CN114593454B - Solar photo-thermal coupling flexible heat storage and supply system - Google Patents
Solar photo-thermal coupling flexible heat storage and supply system Download PDFInfo
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- CN114593454B CN114593454B CN202210130468.7A CN202210130468A CN114593454B CN 114593454 B CN114593454 B CN 114593454B CN 202210130468 A CN202210130468 A CN 202210130468A CN 114593454 B CN114593454 B CN 114593454B
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- 238000005338 heat storage Methods 0.000 title claims abstract description 99
- 230000008878 coupling Effects 0.000 title claims abstract description 16
- 238000010168 coupling process Methods 0.000 title claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 106
- 238000010248 power generation Methods 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 54
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
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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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
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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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- Sustainable Energy (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to the field of building energy conservation, in particular to a solar photo-thermal coupling flexible heat storage and supply system, which comprises: the heat collection unit comprises a solar heat collector and a heat storage water tank and is used for collecting and converting solar energy into heat energy to be stored; the power generation and heat storage unit comprises a photovoltaic heat collection device, a direct-current variable-frequency heat pump and a flexible heat storage module, and is used for converting electric energy into heat energy; the central control unit is used for adjusting each component in each unit to ensure sufficient heating of the area, ensuring sufficient heating of all the areas and reasonably distributing system heating to save electric power.
Description
Technical Field
The invention relates to the field of building energy conservation, in particular to a solar photo-thermal coupling flexible heat storage and supply system.
Background
Solar energy is a widely used low-carbon energy-saving technology, and has the problems of low efficiency, uneven energy density, high manufacturing cost and the like. The solar photo-thermal utilization is to collect solar radiation energy and convert the solar radiation energy into heat energy for utilization through interaction with substances, but the heat energy generated by the solar photo-thermal utilization is low in quality, the application range is single, the solar photo-thermal utilization can only be used for heating in winter or hot water supply, the solar radiation energy cannot be used for refrigerating in summer, and the utilization rate of the whole system is low; and the heat density is lower, the occupied area is large, the manufacturing cost is high, and the heat supply enterprise transformation development requirement is not met. The photoelectric utilization of solar energy is to convert solar radiation energy photons into electric energy through semiconductor materials, and the electric energy serving as high-quality energy can be used for electric equipment for heating and cooling, and is not limited by seasons.
Chinese patent publication No. CN101907321B discloses a solar heating device for villages and towns, comprising: a solar heat supply device and a water heating stove as an auxiliary heat source; the water heating furnace body comprises: fire cover, adjustable fire cover, bypass flue, heat absorbing sheet, ash bucket and water tank; the furnace body is arranged at the center of the upper part of the water tank of the device, and an ash bucket is arranged at the 2/3 height of the water tank and positioned below the furnace body; the solar heating device comprises: the solar energy return pipeline is provided with a photoelectric pump, a heat exchange coil pipe can be arranged in the water tank, and hot water heated by the solar energy collector directly enters the water tank or cold water in the lower part of the water tank is heated by the heat exchange coil pipe.
It can be seen that the above technical solution has the following problems:
1. the problem of energy deficiency and uneven caused by heating by using solar energy only;
2. the problem of insufficient heating caused by the fact that the regional heating condition cannot be detected and processed.
Disclosure of Invention
Therefore, the invention provides a solar photo-thermal coupling flexible heat storage and supply system, which is used for solving the problem that the heat supply is insufficient due to the fact that the heat supply condition of a region cannot be detected and processed in the prior art.
