CN221222808U - Solar energy cross-season soil heat storage and heating system - Google Patents
Solar energy cross-season soil heat storage and heating system Download PDFInfo
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- CN221222808U CN221222808U CN202323183486.0U CN202323183486U CN221222808U CN 221222808 U CN221222808 U CN 221222808U CN 202323183486 U CN202323183486 U CN 202323183486U CN 221222808 U CN221222808 U CN 221222808U
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- 238000005338 heat storage Methods 0.000 title claims abstract description 47
- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 239000002689 soil Substances 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 105
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000001932 seasonal effect Effects 0.000 claims 3
- 238000009529 body temperature measurement Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Abstract
The utility model belongs to building heating and energy-saving and emission-reduction facilities, and particularly relates to a solar energy cross-season soil heat storage and heating system. Solar energy resources are fully utilized, high-temperature water prepared by the solar heat collector is subjected to heat exchange with soil through a buried pipe heat exchanger in non-heating seasons such as northern spring, summer and autumn, so that the soil temperature is improved, and heat is stored in underground soil; during winter heating, the heat stored in the soil is extracted through the ground heat exchanger, and the heat is directly supplied through the heat supply system. The utility model effectively solves the problems of low guarantee rate of solar direct heating, low efficiency of a soil source heat pump system and the like in the prior art, and has the advantages of effectively storing idle solar energy in spring, summer and autumn, supplying heat for a heat supply terminal in winter, realizing zero auxiliary energy heat supply, having low running cost and the like.
Description
Technical Field
The utility model belongs to building heating and energy-saving and emission-reducing facilities, and particularly relates to application of a solar energy cross-season soil heat storage and heating system in cross-season heat storage and heating.
Background
In the northern area clean heating, various heating modes are combined according to local conditions, so that the clean energy heating technology with low energy consumption, low cost and high reliability can be further developed to replace the traditional coal burning clean energy heating technology, wherein the solar heating technology is one of the technologies which have great prospects and are widely researched and applied.
Under the background of rich solar energy resources in China, how to effectively utilize the solar energy resources for daily life service is an important way for relieving unbalance of energy consumption structures in China, solving the problem of environmental deterioration and realizing sustainable development of economy and society.
At present, solar photo-thermal utilization is mainly used for preparing hot water in summer and auxiliary heating in winter, and at present, one of the problems encountered in the development of a solar heating system is that the building heating load is far greater than the domestic hot water load, solar radiation is excessive in spring, summer and autumn, and solar radiation is insufficient in winter, so that a large amount of heat generated by the solar heat collecting system in summer cannot be utilized, and the solar direct heating guarantee rate is very low. Therefore, solar energy cross-season heat storage heating becomes a key for efficiently utilizing solar energy for heating.
The soil source heat pump technology becomes an important support technology in the sustainable energy utilization mode. However, in the long-time running process of the system, the temperature of the surrounding soil is unbalanced due to continuous heat taking or heat releasing of the buried pipe heat exchanger, so that the inlet temperature of the evaporator or the inlet temperature of the condenser of the unit is too low, the COP of the unit is reduced, and the efficiency of the system is reduced. In addition, the development of the soil source heat pump is limited to a certain extent due to the limited laying area of the buried pipes.
Disclosure of Invention
The utility model aims to provide a solar energy cross-season soil heat storage and heating system, which fully utilizes solar energy resources, exchanges heat between high-temperature water prepared by a solar heat collector and soil through a buried pipe heat exchanger in non-heating seasons such as northern spring, summer, autumn and the like, improves the temperature of the soil and stores the heat in underground soil; during winter heating, the heat stored in the soil is extracted through the ground heat exchanger, and the heat is directly supplied through the heat supply system.
