CN114353352B - Solar heating system based on standby heat energy storage - Google Patents
Solar heating system based on standby heat energy storage Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention relates to a solar heating system, in particular to a solar heating system based on standby heat energy storage. It includes solar energy collection unit, collecting element, information acquisition unit and supplies out water control unit, solar energy collection unit includes solar collector, solar collector is used for gathering solar energy to convert heat energy into and carry to collecting element, collecting element includes main collecting tank and reserve collecting tank. According to the invention, a circulation pipeline is arranged between a main collection tank and a standby collection tank, one end of the circulation pipeline is provided with a water pump, the water pump is used for executing a water supply and outlet instruction of the main collection tank and a flow cutoff instruction of the standby collection tank, then the main collection tank is input into the standby collection tank for standby according to the instructions, the standby collection tank is of a double-layer structure, and a cavity formed between the double-layer structure is filled with a thermal insulation material, so that the heat dissipation speed of water is reduced, and the standby period is prolonged.
Description
Technical Field
The invention relates to a solar heating system, in particular to a solar heating system based on standby heat energy storage.
Background
Solar energy is a renewable energy source. Refers to the heat radiation energy of the sun (see three ways of heat energy transmission: radiation), which is mainly expressed by the solar ray, and is generally used for generating electricity or providing energy for a water heater in modern times.
A solar collector is a device that converts the radiant energy of the sun into thermal energy. Since solar energy is relatively dispersed and must be collected somehow, the heat collector is a key part of various solar energy utilization devices. Due to different purposes, the heat collectors and the types of systems matched with the heat collectors are classified into a plurality of types and names, such as solar cookers for cooking, solar water heaters for producing hot water, solar dryers for drying articles, solar furnaces for melting metal, solar houses, solar thermal power stations, solar seawater desalinizers and the like.
Chinese patent publication no: CN204693586U discloses a solar environment-friendly heat supply system, which comprises a solar heat collector, a rotating device, a heat collector fixing device, a phase change heat accumulator, a heat storage water tank, a heat exchanger and a standby heating device, wherein the heat collector fixing device is arranged below the solar heat collector, and the rotating device is arranged between the heat collector fixing device and the solar heat collector. It is equipped with rotating device in solar collector's below, utilizes the photoelectric sensor on the rotating device to detect the sunlight, and then adjusts rotating device and rotate, drives solar collector and rotates along with the light for shine the sunlight all the time above the solar collector, and then improve the utilization ratio of solar energy, improve the heat supply effect.
However, the radiation intensity of the sun depends on the weather conditions on the day or in a period of time, once the weather is bad, particularly in rainy days or in winter, the sun can be used for only a few times a week, so that the use of users is greatly influenced, and therefore, the collection of the solar energy needs to be reasonably distributed, so that hot water can be used as much as possible in a week.
Disclosure of Invention
The present invention aims to provide a solar heating system based on standby thermal energy storage, so as to solve the problems in the background art.
In order to achieve the above object, the present invention provides a solar heating system based on standby thermal energy storage, including a solar heat collecting unit, a collecting unit, an information collecting unit and a water supply and discharge control unit, where the solar heat collecting unit includes a solar heat collector, the solar heat collector is used for collecting solar energy and converting the solar energy into thermal energy to be transmitted to the collecting unit, the collecting unit includes a main collecting tank and a standby collecting tank, where:
the main collecting tank is used for absorbing heat transmitted by the solar heat collector and conducting the heat to water stored in the main collecting tank;
and the standby collecting tank is used for receiving the water output by the main collecting tank and carrying out heat preservation and storage.
The information acquisition unit comprises a weather information acquisition module and a located weather real-time acquisition module, the weather information acquisition module is used for acquiring future weather information and forming a water supply and outlet instruction of the main collection tank, and the located weather real-time acquisition module is used for acquiring the weather condition of the position where the solar heat collector is located in real time and forming a flow cutoff instruction of the standby collection tank;
and the water supply and discharge control unit is used for receiving a water supply and discharge instruction and a cutoff instruction and controlling the water flow of the main collecting tank and the standby collecting tank according to the corresponding instructions.
As a further improvement of the technical scheme, a circulation pipeline is arranged between the main collecting tank and the standby collecting tank, a water pump is arranged at one end of the circulation pipeline, and the water pump is used for executing a water supply and water outlet instruction of the main collecting tank and a flow cutoff instruction of the standby collecting tank.
