Heat pump hot water system based on fractal phase change energy accumulator

Abstract

The invention discloses a heat pump hot water system based on a fractal phase change energy storage device. The heat pump hot water system comprises a heat pump unit, a fractal phase change energy storage device, a water pump, an electric heater, a sensor, valves and other main components. The heat pump unit, the fractal phase change energy storage device, the water pump, the electric heater and the valves are sequentially connected through pipelines according to the figure 1. Opening and closing of the valve are controlled through a temperature sensor and a flow sensor, so that operation modes are switched. The operation modes of the heat pump hot water system comprise a heat pump unit independent heating mode, an energy storage device independent heat storage mode, an energy storage device independent heat release mode, a heat pump unit heating and energy storage device heat storage mode and a heat pump unit heating and energy storage device heat release mode. According to the heat pump hot water system, the phase change material is adopted as an energy storage medium, the operation stability and the heating efficiency of the system can be improved, and the cold water bypass pipeline is additionally arranged, so that heat storage and heat release integration of the fractal phase change energy storage device can be achieved under the condition that the system operates under a single working condition. The fractal phase change energy storage device has the advantages of being small in size, large in energy storage density, rapid in heat storage and release and constant in water supply temperature.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage and heat pump hot water systems, in particular to a fractal phase change energy storage device, a heat pump hot water system and a control method thereof. Background technique [0002] The traditional heat pump hot water system is generally equipped with a large volume of hot water storage tank to meet the user's water demand during peak water consumption; while the fractal phase change energy storage can achieve the same heat storage in a smaller volume to meet the user's needs; In the heated heat pump hot water system, the temperature of the water in the hot water storage tank increases with the continuous heating, resulting in higher and higher inlet water temperature of the heat pump unit, and the heating efficiency of the heat pump unit is also lower and lower; The phase-change heat storage energy of the phase-change accumulator keeps the inlet water temperature of the hea...

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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art above, the present invention provides a heat pump hot water system with fractal phase change accumulator to solve the problem that the volume of the hot water storage tank in the traditional heat pump hot water system is too large. The resulting high water temperature of the heat pump unit reduces the heating efficiency of the heat pump unit;

[0005] Solve the problem of slow heat storage and discharge rate in traditional phase change heat storage systems; also solve the problem that traditional energy storage systems require dual-working condition units to achieve simultaneous heat storage and heat supply;

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