CN212511863U - Novel photo-thermal-thermoelectric coupling system - Google Patents
Novel photo-thermal-thermoelectric coupling system Download PDFInfo
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- CN212511863U CN212511863U CN202021091591.5U CN202021091591U CN212511863U CN 212511863 U CN212511863 U CN 212511863U CN 202021091591 U CN202021091591 U CN 202021091591U CN 212511863 U CN212511863 U CN 212511863U
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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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- 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
- Y02E10/50—Photovoltaic [PV] energy
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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
- Y02E10/60—Thermal-PV hybrids
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Abstract
The utility model provides a novel light and heat-thermal electric coupling system, belongs to the light and heat power generation field, the utility model discloses a solve among the prior art and can appear the problem of peak regulation difficulty with traditional heating system, the coupling system includes current heater system, solar mirror field, main oil pump, expansion tank, heat supply network user, water heat exchanger, water storage tank and oil water heat exchanger, the utility model discloses mainly utilize non-heating phase to collect sunshine to heat accumulation to the water storage tank in, the heat of storage both can be used for generating electricity to the steam turbine, can also heat the heat supply network user in heating phase simultaneously.
Description
Technical Field
The utility model relates to a light and heat electricity generation field, concretely relates to novel light and heat-thermoelectric coupling system.
Background
With the rapid development of economy and the continuing increase in energy demand, the emission of greenhouse gases from the combustion of fossil fuels places increasingly heavy pressure on the environment. In the face of the serious environmental crisis brought by the current fossil energy consumption, the adjustment of the energy structure is urgent, and the country more and more pays more attention to the development of new energy, especially the utilization of solar energy; solar energy is taken as renewable clean energy, the development and the utilization of the solar energy are hot spots of world attention and discussion, the trend of replacing fossil fuel heating by solar energy heating is greatly facilitated, particularly, the peak regulation problem only occurs in a traditional heating system during heating in winter in the north of China, and the heating effect is greatly influenced, so that the development of a system for carrying out photo-thermal conversion by using solar energy and the existing heating system are matched to supply heat to residents in winter, and the solar energy-based solar energy heat supply system has practical significance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel photo-thermal-thermoelectric coupling system for solving the problem of difficult peak regulation of the traditional heating system in the prior art;
a novel photo-thermal-thermoelectric coupling system comprises an existing heater system, a solar mirror field, a main oil pump, an expansion tank, a heat supply network user, a water supply heat exchanger, a water storage tank and an oil-water heat exchanger;
the existing heater system is provided with a steam turbine interface, a deaerator interface, a heater system heat supply hot water output end, a heater system heat supply cold water input end, a heater system first cold water input end, a heater system second cold water input end and a heater system hot water output end;
a steam turbine interface of the existing heater system is connected with a steam turbine through a pipeline, and a deaerator interface of the existing heater system is connected with a deaerator through a pipeline;
the hot water supply output end of a heater system of the existing heater system is connected with the hot water input end of a heat supply network user through a hot water supply output pipeline of the heater system, and the hot water supply input end of the heater system of the existing heater system is connected with the cold water output end of the heat supply network user through a hot water supply input pipeline of the heater system;
a heater system I cold water input end of the existing heater system is connected with a heat storage tank working pipeline through a heater system I cold water input pipeline, a heater system II cold water input end of the existing heater system is connected with the heat storage tank working pipeline through a heater system II cold water input pipeline, and a heater system hot water output end of the existing heater system is connected with the heat storage tank working pipeline through a heater system hot water output pipeline;
the water supply heat exchanger comprises a first hot side hot water input end, a first hot side cold water output end, a first cold side hot water output end and a first cold side cold water input end;
