Slide One

Innovative projects

GHy­GA devel­ops green ener­gy projects by bring­ing in new ideas.

» Our solu­tions » Inno­v­a­tive projects

Innovative projects
that “boost” the energy transition

Energy transition with GHyGA innovations

The energy transition with the exploitation of marine renewable energies

The term “marine ener­gy” (also “tha­las­so-ener­gy”) is used to refer to all forms of exploita­tion of renew­able resources from the marine envi­ron­ment: tides, cur­rents, waves, heat, salin­i­ty, bio­mass and wind.

More than 70% of the plan­et is cov­ered by oceans and seas, which con­tain enor­mous quan­ti­ties of ener­gy flows linked to atmos­pher­ic ener­gy and grav­i­ta­tion­al vari­a­tion. It is inter­est­ing to try to exploit them in a more sys­tem­at­ic way by con­ven­tion­al means adapt­ed to the off­shore con­fig­u­ra­tion, with eco­nom­ic optimisation.

How does GHyGA propose to harness marine energy for the production of Hydrogen and Ammonia?

The simul­ta­ne­ous use of wind and ocean cur­rents allows the inter­mit­tence of both ener­gy sources to be smoothed out and up to 70% of the installed pow­er to be har­vest­ed. Con­ven­tion­al bat­ter­ies can be used to store short-term pro­duc­tion peaks and sta­bilise the out­put of the electrolysers.

Marine cur­rents in the Chan­nel, North Sea and North Atlantic (France, Eng­land, Scot­land and Ire­land) rep­re­sent a pow­er source of around 5 GW.

The trans­for­ma­tion of their kinet­ic ener­gy into elec­tri­cal ener­gy is based on var­i­ous tech­nolo­gies; the most advanced is the hor­i­zon­tal tidal tur­bine, which GHy­GA wish­es to apply in the short term to its marine cur­rent projects.

Putting circular industry into practice

Cir­cu­lar indus­try is a term for an eco­nom­ic mod­el based on resource sus­tain­abil­i­ty, life exten­sion and regen­er­a­tion of prod­ucts and mate­ri­als. Thus, the cir­cu­lar indus­try is much more com­pre­hen­sive than just recy­cling. GHy­GA applies this eco­nom­ic mod­el to its MRE projects through opti­mised resource man­age­ment and the choice of effi­cient technologies.

How does GHyGA use this business model?

The pro­cess­ing and upcy­cling of for­mer decom­mis­sioned oil&gas drilling plat­forms for the 2W2H2® and 2W2NH3® projects involves the recov­ery and reuse of 17,500 to 25,000 tonnes of steel per project. A fur­ther 25 years of oper­a­tion of such plat­forms is pos­si­ble at low­er cost for off­shore gH2 and gNH3 pro­duc­tion plants.

In the North Sea (Scot­land) there are many “cold stacked” plat­forms await­ing decom­mis­sion­ing, most of which can be upcy­cled for new ser­vices to sup­port off­shore H2 and NH3 Green Gas production.

Innovative optimisations on our projects for the energy transition

Con­tin­u­ous tech­no­log­i­cal progress makes Green Hydro­gen (gH2) com­pet­i­tive before the year 2030. Its large-scale use will depend, among oth­er things, on restric­tive mea­sures for the use of fos­sil fuels. The use of Green Ammo­nia (or gNH3) in ther­mal engines and gas tur­bines is immi­nent and can also be applied in series as ear­ly as the 2030s.

The ener­gy tran­si­tion with Green Hydro­gen and Green Ammo­nia is under­way and GHy­GA’s 2W2H2® and 2W2NH3® projects are being devel­oped and opti­mised to meet the indus­tri­al needs of the next decade.

Some exam­ples of optimisations:

Concentration of the means of production

Bring­ing pro­duc­tion and stor­age equip­ment and process­es togeth­er on the plat­form facil­i­tates inter­faces, reduces ener­gy con­sump­tion and low­ers the lev­el of investment.

Remote con­trol of oper­a­tions is eas­i­er. Plat­form oper­a­tions avoid many of the envi­ron­men­tal and soci­etal prob­lems asso­ci­at­ed with a land-based location.

Optimisation of applied technologies

The evo­lu­tion of tech­nolo­gies for pro­duc­ing gH2 and gNH3 is very dynam­ic. GHy­GA fol­lows this evo­lu­tion and choos­es the best per­form­ing solu­tions, at the high­est lev­el of matu­ri­ty — with a TRL (Tech­nol­o­gy Readi­ness Lev­el) >8 — with the best yields and at the low­est cost.

GHy­GA mon­i­tors the avail­abil­i­ty of the most crit­i­cal ele­ments, which are still in progress for this improve­ment in effi­cien­cy, such as the tidal tur­bines, the elec­tric pow­er gen­er­a­tors, the mem­branes and elec­trodes of the elec­trol­y­sers and the ener­gy con­sump­tion of the lat­ter (Stacks + “Bal­ance Of Plant”).

Storage and transport

Hydro­gen must be com­pressed to high gas pres­sure lev­els or con­densed to liq­uid form, to reduce its stor­age vol­ume. GHy­GA wish­es to use two meth­ods:

  • High pres­sure gas phase com­pres­sion in steel cylin­ders (type II), ver­ti­cal­ly arranged in 20′ con­tain­ers (e.g. >@500 bars).
  • Absorp­tion in the liq­uid phase by LOHC (Liq­uid Organ­ic Hydro­gen Car­ri­er) tech­nol­o­gy, which com­bines the advan­tages of absorb­ing large quan­ti­ties of Hydro­gen and stor­ing it in liq­uid form (facil­i­tat­ing trans­fer and trans­port oper­a­tions) while elim­i­nat­ing the risks of igni­tion and explo­sion (safe­ty).

Port energy

NH3 can become the ide­al (effi­cient and clean) fuel for com­mer­cial ships, either by use in a sol­id oxide fuel cell or by retro­fitting exist­ing ther­mal engines.

Sim­i­lar­ly, port facil­i­ties can rapid­ly oper­ate on gNH3-based ener­gy. The link between off­shore NH3 pro­duc­tion and its sup­ply for use by the ship­ping indus­try is a major asset for the 2W2HN3 project®.

More infor­ma­tion on our Hydro­gen Pro­duc­tion Plat­form project
(2W2H2 project®)

More infor­ma­tion on our Ammo­nia pro­duc­tion plat­form project
(Project 2W2NH3®)


For more infor­ma­tion about Ghy­GA, con­tact us:

1800 route des Eymards
26260 Margès ‐ France



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