CN101182940B - Solar hot water supply system and heating means thereof - Google Patents
Solar hot water supply system and heating means thereof Download PDFInfo
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- CN101182940B CN101182940B CN2007101634803A CN200710163480A CN101182940B CN 101182940 B CN101182940 B CN 101182940B CN 2007101634803 A CN2007101634803 A CN 2007101634803A CN 200710163480 A CN200710163480 A CN 200710163480A CN 101182940 B CN101182940 B CN 101182940B
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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
- Y02B10/20—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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- 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
- Y02E10/44—Heat exchange systems
Abstract
The invention discloses a solar-energy hot water supplying system and its heating method, meanwhile, the invention solves the problem that the prior solar-energy water heater takes use of much assistant heat sources. The solar-energy hot water supplying system comprises a solar-energy collector and a water pump as well as at least two water tanks; a circling water outlet of each water tank is connected with an inlet of the water pump and an outlet of the water pump is connected with the inlet of the solar-energy collector, moreover, the outlet of the solar-energy collector is connected with the circling water returning port of each water tank. The heating method is as follows that each water tank is filled with cool water; water in each water tank is heated by the solar-energy collector to the objective temperature. As the invention is provided with a plurality of water tanks, when solar energy is not enough, water in some water tanks can be heated to the objective temperature by solar energy and water with appropriate temperature can be provided; assistant heat source can be saved. The invention can be used in the hot water concentration supplying system of various public buildings or in family to provide water for life.
Description
Technical field
The present invention relates to provide the system of hot water, particularly utilize solar energy to provide the system of hot water after the water heating, and the heating means of this system.
Background technology
In order to satisfy the needs of social sustainable development, must the exploitation new energy that can sustainable utilization, for example: wind energy, water energy, solar energy etc.Wherein the utilization of solar energy has begun to popularize in the numerous common people, and solar water heater is exactly to popularize the equipment that utilizes.
The general thermal storage water tank of employing of present most of solar water heater or a plurality of continuous thermal storage water tank, in use, normal conditions are, though the thermal storage water tank is provided with thermometer, to the supply temperature and the indefinite of hot water, as long as the hot water demand is arranged, the thermal storage water tank just outwards supplies water, along with the minimizing of hot water in the thermal storage water tank, mend cold water at any time simultaneously, the water temperature in the thermal storage water tank is among the variation always.Like this, no matter whether solar thermal energy is sufficient, in use, all is difficult to obtain the constant relatively hot water of water temperature, particularly when solar thermal energy is not enough, often under the little situation of calorific requirement, still need consumes auxiliary heat energy water temperature is risen to required temperature.
Because the setting of solar thermal collector area, thermal storage water tank's volume etc. is according to relevant specification, standard, under a certain specified conditions, determine by calculating, though can satisfy most operating positions in theory, but in running, the actual demand situation of setting of so simple system and hot water is difficult to reach good agreeing with.On the one hand, along with thermal storage water tank's water outlet, cold water is constantly mended, even be provided with guiding device, the leaving water temperature that yet is difficult to good assurance thermal storage water tank does not change, and thermal storage water tank's dischargeable capacity also is subjected to very big influence.On the other hand, when solar thermal energy not abundant, and the user is to the demand of hot water when also also insufficient, though solar thermal energy can provide the user desired heat, but traditional system is because of being that the water in whole hot water storage tanks is heated, in this case, because solar thermal energy can not be heated to whole hot water desired temperature, in order to guarantee the demand of user to hot water, have only and utilize auxiliary heat energy post bake, therefore both can't make full use of solar thermal energy, consume the auxiliary heat energy that originally can save again.