the first cold side hot water output end of the water supply heat exchanger is connected with the hot water input end of the steam turbine backwater system through a pipeline, and the first cold side cold water input end of the water supply heat exchanger is connected with the cold water output end of the steam turbine backwater system through a pipeline;
a first hot side hot water input end of the water supply heat exchanger is connected with a heat storage tank working pipeline through a hot water input pipeline of the water supply heat exchanger, and a first hot side cold water output end of the water supply heat exchanger is connected with a heat storage tank working pipeline through a cold water output pipeline of the water supply heat exchanger;
the oil-water heat exchanger comprises a hot side hot oil input end, a hot side cold oil output end, a second cold side hot water output end and a second cold side cold water input end;
a second cold side hot water output end of the oil-water heat exchanger is connected with a working pipeline of the heat storage tank through a hot water output pipeline of the oil-water heat exchanger, and a second cold side cold water input end of the oil-water heat exchanger is connected with the working pipeline of the heat storage tank through a cold water input pipeline of the oil-water heat exchanger;
the working pipeline of the heat storage tank is communicated with the water storage tank;
the hot oil output end of the solar mirror field is connected with the hot side oil input end of the oil-water heat exchanger through a mirror field hot oil output pipeline, the cold oil input end of the solar mirror field is connected with the hot side cold oil output end of the oil-water heat exchanger through a mirror field cold oil input pipeline, the expansion tank is connected in parallel to the mirror field cold oil input pipeline, the main oil pump is connected in series to the mirror field cold oil input pipeline, and the main oil pump is arranged close to the cold oil input end of the solar mirror field;
further, the heat storage tank working pipeline comprises a heat storage tank working main road, a heat storage and discharge heat pump group is connected in series on the heat storage tank working main road, a heat storage tank high-temperature water branch road and a heat storage tank low-temperature water branch road are arranged at one end of the heat storage tank working main road, a heat storage tank high-temperature water branch road is arranged on the heat storage tank high-temperature water branch road, one end of the heat storage tank high-temperature water branch road is communicated with the heat storage tank high-temperature water branch road, a heat storage tank low-temperature water branch road is arranged on the heat storage tank low-temperature water branch road, one end of the heat storage tank low-temperature water branch road is communicated with the heat storage tank low-temperature water branch road, one end of the heat storage tank high-temperature water branch road is connected with;
a second cold water input pipeline of the heater system and a hot water input pipeline of the water supply heat exchanger are connected with a working trunk line of the heat storage tank;
the hot water output pipeline of the heater system and the hot water output pipeline of the oil-water heat exchanger are both connected with the high-temperature water branch of the heat storage tank;
a second cold water input pipeline of the heater system and a cold water output pipeline of the water supply heat exchanger are connected with a high-temperature water branch of the heat storage tank;
further, the heat accumulation and release heat pump set comprises two heat accumulation and release heat pumps which are arranged in parallel;
furthermore, a communicating branch is also arranged between the hot oil output pipeline of the mirror field and the cold oil input pipeline of the mirror field;
furthermore, a heat storage tank heat supply hot water output pipeline is arranged between the heater system heat supply hot water output pipeline and the heat storage tank working main road, one end of the heat storage tank heat supply hot water output pipeline is communicated with the heat storage tank working main road, the other end of the heat storage tank heat supply hot water output pipeline is communicated with the heater system heat supply hot water output pipeline, and a mixed flow device (2) is arranged at the joint of the heat storage tank heat supply hot water output pipeline and the heater system heat supply hot water output pipeline;
compared with the prior art, the utility model following beneficial effect has:
the utility model provides a novel light and heat-thermoelectric coupling system can effectively collect solar energy to photoelectric conversion can collect solar energy and carry out the energy storage to heat storage tank when non-heating period, remains the heat of collection, cooperates traditional heating system for the resident heating together in heating period, solves the difficult problem of peak regulation with heat fixed electricity operational mode, simultaneously the utility model provides a system can the idle place of effectual utilization, has also further realized energy saving and emission reduction's purpose.
