Cooling, heating and power combined supply system and method with domestic hot water waste heat recovery function

Abstract

The invention discloses a cooling, heating and power combined supply system and method with a domestic hot water waste heat recovery function. Waste heat of domestic sewage of the user side is recovered, gradient utilization of energy is achieved, and energy waste is reduced. The system comprises an internal combustion generator set, an absorption refrigeration unit, an electric refrigerator, a cylinder sleeve water heat exchanger and a domestic hot water waste heat recovery device; the electric energy output end of the internal combustion generator set is connected into a distribution networkthrough a grid connection control cabinet, and the flue gas output end of the internal combustion generator set is connected to the absorption refrigeration unit; the cylinder sleeve water output endof the internal combustion generator set is connected to the primary sides of the absorption refrigeration unit and the cylinder sleeve water heat exchanger; the electric refrigerator and the absorption refrigeration unit separately generate air conditioning water which is input into an air conditioning water pipeline on the user side; and the cylinder sleeve water heat exchanger uses residual heat of cylinder sleeve water to prepare domestic hot water, and the domestic hot water waste heat recovery device recovers energy in domestic waste water, and the domestic hot water is input into a domestic hot water pipe.

Description

technical field [0001] The disclosure belongs to the field of distributed energy, and in particular relates to a combined cooling, heating and power supply system and method including domestic hot water waste heat recovery. Background technique [0002] The combined cooling, heating and power system is an energy supply system based on the concept of energy cascade utilization. The three processes of water) meet the user's cooling, heating, and electricity needs on the spot, thereby reducing the transmission loss of long-distance energy supply, greatly improving social and economic benefits and energy utilization efficiency, and playing a role in reducing fossil energy consumption and carbon emissions. important role. [0003] The cascade utilization of energy is the core concept of the combined cooling, heating and power system. In the existing system, the high-temperature heat energy from primary energy combustion is first used for power generation, and the waste heat from...

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Problems solved by technology

However, the domestic sewage on the user side of the above patents is still directly discharged, and the sewage used comes from the main sewage canal (domestic wastewater, industrial wastewater), rather than the domestic hot water sewage produced by the system itself for use on the user side, which not only causes a large amount of Waste of energy, and the temperature of the sewage used is low, resulting in low efficiency of the sewage source heat pump and poor heat recovery efficiency

[0005] To sum up, at present, there is still a lack of effective solutions to the problem of how to recover the heat in the sewage water after the use of domestic hot water on the user side and improve the efficiency of heat recovery

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