General commonly used solar water heating system as shown in Figure 1, the thermal storage water tank generally is made as one or more according to architectural plane, equipment processing situation, when a plurality of the setting, also be connected by pipeline usually.The common method of operation is: as can be for the solar thermal energy that utilizes the time (the water temperature for the solar thermal collector place of generally imposing a condition is higher than 2～5 ℃ of water temperatures in the thermal storage water tank), circulation heat pump 7 is started working, by the hot water in the solar thermal collector circulation heating thermal storage water tank, less than a certain setting value (as 2～5 ℃), water circulating pump 7 is out of service until the temperature difference of the water temperature at solar thermal collector place and the water temperature in the thermal storage water tank.Thermal storage water tank's circulation water intaking valve 3 and loop back water valve 6 and be in normally open, what the valve 2 on the cold water supply channel 1 generally adopted is the water compensating valve with water level control function, when thermal storage water tank's water level reduced, valve 2 was just opened automatically, to thermal storage water tank's moisturizing.Valve 5 on the hot water feeding pipe road 4 generally is in normally open, and hot water is provided at any time.
Solar water heating system shown in Figure 1, generally need be with waterbox design bigger, when solar energy is not enough, just the water in the water tank can't be heated to design temperature, so just need by the water in the auxiliary thermal source heating water tank, for example: utilize electric heater to heat.But the hot water amount that may need at this moment is also little, water as if the solar energy that can gather being used for heating a less part can make that water temperature reaches design temperature, so, above-mentioned solar water heating system can not make full use of solar energy hot water is provided, and has wasted more supplementary energy.
Summary of the invention
The invention provides a kind of solar energy hot water supply system, to save supplementary energy.
To achieve the above object of the invention, the present invention adopts following technical scheme: this solar energy hot water supply system comprises solar thermal collector and water circulating pump, also comprise at least two water tanks, the circulating outlet of described each water tank is connected to the inlet of water circulating pump by pipeline, described recirculated water delivery side of pump is connected to the inlet of solar thermal collector by pipeline, and the outlet of described solar thermal collector is connected to the mouth of a river that loops back of each water tank by pipeline; The circulating outlet of described each water tank and loop back the mouth of a river and be provided with valve, described each water tank also is provided with cold water inlet and hot water outlet, and described cold water inlet and hot water exit are provided with valve; Stop the water of this heat storage water tank is heated after by solar thermal collector the water in one of them heat storage water tank being heated to design temperature in use, and close the valve of circulating outlet in this heat storage water tank and loop back the valve at the mouth of a river, again the water in another heat storage water tank is heated.
Described solar energy hot water supply system also comprises the self-control thermostatic device; An inlet of described self-control thermostatic device is connected to the hot water outlet of described each water tank by pipeline, and another inlet is introduced cold water, and the outlet of described self-control thermostatic device is connected to main hot-water line by pipeline.
Described solar energy hot water supply system also comprises at least one auxiliary firing equipment; The inlet of described auxiliary firing equipment connects main hot-water line by pipeline, and the outlet of described auxiliary firing equipment is connected to the hot water supply pipe.
Be connected with the storage hot-water cylinder between described auxiliary firing equipment and the hot water supply pipe.
Described solar energy hot water supply system also comprises the dimension warm water pump, and the inlet of described dimension warm water pump connects return pipe, and described dimension warm water delivery side of pump is connected to the import department of auxiliary firing equipment by pipeline, or is connected to the inlet of solar thermal collector.
Cold water required in each pipeline of described solar energy hot water supply system is supplied with by same chilled water system.
Optionally, described solar energy hot water supply system also comprises cold water storage cistern, and the inlet of described cold water storage cistern is introduced cold water, the outlet of described cold water storage cistern is connected to the cold feed pipe, and expansion tube in the described solar energy hot water supply system and pressure relief opening are connected to the top of described cold water storage cistern by pipeline.
Described solar energy hot water supply system is provided with the leaking port that can make the whole emptyings of water in solar thermal collector and the pipeline.
Described water circulating pump and valve by manually, full-automatic or manually control with the mode that combines automatically.
Be provided with at least two water tanks by the described solar energy hot water supply system of technique scheme, and the water in the water tank does not mix mutually, so just can heat the water in one of them water tank earlier, after water temperature reaches design temperature, heat the water in another water tank again, circulate successively the water in the water tank is heated.Thus, when solar energy when being not abundant especially, can utilize the water in one of them water tank of limited solar energy heating, make it reach predetermined temperature, so still, can use the hot water of suitable temperature, and can assist firing equipment to add hot water, for existing solar water heater, reduce the probability that uses auxiliary firing equipment, saved auxiliary thermal source.
