An aquavoltaic system and an aquavoltaic method applied to the aquavoltaic system are provided. The aquavoltaic system comprises a fish pool, a photovoltaic power generation assembly, and a power storage assembly; a power-consuming device comprises a detection unit, a water quality regulating unit and a power regulator that are arranged in the fish pool; and an electric energy output end of the photovoltaic power generation assembly is connected to an electric energy input end of the power-consuming device via a first circuit, the electric energy output end of the photovoltaic power generation assembly is connected to an electric energy input end of the power storage assembly via a third circuit, the electric energy input end of the power-consuming device is connected to an electric energy output end of the power storage assembly via a fifth circuit, and a fifth switch is arranged on the third circuit.

An aquaponics and greenhouse system, includes an insulated solar greenhouse with a glazing on a sun facing side at an angle to maximize winter sunlight, and housing a fish tank housed within the solar greenhouse; a plant growing area housed within the solar greenhouse; a mushroom growing area housed within the solar greenhouse; a water wall thermal mass housed within the solar greenhouse and disposed between the plant growing area and mushroom growing area; and a natural air ventilation system housed within the solar greenhouse and configured to provide misted air into the mushroom growing area. O2 generated by the plant growing area is received by the natural air ventilation system and provided to the mushroom growing area, and CO2 generated by the mushroom growing area is provided to the plant growing area.

Modular habitat structure (MHS) which can accommodate one or more live inhabitants is comprised of a rigid pillar which extends linearly away from a base end toward an upper end. A plurality of major system components are disposed at different locations along a length of the rigid pillar. Each of the major system components is comprised of modular segments which individually extend circumferentially around at least a portion of the rigid pillar. The modular configuration of the segments allows user configuration of the MHS by selectively adding or removing one or more segments of each of the major system components.

A fluid-dynamic pump which is suitable for circulating water in an aquarium includes a rotary device, an electric motor configured to move the rotary device, a pump body which houses a printed circuit board which that controls the electric motor and a temperature sensor that detects the temperature of the water of the aquarium. The temperature sensor is positioned on the pump body.

An array system of passive solar aquaponic and mushroom production structures, each having a glazing on a sun facing side to maximize winter sunlight; a plant growing area; a mushroom growing area; a water wall thermal mass integrated and disposed between the plant and mushroom growing areas; a fish tank; a saltwater basin under the plant growing holding saltwater; a natural air ventilation system providing misted air to the mushroom growing area and receiving O2 from the plant growing provided to the mushroom growing area, and CO2 generated by the mushroom growing area provided to the plant growing area; and saltwater channels delivering saltwater to the saltwater basins from a saltwater source, and which is evaporated by solar heat generated by the plant growing areas in order to generate freshwater.

An aquaculture system can include stacked growth trays. Animals, such as shrimp, can be transferred between the growth trays for different stages of growth. Waste water can be removed from the growth trays and can be processed by a water treatment system. Treated water can be returned to the growth trays. A valve in a first configuration can permit water to circulate through the growth tray, while impeding the animals from exiting the growth tray. In a second configuration, the valve can permit the animals to exit the growth tray, such as for transition to a subsequent growth tray. A sweeper system can be used for cleaning and/or mixing the water in the growth tray, and/or for pushing the animals out of the growth tray during a transition.

A peltier device comprises peltier elements specified in cooling or heating temperature, a heating heat sink connected in contact on one side surface of the peltier element, a chilling heat sink connected in contact on the other side surface of the peltier element, and a cooling fan. Using peltier elements each of which is specified in a cooling or a heating activity, a heat exchange efficiency is enhanced thank to a plurality of functions of a single peltier element; thermal radiation is separated by bringing the peltier element into contact with a heating heat sink and a cooling heat sink independently from each other; the surface area in contact with the fluid is maximized through the X shaped aperture formed with four wings protruding from the inner surface of the aperture towards the center part, directly transferring the endothermic and exothermic effects from the Peltier element to the fluid.

Disclosed are livewell systems and methods of operating livewell systems. A livewell system may include a livewell tank having a chamber formed therein, a fill sensor configured to detect a fill level of the chamber, an intake pump configured to selectively convey water into the chamber, and a control unit including a processor and a memory storing instructions. The processor may be configured to execute the instructions to receive a fill signal, determine whether the chamber is filled to a predetermined fill level; and in response to the fill signal and a determination that the chamber is not filled to the predetermined fill level, cause the intake pump to convey water into the chamber.

A flat heater includes a housing including an accommodating groove formed inside the housing; a circuit unit disposed within the housing to control the heater, wherein the circuit unit includes a circuit board and a first rectifier disposed on the circuit board; a heating module disposed in the accommodating groove and electrically connected to the circuit unit, wherein the heating module includes a plurality of heating pipes and a plurality of second rectifiers disposed in each of the heating pipes; an upper cover assembled to a top surface of the housing and comprising a long side and a short side, wherein a plurality of fluid-permeable holes are formed on the upper cover; and a suction member inserted into the through hole and attached to an object and thereby fixing the housing to the object.

A structure of an aquarium heater with off-water overheat protection, wherein a control box with a control circuit is set inside. The control circuit includes: setting a temperature-control module; connecting with an electric heater; and connecting with either an overheat sensor or an off-water protection sensor; wherein the control circuit consists of a single chip, an electric relay box, and a plurality of resistors, capacitors, diodes, and transistors to constitute a complete electric circuit. Therefore, saving the electric energy and avoiding the conditions which the heating temperature is too high or the electric heater is emptily burned to damage because of the off-water can be achieved through the overheat sensor senses the temperature or the off-water protection sensor senses weather the electric heater is off water or not, and then the temperature-control module does the temperature comparison to control the electric heater to heat or not.