CN1892147A - Direct-flow type solar water-heating system and its water-flow control method - Google Patents
Direct-flow type solar water-heating system and its water-flow control method Download PDFInfo
- Publication number
- CN1892147A CN1892147A CNA2005100804846A CN200510080484A CN1892147A CN 1892147 A CN1892147 A CN 1892147A CN A2005100804846 A CNA2005100804846 A CN A2005100804846A CN 200510080484 A CN200510080484 A CN 200510080484A CN 1892147 A CN1892147 A CN 1892147A
- Authority
- CN
- China
- Prior art keywords
- temperature
- water
- heat collector
- circulating pump
- water circulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
A single flow solar water heating system includes heat storage water tank, heating collector, water circulating pump, temperature measuring set at heating collector outlet, and flow control unit connected with water circulating pump. Said system water flow control method includes according to preset heating collector outlet temperature T1 controlling said system water circulating pump working for controlling flow rate and keeping heating collector outlet temperature constant, when heating collector outlet temperature T1 >= upper temperature limit T (on), flow control unit controlling water circulating pump operation and according to heating collector temperature variation regulating water circulating pump flow rate making heating collector outlet water temperature constant as preset upper temperature limit T, when heating collector outlet temperature T1 <= preset lower temperature limit T (OFF), flow control unit stopping working and water circulating pump stopping operation. The present invention can effectively raise solar water heating system collection efficiency and prolong service life.
Description
Technical field
The invention belongs to application of solar, be specifically related to a kind of direct-flow type solar water-heating system and water-flow control method thereof.
Background technology
Existing direct-flow type solar water-heating system, its water-flow control method be to control opening, stopping of water circulating pump according to the predefined temperature in heat collector exit, thereby provide hot water to heat storage water tank.When the temperature in heat collector exit reaches predefined temperature, the water circulating pump entry into service, the temperature in heat collector exit will progressively rise, afterwards will be considerably beyond predefined temperature, after continuing for some time, the heat collector outlet temperature descends again slowly, when the outlet temperature of heat collector drop to be lower than predefined temperature after, water circulating pump shuts down, solar water heating system is in vexed solarization state, and when the temperature in heat collector exit 〉=predefined temperature, water circulating pump is entry into service again, so go round and begin again the method for operation of Here it is typical direct-flow type solar water-heating system.
The collecting efficiency of this single flow hot-water heating system is higher, but has the following disadvantages:
At first, because the radiation intensity of the sun is to change constantly, and the discharge that enters heat collector is invariable, the exit water temperature of heat collector changes along with the height of solar irradiance like this: when solar irradiance is higher, the exit temperature height of heat collector, and the output of water circulating pump is constant, and the outlet water temperature of heat collector is too high like this, promptly the actual water temperature in the heat storage water tank much larger than the heat collector exit predefined temperature upper limit T (on); And when solar irradiance reduced, the exit temperature of heat collector was on the low side, and the water circulating pump output is constant, made the exit water temperature of heat collector may be lower than the predefined lowest temperature T in heat collector exit (off), thereby had reduced the collecting efficiency of heat collector.
In addition, because the temperature in heat collector exit is among the variation all the time, its change procedure is parabolic shape, and what make water circulating pump opens, stops too frequent, and water circulating pump can not continuous operation, influences its service life.Simultaneously, the intermittent working of water circulating pump descends the collecting efficiency of whole solar water heating system.
Summary of the invention
Technical problem to be solved by this invention is the above-mentioned deficiency at prior art, and a kind of direct-flow type solar water heater system and water-flow control method thereof that can effectively improve system's collecting efficiency is provided.
The technical scheme that solution the technology of the present invention problem is adopted is that direct-flow type solar water-heating system comprises heat storage water tank, heat collector, water circulating pump, the heat collector water inlet end is connected with water circulating pump, the heat collector water side is connected with heat storage water tank, be equipped with temperature sensor PT1 in the heat collector exit, wherein, be connected with volume control device on the water circulating pump.
Preferably, described volume control device is the frequency converter that is subjected to temperature measuring set control.
