System for testing heat gain of solar water heater through drainage method
Through the combination of automated testing processes and high-precision sensor modules, the problems of low efficiency and poor accuracy of traditional testing methods are solved, and the efficiency and accuracy of thermal testing of solar water heaters are achieved, and it is suitable for various types of solar water heaters.
Patent Information
- Application Number
- CN202420791877.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The traditional thermal testing method of solar water heaters relies on manual operation, is inefficient and susceptible to environmental and human factors, resulting in low accuracy of the test results.
A solar water heater heat drainage test system was designed, and an automated test process was adopted. Through high-precision flow sensors, temperature sensors and advanced data processing algorithm modules, combined with the PID algorithm program module, the precision flow solenoid valve is automatically controlled to realize the automated test process. , ensure the accuracy and reliability of test results.
It greatly shortens the test cycle, improves the testing efficiency, ensures the accuracy and reliability of the test results. It is suitable for thermal testing of different types and specifications of solar water heaters, and has a wide range of application prospects.
Smart Images
Figure CN222210825U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of solar water heater performance testing, and in particular to a solar water heater heat gain and water discharge method testing system. Background Art
[0002] With the increasing awareness of environmental protection and the widespread application of renewable energy, solar water heaters have attracted widespread attention due to their energy-saving and environmentally friendly characteristics.
[0003] After searching, the Chinese patent with application number: 201920850294.5 discloses a thermal performance monitoring system for a household solar water heater, including a solar water heater and a thermal performance monitoring system arranged on the solar water heater, the solar water heater is composed of a solar collector and a hot water storage tank connected to the solar collector, the thermal performance monitoring system includes a thermal performance test circuit and a data acquisition and processing host computer; the thermal performance test circuit includes a real-time thermal performance test circuit, a thermal collection system daily thermal performance test circuit and a collector daily thermal performance test circuit; the monitoring method includes four parts: pre-experimental state setting, real-time thermal performance monitoring, thermal collection system daily thermal performance test and collector daily thermal performance test.
[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following technical defects that need to be improved:
[0005] Traditional heat gain testing methods and equipment often rely on manual operation, which is not only inefficient but also easily affected by environmental factors and human operation, resulting in low accuracy of test results. Utility Model Content
[0006] The present application provides a solar water heater heat gain and water discharge method test system to improve the following technical problems:
[0007] Traditional heat gain testing methods and equipment often rely on manual operation, which is not only inefficient but also easily affected by environmental factors and human operation, resulting in low accuracy of test results.
[0008] The present application provides a solar water heater heat gain and water discharge method test system, which adopts the following technical solutions:
[0009] A solar water heater heat gain and water discharge method test system comprises a solar water heater water tank, wherein the inlet and outlet of the solar water heater water tank are connected with a circulation pipeline, wherein the circulation pipeline is provided with an inlet water temperature sensor, an outlet water temperature sensor, a temperature regulating circulation pump and a flow switch, wherein the circulation pipeline is also connected with a first branch and a second branch in parallel, wherein the first branch is provided with a first solenoid valve, wherein the second branch is provided with a heat exchanger, a first electric heater and a second solenoid valve, wherein the heat exchanger is connected with a refrigerator, wherein a recovery water pipe is connected between the outlet water temperature sensor and the flow switch, wherein a third solenoid valve is provided on the recovery water pipe, wherein a water supply pipe is provided between the inlet water temperature sensor and the temperature regulating circulation pump, wherein one end of the water supply pipe away from the solar water heater water tank is connected with a constant temperature and pressure water tank, wherein a regulating pump, a water meter, an adjustable valve, a water supply temperature sensor, a second electric heater and a fourth solenoid valve are also provided in sequence on the water supply pipe, wherein a drainage pipe is connected between the second electric heater and the fourth solenoid valve, wherein a drainage solenoid valve is provided on the drainage pipe.
[0010] In an achievable technical solution of the present application, the adjustable valve is a precision flow solenoid valve that is automatically controlled by a PID algorithm program module.
[0011] In a feasible technical solution of the present application, the heat exchanger is a plate heat exchanger.
[0012] In an achievable technical solution of the present application, both the first electric heater and the second electric heater are single-phase electric heaters, and the power of the single-phase electric heaters is between 1.3-1.7 kW.
[0013] In an achievable technical solution of the present application, the regulating pump is a three-phase flow regulating water pump.
[0014] In an achievable technical solution of the present application, the capacity tonnage of the constant temperature and constant pressure water tank is between 3-5T, and a water outlet flow regulating module and a water outlet temperature regulating module are installed inside the constant temperature and constant pressure water tank.
