CN212227207U

CN212227207U - Centralized solar air heat collection water heating device

Info

Publication number: CN212227207U
Application number: CN202020758060.0U
Authority: CN
Inventors: 康宏; 刘孝敏; 王亚刚; 徐平; 刘叶瑞; 刘春江
Original assignee: Gansu Natural Energy Research Institute (international Solar Technology Promotion And Transfer Center Of United Nations Industrial Development Organization)
Current assignee: Gansu Natural Energy Research Institute (international Solar Technology Promotion And Transfer Center Of United Nations Industrial Development Organization)
Priority date: 2020-05-10
Filing date: 2020-05-10
Publication date: 2020-12-25
Anticipated expiration: 2030-05-10

Abstract

The utility model belongs to the field of solar heat supply and utilization, and discloses a centralized solar air heat collection and water heating device which is provided with a solar air heat collector, wherein the solar air heat collector is communicated with a gas-water heat exchanger, and the gas-water heat exchanger is communicated with a heat collection water tank through a first heat collection circulating pump; the heat collection water tank is communicated with the positive displacement water heater through a second heat collection circulating pump, and the first heat collection circulating pump and the second heat collection circulating pump are electrically connected with the control cabinet. The combination of temperature control and temperature difference control is adopted, so that constant-temperature water supply can be achieved; the auxiliary heat source is combined, so that the water demand can be met within 24 hours; by utilizing the one-way conduction function of the check valve and the adjusting effect of the expansion tank absorption system on water hammer impact and the positive displacement water heater caused by opening and closing of a valve, a water pump and the like, the service life of the water pump is prolonged, the problem that a hot water system is unstable in operation can be reliably and effectively solved, and the system has the characteristics of safety, reliability and good using effect.

Description

Centralized solar air heat collection water heating device

Technical Field

The utility model belongs to solar energy heat supply utilizes the field, especially relates to a centralized solar energy air thermal-arrest hot water system.

Background

At present, solar energy is praised as 'clean energy' and 'safe energy' due to its characteristics of clean, pollution-free and renewable energy. The solar energy is converted into about 500 ten thousand tons of standard coal per second, and the energy released by the standard coal irradiates the earth. According to statistical data, the total solar radiation amount in China can be found to be 3300-8300 MJ/(m)²Year) interval, belonging to a region with rich distribution. At the present stage of China, solar heat utilization is mainly divided into hot water utilization, thermal power generation utilization and heating and air conditioning.

The human life can not be kept hot water, and the use of the hot water becomes a big mark of the improvement of the human life and the social progress. Solar energy utilization begins to develop from solar water heaters of single users to solar heating and solar water heating projects, the importance of solar water heating project building integration is more highlighted in the urbanization process, and the hot water engineering is leading the industrial market to develop rapidly.

The heat collectors of the traditional solar water heating systems all use liquid, particularly water, as a heat transfer medium, so that the conditions of serious heat waste of a system in summer, easy pipe explosion or difficult emptying of the heat collectors in winter, slow hot water discharge and the like exist, and the heat collectors are particularly prominent in cold, water-deficient and power-supply-deficient areas. The areas with relatively lagged economic development and relatively severe natural environment are areas with abundant solar energy resources and large heating and hot water supply requirements.

The solar water heating system is the most economical domestic hot water system, but the function of the solar water heating system is influenced by the intensity of solar radiation and the arrangement of a heat collector, and a corresponding auxiliary heating system is required. The restriction of direct application of electric energy as heat energy for heating and domestic hot water supply has been clearly proposed in the relevant national energy saving regulations. Especially, the solar energy central hot water system is not suitable for auxiliary electric heating.

The most similar scheme of the invention is a solar water heating system which also adopts a solar air collector as a heat source, takes the problems of frost crack, leakage, overheating, corrosion and the like of the heat collecting system which can occur in the solar water heating system in winter and the problem of service life into consideration, and adopts a single water tank and an auxiliary heat source to supply water to the tail end of water without a water tail end return pipe.

With the world energy crisis and the situation that the country actively pushes energy conservation and emission reduction and develops low-carbon economy, solar energy is gradually popularized and applied in a hot water supply system as clean, energy-saving and sustainable renewable energy. The solar water heating system widely applied to the fields of houses, hotels, offices and the like in the prior art also has many problems in operation, such as the defects of instability and slow water outlet of most systems for preparing domestic hot water, low water supply safety, frequent need of adding an electric auxiliary heat source and the like.

