CN201059666Y - High-efficiency temperature layered water storage tank - Google Patents

Abstract

The temperature layered heat storage tank includes a column type heat storage tank, a hot water outlet pipe and a hot water inlet pipe are connected above the tank body of the heat storage tank, and a cold water inlet pipe and a hot water inlet pipe are connected at the bottom of the tank body. The return pipe of the heating loop is characterized in that: the hot water inlet pipe enters vertically from the upper end of the water tank, the lower end of the pipe is closed, and the pipe section arranged longitudinally along the hot water storage tank is provided with at least three longitudinal water outlet pipes; the cold water inlet pipe and the heating The loop return pipe is connected to the bottom of the heat storage tank, the pipe section is arranged horizontally, the end of the pipe is closed, and at least 3 holes are evenly arranged on both sides of the pipe section in the horizontal direction; the hot water outlet pipe is arranged on the upper part of the water tank, and its structure is similar to that of the cold water inlet pipe. same. The utility model can reduce the interference and mixing of water between water layers of different temperatures through the specially designed water inlet and outlet pipes, better realize the stratification of water, and increase the effective heat storage capacity of the water tank. The utility model can be used as a heat storage device of a solar energy or common hot water heating system.

Description

High-efficiency temperature layered water storage tank

technical field

The utility model relates to a heat storage device in the heat supply field, in particular to a temperature layered heat storage tank.

Background technique

With the rapid development of my country's economy, energy shortages and environmental pollution problems have become increasingly prominent. As a very important clean and renewable resource, solar energy has become an issue of concern in the academic circles. At present, in our country, the solar water heating system has entered the stage of popularization and application. However, due to the instability of solar radiation and the inconsistency between solar radiation and heat load, heat storage devices are an essential part of solar heating systems. Due to the high specific heat and stable performance of water, the sensible heat storage of water is the most mature and widely used heat storage method. At present, water tanks are generally used as heat storage devices in solar water heating systems, and the heat storage tanks used in heating systems in my country generally have hot water outlets, cold water inlets, and heat collectors on the water tanks. The inlet and outlet of the connection, the water temperature of this kind of heat storage tank is mixed together, the overall temperature is too high, so that the temperature of the water flowing back into the collector is almost the same as the temperature of the hot water taken by the user, resulting in low efficiency of the collector, especially But when the user needs hot water at a higher temperature, it needs to be assisted by conventional energy for heating. Therefore, improving the efficiency of the entire solar energy system and improving the effective heat storage capacity of the heat storage tank are the key to solving the problem.

Contents of the invention

The purpose of this utility model is to provide a temperature layered heat storage tank, which reduces the flow rate of water in the water tank through different water inlet and outlet devices, and the heating water automatically flows into the water layer with similar temperature, reducing the temperature of different temperature layers. interference and mixing between them, realize the stratification of water, and overcome the disadvantages of the existing technology that the water temperature of the heat storage tank is mixed together, the water temperature of the user's water end is low, the thermal efficiency of the collector is low, and energy is wasted, which makes the temperature at the bottom of the water tank relatively high. Low, the top temperature is high, the temperature of the water flowing back into the collector is significantly lowered, and the temperature of the hot water taken by the user is significantly increased, so as to achieve the purpose of saving energy and improving heating efficiency.

The research found that the temperature stratification of water is actually not easy to achieve due to the disturbance of the inflow and outflow of water and the effects of heat conduction and convection in the water body. The degree of temperature stratification of the water tank is related to many factors such as the structure of the water tank, the structure of the water inlet and outlet pipes, and the flow rate.

The technical scheme of the utility model is achieved in that:

High-efficiency temperature stratified heat storage tank, which includes a column-type heat storage tank, a hot water outlet pipe and a hot water inlet pipe are connected above the tank body of the heat storage tank, and a cold water inlet pipe is connected at the bottom of the tank body and the return pipe of the heating loop, characterized in that: the hot water inlet pipe is vertically connected from the upper end of the water tank, the lower end of the pipe is closed, and the pipe section arranged longitudinally along the hot water storage tank is provided with at least three longitudinal water outlet pipes, and the cold water inlet pipe and The return pipe of the heating loop enters horizontally at the bottom of the heat storage tank, and the end of the pipe is closed. At least 3 orifices are evenly arranged on both sides of the middle of the pipe section; the hot water outlet pipe is arranged on the upper part of the water tank, and its structure is the same as that of the cold water inlet pipe.

