothing to stop an OTEC system from doing the same if extra heat is added.

How much heat must be added for what benefit?

In a traditional OTEC ORC system, the working fluid phase change happens at around 12 degrees. Once boiled, the working fluid is now a gas and can begin to gain in temperature and pressure. This gain in temperature and pressure is what can be converted into electricity. Under 20 degrees and the system is not economically viable, this is equivalent to Subtropical. Once over about 23 degrees the system becomes worthwhile economically, this is Equivalent to just inside the tropics.

However,  if you can get up to around 30 degrees, equivalent to the Equator, the user will already have doubled the net power to capital cost ratio when compared with sites just on the inside of the Tropics.

Now you can imagine how much cheaper a system could be if it can get up to 100 degrees.

Can you add as much heat as you like?

The system can go on to add as much heat as is reasonable using traditional heat transfer methods just as traditional power plants do.  Therefore, NEW-OTEC plants can use the same equipment and have the same economy as traditional ORC plants, and traditional dirty power plants.

Does this mean that a NEW-OTEC plant can be the best way to produce power from any heat source? 

It certainly looks like it.

Use of NEW-OTEC even with dirty fuels is a better way of creating power. Not only is the technology viable, but the ‘fuel economy’ of any heat source has also improved.



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