CN107796040A - Solar water heating system heat storage water tank is layered controlling Method for inflow - Google Patents
Solar water heating system heat storage water tank is layered controlling Method for inflow Download PDFInfo
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- CN107796040A CN107796040A CN201710052042.3A CN201710052042A CN107796040A CN 107796040 A CN107796040 A CN 107796040A CN 201710052042 A CN201710052042 A CN 201710052042A CN 107796040 A CN107796040 A CN 107796040A
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- heat storage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0015—Domestic hot-water supply systems using solar energy
- F24D17/0021—Domestic hot-water supply systems using solar energy with accumulation of the heated water
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of solar water heating system heat storage water tank to be layered controlling Method for inflow, according to the temperature difference between heat collector water outlet and heat storage water tank stratified water, the layered position for entering heat storage water tank to heat collector water outlet automatically controls, and has the function that to improve heat storage water tank thermal stratification effect.Solar water heating system heat storage water tank layering controlling Method for inflow proposed by the invention, it can effectively improve the stable layered effect of heat storage water tank, the delivery quality and reliability of domestic hot-water is improved, the efficiency of energy utilization of system is improved, suitable for big-and-middle-sized solar water heating system.
Description
Technical field
The present invention relates to solar water heating system control field, particularly a kind of solar water heating system heat storage water tank layering
Controlling Method for inflow.
Background technology
Solar water heating system is one of more ripe and effective mode for utilizing solar energy of current technology.Heat storage water tank is made
For the important heat accumulation equipment of solar water heating system, can effectively solve solar energy itself intermittence and unreliability, improve the sun
The utilization rate of energy.Because the density of water is inversely proportional with temperature, low-temperature water heating density is gathered in the bottom of water tank, high temperature greatly in water tank
Hot water density is small, floats to the top of water tank, it is achieved thereby that vertical demixing phenomenon of the water of different temperatures in water tank.
When solar energy system is run, hot water caused by heat collector can be entered in heat storage water tank with certain flow.Due to
The hot water of entrance has certain temperature difference when mixing with the hot water of porch, not only can produce obvious disturbance in water inlet, and
And convection phenomena caused by the temperature difference can also cause thermal stratification to get muddled, so as to increase thermoclinic thickness, water is had a strong impact on
Thermal stratification phenomenon in case.In addition, because heat storage water tank temperature of top is in reduced levels, hot water used in system supply will be had influence on
Q＆r, so as to have impact on the overall performance of hot-water heating system.
The quality of water tank stratified effect can directly affect the operational effect of whole solar water heating system, and thermal storage performance is good
Water tank can not only meet the needs of user's thermic load, reduce auxiliary heating amount, moreover it is possible to reduce the inlet water temperature of heat collector, improve
The utilization ratio of solar energy.
The content of the invention
The technical problems to be solved by the invention are, in view of the shortcomings of the prior art, providing a kind of solar water heating system storage
Boiler is layered controlling Method for inflow.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of solar water heating system water storage
Case is layered controlling Method for inflow, comprises the following steps：
1) heat storage water tank is divided into n+1 temperature layer, wherein water inlet end is located at the n-layer on heat storage water tank top, is designated as respectively
1st, 2 ..., i ... n-layer, water side are arranged at the heat storage water tank bottom, are denoted as 0 layer；Reload temperature senses in each temperature layer water body
Device, the water temperature of each temperature layer of continuous monitoring, be designated as T0, T1, T2 respectively ..., Ti ... Tn；Monitor going out for solar thermal collector simultaneously
Coolant-temperature gage, it is denoted as Tc；Water inlet end the 1st, 2 ..., i ... n-layer be respectively equipped with valve V1 ..., Vi ... Vn；Water side is the 0th layer and set
There is valve V0；
2) when the solar thermal collector leaving water temperature Tc measured and heat storage water tank near-bottom temperature T0 difference Tc-T0 is more than most
During small unlatching temperature difference setting value SD1, by Tc with heat storage water tank 1 to the water temperature T 1 of n temperature layers to Tn respectively compared with, and sentence
The minimum temperature layer of disconnected absolute difference, the minimum temperature layer of the absolute difference is designated as m；
If a) current entry valve switch signal B ≠ m, and when same state continuous running time C is more than setting value SD3
When：
1. when if B=-1, i.e. water inlet end, all valves in water side are turned off, then heat storage water tank bottom outlet pipe is opened
Road valve V0 and inlet pipeline valve Vm, thermal-arrest water circulating pump is opened, makes B=m；
2. if B ≠ -1, closes heat storage water tank inlet pipeline valve VB, valve Vm is opened；
If b) current entry valve switch signal B ≠ m, and as same state continuous running time C≤SD3, maintain
The valvular current switch states of institute are constant；
If c) during current entry valve switch signal B=m, maintain the valvular current switch states of institute constant；
3) when the heat collector leaving water temperature Tc measured and heat storage water tank near-bottom temperature T0 difference Tc-T0 is less than maximum close
During temperature difference setting value SD2：
If a) during current valve switching signal B ≠ -1, closing all valve V0 to Vn, thermal-arrest water circulating pump is closed,
And make B=-1；
If b) during current valve switching signal B=-1, continuing to keep all valve V0 to Vn closed mode constant,
Continue the closing of holding thermal-arrest water circulating pump；
4) when the heat collector leaving water temperature Tc measured and heat storage water tank near-bottom temperature T0 difference Tc-T0 closes between maximum
When between temperature difference SD2 and minimum unlatching temperature difference SD1, maintain the on off state of collecting system valve constant, and according to above-mentioned steps
1) on off state of valve and circulating pump is adjusted with 2) judgement.