The water-flow control method of this direct-flow type solar water-heating system, be with the control flow according to the water circulating pump work in temperature T 1 this system of control in the heat collector exit that presets, and reach the temperature T 1 in control heat collector exit with this, reach constant to heat collector exit temperature: when the temperature upper limit T (on) of the temperature T 1 in heat collector exit 〉=preset, by the running of volume control device control water circulating pump, and regulate the flow of water circulating pump according to heat collector exit variation of temperature, make the constant temperature upper limit T (on) of heat collector exit water temperature for presetting; When the lowest temperature T (off) of the temperature T 1 in heat collector exit≤preset, volume control device quits work, and water circulating pump shuts down.
Preferably, described volume control device is a frequency converter, when the temperature upper limit T (on) of the temperature T 1 in heat collector exit 〉=preset, frequency converter is according to heat collector exit variation of temperature, regulate its flow by the operating frequency of regulating water circulating pump, make the constant temperature upper limit T (on) of heat collector exit water temperature: when heat collector exit temperature is tending towards rising for presetting, frequency converter improves the operating frequency of water circulating pump, thereby strengthen the rate of discharge of water circulating pump current, the exit temperature of heat collector is reduced; When heat collector exit temperature was tending towards descending, frequency converter reduced the operating frequency of water circulating pump, thereby reduced the rate of discharge of water circulating pump current, and heat collector exit temperature is raise.
The present invention is by adopting temperature and flow duplex controlling method, the rotating speed that makes water circulating pump is respective change thereupon along with the variation of solar irradiance, thereby the discharge and the solar irradiance that enter heat collector are adapted, make the outlet temperature of heat collector keep constant, improve the collecting efficiency of system to greatest extent, increased the practicality of native system greatly.Simultaneously, open, stop number of times, also improved the service life of water circulating pump owing to reduced water circulating pump.
Description of drawings
Fig. 1 is the structural representation of system of the present invention
Among the figure: 1-heat collector 2-heat collector outlet pipe 3-heat accumulation hydrophone 4-heat collector water inlet pipe 5-check-valves 6-water circulating pump 7-frequency converter 8-temperature sensor 9-tap water tank 10-running water water inlet pipe
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, direct-flow type solar water-heating system of the present invention mainly includes heat storage water tank 3, heat collector 1, water circulating pump 6, water circulating pump 6 one ends are connected with tap water tank 9, the other end is connected with heat collector water inlet pipe 4 by check-valves 5, heat collector outlet pipe 2 is connected with heat storage water tank 3, in the exit of heat collector 1 temperature sensor 8 is arranged, wherein, also be connected with volume control device on the water circulating pump 6.The preferred frequency converter 7 of volume control device.
The water-flow control method that the present invention adopts is: water circulating pump 6 is according to the temperature T 1 in the heat collector exit that presets and carry out work under the control of volume control device, promptly when the temperature upper limit T (on) of the temperature T 1 in heat collector 1 exit that temperature sensor PT1 reflects 〉=preset, by 6 runnings of frequency converter 7 control water circulating pumps, and in time regulate the flow of water circulating pump 6 according to heat collector 1 exit variation of temperature, make the constant temperature upper limit T (on) of heat collector 1 exit water temperature for presetting.Wherein the control method of frequency converter 7 is: when heat collector 1 exit temperature is tending towards rising, improve the operating frequency of water circulating pump 6, thereby strengthen the rate of discharge of water circulating pump 6 current, the exit temperature of heat collector 1 is reduced; When the exit temperature is tending towards descending, reduce the operating frequency of water circulating pump 6, thereby reduce the rate of discharge of water circulating pump 6 current, the exit temperature of heat collector 1 is raise.When the lowest temperature T (off) of the temperature T 1 in heat collector 1 exit≤preset, frequency converter 7 quits work, and water circulating pump 6 shuts down.When the temperature upper limit T (on) of the temperature T 1 in heat collector 1 exit 〉=preset, frequency converter 7 restarts to control water circulating pump 6 and turns round, and continues to supply water to heat collector 1.
The span of the temperature gap between temperature upper limit T (on) and the lowest temperature T (off) is 2-6 ℃, is preferably 3 ℃.
The scope of temperature upper limit T (on) is 30-50 ℃, and preferred 45 ℃, the scope of lowest temperature T (off) is 25-48 ℃, preferred 42 ℃.
