CN114017860B - Cooling control method and system for comprehensive utilization of solar energy and geothermal energy - Google Patents
Cooling control method and system for comprehensive utilization of solar energy and geothermal energy Download PDFInfo
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- CN114017860B CN114017860B CN202111151996.2A CN202111151996A CN114017860B CN 114017860 B CN114017860 B CN 114017860B CN 202111151996 A CN202111151996 A CN 202111151996A CN 114017860 B CN114017860 B CN 114017860B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
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Abstract
The invention belongs to the technical field of comprehensive utilization of geothermal energy and solar energy, and particularly discloses a cooling control method and system for comprehensive utilization of solar energy and geothermal energy. The invention relates to a method for controlling the opening degree of heat source flow flowing into an underground hot end and a solar end in a converging device by a control device based on the requirement change of real-time temperature at a user side so as to achieve the purpose of supplying, regulating and controlling heat energy at the user side. The invention can obtain signals according to the change of indoor and outdoor temperature, the control device synchronously adjusts the heat source flow opening of the ground heat end and the solar end, the mixed heat source in the flow evaporator is promoted to change, and then the cold pump at the cold supply end circulates, so that the cold supply at the condenser end is adjusted and controlled to achieve the adjustment and control of the cold energy supply at the user side.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of geothermal energy and solar energy, in particular to a cooling control method and system for comprehensive utilization of solar energy and geothermal energy.
Background
The traditional energy sources such as coal, oil and natural gas belong to nonrenewable resources, and along with the continuous development and utilization of the resources, the development of novel energy sources is imminent, and the novel energy sources comprise wind energy, geothermal energy, solar energy and the like, which become main channels for the development of future energy sources.
In new energy, solar energy is used for converting light energy into electric energy, solar applications include photovoltaic power generation and photovoltaic heating, and photovoltaic power generation includes photovoltaic power stations and distributed power generation; the cold supply mode has the advantages that the cold supply mode belongs to clean energy and the storage capacity is nearly unlimited, electric energy can be stored through the storage technology of the storage battery pack and applied to the cold supply technology, and geothermal energy refrigeration drives the process of refrigeration of the absorption refrigeration equipment by taking the heat energy provided by geothermal steam or geothermal water as the heat source as power.
In the disclosed technology, there is also a technology for comprehensively utilizing wind energy, solar energy and geothermal energy, however, the cooling user side in summer changes with the changes of weather and air temperature, generally the temperature at night is the lowest, the temperature is the highest in the section from 12 o 'clock to 3 o' clock in the day, the cooling needs to be adjusted for different time ranges, or adjusted according to the changes of weather, however, the geothermal energy is relatively constant, the solar energy and the wind energy have great variables due to weather factors, and the temperature adjustment for cooling measurement has variability when various energy sources are comprehensively utilized.
Disclosure of Invention
In view of the above, the present invention provides a cooling control method and system for comprehensive utilization of solar energy and geothermal energy.
The technical scheme adopted by the invention is as follows:
the invention provides a cooling control system for comprehensively utilizing solar energy and geothermal energy, which comprises:
a user side having a plurality of user units;
the evaporator circularly supplies cold to the user side through a cold supply end cold pump;
the condenser is connected with the evaporator, and the released geothermal source conveys the organic working medium to the evaporator;
the output end of the confluence device is connected with the input end of a user side, the input end of the confluence device is respectively connected with the output end of the evaporator and the solar refrigeration system, and an adjusting core body is arranged in the confluence device and is connected with the motor assembly through an adjusting rod;
a control device;
the control device obtains a regulation signal according to the change of indoor and outdoor temperatures of a user side, receives the regulation signal and loads a regulation mechanism, based on the regulation mechanism, the judgment module judges a control instruction corresponding to the regulation signal in the regulation mechanism, the control device sends the control instruction to drive the motor to drive the adjusting rod to control the movement of the adjusting core body in the converging device, so as to synchronously adjust the flow opening of the refrigeration sources of the geothermal end and the solar end, so that the mixed cold source flowing through the user side is changed, and then the cold source is circulated through the cold supply end cold pump, so that the cold supply of the evaporator end is regulated and controlled to achieve the regulation control of the cold energy supply of the user side.