In order to achieve the above object, the present invention provides a solar photo-thermal coupling flexible heat storage and supply system, comprising:
the heat collection unit comprises a solar heat collector and a heat storage water tank and is used for collecting and converting solar energy into heat energy to be stored;
the power generation and heat storage unit comprises a photovoltaic heat collection device, a direct-current variable-frequency heat pump and a flexible heat storage module, and is used for converting electric energy into heat energy;
the heating unit is connected with the solar heat collection unit and the photovoltaic direct-current power generation heat storage unit and is used for transferring heat energy to a user area, wherein the municipal heating unit comprises two plate heat exchangers which are respectively connected with a heating building and a municipal heat network;
the central control unit is connected with the units and is used for detecting corresponding parameters of all the components in the units and adjusting the components according to the parameters; when the temperature in the area does not reach the preset standard, the central control unit calculates the difference between the preset temperature and the actual temperature, judges and adjusts the flow rate of liquid in the area according to the difference, and considers the temperature conditions of other user areas to make a judgment, if a certain number of areas are lower than the preset temperature, the central control unit controls the power generation and heat storage unit to increase the power so as to improve the temperature of the liquid in the system, and in addition, the central control module detects the difference between the temperatures at two ends of the plate heat exchanger to further judge and process the reasons that the temperature does not meet the requirements.
Further, the central control unit is provided with a first preset solar value A1, a second preset solar value A2, a first preset electric power W1, a second preset electric power W2 and a third preset electric power W3, wherein A1 is more than A2, W1 is more than W2 and is less than W3, the central control unit detects the heat energy A stored in the heat collecting unit and compares the heat energy A with the preset solar values A1 and A2, and the central control unit judges that the power generation and heat storage unit applies corresponding power to convert the electric energy into heat energy according to the interval where the heat energy A is located;
if A is less than or equal to A1, the central control unit judges that the power generation and heat storage unit adopts third preset electric power W3;
if A1 is more than A and less than or equal to A2, the central control unit judges that the power generation and heat storage unit adopts second preset electric power W2;
if A is more than A2, the central control unit judges that the power generation and heat storage unit adopts the first preset electric power W1.
Further, a preset temperature T0 is arranged in the central control unit, the central control unit detects the temperature T in the residence of the user and compares the temperature T with the preset temperature T0, and the central control unit preliminarily judges whether the heating of the heat storage and heating system is stable or not according to a comparison result;
if T is more than or equal to T0, the central control unit judges that the heating system is stable for heating the area;
if T is less than T0, the central control unit primarily determines that the heating system is unstable for the area, calculates a difference Δt between the preset temperature T0 and the area temperature T, and sets Δt=t0-T.
Further, the central control unit is further provided with a first preset temperature difference DeltaT 1 and a second preset temperature difference DeltaT 2, wherein DeltaT 1 < DeltaT2, and when the central control unit judges that the heating system of the heat storage heating system is unstable to the area, the central control unit compares the temperature difference DeltaT with the preset temperature differences DeltaT 1 and DeltaT 2 and correspondingly adjusts the heat storage heating system according to the interval where the temperature difference DeltaT is located;
if the delta T is less than or equal to delta T1, the central control unit judges that the heating system is stable for heating the area, and all parts in the system are not required to be regulated;
if DeltaT 1 < DeltaT2 is less than or equal to DeltaT 2, the central control module detects the temperature conditions in other user areas and further judges whether to adjust all components in the system according to the temperature conditions;
if DeltaT > DeltaT2, the central control unit controls the relevant valve in the heat storage and supply system to increase the flow velocity of the liquid in the heat storage and supply system to a corresponding value.
Further, the central control unit is also provided with a preset duty ratio alpha 0, when DeltaT 1 < DeltaTis less than or equal to DeltaT 2, the central control unit sequentially detects the temperature T ' in other user areas and compares the temperature T ' with the preset temperature T0, the central control unit counts the duty ratio alpha of the area with the temperature T ' < T0 and compares the duty ratio alpha with the preset duty ratio alpha 0, and the central control unit judges whether to correspondingly adjust each part in the heat storage and supply system according to the comparison result;
if alpha is less than or equal to alpha 0, the central control unit increases the liquid flow rate of the area with the area temperature lower than the preset temperature to a corresponding value;
if alpha is larger than alpha 0, the central control module judges that the reason that the temperature of the area is low is that the temperature of the liquid in the heat storage and supply system is low, and the central control system detects the temperature of the liquid in the system and further adjusts the heat supply condition of the system according to the temperature condition.