Embodiment 1:
As shown in Figure 1, be direct-flow type solar water-heating system of the present invention.
For the domestic hot-water, the temperature upper limit T (on) of predetermined heat collector 1 exit temperature is 45 ℃, and lowest temperature T (off) is 42 ℃.When 42 ℃ of the lowest temperatures of the temperature value T1 in heat collector 1 exit that is reflected by temperature sensor PT1≤preset, forbid water circulating pump 6 runnings by frequency converter 7 controls; When 45 ℃ of the temperature upper limits of the temperature value T1 in heat collector 1 exit that is reflected by temperature sensor T1 〉=preset, by 6 runnings of frequency converter 7 control water circulating pumps, and in time regulate the operating frequency of water circulating pump 6 according to the variation of heat collector 1 outlet temperature, thereby regulate the rotating speed and the water flow of water circulating pump 6, make the exit water temperature of heat collector 1 remain constant 45 ℃ of the temperature upper limits that preset that are.Concrete adjusting principle is: when heat collector 1 exit temperature is tending towards rising, improve the operating frequency of water circulating pump 6, thereby strengthen the rate of discharge of water circulating pump 6 current, the exit temperature of heat collector 1 is reduced; When heat collector 1 exit temperature is tending towards descending, reduce the operating frequency of water circulating pump 6, thereby reduce the rate of discharge of water circulating pump 6, the exit temperature of heat collector 1 is risen.When running into sunshine when not enough (sunshine is blocked by cloud layer or other reasons descends intensity of sunshine), during 42 ℃ of the lowest temperatures of the temperature T 1 in heat collector 1 exit≤preset, frequency converter 7 quits work, and water circulating pump 6 stops to supply water to heat collector 1, and solar water heating system is in vexed solarization state.During 45 ℃ of temperature upper limits that returns to again 〉=preset when the temperature T 1 in heat collector 1 exit, frequency converter 7 restarts to control water circulating pump 6 and carries out work, continues to supply water to heat collector 1.The present invention so constantly repeats heating.
Embodiment 2:
As shown in Figure 1, be direct-flow type solar water-heating system of the present invention.
To heated swimming pool, the temperature upper limit T (on) of the outlet temperature of predetermined heat collector 1 is 33 ℃, and lowest temperature T (off) is 30 ℃.When 30 ℃ of the lowest temperatures of the temperature value T1 in heat collector 1 exit that is reflected by temperature sensor PT1≤preset, forbid water circulating pump 6 work by frequency converter 7 controls; When 33 ℃ of the temperature upper limits of the temperature value T1 in heat collector 1 exit that is reflected by temperature sensor PT1 〉=preset, carry out work by frequency converter 7 control water circulating pumps 6, and in time regulate the operating frequency of water circulating pump 6 according to heat collector 1 exit variation of temperature, thereby regulate the rotating speed and the flow of water circulating pump 6, make the exit temperature of heat collector 1 remain constant 33 ℃ of the temperature upper limits that preset that are.Concrete adjusting principle is: when the temperature in heat collector 1 exit is tending towards rising, improve the operating frequency of water circulating pump 6, thereby strengthen the rate of discharge of water circulating pump 6, the exit temperature of heat collector 1 is reduced; When the exit of heat collector 1 temperature is tending towards descending, reduce the operating frequency of water circulating pump 6, thereby reduce the rate of discharge of water circulating pump 6, the exit temperature of heat collector 1 is risen.When running into sunshine when not enough (sunshine is blocked by cloud layer or other reasons descends intensity of sunshine), during 30 ℃ of the lowest temperatures of the temperature T 1 in heat collector 1 exit≤preset, frequency converter 7 quits work, water circulating pump 6 stops to supply water to heat collector 1, solar water heating system is in vexed solarization state, when the temperature T 1 in heat collector 1 exit again 〉=during 33 ℃ of the temperature upper limits that preset, restart to control water circulating pump 6 by frequency converter 7 and carry out work, continue to supply water to heat collector 1.The present invention so constantly repeats heating.
