CN118565082A - A solar energy system with intelligent emission control - Google Patents

Abstract

The present invention provides a solar energy system with intelligent control of discharge, the system includes a solar energy circulation pipeline, a user water pipeline and a cooling water circulation pipeline, the hot water circulating in the solar energy circulation pipeline is heated by a solar collector; the user water pipeline is connected in parallel with the solar energy circulation pipeline, its inlet is connected to the inlet of the solar energy circulation pipeline, and its outlet is connected to the outlet of the solar energy circulation pipeline, a heat exchanger, a user water valve and a discharge valve are installed on the user water pipeline, the heat source of the heat exchanger is the hot water from the solar energy circulation pipeline, the cold source of the heat exchanger is the cooling water from the cooling water circulation pipeline, and the hot water and the cooling water are heat exchanged in the heat exchanger. The present invention is provided with a discharge valve, which can ensure that the user's water consumption meets the requirements and avoids non-compliance with the requirements. At the same time, it can also ensure that when the user does not need water, the heat source in the circulation pipeline reaches the temperature requirement and is transported to the solar energy circulation pipeline, and at the same time ensure that the water consumption of the next user meets the requirements.

Description

A solar energy system with intelligent emission control

Technical Field

The invention relates to a solar energy system, in particular to a solar energy system with intelligent emission control.

Background Art

With the rapid development of modern social economy, human beings have an increasing demand for energy. However, the reserves of traditional energy such as coal, oil, and natural gas are constantly decreasing and becoming increasingly scarce, causing prices to continue to rise. At the same time, the environmental pollution caused by conventional fossil fuels is becoming more and more serious, which greatly restricts the development of society and the improvement of human quality of life. The energy problem has become one of the most prominent problems in the contemporary world. Therefore, seeking new energy, especially pollution-free clean energy, has become a hot topic of research.

Solar energy is an inexhaustible clean energy source with huge resources. The total amount of solar radiation energy received by the earth's surface each year is 1×10 ¹⁸ kW·h, which is more than 10,000 times the world's total annual energy consumption. However, since the energy density of solar radiation reaching the earth is low (about 1 kilowatt per square meter) and it is discontinuous, it brings certain difficulties to large-scale development and utilization. Therefore, in order to widely use solar energy, not only technical problems must be solved, but also it must be able to compete with conventional energy in terms of economy.

In general, solar energy systems use heated hot water and cold water after heat exchange. Sometimes there are strict requirements for the temperature of hot water, such as it must be kept within a certain range. Therefore, it is very important to design temperature control. In current solar energy systems, after the heat exchanger performs heat exchange, the fluid output at the beginning does not meet the requirements, so measures need to be taken to remove it for use. After the water after heat exchange is used, it is often discharged into the circulation pipeline. At this time, the temperature after heat exchange may be too low to affect the use of the next household, so this part of water also needs to be discharged.

In view of the above requirements, the present invention has made improvements. The present invention is provided with a discharge valve to ensure that the user's water consumption meets the requirements and avoids non-compliance with the requirements. At the same time, it can also ensure that when the user does not need water, the heat source in the circulation pipeline reaches the temperature requirement and is transported to the solar circulation pipeline, while ensuring that the water consumption of the next user meets the requirements.

Summary of the invention

In order to achieve the above object, the technical solution of the present invention is as follows:

A solar energy system with intelligent emission control, the system comprising a solar energy circulation pipeline, a user water pipeline and a cooling water circulation pipeline, the hot water circulating in the solar energy circulation pipeline is heated by a solar collector; the user water pipeline is connected in parallel with the solar energy circulation pipeline, the inlet of the user water pipeline is connected to the inlet of the solar energy circulation pipeline, and the outlet of the user water pipeline is connected to the outlet of the solar energy circulation pipeline, a heat exchanger, a user water valve and a discharge valve are installed on the user water pipeline, the heat source of the heat exchanger is the hot water from the solar energy circulation pipeline, the cold source of the heat exchanger is the cooling water from the cooling water circulation pipeline, and the hot water and the cooling water exchange heat in the heat exchanger.

As an improvement, the hot water inlet of the heat exchanger is connected to the inlet end of the solar circulation pipeline, the hot water outlet of the heat exchanger is connected to the outlet end of the solar circulation pipeline, the user water outlet pipe is connected to the user water pipeline between the outlet of the heat exchanger and the outlet end of the solar circulation pipeline, and a user water valve is provided on the user water outlet pipe.

