Heat capacity increasing device of heat storage tank

Abstract

The invention provides a heat capacity increasing device of a heat storage tank. The heat capacity increasing device comprises a shell and phase change heat storage material in the shell. The device has the same density as water which temperature is the same as the phase change heat storage material in the device. When the density of the phase change heat storage material is lower than the density of the water, the interior of the shell is provided with an assistant heat transmission structure which density is greater than the density of the water; when the density of the phase change heat storage material is greater than the density of the water, gas is sealed inside the shell. According to the device, the stratifying and supercooling of crystalline salt hydrate phase change material can be avoided. The heat transmission property of the device is equal or greater than the heat transmission of the water, so that a heat transmission mechanism does not need to be added in the tank for the phase change material. Furthermore, according to requirement, the device can increase the same volume of the heat storage capacity of the heat storage tank to achieve the effect of increasing the heat storage capacity.

Description

technical field [0001] The invention relates to heat storage technology, in particular to a heat capacity increasing device for a hot water storage tank. Background technique [0002] The hot water storage tank is an important energy storage tool that stores excess heat in the water tank when there is excess energy, and releases it when there is a lack of heat. It is mostly used in solar energy and low-valley electric heating systems. In reality, with the continuous improvement of urban environmental protection requirements, more and more solar heating and coal-to-electric heating supply, hot water storage tanks have become indispensable supporting equipment, many users cannot To meet the heating requirements and due to safety or system design reasons, it cannot be turned into a pressurized system, so a device that can increase the heat capacity of the tank is required. Phase-change heat storage materials can greatly increase the heat storage capacity per unit volume, and a...

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Problems solved by technology

[0003] The present invention provides a thermal capacity increasing device for a hot water storage tank. The problem to be solved is to increase the heat storage capacity of the water tank by adding a thermal storage capacity increasing device to the water tank when the size of the water tank cannot be changed, so as to increase the storage capacity of the water tank. The purpose of heat capacity

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