Drawings
FIG. 1 is a schematic diagram of the connection of the photothermal-thermoelectric coupling system of the present invention;
fig. 2 is a schematic diagram of the operation of the solar mirror field in the process of storing heat in the heat storage tank;
fig. 3 is a schematic operation diagram of the heat collected by the solar mirror field and the heat storage tank in the present invention;
FIG. 4 is a schematic view of the circulation operation of heat transfer oil in the solar mirror field of the present invention;
FIG. 5 is a schematic view showing the operation of the photo-thermal system and the heat supply steam simultaneously storing heat in the water storage tank;
FIG. 6 is a schematic view of the operation of the heat storage of the water storage tank by the medium heat supply steam of the present invention;
FIG. 7 is a schematic view of the operation of the present invention in which steam and water storage tanks simultaneously supply heat to users of the heat network;
in the figure, 1, an existing heater system, 2 flow mixers, 3 solar mirror fields, 4 main oil pumps, 5 expansion tanks, 6 heat supply network users, 7 water supply heat exchangers, 8 heat storage pump sets, 9 water storage tanks and 10 oil-water heat exchangers are arranged, wherein I air is extracted from a steam turbine, II air is extracted to an oxygen removal machine, III air is extracted from a steam turbine water return system, and IV air is extracted to a steam turbine water return system.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 7, and provides a novel photothermal-thermoelectric coupling system, which includes a conventional heater system 1, a solar mirror field 3, a main oil pump 4, an expansion tank 5, a heat supply network user 6, a feed water heat exchanger 7, a water storage tank 9, and an oil-water heat exchanger 10;
the existing heater system 1 is provided with a steam turbine interface, a deaerator interface, a heater system heat supply hot water output end, a heater system heat supply cold water input end, a heater system first cold water input end, a heater system second cold water input end and a heater system hot water output end;
a turbine interface of the existing heater system 1 is connected with a turbine through a pipeline, and a deaerator interface of the existing heater system 1 is connected with a deaerator through a pipeline;
a heater system heat supply hot water output end of the existing heater system 1 is connected with a hot water input end of a heat supply network user 6 through a heater system heat supply hot water output pipeline, and a heater system heat supply cold water input end of the existing heater system 1 is connected with a cold water output end of the heat supply network user 6 through a heater system heat supply cold water input pipeline;
a heater system I cold water input end of the existing heater system 1 is connected with a heat storage tank working pipeline through a heater system I cold water input pipeline, a heater system II cold water input end of the existing heater system 1 is connected with a heat storage tank working pipeline through a heater system II cold water input pipeline, and a heater system hot water output end of the existing heater system 1 is connected with a heat storage tank working pipeline through a heater system hot water output pipeline;
the water supply heat exchanger 7 comprises a first hot side hot water input end, a first hot side cold water output end, a first cold side hot water output end and a first cold side cold water input end;
the first cold side hot water output end of the water supply heat exchanger 7 is connected with the hot water input end of the steam turbine backwater system through a pipeline, and the first cold side cold water input end of the water supply heat exchanger 7 is connected with the cold water output end of the steam turbine backwater system through a pipeline;
a first hot side hot water input end of the water supply heat exchanger 7 is connected with a heat storage tank working pipeline through a hot water input pipeline of the water supply heat exchanger, and a first hot side cold water output end of the water supply heat exchanger is connected with a heat storage tank working pipeline through a cold water output pipeline of the water supply heat exchanger;
the oil-water heat exchanger 10 comprises a hot side hot oil input end, a hot side cold oil output end, a second cold side hot water output end and a second cold side cold water input end;
a second cold side hot water output end of the oil-water heat exchanger 10 is connected with a heat storage tank working pipeline through an oil-water heat exchanger hot water output pipeline, and a second cold side cold water input end of the oil-water heat exchanger 10 is connected with the heat storage tank working pipeline through an oil-water heat exchanger cold water input pipeline;
the working pipeline of the heat storage tank is communicated with the water storage tank 9;