Further, the central control unit is provided with a first preset water temperature t1, a second preset water temperature t2, a first preset power adjustment coefficient beta 1 and a second preset power adjustment coefficient beta 2, wherein t1 is smaller than t2,1 is smaller than beta 1 and smaller than beta 2, when alpha is larger than alpha 0, the central control unit detects the liquid temperature t at the inlet of the heating unit and compares the liquid temperature t with the preset water temperatures t1 and t2, and the central control unit judges whether the power of the power generation and heat storage unit needs to be adjusted according to the interval where the liquid temperature t is located;
if t is less than or equal to t1, the central control unit judges that the power of the power generation and heat storage unit is increased by adopting a second preset power adjustment coefficient beta 2;
if t1 is more than t and less than or equal to t2, the central control unit judges that the power of the power generation and heat storage unit is increased by adopting a first preset power adjustment coefficient beta 1;
if t is more than t2, the central control unit judges that the power of the power generation and heat storage unit does not need to be regulated, the central control unit calculates the temperature difference delta t of the liquid at two ends of the plate heat exchanger, the delta t=the outlet liquid temperature-inlet liquid temperature of the plate heat exchanger is set, and the central control unit judges whether the plate heat exchanger is abnormal according to the size of the temperature difference delta t.
Further, the central control unit is provided with a preset heat exchanger temperature difference delta t0, and when t is more than t2, the central control unit judges the conditions of the plate heat exchanger according to the comparison result by comparing the temperature difference delta t with the preset heat exchanger temperature difference delta t 0;
if the delta t is not less than delta t0, the central control unit judges that the plate heat exchanger operates normally;
if Deltat < Deltat0, the central control unit judges that the plate heat exchanger is abnormal in operation, and the central control unit sends a notification to inform a worker to check and repair the plate heat exchanger.
Further, when Δt is not less than Δt0, the central control unit detects the temperature t″ of the user region after several times of adjustment and compares it with a preset temperature T0, and the central control unit determines whether the temperature in the region after adjustment meets the requirement according to the comparison result;
if T' is not less than T0, the central control unit judges that the temperature in the area after adjustment meets the requirement;
if T' < T0, the central control unit judges that the reason that the temperature in the user area does not accord with the standard is the own reason in the area.
Further, a plurality of circulating pumps, electric valves and flow valves are arranged in the heat accumulating and supplying system and are arranged in pipelines connected with all the components, wherein the circulating pumps are used for driving the flow of liquid in the system, the electric valves are used for opening and closing pipelines and controlling the flow direction of the liquid, and the flow valves are used for controlling the flow rate of the liquid and further controlling the flow speed of the liquid.
Further, the photovoltaic heat collection device comprises a solar photovoltaic panel, a condenser and a cooling heat storage device, wherein the condenser and the cooling heat storage device are respectively arranged on two sides and the back of the photovoltaic panel.
Compared with the prior art, the invention has the beneficial effects that the heat collection unit, the power generation and heat storage unit, the heating unit and the central control unit are arranged, so that the heating condition of each area is detected, when the heating of a certain area is insufficient, the central control unit adjusts each part in each unit to ensure that the heating of the area is sufficient, and the heating of the system can be reasonably allocated to save electric power while ensuring that the heating of all areas is sufficient.
Further, the multi-stage preset solar energy value and the multi-stage preset electric power are set, and the heat energy stored in the heat collecting unit is detected and compared with the preset solar energy value, and the power generation and heat storage unit is judged to apply corresponding power to convert electric energy into heat energy according to the section where the heat energy A is located, so that heating sufficiency of all areas is ensured, and meanwhile heating of a system can be reasonably allocated to save electric power.
Further, the invention is provided with the preset temperature, and by detecting the temperature in the residence of the user and comparing the temperature with the preset temperature, the invention preliminarily judges whether the heating of the heat storage and heating system is stable according to the comparison result, and can reasonably allocate the heating of the system to save electric power while ensuring that the heating of all areas is sufficient.
Further, the multi-stage preset temperature difference value is arranged, and the difference value between the preset temperature and the regional temperature is compared with the preset temperature difference value, and the heat storage and supply system is correspondingly regulated according to the interval where the temperature difference value is located, so that the heating of all the regions is ensured to be sufficient, and meanwhile, the heating of the system can be reasonably allocated to save electric power.