The utility model has the following overall technical concept:
The solar energy cross-season soil heat storage heating system comprises a solar heat collector and a buffer water tank communicated with the solar heat collector through a pipeline and a solar heat collection circulating pump, wherein the buffer water tank is communicated with a heat supply terminal through a heat supply circulating pump and a pipeline, a first temperature sensor for monitoring the temperature of an internal working medium is arranged outside the solar heat collector, a second temperature sensor for monitoring the temperature of the internal working medium is arranged outside the buffer water tank, a control device receives temperature signals acquired by the first temperature sensor and the second temperature sensor, and the start and the stop of the heat supply circulating pump and/or the solar heat collection circulating pump are controlled according to the heat supply terminal requirement and a comparison result of a temperature measured value and a set value; the device also comprises a buried pipe heat exchanger arranged in the soil heat storage pool, the buffer water tank is grounded through a working medium input pipeline to the input end of the buried pipe heat exchanger, the working medium input pipeline is divided into two paths, one path consists of a heat storage circulating pump, a control valve and a pipeline, and the other path consists of the control valve and the pipeline; the output end of the ground buried pipe heat exchanger is communicated with the buffer water tank through a working medium output pipeline, the working medium output pipeline is divided into two paths, one path consists of a heat-taking circulating pump 7, a control valve and a pipeline, and the other path consists of the control valve and the pipeline; and the control device controls the heat storage circulating pump or the heat taking circulating pump to be started and stopped according to the comparison result of the temperature measured value of the buffer water tank 2 and the set value.
The specific technical concept of the utility model is as follows:
The working medium input pipeline is divided into two paths, one path is composed of a heat storage circulating pump, a second valve and a pipeline, and the other path is composed of a first valve and a pipeline; the output end of the ground heat exchanger is communicated with the buffer water tank through a working medium output pipeline, the working medium output pipeline is divided into two paths, one path is composed of a heat-taking circulating pump, a fourth valve and a pipeline, and the other path is composed of a third valve and a pipeline.
In the engineering of a ground-source heat pump system, a ground-buried pipe heat exchange device consists of a plurality of vertical buried pipe heat exchange U-shaped pipes (hundreds of pipes in common engineering), and the vertical buried pipe heat exchange U-shaped pipes can be connected with a main circulation pipeline through a water collecting and distributing device. In order to ensure that working medium (water) uniformly distributes and circularly flows in each vertical buried pipe heat exchange U-shaped pipe, the preferred technical implementation means is that the working medium input pipeline is grounded to the input end of the buried pipe heat exchanger through the first water collecting and distributing device, and the output end of the buried pipe heat exchanger is connected with the working medium output pipeline through the second water collecting and distributing device.
In order to meet the requirements of the consumption of working media in the system and the stable operation of the system, the preferable technical implementation means is that the system also comprises a water supplementing device, and the material output end of the water supplementing device is communicated with the buffer water tank through a pipeline and a control valve.
The application method of the solar energy cross-season soil heat storage and heating system in cross-season heat storage and heating is as follows:
A. heat storage stage
Soil heat Chi Xure is used in spring, summer and autumn; the method comprises the following steps:
a1, normally closing a heat taking circulating pump and a heat supply circulating pump, closing a first valve and a fourth valve, and opening a second valve and a third valve;
A2, outputting hot water to a buffer water tank by the solar heat collector, and starting a heat storage circulating pump to heat Chi Xure the soil when the water temperature detected by the second temperature sensor reaches a set value; when the second temperature sensor detects that the water temperature is lower than the set value, the heat storage circulating pump is turned off to stop heating Chi Xure the soil;
A3, the solar heat collector and the buffer water tank perform temperature difference circulation, when the temperature difference between the first temperature sensor and the second temperature sensor is larger than a set value, the solar heat collection circulating pump is started, and when the temperature difference between the first temperature sensor and the second temperature sensor is smaller than the set value, the solar heat collection circulating pump is closed;
A4, circulating the buffer water tank and the buried pipe heat exchanger at a constant temperature, and when the water temperature detected by the second temperature sensor reaches a set value, starting a heat storage circulating pump, wherein hot water in the buffer water tank enters the buried pipe heat exchanger through the first water collecting and distributing device and heats Chi Xure to soil; when the second temperature sensor detects that the water temperature does not reach the set value, the heat storage circulating pump is closed;
B. Heating stage
The winter is a heating stage, and specifically comprises the following steps:
b1, the heat storage circulating pump is normally closed, the first valve and the fourth valve are opened, and the second valve and the third valve are closed;
B2, the solar heat collector outputs hot water to the buffer water tank, when the second temperature sensor detects that the water temperature is smaller than a set value, the heat taking circulating pump is started, the soil heat pool releases heat to the buffer water tank, and the system starts the heat supplying circulating pump to supply heat according to the requirement of the heat supplying terminal 3;
B3, the solar heat collector and the buffer water tank circulate at a constant temperature, and when the temperature value measured by the first temperature sensor is greater than a set value, the solar heat collection circulating pump is started; when the temperature value measured by the first temperature sensor is smaller than a set value, the solar heat collection circulating pump is turned off;
And B4, circulating the buffer water tank and the ground heat exchanger at a constant temperature, when the second temperature sensor detects that the water temperature does not reach the set value, starting the heat taking circulating pump, enabling water in the buffer water tank to enter the ground heat exchanger through the first water collecting and distributing device and absorb heat stored in the soil heat pool, and returning the water in the buffer water tank through the second water collecting and distributing device, so that the water in the buffer water tank is circularly heated until the water temperature detected by the second temperature sensor reaches the set value, and closing the heat taking circulating pump.