[0015] In an achievable technical solution of the present application, the initial water temperature of the solar water heater water tank is 20±0.2°C, and the initial water temperature of the constant temperature and constant pressure water tank is controlled at 20±1°C.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] An automated testing process can be used for testing, which can greatly shorten the test cycle and improve test efficiency. Various high-precision flow sensors, temperature sensors and advanced data processing algorithm modules can be used to comprehensively control the adjustable valve for automatic regulation, thereby ensuring the accuracy and reliability of the test results. The entire system can also be applied to heat gain tests of solar water heaters of different types and specifications, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 It is a schematic diagram of the principle of a solar water heater heat gain and water discharge method testing system in an embodiment of the present application.
[0020] Description of reference numerals:
[0021] 1. Solar water heater tank; 2. Inlet water temperature sensor; 3. Outlet water temperature sensor; 4. Thermostatic circulation pump; 5. Flow switch; 6. First solenoid valve; 7. Heat exchanger; 8. First electric heater; 9. Second solenoid valve; 10. Refrigerator; 11. Third solenoid valve; 12. Constant temperature and pressure water tank; 13. Regulating pump; 14. Water meter; 15. Adjustable valve; 16. Water supply temperature sensor; 17. Second electric heater; 18. Fourth solenoid valve; 19. Drain solenoid valve. DETAILED DESCRIPTION
[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0026] The following is combined with Figure 1 This application is described in further detail.
[0027] The present application embodiment discloses a solar water heater heat gain and water discharge method test system. Figure 1 A solar water heater heat gain and drainage method test system comprises a solar water heater tank 1, the inlet and outlet of the solar water heater tank 1 are connected with a circulation pipeline, the circulation pipeline is provided with an inlet water temperature sensor 2, an outlet water temperature sensor 3, a temperature regulating circulation pump 4 and a flow switch 5, the circulation pipeline is also connected with a first branch and a second branch in parallel, the first branch is provided with a first solenoid valve 6, the second branch is provided with a heat exchanger 7, a first electric heater 8 and a second solenoid valve 9, the heat exchanger 7 is connected with a refrigerator 10, the outlet water temperature sensor 3 and the flow switch 5 are connected with a first branch and a second branch are connected ... first branch is provided with a first solenoid valve 6, the second branch is provided with a heat exchanger 7, a first electric heater 8 and a second solenoid valve 9, the heat exchanger 7 is connected with a refrigerator 10, the outlet water temperature sensor 3 and the flow switch 5 are connected with a first branch and a second branch are connected with a first branch and a second branch are connected with a first branch and a second branch are connected with a first branch and a second branch are connected with a first branch and a second branch. A recovery water pipe is connected between the switches 5, and a third solenoid valve 11 is arranged on the recovery water pipe. A water supply pipe is arranged between the inlet water temperature sensor 2 and the temperature regulating circulation pump 4. The end of the water supply pipe away from the solar water heater tank 1 is connected to a constant temperature and pressure water tank 12. A regulating pump 13, a water meter 14, an adjustable valve 15, a water supply temperature sensor 16, a second electric heater 17 and a fourth solenoid valve 18 are arranged in sequence on the water supply pipe. A drain pipe is connected between the second electric heater 17 and the fourth solenoid valve 18, and a drain solenoid valve 19 is arranged on the drain pipe.
[0028] The adjustable valve 15 is a precision flow solenoid valve automatically controlled by a PID algorithm program module, the heat exchanger 7 is a plate heat exchanger, the first electric heater 8 and the second electric heater 17 are both single-phase electric heaters, the power of the single-phase electric heater is between 1.3-1.7KW, the regulating pump 13 is a three-phase flow regulating water pump, the capacity tonnage of the constant temperature and pressure water tank 12 is between 3-5T, and the constant temperature and pressure water tank 12 is internally installed with a water outlet flow regulating module and a water outlet temperature regulating module, the initial water temperature of the solar water heater tank 1 is 20±0.2℃, and the initial water temperature of the constant temperature and pressure water tank 12 is controlled at 20±1℃.