Furthermore, the invention is provided with the preset duty ratio, and the invention can reasonably allocate the heating of the system to save electric power while ensuring sufficient heating of all the areas by counting the duty ratio of the area with the area temperature T' < T0 and comparing the area with the preset duty ratio and judging whether to correspondingly adjust each part in the heat accumulating and supplying system according to the comparison result.
Further, the invention is provided with the multi-stage preset water temperature and the multi-stage preset power adjustment coefficient, and by detecting the liquid temperature at the inlet of the heating unit and comparing the liquid temperature with the preset water temperature, whether the power of the power generation and heat storage unit needs to be adjusted is judged according to the interval where the liquid temperature is located, and the heating of all areas is ensured to be sufficient, and meanwhile, the heating of the system can be reasonably allocated so as to save the electric power.
Furthermore, the invention is provided with the preset heat exchanger temperature difference, and the condition of the plate heat exchanger is judged according to the comparison result by comparing the temperature difference with the preset heat exchanger temperature difference, so that the heating of all areas is ensured to be sufficient, and meanwhile, the heating of the system can be reasonably allocated to save electric power.
Further, the temperature T' of the user area after adjustment for a plurality of times is detected and compared with the preset temperature T0, whether the temperature in the area after adjustment meets the requirement is judged according to the comparison result, and the heating of the system can be reasonably allocated to save the electric power while the sufficient heating of all the areas is ensured.
In the invention, a plurality of circulating pumps, electric valves and flow valves are arranged in the heat accumulating and supplying system and are arranged in pipelines connected with all the components, so that the heating of all the areas is ensured to be sufficient, and the heating of the system can be reasonably allocated to save electric power.
Further, in the invention, the photovoltaic heat collection device comprises a solar photovoltaic panel, a condenser and a cooling and heat storage device, so that the heating of all areas is ensured to be sufficient, and meanwhile, the heating of the system can be reasonably allocated to save electric power.
Drawings
Fig. 1 is a schematic structural diagram of a solar photo-thermal coupling flexible heat storage and supply system according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a schematic structural diagram of a solar photo-thermal coupling flexible heat storage and supply system according to the present invention, the system includes:
the heat collecting unit l comprises a solar heat collector and a heat storage water tank and is used for collecting and converting solar energy into heat energy to be stored;
the power generation and heat storage unit ll comprises a photovoltaic heat collection device, a direct-current variable-frequency heat pump and a flexible heat storage module and is used for converting electric energy into heat energy;
the heating unit lll is connected with the solar heat collection unit l and the photovoltaic direct-current power generation heat storage unit ll and is used for transferring heat energy to a user area, wherein the municipal heating unit lll comprises two plate heat exchangers which are respectively connected with a heating building and a municipal heat supply network;
a central control unit (not shown) connected to the units for detecting the corresponding parameters of the components in the units and adjusting the components according to the parameters; when the temperature in the area does not reach the preset standard, the central control unit calculates the difference between the preset temperature and the actual temperature, judges and adjusts the flow rate of liquid in the area according to the difference, and considers the temperature conditions of other user areas to make a judgment, if a certain number of areas are lower than the preset temperature, the central control unit controls the power generation and heat storage unit ll to increase the power so as to improve the temperature of the liquid in the system, and in addition, the central control module detects the difference between the temperatures at two ends of the plate heat exchanger to further judge and process the reasons that the temperature does not meet the requirements.
The invention is provided with the heat collection unit l, the power generation and heat accumulation unit, the heating unit lll and the central control unit, so that the heating condition of each area is detected, and when the heating of a certain area is insufficient, the central control unit adjusts each part in each unit to ensure that the heating of the area is sufficient, and the heating of all areas is ensured to be sufficient, and meanwhile, the heating of a system can be reasonably allocated to save electric power.