The present invention also provides a kind of heating means of solar energy hot water supply system, to save auxiliary thermal source.
For achieving the above object, the present invention adopts following technical scheme: adopt the heating means of described this solar energy hot water supply system of claim 1 to comprise:
Each heat storage water tank is poured into cold water;
By solar thermal collector one of them heat storage water tank is heated to the water heating that stops behind the design temperature this heat storage water tank, and closes the valve of circulating outlet in this heat storage water tank and loop back the valve at the mouth of a river, again to another heat storage water tank heating.
Optionally, the temperature of each heat storage water tank all is heated to design temperature after, heighten design temperature, by solar thermal collector one of them heat storage water tank is heated to design temperature after heightening after, again to another heat storage water tank heating.
The heating means of described solar energy hot water supply system also comprise step:
Water in the heat storage water tank is heated to behind the design temperature again for using, in use, not moisturizing of heat storage water tank, the hot water in heat storage water tank uses up, and mends full cold water again, in order to heating once more.
The heating means of described solar energy hot water supply system also comprise step:
Set the design temperature of output hot water;
If the hot water that heat storage water tank flows out surpasses design temperature, then the hot water with cold water and heat storage water tank outflow mixes, and forms the hot water of design temperature, and exports the hot water of this design temperature;
If the hot water that heat storage water tank flows out is lower than design temperature, then the hot water that water tank is flowed out heats the hot water of back output design temperature again.
The heating means of described solar energy hot water supply system also comprise:
Set the minimum water temperature of hot water supply pipe;
When the water temperature in the hot water supply pipe is lower than minimum water temperature, the water in the hot water supply pipe is drawn back auxiliary firing equipment or solar thermal collector heating.
Heating means by the described solar energy hot water supply system of technique scheme, by solar thermal collector the water in each heat storage water tank once is heated to design temperature, when the water temperature in one of them water tank arrives design temperature, just can use the water of suitable temperature.When the identical hot water amount of needs, therefore the present invention has improved the dischargeable capacity of water tank greatly owing to adopt the constant relatively hot water of single water tank supply temperature.Prior art need be heated to design temperature with water by auxiliary thermal source owing to the water in the water tank can not be heated to design temperature when solar energy is not enough.So, the present invention in the solar energy deficiency and hot water demand amount also little in, can utilize solar energy that the water of part water tank is heated to design temperature, use the water of suitable temperature for the user, thereby saved auxiliary thermal source.
Description of drawings
Fig. 1 is the schematic diagram of solar energy hot water supply system in the prior art;
Fig. 2 is the schematic diagram of solar energy hot water supply system of the present invention.
The specific embodiment
The present invention replaces the large water tank in the solar water heater with a plurality of relatively independent, less water tanks, and heat the water in each water tank successively, make the water in each water tank to heat up quickly, and when solar energy is abundant inadequately, the water of part water tank wherein can be heated to design temperature, under situation without the auxiliary thermal source heating, for the user provides the water of suitable temperature, thereby realize the purpose of saving auxiliary thermal source.
Below in conjunction with accompanying drawing solar energy hot water supply system of the present invention and heating means thereof are described in detail.
As shown in Figure 2, solar energy hot water supply system of the present invention comprises solar thermal collector 10 and water circulating pump 19, also comprise at least two heat storage water tanks 11 (adopting three heat storage water tanks in the present embodiment), described each heat storage water tank 11 is provided with cold water inlet and hot water outlet, the cold water inlet of described each heat storage water tank 11 and hot water exit are provided with valve (the cold water inlet valve is: V41, V42 and V43, the hot water outlet valve is: V31, V32 and V33).The circulating outlet of described each heat storage water tank is connected to the inlet of water circulating pump 19 by pipeline, the outlet of described water circulating pump 19 is connected to the inlet of solar thermal collector by pipeline, and the outlet of described solar thermal collector 10 is connected to the mouth of a river that loops back of each heat storage water tank by pipeline; Described circulating outlet and loop back mouth of a river place and be provided with valve (the circulating outlet valve is: V11, V12 and V13 loop back mouth of a river valve and be: V21, V22 and V23).