The present invention is that the temperature that heat storage water tank 3 circulations are intake has increased restriction control to the temperature T 1 in heat collector 1 exit.Like this, the water temperature that enters heat storage water tank 3 is tending towards constant temperature, thereby can satisfy hot water temperature's requirement of the different occasions of user.Select suitable temperature upper limit T (on) and lowest temperature T (off), can give full play to the collecting efficiency of heat collector 1, thereby service efficiency, service life and the practicality of whole collecting system are improved.
Claims (8)
1. direct-flow type solar water-heating system, comprise heat storage water tank, heat collector, water circulating pump, the heat collector water inlet end is connected with water circulating pump, the heat collector water side is connected with heat storage water tank, be equipped with temperature measuring set in the heat collector exit, it is characterized in that being connected with on the water circulating pump volume control device.
2. direct-flow type solar water-heating system according to claim 1 is characterized in that described volume control device is the frequency converter that is subjected to temperature measuring set control.
3. direct-flow type solar water-heating system according to claim 1 and 2 is characterized in that described temperature measuring set is temperature sensor PT1.
4. direct-flow type solar water-heating system water-flow control method, it is characterized in that it being with the control flow according to the water circulating pump work in temperature T 1 this system of control in the heat collector exit that presets, and reach the temperature T 1 in control heat collector exit with this, reach constant to heat collector exit temperature: when the temperature upper limit T (on) of the temperature T 1 in heat collector exit 〉=preset, by the running of volume control device control water circulating pump, and regulate the flow of water circulating pump according to heat collector exit variation of temperature, make the constant temperature upper limit T (on) of heat collector exit water temperature for presetting; When the lowest temperature T (off) of the temperature T 1 in heat collector exit≤preset, volume control device quits work, and water circulating pump shuts down.
5. direct-flow type solar water-heating system water-flow control method according to claim 4, it is characterized in that described volume control device is a frequency converter, when the temperature upper limit T (on) of the temperature T 1 in heat collector exit 〉=preset, frequency converter is according to heat collector exit variation of temperature, regulate its flow by the operating frequency of regulating water circulating pump, make the constant temperature upper limit T (on) of heat collector exit water temperature: when heat collector exit temperature is tending towards rising for presetting, frequency converter improves the operating frequency of water circulating pump, thereby strengthen the rate of discharge of water circulating pump current, the exit temperature of heat collector is reduced; When heat collector exit temperature was tending towards descending, frequency converter reduced the operating frequency of water circulating pump, thereby reduced the rate of discharge of water circulating pump current, and heat collector exit temperature is raise.
6. according to claim 4 or 5 described direct-flow type solar water-heating system water-flow control methods, it is characterized in that by measure the temperature in heat collector exit at heat collector exit laying temperature sensor PT1.
7. according to claim 4 or 5 described direct-flow type solar water-heating system water-flow control methods, it is characterized in that the span of the temperature gap between temperature upper limit T (on) and the lowest temperature T (off) is 2-6 ℃.
8. according to claim 4 or 5 described direct-flow type solar water-heating system water-flow control methods, the scope that it is characterized in that temperature upper limit T (on) is 30-50 ℃.The scope of lowest temperature T (off) is 25-48 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100804846A CN1892147A (en) | 2005-07-05 | 2005-07-05 | Direct-flow type solar water-heating system and its water-flow control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100804846A CN1892147A (en) | 2005-07-05 | 2005-07-05 | Direct-flow type solar water-heating system and its water-flow control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1892147A true CN1892147A (en) | 2007-01-10 |
Family
