CN204901906U - Millet ferroelectric phase becomes heat -retaining formula and adopts warm water system - Google Patents

Abstract

The utility model relates to a heating and hot water system of a valley electricity phase change heat storage type, the system includes a heat source electric heater, a phase change heat storage device, a primary water pump, a hot water plate changer, a heating plate changer and a heating plate changer connected Terminal equipment, the medium outlet of the phase change heat storage device is connected to the primary water pump, heat source electric heater, hot water plate exchange and heating plate exchange through pipelines, and is connected to the phase change through the return port of the heating plate exchange. The heat storage device constitutes a heating and hot water circulation loop, and a secondary heating water pump is also provided between the heating panel exchange and the terminal equipment. Compared with the prior art, the utility model has the advantages of simple structure, convenient installation, high thermal efficiency of the system, pressure-bearing operation, and low operating cost by using off-peak electricity prices, which overcomes the shortcomings of complex heating and hot water systems and high operating costs, and can stably and continuously Provide heat source, through connecting terminal heat dissipation equipment and domestic hot water pipeline, for building heating and domestic hot water demand.

Description

A valley electricity phase change heat storage heating and hot water system

technical field

The utility model belongs to the technical field of heating, ventilation, water supply and drainage systems, and relates to a heating and hot water system, in particular to a valley electricity phase change heat storage type heating and hot water system.

Background technique

At present, heating and hot water systems are mainly divided into natural circulation heating and hot water systems and mechanical circulation heating and hot water systems. Among them, the working principle of the natural circulation heating hot water system is: before the system runs, the whole system must be filled with cold water. When the system is working, the water is heated in the boiler, and the density becomes smaller. The hot water in the radiator releases heat, the temperature decreases, the density increases, and then flows back to the boiler along the return pipe. Although the natural circulation heating and hot water system is simple in installation and easy to operate, due to the limited pressure of the system and the small flow rate of the pipeline, the pipe diameter is too large, resulting in a high initial investment. The working principle of the mechanical circulation heating hot water system is: the water pump is used to force the circulation, and the resistance of the water flow in the entire circular pipeline is overcome by the power provided by the water pump. The head of the water pump is mainly determined by the flow resistance. Due to the arrangement of the circulating water pump, the action pressure generated by the water pump is very large, so the heating range can be expanded, not only can be used for heating a single building, but also can be used for district heating, and is widely used. However, the operating electricity and maintenance costs of this system are higher than those of the natural circulation heating and hot water system.

Existing ordinary heating and hot water systems mostly use boilers or heat pumps, but boilers have high operating costs and cause environmental pollution, while heat pumps have relatively high initial investment. In response to the above problems, many improvements have been made in the design of heating and hot water systems.

For example, the Chinese Utility Model Patent Application No. 201210308713.5 discloses a heat pump system for heating hot water and sanitary hot water, including a heat pump host and a water tank; one end of the evaporator is connected to a condenser through an expansion valve, and the other end is connected to a compressor. The machine is connected with a condenser, one end of the condenser is connected to the hot water storage tank through a heating circulating water pump, and the other end is directly connected to the hot water storage tank; the sanitary hot water heating coil is arranged in the hot water storage tank, and the sanitary hot water heating One end of the coil is the sanitary hot water inlet, and the other end is the sanitary hot water outlet; the hot water storage tank is provided with a heating hot water outlet, and the heating hot water outlet is connected to the heating space, and is connected back to the hot water storage tank through the heating circulating water pump.

There are also heating systems that combine solar energy with phase change heat storage. For example, the Chinese utility model patent application number 201210494454.X discloses a heat pipe heating system using solar energy, including: The pipe is connected to the hot water storage tank. The hot water storage tank has a built-in phase change heat storage block. The water pump is connected to the coil in the hot water storage tank and the coil in the heat preservation and heat exchange tank through the thermal insulation circulating hot water pipe. One end of the heat pipe is inserted into the thermal insulation In the heat exchange box, the other end has fins.

Utility model content

The purpose of this utility model is to provide a valley electricity phase change heat storage heating and hot water system with high thermal efficiency, simple structure and installation, which can effectively solve the problems of high operating costs and environmental protection in order to overcome the defects of the above-mentioned prior art. .