Preferably, the geothermal energy heating system comprises:
the underground heat exchanger is arranged in the geothermal well, and water in the underground heat exchanger flows back into the geothermal well through the ground source side circulating pump after being cooled by the evaporator through the confluence device.
Preferably, the solar refrigeration system comprises:
a solar cell panel, which stores the converted direct current in a storage battery pack through a controller after light and electric energy conversion,
the storage battery pack is connected with an inverter, and the inverter converts direct current into alternating current;
the alternating current converted by the inverter supplies power to the cooling tower and the ice storage device;
the cooling tower cools the refrigerant water through the electric energy conversion and supplies the refrigerant water to the confluence device through the ice cold storage device,
after absorbing heat from the user side, the cooling liquid flows back to the cooling tower through the cold supply end cold pump.
Preferably, the ice storage device comprises an ice storage unit, an ice storage tank, a first heat exchanger and a second heat exchanger;
the ice cold accumulation machine set is connected with the cooling tower and is used for storing the cold energy of the cooling tower;
the ice cold accumulation unit, the ice accumulation groove and the first heat exchanger are connected in sequence through a heat exchange medium pipeline to form a first cold accumulation end; the ice cold accumulation unit and the second heat exchanger are connected through a heat exchange medium pipeline to form a second cold accumulation end;
the heat exchange medium is ethylene glycol;
and the output ends of the first cold storage end and the second cold storage end are connected with the input end of the confluence device.
Preferably, the water replenishing system also comprises a water replenishing system,
this water charging system includes:
one end of the water softening equipment is connected with a tap water pipeline, the other end is connected with a water softening tank,
the softened water tank supplies water to the cooling tower through a first water supply pump,
and water is supplied to the ground source side circulating pipeline through a second water pump.
Preferably, the confluence means comprises:
a bus housing;
the interior of the confluence shell is a confluence regulating cavity, a confluence regulating core body is arranged in the confluence regulating cavity,
the confluence regulating core body divides the confluence regulating cavity into two closed confluence left area and confluence right area,
a confluence shell at one side of the confluence left area is provided with a confluence left inlet,
a confluence right inlet is arranged on the confluence shell at one side of the confluence right area, an
The adjusting core body middle position that converges just is located and converges left import, the contralateral of right import of converging and is provided with respectively and converges left export and right export of converging, and the left export of converging and right export of converging and the union coupling intercommunication of converging, the union coupling is fixed on the casing that converges, and the union coupling sets up by two independent branch pipes, is convenient for be connected with diverging device.
One end of the confluence adjusting rod is fixed on the left side of the confluence adjusting core body, the other end of the confluence adjusting rod penetrates through the confluence shell to be fixed with the confluence fixing block, the confluence fixing block is fixed on the confluence lead screw nut, the confluence lead screw nut is fixed on the confluence linear lead screw, and the confluence linear lead screw is fixed on the confluence motor;
the control device drives the confluence motor to drive the confluence linear screw rod to rotate according to the control instruction so as to drive the confluence screw rod nut to linearly move on the confluence linear screw rod, and the confluence screw rod nut drives the confluence adjusting rod to control the confluence adjusting core body in the confluence device to move so as to synchronously adjust the opening degree of the confluence left inlet and the confluence right inlet.
The core left side is adjusted to converge is provided with the left spring mounting groove that converges, is provided with the left spring that converges in the left spring mounting groove that converges, it is provided with the right spring mounting groove that converges to adjust the core right side to converge, is provided with the right spring that converges in the right spring mounting groove that converges.
When the confluence adjusting core body moves in the confluence adjusting cavity, the confluence left inlet/confluence right inlet is shielded or kept away to form flow reduction and flow increase.