Open valve V43, V42 and the V41 of cold water inlet successively, in heat storage water tank, fill with cold water successively, close the valve of cold water inlet then, open the valve V11 and the valve V21 that loops back the mouth of a river of circulating outlet in first heat storage water tank successively, by water circulating pump 19 water in the heat storage water tank is extracted in the solar thermal collector 10, then by solar thermal collector 10 absorption solar energy, and with the conversion of solar energy that absorbs is the heat energy of water, and water temperature is risen; Water is back in the heat storage water tank by looping back the mouth of a river after heating up.Continuous firing along with water circulating pump 19, make the water temperature in the heat storage water tank constantly rise, up to reaching design temperature, can stop water heating, and close the valve V11 and the valve V21 that loops back the mouth of a river of circulating outlet in first heat storage water tank this heat storage water tank; Open the valve V12 and the valve V22 that loops back the mouth of a river of circulating outlet in second heat storage water tank then, to the heating of the water in second heat storage water tank, close the valve V12 and the valve V22 that loops back the mouth of a river of circulating outlet in second heat storage water tank after finishing; Open the valve V13 and the valve V23 that loops back the mouth of a river of circulating outlet in the 3rd heat storage water tank then, to the heating of the water in the 3rd heat storage water tank, close the valve V13 and the valve V23 that loops back the mouth of a river of circulating outlet in the 3rd heat storage water tank after finishing.
After heating water in the heat storage water tank successively and reach design temperature by solar thermal collector, close circulating outlet and loop back place, the mouth of a river and be provided with valve, can open valve V31, V32 or the V33 of hot water outlet, to obtain the hot water in the heat storage water tank.
Solar energy hot water supply system of the present invention is provided with at least two heat storage water tanks, and the water in the heat storage water tank do not mix mutually, and when the identical moisture storage capacity of needs, the heat storage water tank of solar energy hot water supply device of the present invention can be little more a lot of than existing heat storage water tank.So just can heat the water in one of them heat storage water tank earlier, after water temperature reaches design temperature, heat the water in another heat storage water tank again, circulate successively the water in the heat storage water tank is heated.Thus, when solar energy is not enough, can utilize the water in one of them heat storage water tank of limited solar energy heating, make it reach predetermined temperature, so still, can use the hot water of suitable temperature, and can assist firing equipment to add hot water, for existing solar water heater, reduce the probability that uses auxiliary firing equipment, saved auxiliary thermal source.
Solar energy hot water supply system of the present invention also comprises self-control thermostatic device 14 (present embodiment adopts pressure type self-control thermostatic device), the cold water inlet of described each heat storage water tank is connected to main cold water pipe 12 by pipeline, by main cold water pipe 12 cold water is injected heat storage water tank 11.An inlet of described pressure type self-control thermostatic device 14 is connected to described each heat storage water tank 11 by pipeline.Hot water outlet, another inlet is connected to main cold water pipe 12 by pipeline, outlet is connected to main hot-water line 13 by pipeline, like this will mixed hot water and cold water in pressure type self-control thermostatic device, this pressure type self-control thermostatic device can mix according to different proportion by control cold water and hot water, thereby adjust the temperature of pressure type self-control thermostatic device output water, guarantee that the hot water that outputs to main hot-water line is in the temperature that relatively more suitable people uses, for example 40 ℃.