In the present invention, the heat storage water tank volume >=600L；The heat storage water tank is cylindrical, the cylindrical height
Ratio range with diameter is 3.0~4.0；, the temperature number of plies N of heat storage water tank scope is 4~10 layers, each temperature layer
Altitude range be 0.1~0.4m；Temperature difference setting value SD1 scope is 4.0~10.0 DEG C, and SD2 scope is 1.0~5.0 DEG C,
And SD1 is more than SD2, SD1 and SD2 difference more than 1.0 DEG C；Setting value SD3 scope is 30~120 seconds；The TEMP
The temperature-measuring range of device is -20 DEG C~100 DEG C, and temperature measurement accuracy is ± 0.1 DEG C.
Compared with prior art, the advantageous effect of present invention is that：The present invention is by contrasting each layer water of heat storage water tank
Temperature and heat collector exit water temperature, judge the water tank temperature layer minimum with heat collector temperature difference of outlet water, and opening corresponding heat storage water tank should
Valve before the autocontrol valve of layer water inlet locations and shut-off, heat collector water outlet is imported into the heat accumulation that the temperature difference is minimum therewith
In tank temperature stratification water body, so as to reduce the influence to tank temperature stratification, raising system effectiveness and hot water are supplied reliable
Property；Maintain the hot water in heat storage water tank to be in relatively stable stratification state, reduce the efficiency drop brought because hot and cold water mixes
Low problem；Good thermal stratification can reduce the time that water tank temperature of top reaches pre-provisioning request, improve the matter of system water supply
Amount and reliability；It is widely used in various solar heat water stratification heat storage water tanks, it might even be possible to derive to non-solar thermal source
In heat storage water tank, such as the heat storage water tank of thermal source is used as using heat pump.
Brief description of the drawings
Fig. 1 is that solar water heating system heat storage water tank is layered controlling Method for inflow schematic diagram in the present invention, wherein：
1-1 --- solar thermal collector 1-2 --- control module
1-3 --- solar energy circulating pump 1-4 --- autocontrol valve
1-5 --- heat storage water tank 1-6 --- temperature sensor (heat collector outlet)
1-7 --- temperature sensor (each layer of heat storage water tank) V0 --- water tank bottom outlet pipeline control valve
V1 ..., Vi ... Vn --- each stratification temperature inlet pipeline valve of water tank
Fig. 2 is the control method flow chart of the present invention.
Embodiment
Fig. 1 is the technical schematic diagram that heat collector water outlet is entered water tank by thermal stratification, collects hot side circulating pump and heat storage water tank
The autocontrol valve of delivery port is connected with control module 1-2, and autocontrol valve and the control module 1-2 of heat storage water tank water inlet connect
Connect.In addition, thermal storage device exit mounting temperature sensor 1-6, heat storage water tank is each provided with temperature sensor 1-7 in layering,
All temperature sensors are connected by signal wire with control module 1-2.