ID=37597255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100804846A Pending CN1892147A (en) | 2005-07-05 | 2005-07-05 | Direct-flow type solar water-heating system and its water-flow control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1892147A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519129A (en) * | 2011-12-14 | 2012-06-27 | 西安交通大学 | Chemical pool water heating system by aid of flue gas waste heat recovery and method |
| CN102644963A (en) * | 2012-05-09 | 2012-08-22 | 北京海林节能设备股份有限公司 | Geothermy, solar energy and air conditioning combination temperature control system for comprehensive energy-saving building |
| CN102692088A (en) * | 2011-03-24 | 2012-09-26 | 益科博能源科技（上海）有限公司 | Flow control method for solar heat collector system |
| WO2013067908A1 (en) * | 2011-11-07 | 2013-05-16 | Sun Haixiang | Solar thermal collector apparatus |
| CN106705460A (en) * | 2015-11-16 | 2017-05-24 | 北京兆阳光热技术有限公司 | Control method of supply quantity of heat exchange medium of photo-thermal power station heat collector |
| CN106839460A (en) * | 2015-09-15 | 2017-06-13 | 潍坊强胜新能源有限公司 | The solar energy hot water supply system that gradient discharges water |
| CN109442770A (en) * | 2017-08-31 | 2019-03-08 | 甘肃光热发电有限公司 | A kind of control method improving collecting system collecting efficiency |
-
2005
- 2005-07-05 CN CNA2005100804846A patent/CN1892147A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692088A (en) * | 2011-03-24 | 2012-09-26 | 益科博能源科技（上海）有限公司 | Flow control method for solar heat collector system |
| CN102692088B (en) * | 2011-03-24 | 2013-11-27 | 益科博能源科技（上海）有限公司 | Flow control method for solar heat collector system |
| WO2013067908A1 (en) * | 2011-11-07 | 2013-05-16 | Sun Haixiang | Solar thermal collector apparatus |
| CN102519129A (en) * | 2011-12-14 | 2012-06-27 | 西安交通大学 | Chemical pool water heating system by aid of flue gas waste heat recovery and method |
| CN102644963A (en) * | 2012-05-09 | 2012-08-22 | 北京海林节能设备股份有限公司 | Geothermy, solar energy and air conditioning combination temperature control system for comprehensive energy-saving building |
| CN106839460A (en) * | 2015-09-15 | 2017-06-13 | 潍坊强胜新能源有限公司 | The solar energy hot water supply system that gradient discharges water |
| CN106705460A (en) * | 2015-11-16 | 2017-05-24 | 北京兆阳光热技术有限公司 | Control method of supply quantity of heat exchange medium of photo-thermal power station heat collector |
| CN106705460B (en) * | 2015-11-16 | 2019-08-16 | 北京兆阳光热技术有限公司 | A kind of control method of the heat transferring medium supply amount of photo-thermal power station heat collector |
| CN109442770A (en) * | 2017-08-31 | 2019-03-08 | 甘肃光热发电有限公司 | A kind of control method improving collecting system collecting efficiency |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1892147A (en) | Direct-flow type solar water-heating system and its water-flow control method | |
| CN203629083U (en) | High efficiency solar water heater capable of adjusting temperature | |
| CN207933085U (en) | A kind of solar energy sea water desalination apparatus | |
| CN2869667Y (en) | Multifunction series electric heating apparatus | |
| CN2605528Y (en) | Split duat-water-tank solar electric water heater | |
| CN207975720U (en) | A kind of electric boiler and solar united use heating installation | |
| CN206439904U (en) | Solar electrothermal association type domestic energy-saving heating system | |
| CN200982758Y (en) | Full-automatic intelligent heat-storage cabin of solar energy water heater | |
| CN206329461U (en) | A kind of durable photovoltaic water pump system | |
| CN206146005U (en) | Heat transfer formula solar water heating system with frostproofing cabin | |
| CN205527951U (en) | Energy -saving solar energy constant temperature biochemical reaction basin | |
| CN111336694B (en) | Heat collecting device for collecting solar energy and control method thereof | |
| CN102829558A (en) | Water heater with intelligent temperature adjustment | |
| CN2190265Y (en) | Solar water heater with grooved paraboloid | |
| CN2874356Y (en) | Solar energy floor radiation heating system | |
| CN208475425U (en) | The heating and water system that a kind of solar energy and photovoltaic power generation combine | |
| CN209101579U (en) | A kind of split type directly-heated solar water heater of two storehouse temperature controls | |
| CN208365712U (en) | A kind of cooling/warming system of solar energy integration air source heat pump | |
| CN102759200B (en) | Solar power generating and water heating integral machine | |
| CN220818110U (en) | Angle-adjustable solar water heater | |
| CN111717553A (en) | Oil storage tank heating system | |
| CN205351805U (en) | Solar water dispenser | |
| CN2773514Y (en) | Heat supplier with solar energy and electrical energy combination | |
| CN201599950U (en) | Electric auxiliary heating system of solar water heater | |
| CN202835828U (en) | Gas assisted solar heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |