CN1275704A - Forced circulation type water circulation control method for solar energy water heater - Google Patents
Forced circulation type water circulation control method for solar energy water heater Download PDFInfo
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- CN1275704A CN1275704A CN 99108243 CN99108243A CN1275704A CN 1275704 A CN1275704 A CN 1275704A CN 99108243 CN99108243 CN 99108243 CN 99108243 A CN99108243 A CN 99108243A CN 1275704 A CN1275704 A CN 1275704A
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- temperature
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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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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The water flow cycle control method of forced cycle type solar water-heating device is characterized by that it not only can make periodic work according to the temp. difference between the temp. of collector outlet and temp. of water in the hot water storage tank, but also can make coordinated control according to the temp. of collector outlet, so that its operation efficiency, service life, cold-resistance and practivity are raised.
Description
The present invention relates to the water circulation control method of forced circulation formula solar water heater, belong to the current control mode field of solar water heater.
Existing forced circulation formula solar water heater water circulation control method is to control opening, stopping of water circulating pump according to the temperature difference between the temperature of water in the temperature in heat collector exit and the thermal storage water tank, and carries out hydronic.This forced circulation formula water heater collecting efficiency is higher, but under several situations, its weak point is arranged: at first, because in solar water heater, water temperature delamination phenomenon in the thermal storage water tank is comparatively obvious, and the installation site height of the temperature sensor T2 in the thermal storage water tank is bigger to the working condition influence of system.What temperature sensor T2 was reflected is the water temperature of the layer of T2 position in the thermal storage water tank.If the installation site of temperature sensor T2 is higher, the temperature value that is reflected is also high, and then systemic circulation work is just slower, and collecting efficiency is on the low side.If the installation site of temperature sensor T2 is lower, situation is then opposite.Usually people are installed in temperature sensor T2 lower position, thermal storage water tank bottom, to obtain higher collecting efficiency, but sometimes usually may also very high (as more than 40 ℃) in the thermal storage water tank than the temperature of the water on upper strata, and may very low (as below 20 ℃) than the temperature of the water of lower floor the thermal storage water tank, only come the low-temperature circulating water stream of work will mix and mix thermal storage water tank interior upper strata hot water and lower floor's cold water by temperature approach (common 6～10 ℃), make this upper strata hot water temperature applicatory reduce rapidly, this morning in the winter time, maybe when taking hot water, mend into thermal storage water tank's cold water temperature when low, situation is particularly evident, and this reduces the practicality of system.In addition, arranged the freezing time winter, light strengthens after daybreak, and heat collector heats up very fast, and the water circulating pump starting is also just fast, and at this moment the part of circulation line etc. also has freezing obstruction probably, causes the system failure easily, even phenomenon such as water pump damage.Secondly, for the bigger system of heat collector area, the size of the control temperature difference that presets also has considerable influence to the work of system, if the control temperature difference of setting is bigger, when the water temperature in the thermal storage water tank was higher, water pump was difficult for starting, and system's collecting efficiency is on the low side; If the control temperature difference of setting is less, then when the water temperature in the thermal storage water tank is low, can cause the water pump stream time long, influence weak points such as service life.
The objective of the invention is to overcome the deficiency of prior art, a kind of water circulation control method of the forced circulation formula solar water heater by the control of temperature and temperature difference double action is provided.
The present invention is achieved in that in the forced circulation formula solar water heater shown in the accompanying drawing 1, as the lowest temperature t of the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, forbid water circulating pump 6 work by controller 7 controls; Temperature upper limit t as the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 〉=preset
On, the temperature difference upper limit Δ t of and the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2 〉=preset
OnThe time, by controller 7 control start cycles water pumps 6, make working media flow through from thermal storage water tank 3 bottom circulation pipe 8, check-valves 5, heat collector 1, get back to thermal storage water tank 3 top through heat collector outlet pipe 2 again, so circulation is heated, until the temperature difference lower limit Δ t of the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that be reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2≤preset
Off, the lowest temperature t of or the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, by 6 runnings of controller 7 controls stopping water circulating pump.Water heater of the present invention so constantly repeats heating.
Accompanying drawing 1 is the used forced circulation formula of the present invention solar water heater..1 is that heat collector, 2 is that heat collector outlet pipe, 3 is that thermal storage water tank, 4 is that heat supply water pipe, 5 is that check-valves, 6 is that water circulating pump, 7 is that controller, 8 is that circulation pipe, 9 is the cold water filling pipe among the figure.