a hot oil output end of the solar mirror field 3 is connected with a hot side oil input end of the oil-water heat exchanger 10 through a mirror field hot oil output pipeline, a cold oil input end of the solar mirror field 3 is connected with a hot side cold oil output end of the oil-water heat exchanger 10 through a mirror field cold oil input pipeline, an expansion tank 5 is connected to the mirror field cold oil input pipeline in parallel, a main oil pump 4 is connected to the mirror field cold oil input pipeline in series, and the main oil pump 4 is arranged close to the cold oil input end of the solar mirror field 3;
the heat storage tank working pipeline comprises a heat storage tank working trunk road, a storage and discharge heat pump group 8 is connected in series on the heat storage tank working trunk road, one end of the heat storage tank working trunk road is provided with a heat storage tank high-temperature water branch road and a heat storage tank low-temperature water branch road, a heat storage tank high-temperature water branch road is arranged on the heat storage tank high-temperature water branch road, one end of the heat storage tank high-temperature water branch road is communicated with the heat storage tank high-temperature water branch road, a heat storage tank low-temperature water branch road is arranged on the heat storage tank low-temperature water branch road, one end of the heat storage tank low-temperature water branch road is communicated with the heat storage tank low-temperature water branch road, one end of the heat storage tank high-temperature water branch road is connected with a;
a second cold water input pipeline of the heater system and a hot water input pipeline of the water supply heat exchanger are connected with a working trunk line of the heat storage tank;
the hot water output pipeline of the heater system and the hot water output pipeline of the oil-water heat exchanger are both connected with the high-temperature water branch of the heat storage tank;
a second cold water input pipeline of the heater system and a cold water output pipeline of the water supply heat exchanger are connected with a high-temperature water branch of the heat storage tank;
the heat accumulation and release heat pump group 8 comprises two heat accumulation and release heat pumps which are arranged in parallel;
a communicating branch is also arranged between the mirror field hot oil output pipeline and the mirror field cold oil input pipeline;
the utility model discloses a heater system heat supply hot water output pipeline, including heater system heat supply hot water output pipeline, heat storage tank heat supply hot water output pipeline, heater system heat supply hot water output pipeline, be equipped with heat storage tank heat supply hot water output pipeline between heater system heat supply hot water output pipeline and the heat storage tank work trunk road, heat storage tank heat supply hot water output pipeline's one end and heat storage tank work trunk road intercommunication setting, heat storage tank heat supply hot water output pipeline's the other end and heater system heat supply hot water output pipeline intercommunication setting.
In the embodiment, a solar mirror field 3, a main oil pump 4 and an expansion tank 5 form a solar heat collecting unit, the solar heat collecting unit is arranged on the hot side of an oil-water heat exchanger 10 and used for transferring the collected heat to a water storage tank for heat storage through the oil-water heat exchanger 10, in order to ensure that the solar heat collecting unit can realize the self-circulation function of heat conduction oil and the heat transfer is smooth on the hot side of the oil-water heat exchanger 10, a valve a1 is connected in series on a mirror field hot oil output pipeline, a mirror field cold oil input pipeline is sequentially connected in series with a valve a3 and a valve a2 from input to output ends, the expansion tank 5 is connected in parallel on a valve a2, a valve a4 is connected in series on an input pipeline of the expansion tank 5, a valve a5 is connected in series on an output pipeline of the expansion tank 5, a communicating branch is arranged between the mirror field cold oil;
when the heat accumulation and release heat pump group 8 works normally, only one heat accumulation and release heat pump works, and the other heat accumulation and release heat pump is used as a substitute, so that the first heat accumulation and release heat pump is convenient to replace in time when a fault occurs;
