Single-tank heat storage device with phase change heat storage function and use method thereof

Abstract

The invention discloses a single-tank heat storage device with a phase change heat storage function. The single-tank heat storage device with the phase change heat storage function comprises a single-tank heat reservoir, heat insulation boards, a phase change heat storage device, a heat release coil heat exchanger, a heat supply device and a heat transferring device, wherein the outer top of the single-tank heat reservoir is provided with a heat storage medium inlet; the outer bottom of the single-tank heat reservoir is provided with a heat storage medium outlet; the heat insulation boards are arranged inside the single-tank heat reservoir and are coaxial with the single-tank heat reservoir; the phase change heat storage device is arranged in the heat insulation boards, fixed inside the single-tank heat reservoir through a tube plate and filled with phase change heat storage media; the heat release coil heat exchanger is arranged on the upper portion of an annular channel formed by the heat insulation boards and the single-tank heat reservoir; an outlet and an inlet of the heat release coil heat exchanger are connected with a heating medium inlet and a heating medium outlet of an energy utilization device respectively; the heat supply device is arranged outside the single-tank heat reservoir; the heat transferring device is arranged at the bottom in the single-tank heat reservoir and connected with the heat supply device. The single-tank heat storage device with the additional phase change heat storage function has the advantages that the structure is simple, the heat storage capacity is increased, the heat release process is stable, and the working temperature range is wide.

Description

technical field [0001] The invention relates to the technical field of heat storage energy utilization, in particular to a single-tank heat storage device with phase change heat storage and a method for using the same. Background technique [0002] Chai Jing's "Under the Dome" is a strong tipping point of the "energy-life" problem, and the smog problem caused by energy consumption has once again focused people's attention. If the adjustment of the energy structure is not carried out, the smog problem will be difficult to solve, and it will even restrict the economic development of our country. Therefore, the development of renewable energy has gradually become a national policy of our country. Energy storage is a key link in the large-scale utilization of renewable energy. Energy storage can improve the efficiency of high-temperature solar heat utilization, improve the current problem of wind power and photovoltaic power generation that are difficult to connect to the grid,...

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Problems solved by technology

[0003] At present, the relatively mature heat storage method for high-temperature solar heat utilization is double-tank sensible heat storage, the heat storage device is huge, and the system investment and maintenance costs are high. In order to reduce the heat storage cost, the applicant's patents ZL201420140252. A single-tank energy storage device and a single-tank electric energy storage device store solar thermal energy or electric energy in the form of sensible heat in a single tank, and then use an immersion heat exchanger to realize the storage and release of heat energy. Thermal system saves cost and saves space

However, this patent only realizes sensible heat storage, and does not take into account latent heat utilization. In order to improve heat storage efficiency, the present invention proposes a heat storage device with phase change heat storage, which realizes both sensible heat storage and latent heat storage. hot

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