As an improvement, a return valve is further provided between the solar energy circulation pipeline and the user water pipeline, and the return valve is arranged on the user water outlet pipe and the user water pipeline of the solar energy circulation pipeline.

As an improvement, the discharge pipeline is connected to the user water outlet pipe and the user water pipe of the return valve, and a discharge valve is arranged on the discharge pipeline.

As an improvement, a cooling water PID regulating valve is provided on the inlet pipeline of the cooling water circulation pipeline, and a check valve is provided on the outlet pipeline.

As an improvement, a throttle valve is installed between the inlet and outlet of the solar energy circulation pipeline to ensure the control of the water consumption of the solar energy circulation pipeline and the user water pipeline, which can effectively ensure the water consumption of the user.

As an improvement, the system also includes a temperature control unit, which is data-connected to the return valve, user water valve, discharge valve and cooling water PID regulating valve to control the opening and closing of the above valves in a linked manner.

As an improvement, a plurality of user water pipelines are provided.

As an improvement, when the user needs to use cooled injection water, the temperature control unit starts, the cooling water PID regulating valve opens to adjust the temperature of the injection water through the heat exchanger, and the discharge valve opens automatically, the user water valve and the return valve are closed, and the water that does not meet the temperature is discharged through the discharge valve. When the temperature reaches the use requirements, the discharge valve is closed, the user water valve is opened, and the user can use water normally; after use, the user water button is closed first, the corresponding user water valve and the cooling water PID regulating valve are closed, the heat exchanger temperature rises, and after reaching the solar energy circulation pipeline temperature, the discharge point button is closed and the corresponding discharge valve is closed.

Compared with the prior art, the present invention has the following advantages:

The present invention is provided with a discharge valve, which can ensure that the user's water consumption meets the requirements and avoids non-compliance with the requirements. At the same time, it can also ensure that when the user does not need water, the heat source in the circulation pipeline reaches the temperature requirement and is transported to the solar circulation pipeline, while ensuring that the water consumption of the next user meets the requirements.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a solar energy system according to the present invention.

FIG. 2 is a schematic diagram of a series-connected solar energy system according to the present invention.

DETAILED DESCRIPTION

The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

In this article, unless otherwise specified, “/” represents division, and “×” and “*” represent multiplication.

Figure 1 discloses a solar energy system with intelligent emission control. As shown in Figure 1, the solar energy system includes a solar energy circulation pipeline 1, a user water pipeline 2 and a cooling water circulation pipeline 3. The hot water flowing in the solar energy circulation pipeline 1 is heated by a solar thermal collector.

As an improvement, as shown in Fig. 2, a plurality of user water pipes 2 are provided. The plurality of water pipes 2 are preferably in a series structure.

The user water pipe 2 is connected in parallel with the solar energy circulation pipe 1, and its inlet 10 is connected to the inlet 11 of the solar energy circulation pipe 1, and its outlet 12 is connected to the outlet 13 of the solar energy circulation pipe 1. The user water pipe 2 is installed with a heat exchanger 4, a user water valve 5 and a discharge valve 6. The heat source of the heat exchanger 4 is the hot water from the solar energy circulation pipe 1. The cold source of the heat exchanger comes from the cooling water of the cooling water circulation pipe 3, and the hot water and the cooling water exchange heat in the heat exchanger.

As an improvement, the heat exchanger is a shell and tube heat exchanger, with the shell side and the tube side being the cold source and the heat source respectively.

As an improvement, a baffle is arranged in the shell side. As an improvement, the shell and tube heat exchanger is a horizontal shell and tube heat exchanger.

The baffles are arranged in the vertical direction, including a baffle located at the upper part and a baffle located at the lower part, and the upper baffles and the lower baffles are arranged at intervals; along the flow direction of the cold water in the shell side, the vertical height of the lower baffle extending upward from the bottom shell side inner wall gradually increases, and the vertical length of the upper baffle extending downward from the upper shell side inner wall gradually decreases.