When solar energy is not enough, when perhaps the rainy day does not have solar energy, at this moment because the temperature of hot water does not reach the temperature that suitable people uses yet, for the water that guarantees last output can reach the temperature that suitable people uses, solar energy hot water supply system of the present invention also comprises storage hot-water cylinder 16 and at least one auxiliary firing equipment 15; The inlet of described auxiliary firing equipment 15 is connected to main hot-water line 13 by pipeline, and the outlet of described auxiliary firing equipment 15 is connected to the inlet of storing hot-water cylinder 16 by pipeline, and the outlet of described storage hot-water cylinder is connected with the hot water supply pipe.Can the water that pressure type self-control thermostatic device 14 outputs to main hot-water line 13 be heated once more by above-mentioned auxiliary firing equipment 15, make it reach the temperature that suitable people uses, and be stored in the storage hot-water cylinder 16, and be transported in the hot water supply pipe.When sunny, the water of pressure type self-control thermostatic device 14 output has reached the temperature that suitable people uses, and hot water will be by auxiliary firing equipment 15 so, but auxiliary firing equipment 15 do not heat it, just is transported to and stores in the hot-water cylinder.When solar energy is not enough, can also be with assisting the direct and main hot-water line of firing equipment to be connected, so that hot water is heated once more.Certainly, in native system, when sunny, the water of pressure type self-control thermostatic device 14 outputs has reached the temperature that suitable people uses, and hot water also can be delivered directly in the storage hot-water cylinder for use not by auxiliary firing equipment 15.
Described auxiliary firing equipment 15 is for assisting the heating agent water heater, can being electric heater, gas heater, volumetric heat exchanger, half-volume type heat exchanger, instant heat exchanger or the like.
If directly supply with in the hot water supply pipe that the user uses hot water for a long time not flowing temperature will descend gradually, become cold water, can make so each water what flow out for the previous period is cold water, and the user generally need not this low temperature water, just wait until the cold water in the hot water supply pipe put after, re-use the hot water that flows out later, cause water resource waste.In order to prevent that above-mentioned phenomenon from taking place, solar energy hot water supply system of the present invention also comprises dimension warm water pump 17, the inlet of described dimension warm water pump 17 is connected to the end of hot water supply system by return pipe, the outlet of described dimension warm water pump 17 is connected to the import department of assisting firing equipment by pipeline, perhaps is connected to the inlet of solar thermal collector 10.
Cold water in the hot water supply pipe can be extracted in the main hot-water line 13 by above-mentioned dimension warm water pump 17, auxiliary like this firing equipment 15 or solar thermal collector 10 can heat once more to the cold water of drawing back, and be stored in the storage hot-water cylinder 16, be transported in the hot water supply pipe by the water of storing after hot-water cylinder 16 will heat once more, to guarantee that the water in the hot water supply pipe maintains on the temperature of suitable people's use, can guarantee that like this water that flows out all the time all is hot water, avoid user's waste water resource.
Solar energy hot water supply system of the present invention also comprises cold water storage cistern 18, and the inlet of described cold water storage cistern 18 is introduced cold water, and outlet is connected to bathing cold water feed pipe 12, and wherein cold water storage cistern also has following effect:
1, make in the bathing water system, the pressure of supply water of hot water and cold water and pressure thereof change balance as much as possible.Thereby guarantee with the requirement of water spot to the hot water comfort.
2, make the native system can both be well suited for single-tube water or these two kinds of hot water methods of supplying of two-tube water supply.
3, reduce as much as possible in the hot-water heating system running the non-life of water used and consume, reduce equipment investment, after cold water storage cistern is set, can consider not to be provided with expansion drum, the water yield that expands be let out to cold water storage cistern by the expansion pipeline in the solar energy hot water supply system, relief valve.
Need to prove, difference as the case may be, this solar water concentrates feed system that closed system and these two kinds of basic applicable cases of open system can be arranged.For open system, cold water storage cistern be provided with requirement will with boiler be provided with the height basically identical; For closed system, has only enclosed boiler (or being called the hot water storing tank of pressure type) generally speaking, for pressure of supply water and the pressure thereof of realizing hot water and cold water changes the purpose that balances each other as far as possible, require cold water and hot water to supply water under the normal condition by same water system.No matter open system or closed system, bath system cold water supply channel should adopt the identical principle of laying as much as possible with the layout on hot water feeding pipe road.