In order to facilitate the system to realize effective control according to the heating temperature, the preferred technical implementation means is that the system in the step B2 controls the start and stop of the heating circulating pump according to the heating terminal demand for the heating temperature set value.
The comparison result of the measured temperature or temperature difference value and the set value is the direct basis for the system to control the effective starting and working state switching of each valve, the confirmation of the set value is different according to the latitude, altitude, sunlight, consumption requirement and the like of the system, and the preferred technical implementation means is that the solar heat collection circulating pump is started when the temperature difference between the first temperature sensor and the second temperature sensor in the step A3 is more than or equal to 8 ℃, and the solar heat collection circulating pump is closed when the temperature difference between the first temperature sensor and the second temperature sensor is less than or equal to 3 ℃.
Furthermore, when the second temperature sensor detects that the water temperature is more than or equal to 60 ℃ in the step A4, the heat storage circulating pump is started; and when the second temperature sensor detects that the water temperature is less than or equal to 50 ℃, the heat storage circulating pump is closed.
Further, when the temperature value measured by the first temperature sensor in the step B3 is more than or equal to 55 ℃, the solar heat collection circulating pump is started, and when the temperature value measured by the first temperature sensor is less than or equal to 45 ℃, the solar heat collection circulating pump is closed; in the step B4, when the water temperature detected by the second temperature sensor is less than or equal to 35 ℃, the heat taking circulating pump is started, and when the water temperature detected by the second temperature sensor is more than or equal to 45 ℃, the heat taking circulating pump is closed.
The applicant needs to say that:
In the description of the present utility model, the positional or positional relationship indicated by the terms "inside", "outside", "output", "input", etc. are based on the positional or positional relationship shown in the drawings, and are merely for the purpose of simplifying the description of the present utility model, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The technical progress of the utility model is that:
1. The system adopts the structural design of arranging the ground pipe laying heat exchanger and the soil heat storage pool, can effectively store idle solar energy in spring, summer and autumn, supplies heat for a heat supply terminal in winter, is particularly suitable for hot summer in north and cold winter climates, can realize high-temperature heat storage of the soil heat storage pool along with long-term operation of the system, has higher soil temperature after high-temperature heat storage in heating season, and can utilize a ground pipe laying to take heat from soil to directly supply heat. The solar energy guarantee rate is improved year by year, and can reach more than 95% finally. Zero auxiliary energy heating can be realized, and the operation cost is extremely low.
2. The temperature sensor and the control device are adopted for structural design, and the measured value of the temperature is compared with the set value to be used as a necessary condition for switching the working state of the control system, so that the automatic control for switching the working state of the system can be effectively realized, and the differential setting is convenient according to different regional climate conditions, so that the application range is wide.
3. The structural design of the first water collector and the second water collector is adopted, so that the working medium (water) can be uniformly distributed and circularly flow.
4. The structural design of the water supplementing device can supplement the consumption of the working medium so as to meet the requirement of long-term stable operation of the system.
Drawings
The drawings of the utility model are as follows:
Fig. 1 is a schematic view of the structure of the device of the present utility model.
Reference numerals in the drawings are as follows:
1. A solar collector; 2. a buffer water tank; 3. a heating terminal; 4. a soil heat storage pool; 5. a solar heat collection circulation pump; 6. a heat storage circulation pump; 7. a heat-taking circulating pump; 8. a heat supply circulation pump; 9. a first valve; 10. a second valve; 11. a third valve; 12. a fourth valve; 13. a first temperature sensor; 14. a second temperature sensor; 15A, a first water collecting and distributing device; 15B, a second water collecting and distributing device; 16. a buried pipe heat exchanger.
Detailed Description
The present utility model will be further described with reference to the following examples, but should not be construed as limiting the utility model, and the scope of the utility model is defined by the appended claims, and any equivalents thereof may be substituted according to the description without departing from the scope of the utility model.
