Abstract

An analysis of present heat production systems, using fossil fuel combustion, employed for sea water heating in Spanish hatcheries is given in this paper and compared to a technical solution based on the employment of a heat pump. Price per unit of produced energy is calculated for each system using liquid and gaseous fuels, and then these prices are compared to the price obtained for a heat pump. The heat pump system is also compared, from the point of view of its precision in maintaining temperatures, to the systems used at the present. A project prototype for thermal conditioning and temperature control in aquaculture rearing tanks is described. The waste heat of the return water is recovered: first, by a static recoverer and second, by a recoverer connected to the evaporator of a refrigeration unit. The system should be used in such a way that economic benefits are obtained from its two heat sources of the frigorific system in simultaneous production of warm and chilled sea water.

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