During the research process, it was found that the heat exchange of the baffles of the traditional heat exchanger is uneven in the cross section in the direction of fluid flow. As the distance from the inlet increases, the density of the heat exchange cold water in the lower part of the shell is large, so the cold water body flows downward, which significantly increases the heat exchange cold water in the lower part. Therefore, it is necessary to design the heat exchange structure for improvement. The present invention changes the height of the upper baffle and the lower baffle along the flow direction of the fluid, so that the liquid in the shell gradually moves closer to the center as it flows, so that the heat exchange tubes around the shell and tube center strengthen the heat exchange, which changes the previous heat exchange method, enhances the heat exchange efficiency at different positions, makes the heat exchange uniform on the whole, and further achieves the purpose of enhancing heat transfer.

As an improvement, along the flow direction of the fluid in the shell side, the vertical height of the lower baffle extending upward from the bottom shell side inner wall gradually increases, and the vertical length of the upper baffle extending downward from the upper shell side inner wall gradually decreases. Through the above-mentioned amplitude changes, the overall heat exchange can be further uniform, and the purpose of enhancing heat transfer can be further achieved.

The hot water inlet 8 of the heat exchanger 4 is connected to the inlet end of the solar circulation pipeline 1, the hot water outlet 9 of the heat exchanger 4 is connected to the outlet end of the solar circulation pipeline 1, the user water outlet pipe is connected to the user water pipeline 2 between the outlet of the heat exchanger 4 and the outlet end of the solar circulation pipeline 1, and a user water valve 5 is arranged on the user water outlet pipe 14.

A return valve 7 is also provided between the solar energy circulation pipeline 1 and the user water pipeline 2 for communication. The return valve 7 is provided on the user water outlet pipe and the user water pipeline 2 of the solar energy circulation pipeline 1.

The discharge pipeline 15 is connected to the user water outlet pipe and the user water pipe 2 of the return valve 7, and is used to discharge water that does not meet the requirements. The discharge pipeline 15 is provided with a discharge valve 6.

A cooling water PID regulating valve 16 is provided on the inlet pipe 18 of the cooling water circulation pipe 3, and a check valve 4 is provided on the outlet pipe. Preferably, a throttle valve 17 is installed between the inlet and outlet of the solar circulation pipe 1, and the water consumption of the solar circulation pipe and the user water pipe is controlled by controlling the opening size of the throttle valve, which can effectively ensure the water consumption of the user.

The system also includes a temperature control unit, which is data-connected to one or more of the return valve 7, the user water valve 5, the discharge valve 6, the throttle valve 17 and the cooling water PID regulating valve 16 to control the opening and closing of the above valves in a linked manner.

The use process of the solar heat exchange system:

When the user needs to use the injection water after cooling, the temperature control unit starts, the cooling water PID regulating valve 16 opens to adjust the temperature of the injection water through the heat exchanger 4, and the discharge valve 6 opens automatically, the user water valve 5 and the return valve 7 are closed, and the water that does not meet the temperature is discharged through the discharge valve 6. When the temperature reaches the use requirements, the discharge valve 6 is closed, the user water valve 5 is opened, and the user can use water normally. After use, turn off the user water button first, and the corresponding user water valve 5 and the cooling water PID regulating valve 16 are closed. The temperature of the heat exchanger 4 rises, and after reaching the temperature of the solar circulation pipeline, the temperature control unit controls the discharge valve 6 to close.

The present invention is provided with a discharge valve, which can ensure that the user's water consumption meets the requirements and avoids non-compliance with the requirements. At the same time, it can also ensure that when the user does not need water, the heat source in the circulation pipeline reaches the temperature requirement and is transported to the solar energy circulation pipeline, while ensuring that the water consumption of the next user meets the requirements.

As an improvement, a temperature sensor is provided in the discharge pipeline 15 to detect the drainage temperature. If the drainage temperature is higher than a certain value, the water discharged from the drainage valve can enter the heat accumulator for heat storage. If the drainage temperature is lower than a certain value, it directly enters the solar collector for heating.

A temperature sensor is provided on the cooling water inlet pipeline, and the temperature sensor is connected to the temperature control system. As an improvement, the opening of the cooling water PID regulating valve 16 can be automatically adjusted according to the temperature T1 detected by the temperature sensor. When the detected temperature T1 drops, the automatic regulating valve reduces the flow rate, and when the detected temperature T1 rises, the automatic regulating valve increases the flow rate. Through the above intelligent control, the hot water temperature is ensured to remain constant after the heat exchanger is cooled, so as to achieve the purpose of energy saving.

The controller is equipped with a touch screen, through which the temperature of hot water output from the shell side of the heat exchanger after heat exchange can be set.