Through the above analysis, the problems and defects of the prior art are as follows:

(1) most of systems have the defects of instability and slow water outlet when preparing domestic hot water, the water supply safety is low, and an electric auxiliary heat source is often required to be added.

(2) The heat collectors of the traditional solar water heating systems all use liquid, particularly water, as a heat transfer medium, so that the conditions of serious heat waste of a system in summer, easy pipe explosion or difficult emptying of the heat collectors in winter, slow hot water discharge and the like exist, and the heat collectors are particularly prominent in cold, water-deficient and power-supply-deficient areas.

The difficulty in solving the above problems and defects is: under the condition that solar energy resources are unstable, how to supply water to a solar water heating system at a fixed temperature is achieved, and the system is safe and stable to operate.

The significance of solving the problems and the defects is as follows: the working mode of a closed system and forced circulation is adopted, and the arrangement of various valve components such as a solar air heat collector, a positive displacement water heater, an expansion tank, auxiliary energy and the like is matched, so that the normal and stable operation of the whole system can be ensured at night or under the condition of insufficient solar energy. The utility model discloses but extensive application is used for cold climate district and large-and-medium-sized concentrated thermal-arrest hot-water heating system, is favorable to marketing application and hot-water heating system engineering.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a centralized solar air heat collection water heating device.

The utility model is realized in such a way that a centralized solar air heat collection water heating device is provided with a solar air heat collector which is communicated with an air-water heat exchanger, and the air-water heat exchanger is communicated with a heat collection and storage water tank through a first heat collection circulating pump;

the heat collection and storage water tank is communicated with the positive displacement water heater through a second heat collection circulating pump, and the first heat collection circulating pump and the second heat collection circulating pump are electrically connected with the control cabinet.

Further, the positive displacement water heater is provided with an auxiliary heat source.

Further, the solar air heat collector is provided with a heat storage device and a solar energy conversion device.

Furthermore, an expansion tank is arranged on the pipeline where the second heat collection circulating pump is arranged

Further, a circulating fan is installed on the pipeline where the gas-water heat exchanger is located.

Furthermore, a first temperature sensor is arranged at a hot air outlet of the solar air heat collector, a second temperature sensor is arranged at the 1/3 height position of the bottom of the heat collecting and storing water tank, a third temperature sensor is arranged at the 1/3 height position of the tank body at the bottom of the positive displacement water heater, a fourth temperature sensor is arranged on an RH water return pipeline at the tail end of the positive displacement water heater and the water, and a fifth temperature sensor is arranged on an HRH heat exchange pipeline between the gas-water heat exchanger and the heat collecting and storing water tank;

the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor and the fifth temperature sensor are all electrically connected with the control cabinet.

Combine foretell all technical scheme, the utility model discloses the advantage that possesses and positive effect are:

firstly, temperature control and temperature difference control are combined, so that constant-temperature water supply can be achieved;

secondly, an auxiliary heat source is combined, and the water demand can be met within 24 hours;

thirdly, the service life of the water pump is prolonged by utilizing the one-way conduction function of the check valve and the regulating action of a water hammer impact and a positive displacement water heater caused by opening and closing of a valve, a water pump and the like of an expansion tank absorption system, the problem that a hot water system is unstable in operation can be reliably and effectively solved, and the system has the characteristics of safety, reliability and good using effect;

fourthly, the solar water heater can be widely applied to cold climate areas and large and medium concentrated heat collection hot water systems, and is beneficial to market popularization and application and hot water system engineering.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is a schematic structural view of a centralized solar air heat collection water heater according to an embodiment of the present invention.

In the figure: 1. a solar air collector; 2. a gas-water heat exchanger; 3. a circulating fan; 4. a first heat collection circulating pump; 5. a heat collecting and storing water tank; 6. a second heat collection circulating pump; 7. a positive displacement water heater; 8. an auxiliary heat source; 9. a heat collection circulating pump; 10. ending with water; 11. a control cabinet; 12. an expansion tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to solve traditional solar water heating system heat collector and all regard as heat transfer medium with liquid especially water, heat collector and pipeline are prevented frostbite in winter, conventional energy uses, large-scale concentrated thermal-arrest hot-water heating system operation stability scheduling problem, the utility model provides a centralized solar air thermal-arrest hot-water heating device under the prerequisite of adopting solar air heat collector 1, has carried out deep optimal design to solar energy central thermal-arrest hot-water heating system, but the system automatic control for the system is stable, cold and hot water pressure balance, and it is steady to use the pressure variation of water spot department, and the constant temperature goes out water, is favorable to marketing application and hot-water heating system engineering, and it is right to combine the figure below the utility model discloses do detailed description.

