The system is reported to cut back the price of electrical energy in aquaculture. It consists of an open raceway pond, a mechanical paddle wheel, a motor and energy transmission system, a motor pace management circuit, a 100 W photovoltaic module, and a 12-V battery with a capability of 60 Ah, an inverter, and a ten -A cost controller.
Scientists from Germany’s Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE) and the Tarbiat Modares University (TMU) in Iran designed a PV system for microalgae and co-production of electrical energy.
They defined that aquaculture services have sometimes excessive electrical energy prices that account for about 40% of their whole vitality prices, with about 0.5% of world GHG emissions attributable to aquaculture. “Cultivation of microalgae in open pond methods, when mixed with PV expertise, can enhance vitality effectivity, and cut back water evaporation, additional adapting aquaculture practices to mitigation targets within the local weather,” they emphasised.
The analysis workforce describes the proposed expertise as a “small aquavoltaic” system consisting of an open raceway pond, a mechanical paddle wheel, a motor and energy transmission system, a motor pace management circuit , a 100 W photovoltaic module, and a 12-V battery. with a capability of 60 Ah, an inverter, and a 10-A cost controller.
The key ingredient of the system, the polyethylene raceway pond, was conceived with an open design to permit entry to daylight and air. Typically, these ponds have a shallow design to cut back evaporation and contamination, in addition to to favor steady water circulation.
Academics set the optimum water depth for the manufacturing of microalgae within the pond at 0.3 m. “By controlling this particular water depth together with different parameters resembling rotation pace and response time, it’s potential to create favorable circumstances for the manufacturing of microalgae and the era of electrical energy within the aquavoltaic system,” added they defined.
The efficiency of the system was assessed via a collection of experimental assessments performed from May 9 to May 15, underneath completely different climate circumstances. The primary parameters are photo voltaic radiation, air temperature, and wind pace.
The evaluation exhibits that the shading attributable to the photo voltaic panel has a “vital” impact on the management of the temperature and pH vary of the microalgae manufacturing pond. The module, nonetheless, was capable of cowl roughly 98.6% of the annual electrical energy demand of the aquaculture facility.
The workforce additionally performed a techno-economic evaluation of the system that hosts the cultivation of Spirulina, blue-green algae that comprise nutritional vitamins, minerals, antioxidants, and proteins, and located that it achieved 7% decrease electrical energy prices in comparison with a reference system powered by grid electrical energy.
“The value of Spirulina produced utilizing an aquavoltaic system within the fifth 12 months was calculated at $0.4975/g at a %5 rate of interest and $0.331/g at a %10 rate of interest,” the scientists emphasised. “Furthermore, the associated fee per liter of Spirulina produced utilizing the aquavoltaic system was calculated at $0.7133/g.”
System particulars will be discovered within the paper “Development and experimental efficiency analysis of a small aquavoltaic system for microalgae manufacturing,” revealed in Engineering Results. “The present examine highlights that aquavoltaics might have the potential to additional improve the manufacturing of microalgae and thus cut back manufacturing prices,” the researchers concluded.
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