the cold side of the oil-water heat exchanger 10 is a heat storage unit of a water storage tank 9, the heat storage of the water storage tank 9 is divided into two parts, one part is photo-thermal conversion carried out by a solar heat collecting unit consisting of a solar mirror field 3, a main oil pump 4 and an expansion tank 5, the other part is heat storage carried out on the water storage tank 9 by the existing heating system, in order to ensure smooth application and conversion of the two heat storage modes in actual work, a valve a7 is connected in series on a cold water input pipeline of the oil-water heat exchanger, a valve a8 is connected in series on a hot water output pipeline of the oil-water heat exchanger, a valve a18 is connected in series on a cold water input pipeline of the heater system, a valve a15 is connected in series on a working main pipeline of the heat storage tank, a valve a10 is connected in series on a high-temperature water pipeline of the heat storage tank, a valve a11 is connected in series on a high temperature water branch pipeline of, two ends of the heat accumulation and release pump group 8 are connected with a valve a13 in parallel, and the valve a13 is used for performing flow-dividing and pressure-maintaining functions when the two heat accumulation and release pumps are replaced;
meanwhile, in order to ensure that the water storage tank 9 can perform good heat conversion on the steam turbine and provide heat for the steam turbine in a non-heating period, a water supply heat exchanger 8 is arranged in the system, and in order to ensure that the heat can be smoothly provided for the steam turbine, a valve a16 is connected in series on a cold water output pipeline of the water supply heat exchanger, and a valve a17 is connected in series on a hot water input pipeline of the water supply heat exchanger;
in the winter heating period, the water storage tank 9 can also be matched with the existing heating system 1 to heat a heat supply network user 6, and a valve 14 is connected in series on a heat supply hot water output pipeline of the heat storage tank;
in practical application, in order to improve the heat collection efficiency of solar heat, a heat collection system can be formed by a plurality of solar heat collection units, the heat collection system is connected with the hot side of an oil-water heat exchanger 10 to exchange heat for a water storage tank 9, and an expansion tank 5 is used for primarily filling heat conduction oil, absorbing and supplementing volume change of the heat conduction oil caused by temperature change and is used as a place for storing and supplementing the heat conduction oil; the main oil pump 4 is used for re-conveying heat conduction oil subjected to heat exchange by the oil-water heat exchanger to the solar mirror field 3 to collect heat and conveying the heat conduction oil subjected to heat collection to the oil-water heat exchanger to perform circulating heat exchange;
the water storage tank 9 operates according to the principle that cold water and hot water are layered due to density difference of water with different temperatures, the water supply with high temperature is positioned in the upper area of the water storage tank, the return water with low temperature is positioned in the lower area of the water storage tank, and a transition layer exists between the hot water and the cold water. During heat storage, hot water enters the water storage tank from the upper area of the water storage tank, and cold water with the same quality is discharged from the bottom of the water storage tank; the exothermic process, then, flows water in the opposite direction. The stable control of the inlet and the outlet is an important factor for ensuring the reliable operation of the heat storage device, preventing the mixing of cold and hot water layers in the water storage tank and maintaining the stability of a transition layer;
the water storage tank 9 is composed of a tank body (steel tank or reinforced concrete), a water distribution disc, a water level controller, a drainage system, a safety device, a water seal, a temperature and pressure measuring device and the like. The water distribution disc is the most important part of the heat accumulator and can be used for controlling the speed of water flow flowing into and out of the heat accumulator and preventing the hot water layer and the cold water layer in the heat accumulator from being mixed;
if the user side heat load fluctuates greatly and frequently, the water storage tank 9 can store the redundant heat when the heat load is low and release the redundant heat to the outside when the heat load is high. In the heat storage process, the water storage tank 9 is equivalent to a heat user, so that the heat load demand curve of the user becomes smoother, the unit can be kept to operate at higher efficiency, and the economy is improved. After the heat storage process of the water storage tank 9 is finished, the unit can reduce the load at night or within a certain period of time and even stop without influencing the external heat supply. The function of the water storage tank 9 is summarized as follows: 1. the method has the advantages that thermoelectric decoupling is realized, a combined heat and power generation unit has the capacity of deep peak regulation flexible operation, 2, optimization and economic operation of a heat source and a heat supply system are realized, 3, a buffer between the heat source and a user in a heat network system, 4, a peak heat source, 5, a standby heat source, 6, emergency water supplement and 7, system constant pressure are realized.