The invention also provides a solar energy and geothermal energy comprehensive utilization cooling control method, which is a method for controlling the flow opening of the hot end refrigeration source and the flow opening of the solar end refrigeration source flowing into the confluence device by a control device based on the real-time temperature demand change at the user side so as to achieve regulation and control of the cold energy supply at the user side, and the method comprises the following steps:
the control device obtains a regulation signal according to the change of indoor and outdoor temperatures of a user side, receives the regulation signal and loads a regulation mechanism, based on the regulation mechanism, the judgment module judges a control instruction corresponding to the regulation signal in the regulation mechanism, the control device sends the control instruction to drive the motor to drive the adjusting rod to control the movement of the adjusting core body in the converging device, so as to synchronously adjust the flow opening of the refrigeration sources of the geothermal end and the solar end, so that the mixed cold source flowing through the user side is changed, and then the cold source is circulated through the cold supply end cold pump, so that the cold supply of the evaporator end is regulated and controlled to achieve the regulation control of the cold energy supply of the user side.
Preferably, the regulation and control mechanism is used for synchronously regulating and controlling the flow opening of the refrigeration sources flowing into the ground heat end and the solar end in different levels in a plurality of regulation and control ranges set based on the change of indoor and outdoor temperatures of the user side, and the cold supply of the evaporator end is regulated and controlled through the circulation of the cold pump at the cold supply end so as to achieve the regulation and control of the cold energy supply of the user side.
The invention provides a form of comprehensively utilizing solar energy and geothermal energy for cooling, which can acquire regulation and control signals according to the collected indoor and outdoor temperature changes of a user side, a control device receives the regulation and control signals and loads a regulation and control mechanism, sends a control instruction to drive a motor to drive an adjusting rod so as to control an adjusting core body in a confluence device to move, synchronously adjusts the flow opening of a refrigeration source at an evaporator end and a solar end, and then circulates through a cold pump at a cooling end, so that the cooling at the evaporator end is regulated and controlled to achieve the regulation and control of the cooling energy supply at the user side.
In the invention, the geothermal energy is relatively stable as the heat source, so that the geothermal energy can be regarded as relatively constant, and the temperature of the cooling tower and the ice storage device is controlled to change the cooling tower and the ice storage device as the cold source to mainly regulate and control so as to provide relatively stable cold supply.
Drawings
The invention is illustrated and described only by way of example and not by way of limitation in the scope of the accompanying drawings, in which:
FIG. 1: the invention is a frame principle schematic diagram of the system;
FIG. 2 is a schematic diagram: the invention is a schematic connection diagram of a cooling tower and an ice cold storage device;
FIG. 3: the structure schematic diagram of the confluence device of the invention;
in the figure: 100-geothermal well, 101-ground source side circulating pump, 102-cooling tower, 103-condenser, 104-evaporator, 105-cold supply end cold pump, 106-user side, 107-ice cold storage device, 1071-ice cold storage unit, 1072-heat exchange medium pipeline, 1073-second heat exchanger, 1074-ice storage tank, 1075-first heat exchanger, 108-inverter, 109-storage battery, 110-solar panel, 111-pressure gauge, 2-confluence device, 200-confluence shell, 201-confluence left outlet, 202-confluence joint, 203-confluence right outlet, 204-confluence right spring, 205-confluence right inlet, 206-confluence regulation core, 207-confluence left inlet, 208-confluence left spring, 209-confluence regulation rod, 210-confluence fixed block, 211-confluence lead screw nut, 212-confluence linear lead screw, 213-confluence motor, 3-control device, 4-water replenishing system, 400-second water pump, 401-softened water tank, 402-softened water tank, and first water replenishing pump 403.