Specifically, the central control unit is provided with a first preset solar value A1, a second preset solar value A2, a first preset electric power W1, a second preset electric power W2 and a third preset electric power W3, wherein A1 is more than A2, W1 is more than W2 and is less than W3, the central control unit detects the heat energy A stored in the heat collection unit l and compares the heat energy A with the preset solar values A1 and A2, and the central control unit judges that the power generation and heat storage unit ll applies corresponding power to convert the electric energy into heat energy according to the interval where the heat energy A is located;
if A is less than or equal to A1, the central control unit judges that the power generation and heat storage unit ll adopts third preset electric power W3;
if A1 is more than A and less than or equal to A2, the central control unit judges that the power generation and heat storage unit ll adopts second preset electric power W2;
if A > A2, the central control unit judges that the power generation and heat storage unit ll adopts the first preset electric power W1.
The invention is provided with a multi-stage preset solar energy value and multi-stage preset electric power, and by detecting the heat energy stored in the heat collecting unit I and comparing the heat energy with the preset solar energy value, the invention judges that the power generation and heat storage unit ll applies corresponding power to convert electric energy into heat energy according to the interval where the heat energy A is positioned, and can reasonably allocate system heating to save electric power while ensuring sufficient heating in all areas.
Specifically, a preset temperature T0 is arranged in the central control unit, the central control unit detects the temperature T in the residence of the user and compares the temperature T with the preset temperature T0, and the central control unit preliminarily judges whether the heating of the heat storage and heating system is stable or not according to a comparison result;
if T is more than or equal to T0, the central control unit judges that the heating system is stable for heating the area;
if T is less than T0, the central control unit primarily determines that the heating system is unstable for the area, calculates a difference Δt between the preset temperature T0 and the area temperature T, and sets Δt=t0-T.
The invention is provided with the preset temperature, and by detecting the temperature in the residence of the user and comparing the temperature with the preset temperature and preliminarily judging whether the heating of the heat storage and heating system is stable or not according to the comparison result, the heating of all areas is ensured to be sufficient, and meanwhile, the heating of the system can be reasonably allocated so as to save electric power.
Specifically, the central control unit is further provided with a first preset temperature difference DeltaT 1 and a second preset temperature difference DeltaT 2, wherein DeltaT 1 < DeltaT2, and when the central control unit judges that the heating system of the heat storage heating system is unstable for the area, the central control unit compares the temperature difference DeltaT with the preset temperature differences DeltaT 1 and DeltaT 2 and correspondingly adjusts the heat storage heating system according to a section where the temperature difference DeltaT is located;
if the delta T is less than or equal to delta T1, the central control unit judges that the heating system is stable for heating the area, and all parts in the system are not required to be regulated;
if DeltaT 1 < DeltaT2 is less than or equal to DeltaT 2, the central control module detects the temperature conditions in other user areas and further judges whether to adjust all components in the system according to the temperature conditions;
if DeltaT > DeltaT2, the central control unit controls the relevant valve in the heat storage and supply system to increase the flow velocity of the liquid in the heat storage and supply system to a corresponding value.
The multi-stage preset temperature difference value is arranged, and the difference value between the preset temperature and the regional temperature is compared with the preset temperature difference value, so that the heat storage and supply system is correspondingly regulated according to the interval where the temperature difference value is located, and the heating of the system can be reasonably allocated to save electric power while the sufficient heating of all the regions is ensured.
Specifically, the central control unit is further provided with a preset duty ratio alpha 0, when DeltaT 1 < DeltaTis less than or equal to DeltaT 2, the central control unit sequentially detects the temperature T ' in other user areas and compares the temperature T ' with the preset temperature T0, the central control unit counts the duty ratio alpha of the area with the temperature T ' < T0 and compares the duty ratio alpha with the preset duty ratio alpha 0, and the central control unit judges whether to correspondingly adjust each part in the heat storage and supply system according to the comparison result;
if alpha is less than or equal to alpha 0, the central control unit increases the liquid flow rate of the area with the area temperature lower than the preset temperature to a corresponding value;
if alpha is larger than alpha 0, the central control module judges that the reason that the temperature of the area is low is that the temperature of the liquid in the heat storage and supply system is low, and the central control system detects the temperature of the liquid in the system and further adjusts the heat supply condition of the system according to the temperature condition.
The invention is provided with the preset duty ratio, and by counting the duty ratio of the area with the area temperature T' < T0 and comparing the duty ratio with the preset duty ratio, the invention judges whether to correspondingly adjust each part in the heat storage and supply system according to the comparison result, and can reasonably allocate the system heating to save electric power while ensuring that the heating of all the areas is sufficient.