The utility model adopts the water inlet (outlet) pipes evenly provided with a plurality of orifices arranged on the horizontal plane and the vertical layered water outlet pipes arranged vertically. On the one hand, the opening area of the porous inlet (outlet) water pipes is larger than that Area, through which a water flow with a small flow rate and a consistent direction can be generated, which reduces uneven flow, local convection and mixing, and can minimize the damage to the temperature stratification caused by the incoming and outgoing water flow. On the other hand, the water flow can enter the water tank at different heights and at a low flow rate through the vertical stratified outlet pipe at the top, so that hot water with different temperatures can automatically find the flow layer closest to its own temperature and realize the temperature stratification of the water tank.

The advantages and positive effects of the utility model are: through the specially designed water inlet and outlet pipes, the flow rate of the water in the water tank is reduced, the heated water automatically flows into the water layer with similar temperature, and the interference and mixing of water between different temperature water layers are reduced. The stratification of water is better realized, so that the temperature at the bottom of the water tank is lower and the temperature at the top is higher, which increases the effective heat storage capacity of the water tank. The temperature of the water flowing back into the collector is significantly reduced, and the temperature of hot water taken by the user is significantly increased, so as to achieve the purpose of increasing the effective heat storage capacity of the water tank and improving the heating efficiency of the heat source.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is a schematic diagram of the overall structure of the high-efficiency temperature stratified heat storage tank of the present invention.

1. Hot water storage tank, 2. Hot water outlet pipe, 3. Hot water inlet pipe, 4. Cold water inlet pipe, 5. Heating loop return pipe, 7. Vertical layered outlet pipe, 8. Horizontal porous water pipe.

Detailed ways

The high-efficiency temperature layered heat storage tank of this embodiment, as shown in Figure 1, includes a column type heat storage tank 1, and a hot water outlet pipe 2 is connected to the top of the tank body of the heat storage tank. The water inlet pipe 3 is located slightly lower than the tank body of the hot water storage tank, and the cold water inlet pipe 4 and the heating loop return pipe 5 are connected at the bottom of the tank body. Closed, the pipe section arranged longitudinally along the heat storage tank is provided with a plurality of vertically stratified water outlet pipes 7, and this embodiment is provided with 4 longitudinally layered water outlet pipes, so that water flows into the water tank from different heights and automatically stratified. The cold water inlet pipe 4 and the heating loop return pipe 5 are horizontally connected to the bottom of the heat storage tank, and the ends of the pipes are closed, and at least three water inlet (outlet) orifices 8 are uniformly arranged on both sides of the water pipe along the horizontal direction. 5 water inlets (outlets); the hot water outlet pipe 2 is arranged on the top of the water tank, and its structure is the same as that of the cold water inlet pipe 4. When storing heat, the hot water from the heat collector passes through the hot water inlet pipe 3 and the vertically stratified outlet pipe 7, so that the water flows into the water tank from different heights and automatically stratifies; the water with a lower temperature at the bottom of the water tank passes through the heating loop The water return pipe 5 is sent back to the solar heat collector for circulation heating. When hot water is used, the hot water on the upper part of the water tank is directly delivered to the user through the hot water outlet pipe 2; the corresponding flow of cold water enters the bottom of the water tank from the cold water inlet pipe 5. Heat storage and heat extraction can be carried out simultaneously or separately.

The utility model reduces the flow rate of water in the water tank by setting the water inlet and the water outlet in layers, so that the heating water automatically flows into the water layer with a similar temperature to realize the water layering, thereby forming a lower temperature at the bottom of the water tank and a higher temperature at the top , improve the efficiency of solar collectors by 5%-15%, and achieve the purpose of energy saving.

The utility model can be used in a solar hot water heating system, and can also be used as a heat storage device of an ordinary hot water heating system.

Claims (1)

1. efficient thermal stratification formula hot water storage tank, it includes the upright post type hot water storage tank, above the casing of hot water storage tank, be connected with hot water outlet pipe and hot water inlet pipe, be connected with cold water inlet and heating loop return pipe at bottom half, it is characterized in that: the hot water inlet pipe is vertically fed by the water tank upper end, the pipe lower end closed, the pipeline section of vertically arranging along hot water storage tank is provided with 3 vertical effluent pipe mouths at least; Cold water inlet and heating loop return pipe feed in the hot water storage tank bottom, and pipeline section is horizontally disposed, the pipe endcapped, and pipeline section horizontal direction both sides evenly are provided with at least 3 apertures; The hot water outlet pipe is arranged in water tank upper, and its structure is identical with cold water inlet.

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