Principle of operation
The utility model is implemented by firstly establishing a groove type solar mirror field in an unoccupied area, adding at least two main oil pumps 4 (adopting electric drive and frequency conversion adjustment) which are used for heat collection side by side, an expansion tank 5 which is used for storing heat conducting oil and supplementing and recovering the heat conducting oil and a water supply heat exchanger 7 which is used for heating cold water, and arranging a mirror field heat conducting oil inlet and outlet pipeline and a corresponding pipeline valve; a hot water storage tank 9 is built beside a heat exchange initial station, a heat storage and release heat pump group 8 (formed by connecting two heat storage and release heat pumps in parallel, and adopting electric drive and variable frequency regulation) is added, and a hot water inlet and outlet pipeline, a cold water inlet and outlet pipeline and corresponding pipeline valves of the water storage tank 9 are arranged;
when heat is stored by the solar mirror field 3, the main oil pump 4 conveys heat conduction oil into the solar mirror field 3 to heat the heat conduction oil, the heated heat conduction oil enters the oil-water heat exchanger 10 to exchange heat with water, meanwhile, the storage heat pump group 8 pumps cold water at the bottom of the water storage tank 9 out to be sent to the oil-water heat exchanger 10 for heating, and heated hot water flows back to the upper part of the water storage tank 9 and is stored in the water storage tank 9;
when the steam turbine is used for extracting steam and storing heat, the heat storage and release heat pump group 8 is used for extracting cold water at the bottom of the water storage tank to be sent to the newly-added existing heating system 1 to exchange heat with hot steam extracted from the steam turbine, and hot water after heat exchange flows back to the upper part of the water storage tank 9 and is stored in the water storage tank 9;
when the solar mirror field 3 and the steam turbine are used for extracting steam and storing heat simultaneously, the respective pipeline valves are opened, cold water flows through the oil-water heat exchanger 10 and the existing heating system 1 through the water storage tank 9 respectively, and heated hot water flows back to the upper part of the water storage tank 9 and is stored in the water storage tank 9;
in the heating season, when the water storage tank 9 releases heat and heats to the heat supply network users 6, the heat storage and release pump group 8 pumps hot water at the top of the water storage tank 9 out to send the hot water to the heat supply network users 6 for heating;
in a non-heating season, when the water storage tank 9 supplies heat to the turbine water return system, the heat storage and release heat pump group 8 pumps hot water at the top of the water storage tank 9 out to the turbine water return system, exchanges heat with the turbine water return system, and conveys the heat to the turbine.
A row of temperature sensors are uniformly arranged in the water storage tank 9, the control system can record the water temperatures of all layers of the water storage tank at different heights at any time, the current heat storage quantity condition of the water storage tank is calculated according to the water temperatures, and the decision and operation of operators are facilitated.
In the design of this 9 schemes of water storage tank, water storage tank 9 can carry out the heat accumulation according to the illumination condition, and the condition according to steam turbine or heat supply network is exothermic, as long as water storage tank 9 has not been stored up, and solar radiation is sufficient, just can carry out the heat accumulation, as long as water storage tank 9 has stored some heats, just can release heat according to steam turbine and heat supply network user 6 demand.
To above-mentioned theory of operation the utility model discloses there are following several kinds of operational modes:
the first operation mode is as follows: heat is stored to the water storage tank 9 through the solar mirror field 3.
When the solar radiation is sufficient, the valve a4, the valves a5 and a6 are opened, the inlet and outlet valves a1 and a3 of the oil-water heat exchanger 10 are closed, the main oil pump is started to circulate the heat conduction oil, the solar mirror field 3 collects the heat (the operation route is shown in figure 4), the temperature of the heat conduction oil at the outlet of the solar mirror field 3 is monitored, when the temperature reaches the heat exchange temperature, the inlet and outlet valves a1 and a3 of the oil-water heat exchanger 10 are opened, the bypass valves a2 and a6 are closed, and the heat storage water pump unit 8 is opened to send the cold water to the oil-water heat exchanger 10 for heat exchange until the solar radiation is insufficient or the water storage tank 9 is full and can not store heat any more (the operation route is shown. The valve a7, the valve a8, the valve a9 and the valve a11 in the operation line are all opened, and the valves which are not in the operation line are all in a closed state.
The second operation mode is as follows: the photo-thermal system heat storage supplies heat to the steam turbine in the non-heating period
Under the non-heating working condition, the heat collected by the solar mirror field 3 is firstly stored in the water storage tank 9 (the running route is shown in the attached figure 2), the water storage tank 9 transmits the heat to the unit water return system for power generation, so that the coupling between the solar mirror field 3 and the unit condensed water system is realized (the running route is shown in the attached figure 3), the running line of the solar mirror field 3 for collecting the heat is the same as that in the first running mode (the running route is shown in the attached figure 4), the valve a10, the valve a12, the valve a15, the valve a16 and the valve a17 on the running line from the water storage tank 9 to the water supply heat exchanger 8 are all opened, and the valves which are not on the running line are all in a.