The integral structure of the embodiment is as shown in the figure, the solar energy cross-season soil heat storage and heating system comprises a solar heat collector 1 and a buffer water tank 2 communicated with the solar heat collector through a pipeline and a solar heat collection circulating pump 5, wherein the buffer water tank 2 is communicated with a heat supply terminal 3 through a heat supply circulating pump 8 and the pipeline, a first temperature sensor 13 for monitoring the temperature of an internal working medium is arranged outside the solar heat collector 1, a second temperature sensor 14 for monitoring the temperature of the internal working medium is arranged outside the buffer water tank 2, a control device receives temperature signals acquired by the first temperature sensor 13 and the second temperature sensor 14, and the opening and closing of the heat supply circulating pump 8 and/or the solar heat collection circulating pump 5 are controlled according to the requirement of the heat supply terminal 3 and the comparison result of the temperature measured value and a set value; the device also comprises a buried pipe heat exchanger 16 arranged in the soil heat storage pool 4, wherein the buffer water tank 2 is grounded through a working medium input pipeline and a first water collecting and distributing device 15A, the input end of the buried pipe heat exchanger 16 is connected with two paths of working medium input pipelines, one path of working medium input pipeline consists of a heat storage circulating pump 6, a second valve 10 and a pipeline, and the other path consists of a first valve 9 and a pipeline; the output end of the ground heat exchanger 16 is communicated with the buffer water tank 2 through a second water collecting and distributing device 15B and a working medium output pipeline, wherein the working medium output pipeline is divided into two paths, one path consists of a heat-taking circulating pump 7, a fourth valve 12 and a pipeline, and the other path consists of a third valve 11 and a pipeline; the control device controls the heat accumulating circulating pump 6 or the heat taking circulating pump 7 to be started and stopped according to the comparison result of the temperature measured value of the buffer water tank 2 and the set value.
The water replenishing device is further arranged, and the material output end of the water replenishing device is communicated with the buffer water tank 2 through a pipeline and a control valve.
The application of the solar energy in the cross-season heat storage and heating of the cross-season soil heat storage and heating system comprises the following steps:
A. heat storage stage
The heat is stored in the soil heat pool 4 in spring, summer and autumn; the method comprises the following steps:
A1, normally closing a heat taking circulating pump 7 and a heat supply circulating pump 8, closing a first valve 9 and a fourth valve 12, and opening a second valve 10 and a third valve 11;
A2, the solar heat collector 1 outputs hot water to the buffer water tank 2, and when the second temperature sensor 14 detects that the water temperature reaches a set value, the heat storage circulating pump 6 is started to store heat to the soil heat pool 4; when the second temperature sensor 14 detects that the water temperature is lower than the set value, the heat storage circulating pump 6 is closed to stop heat storage to the soil heat pool 4;
A3, the solar heat collector 1 and the buffer water tank 2 circulate in a temperature difference mode, the solar heat collection circulating pump 5 is started when the temperature difference between the first temperature sensor 13 and the second temperature sensor 14 is more than or equal to 8 ℃, and the solar heat collection circulating pump 5 is closed when the temperature difference between the first temperature sensor 13 and the second temperature sensor 14 is less than or equal to 3 ℃;
A4, circulating the buffer water tank 2 and the buried pipe heat exchanger 16 at a constant temperature, and starting the heat storage circulating pump 6 when the second temperature sensor 14 detects that the water temperature is more than or equal to 60 ℃; hot water in the buffer water tank 2 enters the buried pipe heat exchanger 16 through the first water collecting and distributing device 15A and stores heat to the soil heat pool 4; when the second temperature sensor 14 detects that the water temperature is less than or equal to 50 ℃, the heat storage circulating pump 6 is turned off;
B. Heating stage
The winter is a heating stage, and specifically comprises the following steps:
B1, the heat accumulating circulating pump 6 is normally closed, the first valve 9 and the fourth valve 12 are opened, and the second valve 10 and the third valve 11 are closed;
b2, the solar heat collector 1 outputs hot water to the buffer water tank 2, when the second temperature sensor 14 detects that the water temperature is smaller than a set value, the heat taking circulating pump 7 is started, the soil heat pool 4 releases heat to the buffer water tank 2, and the system starts the heat supplying circulating pump 8 to supply heat according to the requirement of the heat supplying terminal 3;
B3, circulating the solar heat collector 1 and the buffer water tank 2 at a constant temperature, starting the solar heat collection circulating pump 5 when the temperature value measured by the first temperature sensor 13 is more than or equal to 55 ℃, and closing the solar heat collection circulating pump 5 when the temperature value measured by the first temperature sensor 13 is less than or equal to 45 ℃;
B4, the buffer water tank 2 and the buried pipe heat exchanger 16 circulate at a constant temperature, when the second temperature sensor 14 detects that the water temperature is less than or equal to 35 ℃, the heat taking circulating pump 7 is started, water in the buffer water tank 2 enters the buried pipe heat exchanger 16 through the first water collecting and distributing device 15A and absorbs heat stored in the soil heat pool 4, and then returns to the buffer water tank 2 through the second water collecting and distributing device 15B, so that the water in the buffer water tank 2 is circularly heated until the water temperature detected by the second temperature sensor 14 is more than or equal to 45 ℃, and the heat taking circulating pump 7 is closed.
