Objective
The aim is to heat sea water by a sun powered thermal station, in order to cover the mayor part of the needs of a marine fish hatchery, principally at the larval stage. In this way , the actual consumption of conventional combustibles (diesel oil and propane) would be notable reduced.
The results is very encouraging, because the sun energy inlets are bigger at the beginning and at the end of the period, and the heating recovery is bigger in the middle of the period, due to the thermal jump that has to be covered. With all of this, savings on diesel oil for the year can be around 20000 litres/year, which means a very important reduction in the production cost.
The existing installation has two diesel oil boilers with a unitary power of 260000 Kcal/H, which are fed by twin deposits of 15000 litres of capacity each. This system heats fresh water up to 80-90°C which is used afterwards to raise the sea water temperature using a heat exchanger of titanium plates, becauses this material behaves very well against rust produced by sea water.
We start to use it at the beginning of October, that is when in this area of the Cantabrian Sea the water temperature goes under 16°C. From that moment on, and in order to avoid mass mortalities in seabream, seabass and turbot larvae, we start heating about 50000 litres/hour of filtered sea water up to 21-23°C. Before delivery to the tanks of the larval units the water is mixed with filtered water at ambient temperature, so we can have the right temperature required by each specie.
The situation continues until the end of June, and after that moment, due to the sea water T° recovery, we stop using the installation. By that time, the diesel oil consumption has gone up to 275000 litres, to what we have to add the propane consumption which is minor, but it could also be reduced.
The objective pursued is to reduce notable the dependence on oil derivatives combustibles (specially diesel oil), to lower significantly the CO2 emissions, at the same time that we obtain important economic savings.
For all the above, the idea of working with a hybrid system has been developed, based in the production of energy by a sun powered thermal station, which will be supplemented by the actual installation of the boilers, which cover part of the night need and also supplement the station when radiation is not high enough. All of this is complemented by a heating recovery unit, which is made recovering the water from the fish tanks water outlets and pumping it through another heat exchanger of titanium plates in charge of heating sea water, reducing in this way the energy effort necessary afterwards.
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Programme(s)
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Topic(s)
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
Spain
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.