The third operation mode is as follows: the photo-thermal system and the heating steam simultaneously store heat to the water storage tank 10
When the solar radiation is sufficient and the power generation load of the steam turbine is high in the hot season, the valve a4, the valve a5 and the valve a6 are opened, the inlet and outlet valve a1 and the valve a3 of the oil-water heat exchanger 10 are closed, the main oil pump is started, the heat conducting oil is circulated, and the solar mirror field 3 collects heat (the operation route is shown in figure 4). The temperature of heat conducting oil at the outlet of the solar mirror field 3 is measured, when the temperature reaches the heat exchange temperature, an inlet valve a1 and a valve a3 of the oil-water heat exchanger 10 are opened, bypass valves a2 and a6 are closed, the heat storage water pump set 8 is opened to send cold water to the oil-water heat exchanger 10 for heat exchange, meanwhile, a part of cold water is pumped out from the bottom of the water storage tank 9 and is sent to the heating system 1 for heating through a pipeline until solar radiation is insufficient and heat is not provided by four pumping steam, or the water storage tank 9 is full and can not continue to store heat (the operation route is shown in figure 5). The valve a7, the valve a8, the valve a9, the valve a11, the valve a12 and the valve a18 on the operation line are all opened, and the valves which are not on the operation line are all in a closed state.
The fourth operation mode is as follows: the heating steam stores heat to the water storage tank 9.
When the power generation load of the steam turbine is high in a heat supply season, four-extraction steam is adopted to supply heat to the heat supply network in real time, the heat storage and release heat pump unit 8 is started according to the flow demand, cold water is extracted from the bottom of the water storage tank 9 and sent to the heating system 1 through a pipeline, the temperature of water at the outlet of the heating system 1 is controlled by controlling the flow of water flowing through the heating system 1, and heat supply network water coming out of the heat supply network heater 1 is sent back to the upper part of the water storage tank 10 through a pipeline (the running route is. The valve a9, the valve a11 and the valve a15 on the operation line are all opened, and the valves which are not on the operation line are all in a closed state.
The fifth operation mode: the heating steam and the water storage tank 9 simultaneously supply heat to the network users 6.
When the load of the steam turbine is reduced continuously, the four-extraction steam is not enough to meet the real-time heat supply requirement of the heat supply network, and hot water in the water storage tank 9 needs to be started to supply heat to the heat supply network user 6. Hot water at the top of a water storage tank 9 is pumped out by a heat storage and release pump group 8, and is sent to a flow mixer 2 through a pipeline, and is mixed with hot water from a main pipe at the outlet side of a heating system 1, and then the hot water is sent to a heat supply network user 6 for heat supply. Under the condition that the total flow of the circulating water of the heat supply network is determined, the water temperature at the outlet of the flow mixer 2 can be adjusted by controlling the hot water sending flow of the water storage tank 9 and the proportion of the heat supply network water flowing through the heating system 1. Cold water at the bottom of the water storage tank 9 is supplemented from a heat supply network circulating water pump outlet main pipe. The water level of the water storage tank 9 can be controlled by adjusting the balance of the cold water inlet flow and the hot water outlet flow through a water level control system (the operation route is shown in figure 7). The valve a10 and the valve a14 on the operation line are both opened, and the valves which are not on the operation line are both in a closed state.