[0029] The use process of a solar water heater heat gain and water discharge method test system according to an embodiment of the present application is roughly as follows:
[0030] Before the daily heat gain test (drainage method) begins, the initial water temperature inside the solar water heater to be tested is controlled at 20±0.2℃, and the water is mixed evenly;
[0031] During the initial water temperature control, the temperature regulating circulation pump 4 is turned on, the second solenoid valve 9 is turned on, and the first solenoid valve 6 is closed. When the flow switch 5 indicates that there is flow, the control program module activates the PID algorithm program, and uses the first electric heater 8 and the refrigerator 10 to work simultaneously, thereby performing initial temperature adjustment on the water temperature inside the solar water heater tank 1;
[0032] After the initial temperature adjustment is completed, the solar water heater absorbs sunlight and heats up for 8 hours before starting the drainage method test;
[0033] Before the drainage method test, the initial water temperature inside the constant temperature and constant pressure water tank 12 is controlled at 20±1°C, and the water is mixed evenly;
[0034] Before the drainage method test, open the flow regulating pump 13, open the drainage solenoid valve 19, and drain the water to the outside first. The control program module enables the PID algorithm program to adjust the size of the adjustable valve 15 to control the pipeline flow at 500L / h. When the temperature monitored by the water supply temperature sensor 16 is stable (the fluctuation does not exceed ±0.2℃ for 1min), close the drainage solenoid valve 19, open the third solenoid valve 11 and the fourth solenoid valve 18, and keep the first solenoid valve 6 closed to start the drainage method test;
[0035] During the drainage process, the temperature data of the inlet water temperature sensor 2 and the outlet water temperature sensor 3, as well as the flow data of the water meter 14 are recorded. During the test, although the regulating pump 13 and the constant temperature and pressure water tank 12 have the ability to adjust the flow and water temperature respectively, in order to ensure the stability of the flow and temperature, the adjustable valve 15 and the second electric heater 17 will fine-tune the flow and temperature respectively according to the real-time values of the flow meter 14 and the water supply temperature sensor 16. During the test, the temperature at the inlet water temperature sensor 2 should be constant at 20±0.2℃, and the temperature at the outlet water temperature sensor 3 should gradually decrease. When the temperature difference between the inlet water temperature sensor 2 and the outlet water temperature sensor 3 is less than 0.5℃, the drainage test is stopped, the flow regulating pump 13, the adjustable valve 15, the third solenoid valve 11 and the fourth solenoid valve 18 are closed, and the cumulative drainage heat data is calculated.
[0036] The beneficial technical effects of a solar water heater heat gain and water discharge method test system according to the embodiment of the present application are as follows:
[0037] An automated testing process can be used for testing, which can greatly shorten the test cycle and improve the test efficiency. Various high-precision flow sensors, temperature sensors and advanced data processing algorithm modules can be used to comprehensively control the adjustable valve 15 for automatic regulation, thereby ensuring the accuracy and reliability of the test results. The entire system can also be applied to heat gain tests of solar water heaters of different types and specifications, and has broad application prospects.
[0038] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.
Claims
1. A solar water heater heat gain and water discharge method test system, characterized in that: The invention comprises a solar water heater tank (1), wherein the inlet and outlet of the solar water heater tank (1) are connected to a circulation pipeline, wherein the circulation pipeline is provided with an inlet water temperature sensor (2), an outlet water temperature sensor (3), a temperature regulating circulation pump (4) and a flow switch (5), wherein the circulation pipeline is also connected in parallel with a first branch and a second branch, wherein the first branch is provided with a first electromagnetic valve (6), and the second branch is provided with a heat exchanger (7), a first electric heater (8) and a second electromagnetic valve (9), wherein the heat exchanger (7) is connected to a refrigerator (10), and a recycling device (11) is connected between the outlet water temperature sensor (3) and the flow switch (5). A water pipe, a third solenoid valve (11) is arranged on the water recovery pipe, a water supply pipe is arranged between the inlet water temperature sensor (2) and the temperature regulating circulation pump (4), one end of the water supply pipe away from the solar water heater tank (1) is connected to a constant temperature and pressure water tank (12), a regulating pump (13), a water meter (14), an adjustable valve (15), a water supply temperature sensor (16), a second electric heater (17) and a fourth solenoid valve (18) are arranged on the water supply pipe in sequence, a drainage pipe is connected between the second electric heater (17) and the fourth solenoid valve (18), and a drainage solenoid valve (19) is arranged on the drainage pipe.
2. A solar water heater heat gain and water discharge method test system according to claim 1, characterized in that: The adjustable valve (15) is a precision flow electromagnetic valve that is automatically controlled by a PID algorithm program module.
3. A solar water heater heat gain and water discharge method test system according to claim 1, characterized in that: The heat exchanger (7) is a plate heat exchanger.
4. A solar water heater heat gain and water discharge method test system according to claim 1, characterized in that: The first electric heater (8) and the second electric heater (17) are both single-phase electric heaters, and the power of the single-phase electric heaters is between 1.3-1.7 kW.
5. A solar water heater heat gain and water discharge method test system according to claim 1, characterized in that: The regulating pump (13) is a three-phase flow regulating water pump.
6. A solar water heater heat gain and water discharge method test system according to claim 1, characterized in that: The capacity tonnage of the constant temperature and constant pressure water tank (12) is between 3 and 5 tons, and a water outlet flow regulating module and a water outlet temperature regulating module are installed inside the constant temperature and constant pressure water tank (12).
7. A solar water heater heat gain and water discharge method test system according to claim 1, characterized in that: The initial water temperature of the solar water heater water tank (1) is 20±0.2°C, and the initial water temperature of the constant temperature and constant pressure water tank (12) is controlled at 20±1°C.