A high-efficiency hot water storage tank using layered phase change materials and its design method

Abstract

The invention discloses a phase-change-material-layered-utilization efficient heat-storage water tank and a design method thereof. The water tank is sequentially composed of a water tank liner, different-temperature-phase-change-material layers, a heat insulation layer, a water inlet, a water outlet and a pollution discharging opening from inside to outside. The phase-change materials are arranged between the water tank liner and the heat insulation layer in a layered mode, and the heat storage capacity and the heat insulation capacity of the water tank are improved through the poor energy storage performance and the poor heat-conducting performance of the phase-change materials. Every temperature difference of 3 DEG C in the perpendicular direction in the water tank is used as an interval, and the center temperature of the area is taken as a reference to select the temperature of the phase-change materials. According to the phase-change-material-layered-utilization efficient heat-storage water tank and the design method thereof, under the condition that the water storage volume of the water tank is not additionally occupied, efficient using of the phase-change materials is achieved, the heat insulation function of the heat storage water tank is improved in a certain degree, and the requirements of domestic hot water of users at different times are met.

Description

technical field [0001] The invention relates to the field of hot water storage tanks, in particular to a high-efficiency hot water storage tank using layered phase change materials and a design method thereof. Background technique [0002] Solar water heaters have become a common commodity in people's home life, and are more and more favored by consumers because of their safety, energy saving and environmental protection. The heat preservation of the traditional solar water heater storage tank is to fill a thick layer of polyurethane material between the inner tank and the outer shell, and use the poor thermal conductivity of the polyurethane material to block the outward transfer of heat; there are also products in the polyurethane material and outer shell, A layer of heat reflective film is pasted between the inner tanks to reduce heat dissipation. Due to the general heat insulation effect of polyurethane materials and basically no heat storage capacity and other shortcom...

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Problems solved by technology

[0003] The purpose of the invention is to solve the problem of poor thermal insulation effect of the existing solar water heater water storage tank, to provide a high-efficiency hot water storage tank using phase change materials in layers and its design method, which can make all the phase change materials in the water tank complete phase change. In the real sense, it can simultaneously play the effect of energy storage and heat preservation, so as to improve the overall heat preservation effect of the water tank

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