The utility model relates to a solar energy collection hot-water heating system that concentrates, fine day, solar energy air heat collector 1 is concentrated to be arranged and is absorbed a large amount of solar radiation energy and turn into heat energy, supplies with terminal 10 sufficient water consumption of water through water tank, the storage of positive displacement water heater 7 branch family, and night and when solar radiation is insufficient, the auxiliary energy (gas, boiler etc.) start-up heating can satisfy the water consumption of terminal 10 of water to guarantee system safety and stability's operation. It comprises a solar air heat collector 1 (with heat storage function, absorbing solar energy, converting into heat energy, storing, improving system efficiency, and not needing to prevent freezing), a circulating fan 3, a gas-water heat exchanger 2, a heat collecting circulating pump 9, a heat collecting and storing water tank 5, an expansion tank 12 (for absorbing water hammer impact of the system caused by opening and closing valves, water pumps and the like, and reducing electricity consumption and prolonging service life of the water pumps by making a main pump of the water supply system sleep by a small amount of water supplement at night), the water supply system comprises a one-way check valve, a water replenishing electromagnetic valve, a positive displacement water heater 7 (with larger storage and regulation capacity, smaller pressure loss when heated water passes through, stable pressure change at a water using point and more stable water temperature of outlet water), an auxiliary heat source 8 (selectable gas, a boiler and the like), a water supply heat pump, a water end 10 system (adopting a closed forced circulation upper supply and lower return type) and a control cabinet 11. Wherein the first heat collecting circulating pump 4 and the check valve are arranged on an HRH heat exchange pipeline between the heat exchanger and the heat collecting and heat storing water tank 5, the second heat collecting circulating pump 6, the expansion tank 12 and the check valve are arranged on an RJ pipeline between the heat collecting and heat storing water tank 5 and the positive displacement water heater 7, and the hot water supply pump and the check valve are arranged on an RH pipeline between the positive displacement water heater 7 and the water supply tail end.

The utility model discloses further set up to: a hot air outlet of the solar air heat collector 1 is provided with a temperature sensor T1; a temperature sensor T2 is arranged at the height 1/3 of the bottom of the heat collecting and storing water tank 5; the water replenishing electromagnetic valve is arranged on a J water replenishing pipeline of the heat collecting and storing water tank 5 and is used for replenishing water to the whole hot water system when the water quantity of the system is not total; the bottom 1/3 of the positive displacement water heater 7 is provided with a temperature sensor T3 at the height of the tank body, the positive displacement water heater 7 and the RH water return pipeline at the tail end 10 of water are provided with a temperature sensor T4, the HRH heat exchange pipeline between the gas-water heat exchanger 2 and the heat collection and storage water tank 5 is provided with a temperature sensor T5, and the whole system adopts the combination of temperature and temperature difference control.

The utility model discloses but the system automatic control, the system is stable, cold and hot water pressure balance, and it is steady to use the pressure variation of water point department, can realize the water supply of deciding the temperature.

The working mode of a closed system and forced circulation is adopted, and the arrangement of various valve components such as a solar air heat collector 1, a positive displacement water heater 7, an expansion tank 12, auxiliary energy sources and the like is matched, so that the normal operation of the whole system can be ensured at night or under the condition of insufficient solar energy.

The specific implementation mode is as follows:

1. and (3) heating the heat collection and storage water tank 5: when the temperature T2 of the water tank is less than or equal to 50 ℃ (adjustable) and the temperature of the heat collector is more than or equal to 70 ℃, the circulating fan 3 and the first heat collection circulating pump 4 are started; when the temperature of the water tank is more than or equal to 55 ℃ (adjustable) or the temperature of the heat collector T1 is less than or equal to 60 ℃ (adjustable), the circulating fan 3 and the second heat collection circulating pump 6 are closed.