Use solar energy hot water supply system of the present invention in winter, because solar thermal collector is to be in outdoorly, when temperature was low at night, the water capacity in the solar thermal collector easily was frozen in, and will influence the normal operation of system like this at second day.In order to prevent that the water in the solar thermal collector is frozen in, when winter, can be with one of them water tank in a plurality of water tanks as the emptying case, just at night the time, water in the solar thermal collector all is discharged in this water tank, just do not have water at night in the solar thermal collector, be in outdoor solar thermal collector and just can be damaged by frost.
In order to prevent that solar thermal collector 10 is damaged by frost, and can also adopt following scheme: the porch of described solar thermal collector 10 is provided with leaking port 20, and this leaking port 20 can be connected to drainage system by pipeline.Thus, just can the water in the solar thermal collector 10 all be discharged in the drainage system, be frozen at night to prevent solar thermal collector 10 by this leaking port 20.Certainly, when running into the solar thermal collector fault, for example: because long time integration, make that incrustation scale is too many in the thermal-collecting tube of solar thermal collector, cause that to add thermal effect low, at this moment just need safeguard the thermal-collecting tube in the solar thermal collector, before maintenance, can be by the water in these leaking port 20 emptying solar thermal collectors.
Certainly, solar thermal collector is adopted the heat collector of anti-icing fluid heat exchange instead, also can reach antifreezing effect.During specific implementation, need to increase heat exchanger is set, a solar thermal collector heating and anti-freezing liquid then by water circulating pump, heat exchanger, respective line, heats water storage in the heat storage water tank in the mode of closed cycle heat exchange.
The control of described system can by manually, full-automatic, manually realize with the mode that combines automatically.
The heating means of solar energy hot water supply system of the present invention comprise the steps:
At first, each water tank be filled cold water, the valve of opening the cold water inlet of one of them water tank can inject water tank with cold water, when the water level in the water tank reaches peak level, can be with the valve closing of cold water inlet, and by same operation water filling in another water tank.
Secondly, heat water in each water tank successively by solar thermal collector, by water pump the water in the water tank is extracted in the solar thermal collector and heats, draw recovery tank then, can after the water temperature of a water tank reaches design temperature therein, the water in the next water tank be heated so that the water temperature in the water tank raises by this continuous water circulation, and the like, the water temperature in all water tanks all reaches design temperature.
The present invention can reduce the volume of each water tank because a plurality of water tanks are arranged, and the water programming rate in each water tank is fast like this.Prior art can not be heated to design temperature because the too big or a plurality of water tanks of water tank are communicated with the water in the water tank when solar energy is not abundant especially, need water be heated to design temperature by auxiliary thermal source.So the present invention can utilize solar energy that the water of part water tank is heated to design temperature when solar energy is not abundant especially, uses the water of suitable temperature for the user, thereby has saved auxiliary thermal source.
Comparatively constant in order to guarantee the water temperature in each water tank, generally need to set the design temperature that heats in each water tank, this temperature can be determined according to the same day sunlight situation and user demand, normal condition is set in 60 ℃, that can set when sunlight is more abundant is higher, to make full use of solar energy.
In order to make full use of solar energy, that generally the target water temperature of water tank can be set is higher, but during actual the use, do not need so high water temperature, so for the water temperature that provides a suitable people to use, the heating means of solar energy hot water supply device of the present invention also comprise the steps: to be provided with the design temperature in the pressure type self-control thermostatic device; Hot water in cold water and the water tank all is transported in the pressure type self-control thermostatic device, and the hot water that in pressure type self-control thermostatic device cold water and any one water tank is flowed out mixes, be mixed into design temperature after, the hot water of output design temperature.
When solar energy was not abundant, the water temperature in the water tank did not just reach the temperature of demand originally, so the present invention can also can export hot water by after assisting firing equipment be heated to design temperature again with the hot water of pressure type self-control thermostatic device output.
Having had above-mentioned step can guarantee to supply with the water that the user uses must be to reach the hot water that design temperature requires.
Certainly, the water temperature of the hot water by pressure type self-control thermostatic device output is fixed, but the water temperature of everyone required use is different, in order to adapt to the requirement of majority to water temperature, so the present invention also is provided with the cold feed pipe at final water delivery port, the user can manual adjustments hot water and the mixed proportion of cold water, regulates suitable oneself water temperature.
