Temperature stratification type heat accumulating/releasing device

Abstract

The invention relates to a temperature stratification type heat accumulating / releasing device, and belongs to the technical field of water heat accumulation. The device is characterized by comprising a water inlet, a heat accumulating tank, a heat accumulating tank cover, an inlet water distributor, an outlet water collector, a drain outlet, an upper flow equalizing plate, a lower flow equalizing plate, a heat exchange medium water collecting header, a heat exchange medium water separating header, a medium heat exchange pipe, a highest liquid level sensor, a lowest liquid level sensor and a liquid temperature sensor. The heat accumulating tank is divided into four areas of an upper flow stabilizing area, an air layer area, a main heat accumulating area and a lower flow stabilizing area. The heat exchange medium water collecting header and the heat exchange medium water separating header are two-dimensional spiral coils, and are mounted parallel to a baseplate of the heat accumulating tank; and the medium heat exchange pipe is perpendicular to the heat exchange medium water collecting header and the heat exchange medium water separating header. A heat accumulating fluid enters the heat accumulating tank from the inlet water distributor, and flows out from the tank from the outlet water collector to form a stable piston flow from top to bottom in the main heat accumulating area in the tank; and a heat exchange medium flows from bottom to top in the medium heat exchange pipe to form a totally upstream flowing mode with the heat accumulating fluid.

Description

technical field [0001] The invention relates to a temperature layered heat storage and discharge device, which belongs to the technical field of water heat storage. Background technique [0002] In the waste heat and renewable energy utilization system, the water heat storage device is a common equipment to provide users with a heat source for heating or domestic hot water. In order to prevent the mixing of hot water with high temperature and cold water with low temperature in the heat storage device, and even water circulation in the device, common water heat storage devices include mixing tank type, labyrinth type and temperature stratification type, among which , the temperature stratified heat storage tank has the characteristics of simple structure and low cost and has been widely used. The temperature stratified heat storage tank utilizes the different density of water at different temperatures to realize the natural isolation of hot water and cold water in the same h...

AI Technical Summary

Problems solved by technology

For example, the invention patent discloses a water storage tank energy storage system and its use method (patent application number 200610171597.1) and a high-efficiency temperature stratified water energy storage device (patent application number 201110058580.6), and the invention patent high-efficiency temperature stratification In order to further solve the problem that there is turbulence below the thermocline layer due to the interference of the inlet flow field, a part of the energy in the thermocline layer is brought to the lower part, so that the heat storage effect of the heat storage tank is not ideal. , a water-permeable flat-type porous medium plate is respectively arranged on the upper and lower parts of the inner cavity of the water storage tank

Although the current temperature stratified heat storage and release device partially solves the problem of natural and stable stratification of water, the heat storage and heat release of the heat storage device cannot be carried out at the same time, that is, the heat storage time and heat release time must be independent; at the same time , the heat storage device is a pressurized system, that is, the water distributor is submerged in water. Therefore, if the circulation flow of the system is greater, the water flow in and out of the heat storage device is greater, and the water distribution intensity of the water distributor is greater, which has a greater impact on heat storage. The greater the disturbance of the water body in the device, the more obvious the phenomenon of mixing hot and cold water, and the worse the heat storage effect

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