The purpose of this utility model can be achieved through the following technical solutions:

A valley electricity phase change heat storage type heating and hot water system, the system includes a heat source electric heater, a phase change heat storage device, a primary water pump, a hot water plate exchange, a heating plate exchange, and terminal equipment connected to the heating plate exchange. The medium outlet of the phase change heat storage described above is connected to the primary water pump, heat source electric heater, hot water plate exchange and heating plate exchange through pipelines in turn, and is connected to the medium inlet of the phase change heat storage through the heating plate exchange. A heating and hot water circulation loop is formed, and a secondary heating water pump is also provided between the heating panel exchange and the terminal equipment.

A liquid injector for injecting circulating medium is also provided between the primary water pump and the phase change heat storage.

An expansion tank is also provided between the liquid filling device and the primary water pump.

The circulating medium includes one of water, antifreeze, heat conduction oil or superconducting liquid.

An expansion tank is arranged between the primary water pump and the heat source electric heater.

The electric heat source heater can be selected to electrically heat the steel cup.

In actual use, the heat source electric heater uses the valley electricity to heat the circulating medium at night, and supplies heat to the hot water plate exchange and the heating plate exchange through the heating hot water circulation circuit. At the same time, part of the heat will be stored in the phase change heat storage device , and during the daytime peak power period, the heat source electric heater stops working. At this time, the heat stored in the phase change heat storage is transported to the hot water plate for heat exchange and the heating plate for heat supply through a primary water pump, and after heat exchange and cooling After the circulating medium is returned to the phase change heat storage for reheating, the circulating heat supply is continued.

The phase change heat storage uses the latent heat of the phase change material to store heat. When the electricity price is low, the heat is stored in the phase change heat storage. The phase change material absorbs heat and changes from solid to liquid; when the electricity price is high, the phase change heat storage will The heat is sent to the terminal equipment, and the phase change material releases heat, changing from liquid to solid.

In the selection process of the expansion tank and the expansion water tank, the expansion tank is used for the smaller system to expand the circulating medium of the system at constant pressure, and the constant pressure expansion tank can be set at a high point for the larger system.

The utility model separates domestic hot water demand and heating demand by two different plate exchanges. The two plate exchanges operate independently on the secondary side, and the primary side shares the heat source; the primary water pump delivers heat to the heating plate exchange or the primary side. Hot water plate replacement; the secondary heating pump transmits heat to the terminal equipment on the secondary side of heating, and the power of the secondary side of hot water plate replacement is mainly provided by tap water pressure.

The primary side of the utility model can realize the combined working condition of charging and supplying heat at night. During daytime work, the heat source electric heater is not energized and is only used as a pipeline, and the stored heat of the phase change heat storage device is used to supply heat to the end. , can provide heating heat source or domestic hot water stably and continuously, and can be used for heating and domestic hot water demand of buildings by connecting terminal heat dissipation equipment and domestic hot water pipelines.

Compared with the prior art, the utility model has a simple structure and is convenient to manufacture, and the system has a high heat storage capacity and a small external dimension. Because the phase change process of the phase change material is stable, the system can provide heating and hot water heat sources stably and continuously, and at the same time The use of valley electricity as the system heat source is in line with the national policy orientation of energy conservation and emission reduction. It has zero pollution to the environment, zero emissions, safe, simple and reliable operation, and saves operating costs.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Instructions for marks in the figure:

1—heat source electric heater, 2—phase change heat storage, 3—primary water pump, 4—hot water plate replacement, 5—heating plate replacement, 6—terminal equipment, 7—secondary heating water pump, 8—liquid filling device , 9—expansion water tank, 10—expansion tank.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example:

As shown in Figure 1, a valley electricity phase change heat storage heating and hot water system, the system includes a heat source electric heater 1, a phase change heat storage device 2, a primary water pump 3, a hot water plate changer 4, and a heating plate changer 5 As well as the terminal equipment 6 connected to the heating plate changer 5, the medium outlet of the phase change heat storage device 2 is connected to the primary water pump 3, the heat source electric heater 1, the hot water plate changer 4 and the heating plate changer 5 sequentially through pipelines, and through The heating panel changer 5 is connected back to the medium inlet of the phase change heat storage device 2 to form a heating hot water circulation loop, and a secondary heating water pump 7 is provided between the heating panel changer 5 and the terminal equipment 6 .

Wherein, between the primary water pump 3 and the phase change heat storage 2, there is also a liquid filling device 8 for injecting circulating medium, and an expansion tank 9 is also provided between the liquid filling device 8 and the primary water pump 3; the primary water pump 3 and the heat source An expansion tank 10 is arranged between the electric heaters 1 .

