Nanometer phase change energy-storage-type heat pump water heater

Abstract

The invention discloses a nanometer phase change energy-storage-type heat pump water heater. The heat pump water heater comprises a phase change energy storage box, wherein a condensation heat exchange coil pipe and a waterway heat exchange coil pipe are mounted in the phase change energy storage box; an expansion valve, an evaporimeter and a compressor are connected in a condensation heat exchange coil pipe loop in sequence; the phase change energy storage box is filled with a nanometer phase change energy storage material of which the phase change temperature is 50 to 60 DEG C; the nanometer phase change energy storage material comprises the following components in parts by weight: 0.5 to 2.0 parts of nano-particles, 0.9 to 3.6 parts of a dispersant, 94.4 to 98.6 parts of a phase change working medium. The potential heat value of the phase change material is large, and lots of heat can be absorbed in a phase change process, so that the heat conductivity coefficient of the phase change material is high, the heat transfer coefficient of the phase change energy storage box is improved, the time for thermal reaction is shortened, the efficiency is higher, and the energy conservation can be achieved better; thus, the heat pump water heater provided by the invention can be applied to the production and life field to realize that electric energy can be utilized to generate and store the heat during a low electricity demand period and release the heat during a high electricity demand period. Thus, the mismatch of two sides of energy supplying and energy demanding on time, strength and place is effectively released and solved, so that the aim that energy can be utilized reasonably and environmental pollution can be relieved is achieved.

Description

technical field [0001] The invention relates to a heat pump water heater with a nanometer phase-change energy storage working medium, and belongs to the technical field of heat exchange. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for the safety performance and environmental protection of water heaters. In hotels, restaurants, swimming pools and other places, the demand for hot water is very large. At present, most of the heating methods such as fuel oil, gas or even coal are used to produce hot water, which has caused huge pollution and damage to the environment and caused serious damage to the survival of human beings. threat. In addition, the current situation of electricity in my country is very urgent. At present, it has entered a state of continuous power shortage throughout the year. Most provinces and cities have implemented power cuts. Therefore, it is very necessary to develop new energy-saving...

AI Technical Summary

Problems solved by technology

The thermal conductivity of flake nanographite is 160 W / m K, which leads to low heat transfer coefficient and long thermal reaction time of the phase change energy storage box, especially, the phase transition temperature of this nano phase change energy storage material is 45 -90°C, poor stability of phase change materials

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