Detailed Description
In order to make the objects, technical solutions, design methods, and advantages of the present invention more apparent, the present invention will be further described in detail by specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
Referring to fig. 1 to 3, the present invention provides a cooling control method for comprehensive utilization of solar energy and geothermal energy, which is a method for controlling the flow opening of hot-end cooling source and the flow opening of solar-end cooling source flowing into the heat sink 2 by the control device 3 based on the real-time temperature demand change of the user side 106, so as to achieve the regulation control of the cooling energy supply of the user side 106, and the method comprises:
the control device 3 obtains a regulation signal according to the change of the indoor and outdoor temperatures of the user side, receives the regulation signal and loads the regulation mechanism, based on the regulation mechanism, the judgment module judges a control instruction corresponding to the regulation signal in the regulation mechanism, the control device 3 sends the control instruction to drive the confluence motor 213 to drive the confluence adjusting rod 209 to control the movement of the confluence adjusting core 206 in the confluence device 2, so as to synchronously adjust the flow opening of the refrigeration sources at the geothermal end and the solar end, so that the mixed cold source flowing through the user side is changed, and then the mixed cold source is circulated through the cold supply end cold pump 105, so that the evaporator end 104 is regulated and controlled to supply cold to achieve the regulation control of the cold energy supply at the user side.
In the above, the regulation and control mechanism is to synchronously regulate and control the flow opening of the refrigeration source flow of the ground heat end and the solar end flowing into the confluence device at different levels within a plurality of regulation and control ranges set based on the change of the indoor and outdoor temperatures of the user side, and the cold supply of the evaporator end is regulated and controlled through the circulation of the cold supply end cold pump, so as to achieve the regulation and control of the cold energy supply of the user side.
In the above description, the changes of the indoor and outdoor temperatures of the user side 106 can be measured by the temperature sensors, and in the implementation of the present invention, the average value obtained by the indoor and outdoor temperature sensors can be used as the reference. Of course, the temperature sensor may also be used to measure the cooling temperature when the user side 106 enters the home, the return temperature of the return flow after entering the home, and the outdoor temperature as the temperature collection point. The invention is not limited based on which manner.
In the method, the method specifically comprises the following steps: according to the temperature change measured by the temperature sensor, the control device 3 calculates a reference according to the temperature change, a regulation signal is formed according to the reference, the control device 3 selects a corresponding preset regulation scheme from the regulation mechanisms according to the regulation signal, the regulation mechanisms are different levels of regulation schemes set according to the indoor and outdoor temperature changes, for example, when the indoor temperature is higher than a set comfort value (generally, the indoor temperature is 18 ℃ is a lower comfort limit, the indoor temperature is 16 ℃ is a lower temperature supply limit, the indoor temperature is 20-24 ℃ is an optimal comfort temperature area, the indoor temperature is 26 ℃ is an upper comfort limit, and the indoor temperature is 28 ℃ is an upper temperature supply limit), such as an indoor average temperature is critical 26 ℃, at this time, if the optimal comfort area is reached, under the condition of not considering the weather and the external temperature, the proportion of the flow opening of the refrigeration source flowing into the indoor heat end and the solar end of the confluence device 2 needs to be regulated.
It should be noted that the geothermal energy is very stable as a heat source, and it does not change with the change of weather and air temperature, therefore, the geothermal energy can be set as a heat source in a fixed value interval during the regulation. Under the condition of not considering weather and outside air temperature, the flow opening of the refrigeration source at the solar end is preferentially regulated and controlled.
When the solar end is used as a refrigeration source for preferential regulation, the following two situations can be adopted.
First, the ratio of the opening degree of the refrigeration source flow flowing into the geothermal end and the solar end in the flow converging device 2 is set to be constant, such as geothermal end: the solar end is 2: when the temperature is required to be reduced, the temperature of the refrigeration source of the solar end is only required to be adjusted.
Second, the temperatures of the cooling sources flowing into the evaporator 103 and the solar side in the junction device 2 are set to be constant, for example, the average temperature of the evaporator 103 side is 30 ℃: the average temperature of the solar energy end is 10 ℃, and if the indoor temperature comfortable value is reached, the indoor temperature can be reached only by keeping the temperature between 20 ℃ and 24 ℃ when the solar energy end enters a home. At this time, it is necessary to adjust the ratio of the cooling source flow opening degree between the evaporator 103 side and the solar side in the confluence device 2. Based on the above, a regulation mechanism can be set and stored in the control device 3.