Owing to directly supply with hot water in the hot water supply pipe of user's use in time spent not for a long time, if do not consider the circulation heating, temperature will descend gradually, become cold water, can make so each water what flow out for the previous period is cold water, and the water that the user generally need not this low temperature, just wait until the cold water in the hot water supply pipe put after, re-use the hot water that flows out later, cause water resource waste.In order to prevent that above-mentioned phenomenon from taking place, the heating means of solar energy hot water supply system of the present invention also comprise: the minimum water temperature of setting the hot water supply pipe; When the water temperature in the hot water supply pipe is lower than minimum water temperature, the firing equipment heating of the water in the hot water supply pipe being drawn go back to system, and be transported in the hot water supply pipe, to guarantee that the water in the hot water supply pipe maintains on the temperature of suitable people's use, can guarantee that like this water that flows out all the time all is hot water, avoid user's waste water resource.Cold water can be drawn for general less solar energy hot water supply system and to get back to auxiliary firing equipment, then can consider just cold water to be drawn to get back to solar thermal collector for bigger solar energy hot water supply system, to make full use of solar energy.
Solar energy hot water supply system of the present invention and heating means can be used in the water system of various venues, office building, office building, teaching building etc., also can be with domestic water is provided in the family.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (14)
1. solar energy hot water supply system, comprise solar thermal collector and water circulating pump, it is characterized in that, also comprise at least two heat storage water tanks, the circulating outlet of described each heat storage water tank is connected to the inlet of water circulating pump by pipeline, described recirculated water delivery side of pump is connected to the inlet of solar thermal collector by pipeline, and the outlet of described solar thermal collector is connected to the mouth of a river that loops back of each heat storage water tank by pipeline; The circulating outlet of described each heat storage water tank and loop back the mouth of a river and be provided with valve, described each heat storage water tank also is provided with cold water inlet and hot water outlet, and described cold water inlet and hot water exit are provided with valve; Stop the water of this heat storage water tank is heated after by solar thermal collector the water in one of them heat storage water tank being heated to design temperature in use, and close the valve of circulating outlet in this heat storage water tank and loop back the valve at the mouth of a river, again the water in another heat storage water tank is heated.
2. solar energy hot water supply system according to claim 1 is characterized in that, also comprises the self-control thermostatic device; An inlet of described self-control thermostatic device is connected to the hot water outlet of described each heat storage water tank by pipeline, and another inlet is introduced cold water, and the outlet of described self-control thermostatic device is connected to main hot-water line by pipeline.
3. solar energy hot water supply system according to claim 2 is characterized in that, also comprises at least one auxiliary firing equipment; The inlet of described auxiliary firing equipment connects main hot-water line by pipeline, and the outlet of described auxiliary firing equipment is connected to the hot water supply pipe.
4. solar energy hot water supply system according to claim 3 is characterized in that, is connected with the storage hot-water cylinder between described auxiliary firing equipment and the hot water supply pipe.
5. solar energy hot water supply system according to claim 4, it is characterized in that, also comprise the dimension warm water pump, the inlet of described dimension warm water pump connects return pipe, described dimension warm water delivery side of pump is connected to the import department of auxiliary firing equipment by pipeline, or is connected to the inlet of solar thermal collector.
6. solar energy hot water supply system according to claim 4 is characterized in that, cold water required in each pipeline is supplied with by same chilled water system.
7. solar energy hot water supply system according to claim 4, it is characterized in that, also comprise cold water storage cistern, the inlet of described cold water storage cistern is introduced cold water, the outlet of described cold water storage cistern is connected to the cold feed pipe, and expansion tube in the described solar energy hot water supply system and pressure relief opening are connected to the top of described cold water storage cistern by pipeline.
8. according to claim 6 or 7 described solar energy hot water supply systems, it is characterized in that described solar energy hot water supply system is provided with the leaking port that can make the whole emptyings of water in solar thermal collector and the pipeline.