The present invention is described below below in conjunction with accompanying drawing:
Embodiment one:
To life hot water, desirable predetermined temperature value t1 lower limit t
Off=40 ℃, predetermined temperature value t1 upper limit t
On=43 ℃; Predetermined temperature difference upper limit Δ t
On, lower limit Δ t
Off,, can obtain more less (as capping Δ t owing to have to restriction control according to the temperature t 1 in heat collector 1 exit
On=6～8 ℃, lower limit Δ t
Off=3～5 ℃).Lowest temperature t as the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, forbid water circulating pump 6 work by controller 7 controls; Temperature upper limit t as the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 〉=preset
On, the temperature difference upper limit Δ t of and the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2 〉=preset
OnThe time, by controller 7 control start cycles water pumps 6, make working media flow through from thermal storage water tank 3 bottom circulation pipe 8, check-valves 5, heat collector 1, get back to thermal storage water tank 3 top through heat collector outlet pipe 2 again, so circulation is heated, until the temperature difference lower limit Δ t of the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that be reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2≤preset
Off, the lowest temperature t of or the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, by 6 runnings of controller 7 controls stopping water circulating pump.Water heater of the present invention so constantly repeats heating.
Embodiment two:
To heated swimming pool, desirable predetermined temperature lower limit t
Off=30 ℃, predetermined temperature upper limit t
On=33 ℃.Predetermined temperature difference upper limit Δ t
On, lower limit Δ t
Off,, can obtain more less (as capping Δ t owing to have to restriction control according to the temperature t 1 in heat collector 1 exit
On=6～10 ℃, lower limit Δ t
Off=3～6 ℃).Lowest temperature t as the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, forbid water circulating pump 6 work by controller 7 controls; Temperature upper limit t as the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 〉=preset
On, the temperature difference upper limit Δ t of and the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2 〉=preset
OnThe time, by controller 7 control start cycles water pumps 6, make working media flow through from thermal storage water tank 3 bottom circulation pipe 8, check-valves 5, heat collector 1, get back to thermal storage water tank 3 top through heat collector outlet pipe 2 again, so circulation is heated, until the temperature difference lower limit Δ t of the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that be reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2≤preset
Off, the lowest temperature t of or the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, by 6 runnings of controller 7 controls stopping water circulating pump.Water heater of the present invention so constantly repeats heating.
The present invention is owing to the temperature t 1 to heat collector 1 exit, and promptly the temperature to thermal storage water tank's 3 circulation water inlets has increased restriction control, the upper limit Δ t of predetermined temperature difference
On, lower limit Δ t
OffCan obtain less.When the temperature t 2 of the water in the thermal storage water tank 3 is hanged down, the circulation of water heater working medium in fact mainly is to carry out work according to the temperature t 1 in heat collector 1 exit, thereby reduced the influence of temperature sensor T2 installation site height, reduced effectively and stirred coldly, and alleviated the excessive work of water circulating pump 6 when the working media temperature is low the mixing of thermal storage water tank's 3 top hot water is cold.When the temperature t 2 of the water in the thermal storage water tank 3 is higher, the circulation of water heater working medium then mainly is to carry out work according to the temperature difference t1-t2 between the temperature t 2 of the water in the temperature t 1 in heat collector 1 exit and the thermal storage water tank 3, selected less work temperature difference upper limit Δ t
OnAnd temperature difference lower limit Δ t
OffCan give full play to the collecting efficiency of water heater the time than elevated operating temperature.Thereby service efficiency, freezing tolerance, service life and the practicality of system are improved.
