FIELD: fishery, in particular, increasing of vegetation period for growing of fish and other objects of fresh-water aquaculture in one or two fishery zones.
SUBSTANCE: apparatus has heat accumulator using solar heat and having outer light transmitting surface, heat absorbing surface and device for transfer of heat into water mass. Heat accumulator is made in the form of chamber filled with heat-accumulating material. Outer surface of said chamber is made from selective glass. Heat-absorbing surface is made in the form of collector covered with black opaque paint and dipped into heat-accumulating material. Device for transfer of heat into water mass is formed from heat tubes which are built with their one ends into lower part of said chamber.
EFFECT: increased efficiency in water heating within fish tank, more uniform spreading of heat in water mass, and reduced power consumption.
8 cl, 3 dwg
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