In the step B2, the system controls the start and stop of the heat supply circulating pump 8 according to the requirement of the heat supply terminal 3 on the heating temperature set value.
Claims (4)
1. The solar energy cross-season soil heat storage heating system comprises a solar heat collector (1) and a buffer water tank (2) communicated with the solar heat collector through a pipeline and a solar heat collection circulating pump (5), wherein the buffer water tank (2) is communicated with a heat supply terminal (3) through a heat supply circulating pump (8) and the pipeline, a first temperature sensor (13) for monitoring the temperature of an internal working medium is arranged outside the solar heat collector (1), a second temperature sensor (14) for monitoring the temperature of the internal working medium is arranged outside the buffer water tank (2), a control device receives temperature signals acquired by the first temperature sensor (13) and the second temperature sensor (14), and the start and stop of the heat supply circulating pump (8) and/or the solar heat collection circulating pump (5) are controlled according to the requirement of the heat supply terminal (3) and the comparison result of the temperature measurement value and a set value; the device is characterized by further comprising a buried pipe heat exchanger (16) arranged in the soil heat storage pool (4), wherein the buffer water tank (2) is grounded through a working medium input pipeline to the input end of the buried pipe heat exchanger (16), the working medium input pipeline is divided into two paths, one path consists of a heat storage circulating pump (6), a control valve and a pipeline, and the other path consists of the control valve and the pipeline; the output end of the ground heat exchanger (16) is communicated with the buffer water tank (2) through a working medium output pipeline, the working medium output pipeline is divided into two paths, one path consists of a heat-taking circulating pump (7), a control valve and a pipeline, and the other path consists of the control valve and the pipeline; the control device controls the on-off of the heat storage circulating pump (6) or the heat taking circulating pump (7) according to the comparison result of the temperature measured value of the buffer water tank (2) and the set value.
2. The solar seasonal soil heat storage and heating system according to claim 1 is characterized in that the working medium input pipeline is divided into two paths, one path is composed of a heat storage circulating pump (6), a second valve (10) and a pipeline, and the other path is composed of a first valve (9) and a pipeline; the output end of the ground heat exchanger (16) is communicated with the buffer water tank (2) through a working medium output pipeline, the working medium output pipeline is divided into two paths, one path is composed of a heat-taking circulating pump (7), a fourth valve (12) and a pipeline, and the other path is composed of a third valve (11) and a pipeline.
3. The solar seasonal soil heat storage and heating system according to claim 1 or 2, wherein the working medium input pipeline is grounded to the input end of the buried pipe heat exchanger (16) through a first water collecting and distributing device (15A), and the output end of the buried pipe heat exchanger (16) is connected to the working medium output pipeline through a second water collecting and distributing device (15B).
4. The solar seasonal soil heat storage and heating system according to claim 1, further comprising a water supplementing device, wherein the material output end of the water supplementing device is communicated with the buffer water tank (2) through a pipeline and a control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323183486.0U CN221222808U (en) | 2023-11-24 | 2023-11-24 | Solar energy cross-season soil heat storage and heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323183486.0U CN221222808U (en) | 2023-11-24 | 2023-11-24 | Solar energy cross-season soil heat storage and heating system |
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| CN221222808U true CN221222808U (en) | 2024-06-25 |
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| CN202323183486.0U Active CN221222808U (en) | 2023-11-24 | 2023-11-24 | Solar energy cross-season soil heat storage and heating system |
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| Country | Link |
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| CN (1) | CN221222808U (en) |
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2023
- 2023-11-24 CN CN202323183486.0U patent/CN221222808U/en active Active
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