2. And (3) water replenishing of the heat collection and storage water tank 5 (system water replenishing): when the temperature T2 of the water tank is more than or equal to 50 ℃ (adjustable) and the water level of the water tank is less than or equal to 50%, the water supplementing electromagnetic valve is opened to supplement cold water; when the temperature T2 of the water tank is less than or equal to 45 ℃ (adjustable) or the water level of the heat storage water tank is more than or equal to 80%, the electric water replenishing valve is closed, and water replenishing is stopped.

3. Positive displacement water heater 7: when T2-T3 is more than or equal to delta T1, the second heat collection circulating pump 6 is started, and delta T1 preferably takes the following values: 5-8 ℃; when T2-T3 is not more than delta T2, the second heat collection circulating pump 6 is closed, and delta T2 is preferably selected as follows: 1 to 3 ℃; when the temperature T3 is less than or equal to 55 ℃, the auxiliary heat source 8 is used for auxiliary heating; when the temperature T3 is more than or equal to 60 ℃, the auxiliary heat source 8 stops heating;

4. hot water constant temperature water supply: when the RH return water temperature T4 is less than or equal to 35 ℃ and the temperature T3 of the positive displacement water heater 7 is more than or equal to 45 ℃, the return water valve is opened, and the hot water supply pump is automatically started; when the return water temperature T4 is not less than 38 ℃ or the temperature T3 of the positive displacement water heater 7 is not more than 42 ℃, the return valve is closed, and the hot water supply pump is automatically closed.

5. Anti-freezing of solar heat exchange pipelines (when heat exchangers and pipelines are arranged outdoors): when the temperature of the heat exchange pipe T5 is less than or equal to 5 ℃, the first heat collection circulating pump 4 is started; when the temperature T5 is more than or equal to 10 ℃, the first heat collection circulating pump 5 operates for two minutes and is closed.

On fine days, the solar air heat collector 1 is intensively arranged to absorb a large amount of solar radiation energy to convert the solar radiation energy into heat energy and store the heat energy, heat water is heated through heat exchange of the air-water heat exchanger 2, the fan and the like and stored in the water tank and the volumetric water heater 7, sufficient water consumption at the tail end 10 of water supplied by individual households is stored through the volumetric water heater 7, auxiliary energy (gas, a boiler and the like) is started to heat at night and when the solar radiation is insufficient, the water consumption at the tail end 10 of the water can be met, the service life of a water pump is prolonged by utilizing the one-way conduction function of a check valve and the regulating function of the volumetric water heater 7 and the water hammer impact caused by the opening and closing of a valve, a water pump and the like of an absorption system of the expansion tank 12.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be covered within the protection scope of the present invention by those skilled in the art within the technical scope of the present invention.

Claims

1. The centralized solar air heat collection water heating device is characterized in that a solar air heat collector is arranged on the centralized solar air heat collection water heating device, the solar air heat collector is communicated with an air-water heat exchanger, and the air-water heat exchanger is communicated with a heat collection and storage water tank through a first heat collection circulating pump;

2. The concentrated solar air heat collection hot water apparatus of claim 1, wherein the positive displacement water heater is provided with an auxiliary heat source.

3. The concentrating solar air heat collecting hot water apparatus as claimed in claim 1, wherein the solar air heat collector is provided with a heat storage means and a solar energy conversion means.

4. The centralized solar air heat collection water heating apparatus of claim 1, wherein the pipeline on which the second heat collection circulating pump is located is provided with an expansion tank.

5. The centralized solar air heat-collecting water heating device as claimed in claim 1, wherein a circulating fan is installed on a pipeline where the air-water heat exchanger is located.

6. The centralized solar air heat-collecting water heater according to claim 1, wherein a first temperature sensor is arranged at a hot air outlet of the solar air heat collector, a second temperature sensor is arranged at the 1/3 height position of the bottom of the heat-collecting and heat-storing water tank, a third temperature sensor is arranged at the 1/3 tank height position of the bottom of the positive displacement water heater, a fourth temperature sensor is arranged on an RH water return pipeline at the tail end of the positive displacement water heater and a water using end, and a fifth temperature sensor is arranged on an HRH heat exchange pipeline between the gas-water heat exchanger and the heat-collecting and heat-storing water tank;