As a further improvement of the technical scheme, the standby collecting tank is of a double-layer structure, and a cavity formed between the double-layer structure is filled with a heat insulation material.
As a further improvement of the technical solution, the weather information collection module directly acquires weather forecast of the future seven days released from the current day for the collection of the future weather information, and sends the weather forecast to the water supply and discharge control unit, the water supply and discharge control unit includes a water supply and discharge control module and a water cut-off control module, wherein:
the water supply and discharge control module adopts a general-component distribution algorithm to control water supply and discharge;
the cutoff control module employs a high temperature cutoff feed algorithm.
As a further improvement of the technical solution, the overall fraction allocation algorithm comprises the following steps:
firstly, receiving a seven-day weather forecast acquired by a weather information acquisition module;
distinguish the number of days with the sun
And no sun days>
Wherein:
number of days with sun
Including days of sunny, cloudy and cloudy days; sunsless days>
Including rainy days and snowThe number of days;
calculating the number of days without sun
In a ratio of (a) to (b), obtain>
；
Setting the amount of the weekly heating water
Obtaining a standby hot water supply quantity>
；
At this point, the product is distributed by the main collection tank
The water supply and discharge instruction of the water to the standby collecting tank is sent to the water pump, and the water pump is controlled to be on the day of the sun>
Thereby completing the water supply.
As a further improvement of the technical scheme, the standby hot water supply quantity is counted by taking seven days as a period.
As a further improvement of the present invention, the high temperature cutoff type supply algorithm comprises the following steps:
firstly, receiving real-time weather data of a position where a solar heat collector is located, which is acquired by a weather real-time acquisition module;
forming a cutoff instruction in non-solar weather, and sending the cutoff instruction to the water pump;
and correspondingly finishing the current cutoff instruction after the non-solar weather is finished.
As a further improvement of the technical scheme, the information acquisition unit further comprises a water consumption information acquisition module, and the water consumption information acquisition module is used for acquiring the daily used hot water amount in the main collection tank and the standby collection tank.
As a further improvement of the technical scheme, the weather real-time acquisition module memorizes the weather condition of the daily water consumption acquired by the water consumption information acquisition module.
As a further improvement of the technical scheme, the memory formed by the weather real-time acquisition module is used for the consumption of the circulating hot water
And completing the distribution of the water supply.
Compared with the prior art, the invention has the beneficial effects that:
1. in this heating system for solar energy based on reserve formula heat energy storage, set up the runner pipe between main collecting tank and the reserve collecting tank, the one end of runner pipe sets up the water pump, the water pump is used for carrying out the confession play water instruction of main collecting tank and the cutout instruction of reserve collecting tank, then carry out reserve with the reserve collecting tank of main collecting tank input according to the instruction, and reserve collecting tank is bilayer structure, and pack the material that separates the temperature in the cavity that forms between the bilayer structure, thereby reduce the radiating rate of water, prolong reserve cycle, or again:
cut-off operation is carried out to reserve collecting tank circulation pipeline, that is to say the water pump stop work to guarantee the hydrothermal surplus in the main collecting tank, guarantee that the user can normal use on this day when reserve.
2. In this heating system for solar energy based on reserve formula heat energy storage, utilize the high temperature to cut off formula supply algorithm and form the cutout instruction when raining or cloudy day, control water pump stop work to guarantee the hot water supply volume in the main collecting tank, use on the same day in order to provide, moreover after going out the sun, the water pump continues to work, and solar collector absorbs more heat this moment and supplies heat to the water in the main collecting tank, and the water of carrying in this moment to reserve collecting tank often all keeps under high temperature state.
Drawings
FIG. 1 is a block diagram of the flow of the whole unit module according to embodiment 1 of the present invention;
FIG. 2 is a block diagram of a module flow of an information collection unit according to embodiment 1 of the present invention;
fig. 3 is a block diagram of a module flow of a water supply and discharge control unit according to embodiment 2 of the present invention;
fig. 4 is a block diagram of a flow of a water consumption information collection module according to embodiment 3 of the present invention.
The various reference numbers in the figures mean:
100. a solar heat collection unit; 110. a solar heat collector;
200. a collection unit; 210. a main collection tank; 220. a standby collection tank;
300. an information acquisition unit; 310. a weather information acquisition module; 320. the weather real-time acquisition module is used for acquiring weather; 330. a water consumption information acquisition module;
400. a water supply and discharge control unit; 410. a water supply and discharge control module; 420. and a current interruption control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The present invention provides a solar heating system based on standby thermal energy storage, referring to fig. 1 and fig. 2, including a solar heat collecting unit 100, a collecting unit 200, an information collecting unit 300, and a water supply and discharge control unit 400, wherein the solar heat collecting unit 100 includes a solar heat collector 110, the solar heat collector 110 is used for collecting solar energy and converting the solar energy into thermal energy to be transmitted to the collecting unit 200, the collecting unit 200 includes a main collecting tank 210 and a standby collecting tank 220, wherein:
the main collection tank 210 is used for absorbing heat transferred from the solar collector 110 and transferring the heat to water stored therein;
the standby collection tank 220 is used for receiving the water output by the main collection tank 210 and performing heat preservation storage.
The information acquisition unit 300 comprises a weather information acquisition module 310 and a located weather real-time acquisition module 320, wherein the weather information acquisition module 310 is used for acquiring future weather information and forming a water supply and outlet instruction of the main collection tank 210, and the located weather real-time acquisition module 320 is used for acquiring weather conditions of the position where the solar collector 110 is located in real time and forming a flow cutoff instruction of the standby collection tank 220;
the water supply and discharge control unit 400 is configured to receive a water supply and discharge command and a water cutoff command, and perform water flow control on the main collection tank 210 and the spare collection tank 220 according to the respective commands.
In this embodiment, a circulation pipe is provided between the main collection tank 210 and the standby collection tank 220, one end of the circulation pipe is provided with a water pump, the water pump is used for executing a water supply instruction of the main collection tank 210 and a cutoff instruction of the standby collection tank 220, then the main collection tank 210 is input into the standby collection tank 220 for standby according to the instructions, the standby collection tank 220 is of a double-layer structure, and a cavity formed between the double-layer structure is filled with a thermal insulation material, so that the heat dissipation speed of water is reduced, the standby period is prolonged, and further, the water pump can be used for:
the flow pipe of the spare collection tank 220 is cut off, that is, the water pump stops working, so that the surplus of hot water in the main collection tank 210 is ensured, and the user can use the spare collection tank normally on the same day.
Example 2
Referring to fig. 3, the weather information collecting module 310 collects future weather information to directly obtain a weather forecast released seven days in the future from the current day, and sends the weather forecast to the water supply and discharge control unit 400, where the water supply and discharge control unit 400 includes a water supply and discharge control module 410 and a flow cutoff control module 420, where:
the water supply and discharge control module 410 adopts a total distribution algorithm to control water supply and discharge;
the current interrupt control module 420 adopts a high-temperature current-interrupting type supply algorithm, and the total fractional allocation algorithm comprises the following steps:
firstly, receiving a seven-day weather forecast acquired by a weather information acquisition module 310;
distinguish the number of days with the sun
And no sun days>
Wherein:
number of days with sun
Including days of sunny, cloudy and cloudy days; number of sunless days->
Including the number of days in rainy and snowy weather, and the number of sunday->
Four days, wherein the first week and the second week are sunny days; thursday is cloudy; saturday is cloudy;
calculating the number of sunless days
Get the ratio of (B) to->
；
Setting the consumption of the circulating hot water
The standby hot water supply quantity is obtained>
；
At this point, the production is distributed by the main collection tank 210
The water supply and discharge instruction from the water supply tank 220 to the water pump is sent to the water pump to control the water pump to be in the state of being in the sun for the number of days>
The water supply is completed, that is, 97.5L of hot water is required to be supplied in one day on average, wherein the temperature of the hot water is kept between 45 ℃ and 60 ℃.
It is noted that the standby hot water supply amount is counted in a period of seven days.
In addition, considering that the sun (non-rainy weather) is not all the day with the sun, such as cloudy weather or thunderstorm weather, there is no sun in the morning and afternoon, which results in that the hot water remained in the main collecting tank 210 is not enough after the average water supply for the day, and the temperature of the hot water supplied to the standby collecting tank 220 is not kept at a high temperature, thereby affecting the temperature of the hot water standby and the normal use of the hot water for the day, the embodiment also discloses a high-temperature cut-off type supply algorithm, which comprises the following algorithm steps:
firstly, receiving real-time weather data of the position where the solar collector 110 is located, acquired by the weather real-time acquisition module 320, acquiring a real-time weather forecast through a network in an acquisition mode, acquiring real-time influence of the position where the solar collector 110 is located through a camera in real time, and judging the real-time weather condition of the position;
assuming that a shut-off command is generated when non-solar weather (i.e., raining or cloudy) occurs at 3 to 6 am of the day and is transmitted to the water pump, the water pump stops working at this time, thereby ensuring the hot water supply amount in the main collection tank 210 for the use of the day;
after the non-solar weather is finished, the cutoff instruction is correspondingly finished, namely after the sun comes out, the water pump continues to work, at the moment, the solar heat collector 110 absorbs more heat to supply heat to the water in the main collecting tank 210, at the moment, the water conveyed into the standby collecting tank 220 is always kept in a high-temperature state, generally, 55-60 ℃, when the standby hot water supply is reached, the water pump stops working, at the moment, a water changing type supply mode is adopted, namely, when the main collecting tank 210 is full and reaches the temperature, the water pump works, the standby collecting tank 220 drains water while working, at the moment, the water is changed in an aligned mode, the quality of the water is ensured, the temperature of the standby water is maintained, and in order to improve the utilization of the water, the water discharged by the standby collecting tank 220 can be collected and utilized.
Example 3
Considering that each user sometimes does not know the consumption of the domestic hot water, usually the water cost, but knows the domestic water consumption after coming out, and does not know the hot water consumption at the moment, the set weekly hot water consumption is taken into consideration
In view of the fact that the actual demand is not met, in the information collecting unit 300 disclosed in this embodiment, please refer to fig. 4, the information collecting unit 300 further includes a water consumption information collecting module 330, the water consumption information collecting module 330 is used for collecting the amount of hot water used in the main collecting tank 210 and the standby collecting tank 220 on the same day, so as to count the hot water usage of a week, in order to improve the accuracy, the average value of the accumulated water usage of multiple weeks can be set, and the average value or the hot water usage greater than the average value is set, so as to improve the ambient water usage (r |)>
The accuracy of the setting.
In addition, the weather real-time collection module 320 memorizes the weather condition of the water consumption of the day collected by the water information collection module 330, and the specific principle is as follows:
assuming that the daily water consumption is 130L and the rainy day temperature is 28 ℃, memorizing at the moment, forming a complete memory bank (real-time updating) after memorizing for many times, and directly calculating the consumption of the circulating water according to the weather forecast of one week
Then updates the water content and further ensures the weekly heat water dosage->
The accuracy of (2);
meanwhile, the amount of hot water used in the last few days is calculated in advance according to the weather forecast, so that reasonable water supply distribution is performed, as illustrated in embodiment 2, according to the weather forecast, the temperature of Wednesday is 28 ℃, the water consumption of the same day is 130L, the temperature of Monday and Tuesday is clear, but the temperature of Tuesday is lower than that of Monday, so that the required amount of hot water is larger, distribution is performed at the moment, the water supply amount of Tuesday is reduced, the water supply amount of Monday is increased, and the sum of the two is larger than or equal to 130L, so that reasonable water supply distribution is realized.
The foregoing shows and describes the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. Heating system for solar energy based on reserve formula heat energy storage, its characterized in that includes solar energy collection unit (100), collection unit (200), information acquisition unit (300) and supplies out water control unit (400), solar energy collection unit (100) includes solar collector (110), solar collector (110) are used for gathering solar energy to convert into heat energy and carry to collection unit (200), collection unit (200) include main holding vessel (210) and reserve holding vessel (220), wherein:
the main collecting tank (210) is used for absorbing heat conveyed by the solar heat collector (110) and conducting the heat into water stored in the main collecting tank;
the standby collecting tank (220) is used for receiving the water output by the main collecting tank (210) and performing heat preservation and storage;
the information acquisition unit (300) comprises a weather information acquisition module (310) and a weather real-time acquisition module (320), wherein the weather information acquisition module (310) is used for acquiring future weather information and forming a water supply and outlet instruction of a main collection tank (210), and the weather real-time acquisition module (320) is used for acquiring the weather condition of the position where the solar heat collector (110) is located in real time and forming a flow cutoff instruction of a standby collection tank (220);
the water supply and outlet control unit (400) is used for receiving a water supply and outlet instruction and a water cut-off instruction and controlling the water flow of the main collecting tank (210) and the standby collecting tank (220) according to the corresponding instructions;
a circulation pipeline is arranged between the main collecting tank (210) and the standby collecting tank (220), and a water pump is arranged at one end of the circulation pipeline and is used for executing a water supply and water outlet instruction of the main collecting tank (210) and a flow cutoff instruction of the standby collecting tank (220);
the standby collecting tank (220) is of a double-layer structure, and a cavity formed between the double-layer structure is filled with a heat insulation material;
the weather information acquisition module (310) directly acquires the weather forecast of publishing seven days in the future from the present day to the collection of future weather information, and sends to supply out water control unit (400), supply out water control unit (400) including supply out water control module (410) and cutout control module (420), wherein:
the water supply and discharge control module (410) adopts a general fractional distribution algorithm to control water supply and discharge;
the current interrupt control module (420) adopts a high-temperature current interrupt type supply algorithm;
the overall fraction distribution algorithm comprises the following steps:
firstly, receiving a seven-day weather forecast acquired by a weather information acquisition module (310);
distinguish the number of days with the sun
And no sun days>
Wherein:
number of days with sun
Including days of sunny, cloudy and cloudy days; number of sunless days->
Including the days of rainy and snowy days;
calculating the number of days without sun
Get the ratio of (B) to->
；
Setting the consumption of the circulating hot water
The standby hot water supply quantity is obtained>
；
At this time, the distribution by the main collecting tank (210) is generated
The water supply and discharge instruction of the water in the standby collecting tank (220) is sent to the water pump, and the water pump is controlled to be on the sun days>
Thereby completing the water supply.
2. A solar powered heating system based on backup thermal energy storage as claimed in claim 1 wherein: the standby hot water supply amount is counted in a period of seven days.
3. A solar heating system based on backup thermal energy storage according to claim 1, characterized in that: the high temperature cut-off type supply algorithm comprises the following steps:
firstly, receiving real-time weather data of the position where a solar heat collector (110) is located, which is acquired by a weather real-time acquisition module (320);
forming a cutoff instruction in non-solar weather, and sending the cutoff instruction to the water pump;
and correspondingly finishing the current cutoff instruction after the non-solar weather is finished.
4. A solar powered heating system based on backup thermal energy storage as claimed in claim 1 wherein: the information acquisition unit (300) further comprises a water consumption information acquisition module (330), and the water consumption information acquisition module (330) is used for acquiring the daily hot water consumption in the main collection tank (210) and the standby collection tank (220).
5. A solar powered heating system based on backup thermal energy storage as claimed in claim 4 characterised in that: the weather real-time acquisition module (320) memorizes the weather condition of the water consumption of the day acquired by the water consumption information acquisition module (330).
6. A solar powered heating system based on backup thermal energy storage as claimed in claim 5 characterised in that: the memory formed by the weather real-time acquisition module (320) is used for the consumption of the circulating hot water
And completing the distribution of the water supply. />
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| EP2326886B1 (en) * | 2008-09-25 | 2017-05-31 | Solfast Pty Ltd | Solar collector |
| CN104482679B (en) * | 2014-11-13 | 2016-10-05 | 广东万家乐燃气具有限公司 | Multiple-energy-source composite hot-water system control method with anticipation computing function |
| CN106839467B (en) * | 2017-01-18 | 2018-12-04 | 天津大学 | A kind of control method for the double water tank solar water heating system changing lowest water level |
| CN107131552A (en) * | 2017-05-19 | 2017-09-05 | 上海交通大学 | A kind of solar energy composite heat power supply hot-water heating system and its control method |
| CN207991000U (en) * | 2018-03-01 | 2018-10-19 | 广西大学 | A kind of solar hot water intelligent controller based on meteorological data |
| CN111189232A (en) * | 2020-01-21 | 2020-05-22 | 大唐吉林发电有限公司热力分公司 | Solar energy and air source heat pump composite heating system in severe cold region |
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