Claims (5)
1. A novel photo-thermal-thermoelectric coupling system is characterized in that: the coupling system comprises an existing heater system (1), a solar mirror field (3), a main oil pump (4), an expansion tank (5), a heat supply network user (6), a water supply heat exchanger (7), a water storage tank (9) and an oil-water heat exchanger (10);
the existing heater system (1) is provided with a steam turbine interface, a deaerator interface, a heater system heat supply hot water output end, a heater system heat supply cold water input end, a heater system first cold water input end, a heater system second cold water input end and a heater system hot water output end;
a turbine interface of the existing heater system (1) is connected with a turbine through a pipeline, and a deaerator interface of the existing heater system (1) is connected with a deaerator through a pipeline;
the hot water supply output end of the heater system of the existing heater system (1) is connected with the hot water input end of the heat supply network user (6) through a hot water supply output pipeline of the heater system, and the hot water supply input end of the heater system of the existing heater system (1) is connected with the cold water output end of the heat supply network user (6) through a cold water supply input pipeline of the heater system;
a heater system I cold water input end of the existing heater system (1) is connected with a heat storage tank working pipeline through a heater system I cold water input pipeline, a heater system II cold water input end of the existing heater system (1) is connected with the heat storage tank working pipeline through a heater system II cold water input pipeline, and a heater system hot water output end of the existing heater system (1) is connected with the heat storage tank working pipeline through a heater system hot water output pipeline;
the water supply heat exchanger (7) comprises a first hot side output end, a first cold side hot water output end and a first cold side cold water input end; a hot water input end and cold water at the first hot side;
the first cold side hot water output end of the water supply heat exchanger (7) is connected with the hot water input end of the steam turbine backwater system through a pipeline, and the first cold side cold water input end of the water supply heat exchanger (7) is connected with the cold water output end of the steam turbine backwater system through a pipeline;
a first hot side hot water input end of the water supply heat exchanger (7) is connected with a heat storage tank working pipeline through a hot water input pipeline of the water supply heat exchanger, and a first hot side cold water output end of the water supply heat exchanger is connected with a heat storage tank working pipeline through a cold water output pipeline of the water supply heat exchanger;
the oil-water heat exchanger (10) comprises a hot side hot oil input end, a hot side cold oil output end, a second cold side hot water output end and a second cold side cold water input end;
a second cold side hot water output end of the oil-water heat exchanger (10) is connected with a heat storage tank working pipeline through an oil-water heat exchanger hot water output pipeline, and a second cold side cold water input end of the oil-water heat exchanger (10) is connected with the heat storage tank working pipeline through an oil-water heat exchanger cold water input pipeline;
the working pipeline of the heat storage tank is communicated with the water storage tank (9);
the hot oil output end of the solar mirror field (3) is connected with the hot side oil input end of the oil-water heat exchanger (10) through a mirror field hot oil output pipeline, the cold oil input end of the solar mirror field (3) is connected with the hot side cold oil output end of the oil-water heat exchanger (10) through a mirror field cold oil input pipeline, the expansion tank (5) is connected to the mirror field cold oil input pipeline in parallel, the main oil pump (4) is connected to the mirror field cold oil input pipeline in series, and the main oil pump (4) is arranged close to the cold oil input end of the solar mirror field (3).
2. A novel photothermal-thermoelectric coupling system according to claim 1 wherein: the heat storage tank working pipeline comprises a heat storage tank working main road, a storage and discharge heat pump group (8) is connected in series on the heat storage tank working main road, one end of the heat storage tank working main road is provided with a heat storage tank high-temperature water branch road and a heat storage tank low-temperature water branch road, a heat storage tank high-temperature water branch road is arranged on the heat storage tank high-temperature water road, one end of the heat storage tank high-temperature water branch road is communicated with the heat storage tank high-temperature water branch road, a heat storage tank low-temperature water branch road is arranged on the heat storage tank low-temperature water road, one end of the heat storage tank low-temperature water branch road is communicated with the heat storage tank low-temperature water branch road, one end of the heat storage tank high-temperature water branch road is connected with a high-temperature water port;
a second cold water input pipeline of the heater system and a hot water input pipeline of the water supply heat exchanger are connected with a working trunk line of the heat storage tank;
the hot water output pipeline of the heater system and the hot water output pipeline of the oil-water heat exchanger are both connected with the high-temperature water branch of the heat storage tank;
and a second cold water input pipeline of the heater system and a cold water output pipeline of the water supply heat exchanger are connected with a high-temperature water branch of the heat storage tank.
3. A novel photothermal-thermoelectric coupling system according to claim 2 wherein: the heat accumulation and release heat pump set (8) comprises two heat accumulation and release heat pumps which are arranged in parallel.
4. A novel photothermal-thermoelectric coupling system according to claim 3 wherein: and a communicating branch is also arranged between the hot oil output pipeline of the mirror field and the cold oil input pipeline of the mirror field.
5. A novel photothermal-thermoelectric coupling system according to claim 4 wherein: the utility model discloses a heater system heat supply hot water output pipeline, including heater system heat supply hot water output pipeline, heat storage tank heat supply hot water output pipeline, heater system heat supply hot water output pipeline's junction is equipped with mixed flow ware (2).
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| CN114857633A (en) * | 2022-03-30 | 2022-08-05 | 中冶西北工程技术有限公司 | Solar heat collection and supply system |
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