Specifically, the central control unit is provided with a first preset water temperature t1, a second preset water temperature t2, a first preset power adjustment coefficient beta 1 and a second preset power adjustment coefficient beta 2, wherein t1 is smaller than t2,1 is smaller than beta 1 and smaller than beta 2, when alpha is larger than alpha 0, the central control unit detects the liquid temperature t at the inlet of the heating unit lll and compares the liquid temperature t with preset water temperatures t1 and t2, and the central control unit judges whether the power of the power generation and heat storage unit ll needs to be adjusted according to the interval where the liquid temperature t is located;
if t is less than or equal to t1, the central control unit judges that the power of the power generation and heat storage unit ll is increased by adopting a second preset power adjustment coefficient beta 2;
if t1 is more than t and less than or equal to t2, the central control unit judges that the power generation and heat storage unit ll adopts a first preset power adjustment coefficient beta 1 to improve the power of the power generation and heat storage unit ll;
if t is more than t2, the central control unit judges that the power of the power generation and heat storage unit ll does not need to be regulated, the central control unit calculates the temperature difference delta t of the liquid at two ends of the plate heat exchanger, the delta t=the outlet liquid temperature-inlet liquid temperature of the plate heat exchanger is set, and the central control unit judges whether the plate heat exchanger is abnormal according to the size of the temperature difference delta t.
The invention is provided with a multi-stage preset water temperature and a multi-stage preset power adjustment coefficient, and by detecting the liquid temperature at the inlet of the heating unit lll and comparing the liquid temperature with the preset water temperature, whether the power of the power generation and heat storage unit ll needs to be adjusted is judged according to the interval where the liquid temperature is located, and the heating of all areas is ensured to be sufficient, and meanwhile, the heating of a system can be reasonably allocated to save electric power.
Specifically, the central control unit is provided with a preset heat exchanger temperature difference value delta t0, and when t is more than t2, the central control unit judges the conditions of the plate heat exchanger according to the comparison result by comparing the temperature difference value delta t with the preset heat exchanger temperature difference value delta t 0;
if the delta t is not less than delta t0, the central control unit judges that the plate heat exchanger operates normally;
if Deltat < Deltat0, the central control unit judges that the plate heat exchanger is abnormal in operation, and the central control unit sends a notification to inform a worker to check and repair the plate heat exchanger.
The invention is provided with the preset heat exchanger temperature difference, and by judging the conditions of the plate heat exchanger according to the comparison result by comparing the temperature difference with the preset heat exchanger temperature difference, the invention can reasonably allocate the system heating to save electric power while ensuring that the heating of all areas is sufficient.
Specifically, when Δt is not less than Δt0, the central control unit detects the temperature t″ of the user region after several times of adjustment and compares it with a preset temperature T0, and the central control unit determines whether the temperature in the region after adjustment meets the requirement according to the comparison result;
if T' is not less than T0, the central control unit judges that the temperature in the area after adjustment meets the requirement;
if T' < T0, the central control unit judges that the reason that the temperature in the user area does not accord with the standard is the own reason in the area.
According to the invention, the temperature T' of the user area after adjustment for a plurality of times is detected and compared with the preset temperature T0, and whether the temperature in the area after adjustment meets the requirement is judged according to the comparison result, so that the heating sufficiency of all the areas is ensured, and meanwhile, the heating of the system can be reasonably allocated to save the electric power.
Specifically, a plurality of circulating pumps, electric valves and flow valves are arranged in the heat accumulating and supplying system and are arranged in pipelines connected with all the components, wherein the circulating pumps are used for driving the flow of liquid in the system, the electric valves are used for opening and closing pipelines and controlling the flow direction of the liquid, and the flow valves are used for controlling the flow rate of the liquid and further controlling the flow speed of the liquid.
In the invention, a plurality of circulating pumps, electric valves and flow valves are arranged in the heat accumulating and supplying system and are arranged in pipelines connected with all the components, so that the heating of all the areas is ensured to be sufficient, and the heating of the system can be reasonably allocated to save electric power.
