Extracting system of thermal energy of water of rivers, lakes and seas below the ice surface

Abstract

A heat extractor of the water under ice comprises serially connected heat collector, heat boost and heat radiator, and at least two parallel middle heat exchangers between the heat collector and heat booster, wherein, each middle heat exchanger is formed by shared heat exchange pump, shared energy output coil tube, and parallel connected valves and energy input coil tubes to form a circuit which contains cold-proof liquid; the energy input coil tube of each middle heat exchanger is coupled to relative parallel connected heat exchange coil tube; the shared energy output coil tube is coupled to the evaporator. The invention uses valve to control the middle heat exchangers work serially, to extract heat from the water around 0Deg. C.

Description

Technical field [0001] The invention relates to a thermal energy extraction system, in particular to a thermal energy extraction system for rivers, lakes and seawater under ice. Background technique [0002] Low-grade thermal energy is extracted from the water of rivers, lakes and seas, and upgraded to high-grade thermal energy by heat pumps, which can provide heating for buildings in winter. This is a good energy-saving and environmentally friendly energy source. However, due to the cold winter in the northern region, the surface of rivers, lakes and seas will be covered by ice, and the water under the ice is close to zero. When using close to zero water as low-level heat energy, the heat exchange coil coupled with the evaporator of the heat pump is used. It will freeze, so this environmentally friendly energy cannot be used well. Such as figure 1 The thermal energy extraction system shown includes a thermal energy harvesting device 1, a thermal energy lifting device 13 and a h...

AI Technical Summary

Problems solved by technology

like figure 1 The thermal energy extraction system shown includes a thermal energy collection device 1, a thermal energy lifting device 13, and a heat dissipation device 12 connected in series in sequence. The circuit formed by the thermal coil 3, the thermal energy raising device 13 comprises a circuit composed of an evaporator 7, a compressor 8, a condenser 9 and an expansion valve 14 connected in series in sequence, and the heat dissipation device 12 comprises a heat dissipation heat exchange coil 10, an energy output The circuit composed of the pump 11 and the radiator is provided with a refrigerant in the circuit of the heat energy raising device 13, and in the circuit of the heat energy harvesting device 1, what flows in the circuit of the heat energy harvesting device 1 is seawater from rivers and lakes close to zero, and after releasing heat in the condenser 9 The refrigerant drops to about minus 5°C after passing through the expansion valve 14, and rises to about 0°C after passing through the evaporator 7, while the water in the heat collection and heat exchange coil 3 coupled with the evaporator 7 gradually releases heat. freezes, making the whole system inoperable

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