Reference picture 2, control method flow chart of the invention, concrete operations are as follows：
(1) it is that " -1 " (i.e. exits and entrances valve is complete that heat storage water tank inlet and outlet switching signal B is preset in control module 1-2
Portion closes, thermal-arrest circulation pump), it is " 0 " that thermal-arrest water circulating pump, which continuously opens time span C, reads the minimum temperature difference of opening and sets
Definite value SD1, maximum closing temperature difference setting value SD2 is read, running status is read and changes minimum duration setting value SD3.(step S1)
(2) temperature signal Tc is constantly sent to control module 1-2, heat storage water tank by heat collector outlet temperature sensor 1-6
Each layer water temperature T i (each layer is followed successively by T0, T1, T2 ... Tn) is constantly sent to control module 1- by each stratification temperature sensor 1-7
2.(step S2)
(3) Tc and T0 differences are calculated, is denoted as TJ.(step S3)
(4) TJ and SD1 magnitude relationship are judged.(step S4)
(5) if TJ is less than SD1, judge whether B is equal to " -1 " (step L1).
If B is not equal to " -1 ", TJ and SD2 magnitude relationship (step L2) is judged, as TJ is less than SD2, then close thermal-arrest
Side circulating pump 1-3 and all control valve V0 to Vn (step L3), return to step S2, as TJ is more than SD2, then it is equal to " -1 ", directly
Return to step S2.
(6) if TJ is more than or equal to SD1, (T1 is extremely by each layer temperature Ti corresponding to calculating heat storage water tank collection hot side water inlet successively
Tn) with heat collector exit water temperature Tc absolute difference, it is designated as Tdi.(step S5)
(7) relatively and Tdi minimum value is obtained, the corresponding heat storage water tank number of plies is designated as m.(step S6)
(8) judge whether B is equal with m.(step S7)
(9) if B is equal to m, direct return to step S2.
(10) if B is not equal to m, C and SD3 size are judged.(step S8)
(11) if C is more than SD3, closing control valve VB, step S10 is gone successively to.(step S9)
(12) control valve Vm is opened, setting B is equal to m, starts timing and is recorded as C.(step S10)
(12) if C is less than or equal to SD3, judge whether B is equal to " -1 ".(step L4)
If B is equal to " -1 ", thermal-arrest water circulating pump 1-3 and control valve V0 (step L4) is opened, performs step S10 afterwards；
If B is not equal to " -1 ", direct return to step S2.
(13) judge whether system receives starting-up signal.(step S11)
(14) if receiving off signal, circulating pump and all control valves, end loop are closed.(step S12)
(15) if not receiving off signal, direct return to step S2.
Claims (7)
1. a kind of solar water heating system heat storage water tank is layered controlling Method for inflow, it is characterised in that comprises the following steps：
1) heat storage water tank being divided into n+1 temperature layer, wherein water inlet end is located at the n-layer on heat storage water tank top, be designated as 1 respectively,
2 ..., i ... n-layer, water side are arranged at the heat storage water tank bottom, are denoted as 0 layer；Reload temperature senses in each temperature layer water body
Device, the water temperature of each temperature layer of continuous monitoring, be designated as T0, T1, T2 respectively ..., Ti ... Tn；Monitor going out for solar thermal collector simultaneously
Coolant-temperature gage, it is denoted as Tc；Water inlet end the 1st, 2 ..., i ... n-layer be respectively equipped with valve V1 ..., Vi ... Vn；Water side is the 0th layer and set
There is valve V0；
2) when the solar thermal collector leaving water temperature Tc measured and heat storage water tank near-bottom temperature T0 difference Tc-T0 open more than minimum
When opening temperature difference setting value SD1, by Tc with heat storage water tank 1 to the water temperature T 1 of n temperature layers to Tn respectively compared with, and judge exhausted
To the temperature layer that difference is minimum, the minimum temperature layer of the absolute difference is designated as m；
If a) current entry valve switch signal B ≠ m, and when same state continuous running time C is more than setting value SD3：
1. when if B=-1, i.e. water inlet end, all valves in water side are turned off, then heat storage water tank bottom outlet pipeline valve is opened
Door V0 and inlet pipeline valve Vm, opens thermal-arrest water circulating pump, makes B=m；
2. if B ≠ -1, closes heat storage water tank inlet pipeline valve VB, valve Vm is opened；
If b) current entry valve switch signal B ≠ m, and as same state continuous running time C≤SD3, would remain all
The current switch states of valve are constant；
If c) during current entry valve switch signal B=m, maintain the valvular current switch states of institute constant；
3) when the heat collector leaving water temperature Tc measured and heat storage water tank near-bottom temperature T0 difference Tc-T0 is less than the maximum closing temperature difference
During setting value SD2：
If a) during current valve switching signal B ≠ -1, closing all valve V0 to Vn, thermal-arrest water circulating pump is closed, and make B
=-1；
If b) during current valve switching signal B=-1, continuing to keep all valve V0 to Vn closed mode constant, continue
Keep the closing of thermal-arrest water circulating pump；
4) when the heat collector leaving water temperature Tc measured and heat storage water tank near-bottom temperature T0 difference Tc-T0 closes the temperature difference between maximum
When between SD2 and minimum unlatching temperature difference SD1, maintain the on off state of collecting system valve constant, and according to above-mentioned steps 1) and
2) on off state of adjustment valve and circulating pump is judged.