As an improvement, the heat exchanger 4 is a shell and tube heat exchanger, the tube-side fluid is cooling water, and the shell-side fluid is hot water in the solar energy pipeline.

As an improvement, the shell side and the tube side flow in countercurrent, and along the flow direction of the fluid in the tube side, the spacing of the baffle group increases continuously from the tube side inlet to the middle of the tube side. Then from the middle of the tube side to the tube side outlet, the spacing of the baffle group decreases continuously. Because in the countercurrent process, the heat exchange of the shell side and the tube side per unit length along the flow process of the fluid is relatively uniform, so that the overall heat exchange effect is the best. However, it was found in experiments and simulations that the heat exchange in the middle is significantly greater than the heat exchange at the tube side inlet and outlet. Therefore, by changing the spacing between the baffles, the heat exchange area between the tube side fluid in the baffle and the shell side fluid source also changes. Therefore, the uneven heat exchange is compensated by the change in area, thereby further improving the heat exchange efficiency.

As an improvement, along the flow direction of the fluid in the tube, from the tube entrance to the middle of the tube, the distance between the baffles increases. Then, from the middle of the tube to the tube exit, the distance between the baffles decreases. The above changes in the range can make the heat transfer per unit length of the entire fluid movement more uniform, further improving the heat transfer efficiency.

Although the present invention has been disclosed as above with preferred embodiments, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims (9)

1. The system comprises a solar circulating pipeline, a user water pipeline and a cooling water circulating pipeline, wherein hot water circulates in the solar circulating pipeline and is heated by a solar heat collector; the water supply pipeline of the user is connected in parallel with the solar energy circulating pipeline, the inlet of the water supply pipeline of the user is communicated with the inlet of the solar energy circulating pipeline, the outlet of the water supply pipeline of the user is communicated with the outlet of the solar energy circulating pipeline, the heat exchanger, the water supply valve of the user and the discharge valve are arranged on the water supply pipeline of the user, the heat source of the heat exchanger is hot water from the solar energy circulating pipeline, the cold source of the heat exchanger is cooling water from the cooling water circulating pipeline, and the hot water and the cooling water exchange heat in the heat exchanger.

2. The solar energy system of claim 1, wherein the hot water inlet of the heat exchanger is connected to the inlet end of the solar energy circulation line, the hot water outlet of the heat exchanger is connected to the outlet end of the solar energy circulation line, the user water outlet pipe is connected to the user water pipe between the outlet of the heat exchanger and the outlet end of the solar energy circulation line, and the user water outlet pipe is provided with a user water valve.

3. The solar energy system of claim 1, wherein a water return valve is further provided between the solar energy circulation line and the user water line, the water return valve being disposed on the user water line between the user water outlet pipe and the solar energy circulation line.

4. The solar energy system of claim 1, wherein the discharge line communicates with a user water line of the user outlet pipe and the water return valve, and wherein the discharge line is provided with a discharge valve.

5. The solar energy system of claim 1, wherein the cooling water circulation pipeline is provided with a cooling water PID regulating valve on an inlet pipeline and a check valve on an outlet pipeline.

6. The solar energy system of claim 1, wherein a throttle valve is installed between the inlet and the outlet of the solar energy circulation pipeline, so as to ensure the control of the water consumption of the solar energy circulation pipeline and the water consumption pipeline of the user, and effectively ensure the water consumption of the user.

7. The solar energy system of claim 1, further comprising a temperature control unit, wherein the temperature control unit is in data connection with the water return valve, the user water valve, the drain valve and the cooling water PID control valve for controlling the opening and closing of the valves in a coordinated manner.

8. The solar energy system of claim 1, wherein the user water line is provided in plurality.

9. The solar energy system of claim 1, wherein when the user uses the cooled water for injection, the temperature control unit is started, the cooling water PID regulating valve is opened to regulate the temperature of the water for injection through the heat exchanger, the discharge valve is automatically opened, the user water valve and the return valve are closed, the water which does not meet the temperature in the period is discharged through the discharge valve, and when the temperature reaches the use requirement, the discharge valve is closed, the user water valve is opened, and the user water can be normally used; after the use is finished, the user water button is closed, the corresponding user water valve and the cooling water PID regulating valve are closed, the temperature of the heat exchanger rises, the discharging point button is closed after the temperature of the solar energy circulating pipeline is reached, and the corresponding discharging valve is closed.