Claims (1)
1. the water circulation control method of a forced circulation formula solar water heater, it is characterized in that: the water circulating pump in this forced circulation formula control system of solar energy water heater is to carry out work by temperature difference t1-t2 between the temperature t 2 of the water in the temperature t 1 in predetermined heat collector 1 exit and the thermal storage water tank 3 and the temperature t 1 dual foundation of being scheduled to as required; Lowest temperature t as the temperature value t1 in heat collector 1 exit that temperature sensor T1 is reflected≤preset
OffThe time, by 6 work of controller 7 controls stopping water circulating pump; Temperature upper limit t as the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 〉=preset
On, the temperature difference upper limit Δ t of and the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2 〉=preset
OnThe time, by controller 7 control start cycles water pumps 6, make working media flow through from thermal storage water tank 3 bottom circulation pipe 8, check-valves 5, heat collector 1, get back to thermal storage water tank 3 top through heat collector outlet pipe 2 again, so circulation is heated, until the temperature difference lower limit Δ t of the temperature difference t1-t2 between the temperature value t2 of the water in the temperature value t1 in heat collector 1 exit that be reflected by temperature sensor T1 and the thermal storage water tank 3 that reflected by temperature sensor T2≤preset
Off, the lowest temperature t of or the temperature value t1 in heat collector 1 exit that is reflected by temperature sensor T1≤preset
OffThe time, by 6 runnings of controller 7 controls stopping water circulating pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99108243 CN1111688C (en) | 1999-06-01 | 1999-06-01 | Forced circulation type water circulation control method for solar energy water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99108243 CN1111688C (en) | 1999-06-01 | 1999-06-01 | Forced circulation type water circulation control method for solar energy water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1275704A true CN1275704A (en) | 2000-12-06 |
| CN1111688C CN1111688C (en) | 2003-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99108243 Expired - Fee Related CN1111688C (en) | 1999-06-01 | 1999-06-01 | Forced circulation type water circulation control method for solar energy water heater |
Country Status (1)
| Country | Link |
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| CN (1) | CN1111688C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100470435C (en) * | 2005-09-30 | 2009-03-18 | Smc株式会社 | Constant temperature liquid circulating device and method of controlling thereof |
| CN101226001B (en) * | 2008-01-24 | 2010-11-10 | 殷浩 | Solar water heating system and intelligent control method thereof |
| CN101089510B (en) * | 2006-06-15 | 2010-12-08 | 海尔集团公司 | Secondary circulation solar water heater |
| CN101949556A (en) * | 2010-09-08 | 2011-01-19 | 深圳市嘉普通太阳能有限公司 | Hot water supply system and method using solar energy preferentially |
| CN101666547B (en) * | 2008-09-02 | 2014-01-15 | 潘戈 | Anti-freezing cyclic solar heat collecting system with small flow |
| CN105588348A (en) * | 2016-02-18 | 2016-05-18 | 南宁市新双源节能科技有限责任公司 | Full-automatic energy saving controller of solar water heater |
| CN106288433A (en) * | 2016-08-25 | 2017-01-04 | 国网上海节能服务有限公司 | A kind of solar water heating system |
| CN109442760A (en) * | 2018-12-14 | 2019-03-08 | 莱西市产业技术研究院 | A kind of energy-saving solar heat collector and its application method |
| CN113883590A (en) * | 2021-11-10 | 2022-01-04 | 西安建筑科技大学 | Flexible control method and system for solar heating |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033889B (en) * | 2006-03-09 | 2011-01-26 | 海尔集团公司 | Water leakage prevention split pressure-bearing direct circulation solar water heater |
-
1999
- 1999-06-01 CN CN 99108243 patent/CN1111688C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100470435C (en) * | 2005-09-30 | 2009-03-18 | Smc株式会社 | Constant temperature liquid circulating device and method of controlling thereof |
| CN101089510B (en) * | 2006-06-15 | 2010-12-08 | 海尔集团公司 | Secondary circulation solar water heater |
| CN101226001B (en) * | 2008-01-24 | 2010-11-10 | 殷浩 | Solar water heating system and intelligent control method thereof |
| CN101666547B (en) * | 2008-09-02 | 2014-01-15 | 潘戈 | Anti-freezing cyclic solar heat collecting system with small flow |
| CN101949556A (en) * | 2010-09-08 | 2011-01-19 | 深圳市嘉普通太阳能有限公司 | Hot water supply system and method using solar energy preferentially |
| CN101949556B (en) * | 2010-09-08 | 2012-11-14 | 深圳市嘉普通太阳能有限公司 | Hot water supply system and method using solar energy preferentially |
| CN105588348A (en) * | 2016-02-18 | 2016-05-18 | 南宁市新双源节能科技有限责任公司 | Full-automatic energy saving controller of solar water heater |
| CN106288433A (en) * | 2016-08-25 | 2017-01-04 | 国网上海节能服务有限公司 | A kind of solar water heating system |
| CN109442760A (en) * | 2018-12-14 | 2019-03-08 | 莱西市产业技术研究院 | A kind of energy-saving solar heat collector and its application method |
| CN113883590A (en) * | 2021-11-10 | 2022-01-04 | 西安建筑科技大学 | Flexible control method and system for solar heating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1111688C (en) | 2003-06-18 |
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