2. solar water heating system heat storage water tank according to claim 1 is layered controlling Method for inflow, it is characterised in that institute
State heat storage water tank volume >=600L.
3. solar water heating system heat storage water tank according to claim 1 is layered controlling Method for inflow, it is characterised in that institute
Heat storage water tank is stated as cylinder, the ratio range of the cylindrical height and diameter is 3.0~4.0.
4. solar water heating system heat storage water tank according to claim 3 is layered controlling Method for inflow, it is characterised in that institute
The scope for stating the temperature number of plies N of heat storage water tank is 4~10 layers, and the altitude range of each temperature layer is 0.1~0.4m.
5. solar water heating system heat storage water tank according to claim 1 is layered controlling Method for inflow, it is characterised in that temperature
Poor setting value SD1 scope is 4.0~10.0 DEG C, and SD2 scope is 1.0~5.0 DEG C, and SD1 is more than SD2, SD1 and SD2
Difference is more than 1.0 DEG C.
6. solar water heating system heat storage water tank according to claim 1 is layered controlling Method for inflow, it is characterised in that sets
Definite value SD3 scope is 30~120 seconds.
7. the solar water heating system heat storage water tank layering controlling Method for inflow according to one of claim 1~6, its feature
It is, the temperature-measuring range of the temperature sensor is -20 DEG C~100 DEG C, and temperature measurement accuracy is ± 0.1 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710052042.3A CN107796040B (en) | 2017-01-20 | 2017-01-20 | Layered water inlet control method for heat storage water tank of solar water heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710052042.3A CN107796040B (en) | 2017-01-20 | 2017-01-20 | Layered water inlet control method for heat storage water tank of solar water heating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107796040A true CN107796040A (en) | 2018-03-13 |
| CN107796040B CN107796040B (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710052042.3A Active CN107796040B (en) | 2017-01-20 | 2017-01-20 | Layered water inlet control method for heat storage water tank of solar water heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227538A1 (en) * | 2020-05-09 | 2021-11-18 | 江苏苏净集团有限公司 | Constant-temperature water supply system employing carbon dioxide heat pump, and control method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2896145Y (en) * | 2006-04-07 | 2007-05-02 | 中山市万径科技发展有限公司 | Stratified-fluid solar heat-accumulated double-source heat pump central water-heating system |
| CN103047785A (en) * | 2013-01-06 | 2013-04-17 | 芜湖贝斯特新能源开发有限公司 | Stepless stratified hot water storage tank |
| CN103134186A (en) * | 2013-03-18 | 2013-06-05 | 郏松筠 | Multiple-cavity heat preservation water tank free of water mixing |
| JP2016223700A (en) * | 2015-06-01 | 2016-12-28 | 株式会社Ｎｔｔファシリティーズ | Air conditioning system |
-
2017
- 2017-01-20 CN CN201710052042.3A patent/CN107796040B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2896145Y (en) * | 2006-04-07 | 2007-05-02 | 中山市万径科技发展有限公司 | Stratified-fluid solar heat-accumulated double-source heat pump central water-heating system |
| CN103047785A (en) * | 2013-01-06 | 2013-04-17 | 芜湖贝斯特新能源开发有限公司 | Stepless stratified hot water storage tank |
| CN103134186A (en) * | 2013-03-18 | 2013-06-05 | 郏松筠 | Multiple-cavity heat preservation water tank free of water mixing |
| JP2016223700A (en) * | 2015-06-01 | 2016-12-28 | 株式会社Ｎｔｔファシリティーズ | Air conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227538A1 (en) * | 2020-05-09 | 2021-11-18 | 江苏苏净集团有限公司 | Constant-temperature water supply system employing carbon dioxide heat pump, and control method therefor |
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| CN107796040B (en) | 2020-04-03 |
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