The circulating medium includes one of water, antifreeze, heat conduction oil or superconducting liquid; the heat source electric heater 1 can choose an electric heating steel cup.

The system separates domestic hot water demand and heating demand by two different panels. The two panels operate independently on the secondary side, and the primary side shares the heat source; the primary water pump 3 delivers heat to the heating panel 5 or 5 on the primary side. Hot water plate replacement 4; the secondary heating pump 7 transmits heat to the terminal equipment 6 on the secondary side of heating, and the power of the secondary side of the hot water plate replacement 4 is mainly provided by tap water pressure.

In actual use, the heat source electric heater 1 uses valley electricity to heat the circulating medium at night, and supplies heat to the hot water plate exchange 4 and the heating plate exchange 5 through the heating hot water circulation circuit. At the same time, part of the heat will be stored in the phase change storage Heater 2, while during the daytime peak power period, the heat source electric heater 1 stops working. At this time, the heat stored in the phase change heat storage 2 is transported to the hot water plate changer 4 and the heating plate changer 5 through the primary water pump 3 heat supply, and the circulating medium cooled by heat exchange is returned to the phase change heat storage 2 for reheating, and then the circulating heat supply is continued.

The phase change heat storage device 2 uses the latent heat of the phase change material to store heat. When the electricity price is low, the heat is stored in the phase change heat storage device 2. The phase change material absorbs heat and changes from solid to liquid; when the electricity price is high, the phase change heat storage The device 2 transmits heat to the terminal device 6, and the phase change material releases heat, changing from liquid to solid.

In the selection process of the expansion tank 10 and the expansion water tank 9, the expansion tank 10 is used for the smaller system to expand the constant pressure of the system circulation medium, and the constant pressure expansion tank 9 can be set at a high point for the larger system.

The system uses 80MJ phase-change heat storage 2, and the power of the electric heater is 3kw. At night, the phase-change heat storage 2 can be filled with heat through 8 hours of off-peak electricity at night.

Assuming a room with an area of 20m ² and a heating power of 70w/m ² , the phase change heat storage device 2 can provide heating for the room for 80/3.6/(20×70/1000)=15.9 hours. Its maximum instantaneous heating power can reach 9kw.

Assuming that a person needs 60L of hot water for bathing, the temperature of tap water is 15 degrees, and the required temperature of hot water is 45 degrees, then the phase change heat storage device 2 can satisfy 80/(60×(45-15)×4.18/1000)=10.6 people, It can satisfy 10-11 people to take a bath.

Assume that the low electricity price is 0.3 yuan/kwh, the peak electricity price is 1 yuan/kwh, the gas price is 4.2 yuan/m ³ , the calorific value of gas is 8400 kcal/m ³ , and the efficiency is 90%.

Compared with the direct electricity supply system of ordinary electric water heaters, one cycle of the system in this embodiment can save operating costs = (1-0.3) × 80/3.6 = 15.5 yuan, and the saving ratio reaches 70%; compared with gas, it can save = 80/(8400 ×4.18/1000)/0.9×4.2-0.3×80/3.6＝4 yuan, saving 37%.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (5)

1. A valley electricity phase change heat storage type heating and hot water system, characterized in that the system includes a heat source electric heater, a phase change heat storage device, a primary water pump, a hot water plate changer, a heating plate changer and a heating plate changer The terminal equipment connected, the medium outlet of the phase change heat storage device is connected to the primary water pump, heat source electric heater, hot water plate exchange and heating plate exchange in sequence through pipelines, and is connected to the phase change storage through the heating plate exchange. The medium inlet of the heater constitutes a heating hot water circulation loop, and a secondary heating water pump is also arranged between the heating plate exchange and the terminal equipment. 2. A valley electricity phase-change heat storage heating and hot water system according to claim 1, characterized in that, between the primary water pump and the phase-change heat storage, there is also a filling liquid for injecting the circulating medium device. 3. A valley electricity phase change heat storage heating and hot water system according to claim 2, characterized in that an expansion tank is also provided between the liquid injector and the primary water pump. 4 . The valley current phase change heat storage heating and hot water system according to claim 2 , wherein the circulating medium includes one of water, antifreeze, heat transfer oil or superconducting liquid. 5. A valley electricity phase change heat storage heating and hot water system according to claim 1, characterized in that an expansion tank is provided between the primary water pump and the heat source electric heater.