Specifically, the photovoltaic heat collection device comprises a solar photovoltaic panel, a condenser and a cooling heat storage device, wherein the condenser and the cooling heat storage device are respectively arranged on two sides and the back of the photovoltaic panel.
In the invention, the photovoltaic heat collection device comprises a solar photovoltaic panel, a condenser and a cooling and heat storage device, so that the heating of all areas is ensured to be sufficient, and meanwhile, the heating of a system can be reasonably allocated to save electric power.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A solar photo-thermal coupling flexible heat storage and supply system, comprising:
the heat collection unit comprises a solar heat collector and a heat storage water tank and is used for collecting and converting solar energy into heat energy to be stored;
the power generation and heat storage unit comprises a photovoltaic heat collection device, a direct-current variable-frequency heat pump and a flexible heat storage module, and is used for converting electric energy into heat energy;
the heating unit is connected with the heat collecting unit and the power generation and heat storage unit and is used for transferring heat energy to a user area, wherein the heating unit comprises two plate heat exchangers which are respectively connected with a heating building and a municipal heat supply network;
the central control unit is connected with the units and is used for detecting corresponding parameters of all the components in the units and adjusting the components according to the parameters; the central control unit detects that a user area exists, when the temperature in the area does not reach a preset standard, the central control unit calculates the difference between the preset temperature and the actual temperature, judges and adjusts the flow rate of liquid in the area according to the difference, considers the temperature conditions of other user areas and makes judgment, if a certain number of areas are lower than the preset temperature, the central control unit controls the power generation and heat storage unit to increase the power so as to improve the temperature of the liquid in the system, and in addition, the central control module detects the difference between the temperatures at two ends of the plate heat exchanger to further judge and process the reasons that the temperature does not meet the requirements;
the central control unit is provided with a first preset solar value A1, a second preset solar value A2, a first preset electric power W1, a second preset electric power W2 and a third preset electric power W3, wherein A1 is smaller than A2, W1 is smaller than W2 and smaller than W3, the central control unit detects heat energy A stored in the heat collecting unit and compares the heat energy A with the preset solar values A1 and A2, and the central control unit judges that the power generation and heat storage unit applies corresponding power to convert the electric energy into heat energy according to the interval where the heat energy A is located;
if A is less than or equal to A1, the central control unit judges that the power generation and heat storage unit adopts third preset electric power W3;
if A1 is more than A and less than or equal to A2, the central control unit judges that the power generation and heat storage unit adopts second preset electric power W2;
if A is more than A2, the central control unit judges that the power generation and heat storage unit adopts a first preset electric power W1;
the central control unit is internally provided with a preset temperature T0, detects the temperature T in the residence of the user and compares the temperature T with the preset temperature T0, and preliminarily judges whether the heating of the heat storage and heating system is stable or not according to a comparison result;
if T is more than or equal to T0, the central control unit judges that the heating system is stable for heating the area;
if T is less than T0, the central control unit primarily determines that the heating system is unstable for the area, calculates a difference Δt between the preset temperature T0 and the area temperature T, and sets Δt=t0-T.
2. The solar photo-thermal coupling flexible heat storage system according to claim 1, wherein the central control unit is further provided with a first preset temperature difference value delta T1 and a second preset temperature difference value delta T2, wherein when the central control unit judges that the heat storage system is unstable in heating the area, the central control unit compares the temperature difference value delta T with the preset temperature difference values delta T1 and delta T2 and correspondingly adjusts the heat storage system according to a section where the temperature difference value delta T is located;
if the delta T is less than or equal to delta T1, the central control unit judges that the heating system is stable for heating the area, and all parts in the system are not required to be regulated;
if DeltaT 1 < DeltaT2 is less than or equal to DeltaT 2, the central control module detects the temperature conditions in other user areas and further judges whether to adjust all components in the system according to the temperature conditions;
if DeltaT > DeltaT2, the central control unit controls the relevant valve in the heat storage and supply system to increase the flow velocity of the liquid in the heat storage and supply system to a corresponding value.