9. solar energy hot water supply system according to claim 1 is characterized in that, described water circulating pump and valve by manually, full-automatic or manually control with the mode that combines automatically.
10. heating means that adopt the described solar energy hot water supply system of claim 1 is characterized in that comprising step:
Each heat storage water tank is poured into cold water;
By solar thermal collector one of them heat storage water tank is heated to the water heating that stops behind the design temperature this heat storage water tank, and closes the valve of circulating outlet in this heat storage water tank and loop back the valve at the mouth of a river, again to another heat storage water tank heating.
11. the heating means of solar energy hot water supply system according to claim 10 is characterized in that also comprising step:
After the temperature of each heat storage water tank all is heated to design temperature, heighten design temperature, by solar thermal collector one of them heat storage water tank is heated to design temperature after heightening after, again to another heat storage water tank heating.
12. the heating means according to claim 10 or 11 described solar energy hot water supply systems is characterized in that also comprising step:
Water in the heat storage water tank is heated to behind the design temperature again for using, in use, not moisturizing of heat storage water tank, the hot water in heat storage water tank uses up, and mends full cold water again, in order to heating once more.
13. the heating means according to claim 10 or 11 described solar energy hot water supply systems is characterized in that also comprising step:
Set the predetermined temperature of output hot water;
If the hot water that heat storage water tank flows out surpasses predetermined temperature, then the hot water with cold water and heat storage water tank outflow mixes, and forms the hot water of predetermined temperature, and exports the hot water of this predetermined temperature;
If the hot water that heat storage water tank flows out is lower than predetermined temperature, then the hot water that water tank is flowed out heats the hot water of back output predetermined temperature again.
14. the heating means of solar energy hot water supply system according to claim 13 is characterized in that also comprising step:
Set the minimum water temperature of hot water supply pipe;
When the water temperature in the hot water supply pipe is lower than minimum water temperature, the water in the hot water supply pipe is drawn back auxiliary firing equipment or solar thermal collector heating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101634803A CN101182940B (en) | 2007-10-26 | 2007-10-26 | Solar hot water supply system and heating means thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101634803A CN101182940B (en) | 2007-10-26 | 2007-10-26 | Solar hot water supply system and heating means thereof |
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| Publication Number | Publication Date |
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| CN101182940A CN101182940A (en) | 2008-05-21 |
| CN101182940B true CN101182940B (en) | 2010-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102313397B (en) * | 2011-09-24 | 2014-01-01 | 广东美的电器股份有限公司 | Water heating machine system of heat recovery multi-gang heat pump air conditioner |
| CN104833110B (en) * | 2015-06-01 | 2017-01-18 | 东南大学 | Efficient solar water heater |
| CN106482209B (en) * | 2016-12-19 | 2020-07-21 | 大连圣鼎工业装备有限公司 | Multifunctional system on-line intelligent water heater unit |
| CN108799610A (en) * | 2017-04-28 | 2018-11-13 | 青岛经济技术开发区海尔热水器有限公司 | A kind of constant-temperature constant-current water outlet control method and constant-temperature constant-current valve |
| CN107084425A (en) * | 2017-06-21 | 2017-08-22 | 宝莲华新能源技术（上海）股份有限公司 | A kind of energy-saving protective device suitable for solar thermal collection system |
| CN108487381A (en) * | 2018-03-22 | 2018-09-04 | 云南航天工业有限公司 | A kind of Intelligent shower case group system |
| CN110454853A (en) * | 2019-08-23 | 2019-11-15 | 北京中环合创环保能源科技有限公司 | A kind of high altitudes and cold area central solar heating system |
| CN112797650A (en) * | 2020-12-30 | 2021-05-14 | 真木农业设备（安徽）有限公司 | Novel pressure-bearing water tank |
| CN112665199A (en) * | 2020-12-30 | 2021-04-16 | 真木农业设备（安徽）有限公司 | Solar water heating system and control method thereof |
| CN115235127A (en) * | 2022-07-21 | 2022-10-25 | 西京学院 | Green hot and humid formula grit screening system |
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