3. The solar photo-thermal coupling flexible heat storage system according to claim 2, wherein the central control unit is further provided with a preset duty ratio alpha 0, when DeltaT 1 < DeltaTis less than or equal to DeltaT 2, the central control unit sequentially detects the temperature T ' in other user areas and compares the temperature T ' with the preset temperature T0, the central control unit counts the duty ratio alpha of the area with the temperature T ' < T0 and compares the duty ratio alpha with the preset duty ratio alpha 0, and the central control unit judges whether corresponding adjustment of all components in the heat storage system is needed according to the comparison result;
if alpha is less than or equal to alpha 0, the central control unit increases the liquid flow rate of the area with the area temperature lower than the preset temperature to a corresponding value;
if alpha is larger than alpha 0, the central control module judges that the reason that the temperature of the area is low is that the temperature of the liquid in the heat storage and supply system is low, and the central control system detects the temperature of the liquid in the system and further adjusts the heat supply condition of the system according to the temperature condition.
4. The solar photo-thermal coupling flexible heat storage system according to claim 3, wherein the central control unit is provided with a first preset water temperature t1, a second preset water temperature t2, a first preset power adjustment coefficient beta 1 and a second preset power adjustment coefficient beta 2, wherein t1 is less than t2,1 is less than beta 1 and less than beta 2, when alpha is more than alpha 0, the central control unit detects the liquid temperature t at the inlet of the heating unit and compares the liquid temperature t with preset water temperatures t1 and t2, and the central control unit judges whether the power of the power generation heat storage unit needs to be adjusted according to the interval where the liquid temperature t is located;
if t is less than or equal to t1, the central control unit judges that the power of the power generation and heat storage unit is increased by adopting a second preset power adjustment coefficient beta 2;
if t1 is more than t and less than or equal to t2, the central control unit judges that the power of the power generation and heat storage unit is increased by adopting a first preset power adjustment coefficient beta 1;
if t is more than t2, the central control unit judges that the power of the power generation and heat storage unit does not need to be regulated, the central control unit calculates the temperature difference delta t of the liquid at two ends of the plate heat exchanger, the delta t=the outlet liquid temperature-inlet liquid temperature of the plate heat exchanger is set, and the central control unit judges whether the plate heat exchanger is abnormal according to the size of the temperature difference delta t.
5. The solar photo-thermal coupling flexible heat storage and supply system according to claim 4, wherein the central control unit is provided with a preset heat exchanger temperature difference value delta t0, when t is more than t2, the central control unit judges the condition of the plate heat exchanger according to the comparison result by comparing the temperature difference value delta t with the preset heat exchanger temperature difference value delta t 0;
if the delta t is not less than delta t0, the central control unit judges that the plate heat exchanger operates normally;
if Deltat < Deltat0, the central control unit judges that the plate heat exchanger is abnormal in operation, and the central control unit sends a notification to inform a worker to check and repair the plate heat exchanger.
6. The solar photo-thermal coupling flexible heat storage system according to claim 5, wherein when Δt is not less than Δt0, the central control unit detects the temperature t″ of the user area adjusted several times and compares it with a preset temperature T0, and the central control unit determines whether the temperature in the adjusted area meets the requirement according to the comparison result;
if T' is not less than T0, the central control unit judges that the temperature in the area after adjustment meets the requirement;
if T' < T0, the central control unit judges that the reason that the temperature in the user area does not accord with the standard is the own reason in the area.
7. The solar photo-thermal coupling flexible heat storage system according to claim 1, wherein a plurality of circulating pumps, electric valves and flow valves are arranged in the heat storage system and are arranged in pipelines connected with each other, wherein the circulating pumps are used for driving the flow of liquid in the system, the electric valves are used for opening and closing pipelines and controlling the flow direction of the liquid, and the flow valves are used for controlling the flow rate of the liquid and further controlling the flow speed of the liquid.
8. The solar photo-thermal coupling flexible heat storage and supply system according to claim 1, wherein the photovoltaic heat collection device comprises a solar photovoltaic panel, a condenser and a cooling heat storage device, wherein the condenser and the cooling heat storage device are respectively arranged on two sides and the back of the photovoltaic panel.
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