In addition to the above-described adjustment scenarios, a third adjustment scenario is also included, which is a dynamic adjustment of both the first and second scenarios. Since the above points out that the first and second are relatively easy to implement without considering weather and outside air temperature, the outdoor temperature and the power generation condition of the solar energy end are affected by different weather and different outdoor temperatures in different time periods of each day. The third situation is based on dynamic regulation which is set according to the power supply quantity of the solar end under the condition of influencing outdoor temperature and power generation of the solar end.
According to experience, practical measurement and solar tile installation conditions, the upper limit value and the lower limit value of the generated energy of each balance at the solar end can be obtained, the upper limit value and the lower limit value of the output refrigerating source flow acting on the vacuum boiler every day can be obtained, and after the factors are considered, a regulation mechanism can be set and stored in the control device 3.
The invention provides a form of utilizing solar energy and geothermal energy for comprehensive utilization and heating, which can obtain regulation and control signals according to the collected indoor and outdoor temperature changes of a user side 106, a control device 3 receives the regulation and control signals and loads a regulation and control mechanism, sends a control instruction to drive a confluence motor 213 to drive a driving adjusting rod 209 to control a confluence adjusting core 206 in a confluence device 2 to move so as to synchronously adjust the flow opening of refrigeration sources at a geothermal end and a solar end, promote a mixed heat source in a flow evaporator to change, and circulate through a cold supply end cold pump 105, thereby regulating and controlling the cold supply at an evaporator 104 end to achieve the regulation and control of the cold energy supply at the user side 106.
In order to facilitate the implementation of the control method, the invention also provides a cooling control system for comprehensively utilizing solar energy and geothermal energy, which comprises the following steps:
a user side 106 having a plurality of user units;
an evaporator 104 for cooling the user side by circulating through a cooling side pump 105;
the condenser 103 is connected with the evaporator 104, and the released geothermal source conveys the organic working medium to the evaporator;
the output end of the confluence device 2 is connected with the input end of the user side 106, the input end of the confluence device is respectively connected with the output end of the evaporator 104 and the solar refrigeration system, a confluence adjusting core 206 is arranged in the confluence device 2, and the confluence adjusting core 206 is connected with the motor assembly through an adjusting rod;
and a control device 3;
the control device 3 obtains a regulation signal according to the indoor and outdoor temperature changes of the user side 106, receives the regulation signal and loads the regulation mechanism, based on the regulation mechanism, the judgment module judges a control instruction corresponding to the regulation signal in the regulation mechanism, the control device 3 sends the control instruction to drive the motor to drive the regulating rod so as to control the movement of the regulating core body in the confluence device 2, so as to synchronously regulate the flow opening degrees of the refrigeration sources at the evaporator 104 end and the solar end, and then the refrigeration source flows circulate through the cold supply end refrigeration pump 105, so that the cold supply at the condenser 104 end is regulated and controlled to achieve the regulation control of the supply of the heat energy at the user side.
In the above, the geothermal energy heating system includes:
the system comprises a geothermal well 100 and a downhole heat exchanger arranged in the geothermal well 100, wherein water in the downhole heat exchanger flows back into the geothermal well 100 through a ground source side circulating pump 101 after being cooled by a converging device 2 and an evaporator 103.
In the above, the solar refrigeration system comprises:
a solar cell panel 110, wherein the solar cell panel 110 converts light and electric energy to store the converted direct current in the storage battery 109 through the controller,
the storage battery pack 109 is connected with the inverter 108, and the inverter 108 converts direct current into alternating current;
the alternating current converted by the inverter 108 supplies power to the cooling tower 102 and the ice storage device 107;
the cooling tower 102 cools the chilled water by the conversion of electric energy and supplies the chilled water to the confluence device 2 through the ice thermal storage device 107,
absorbs heat from the user side 106 and flows back to the cooling tower 102 through the cooling end pump 105.
In the above, the ice storage device includes an ice storage unit 1071, a heat exchange medium pipeline 1072, an ice storage tank 1074, a first heat exchanger 1075 and a second heat exchanger 1073;
the ice storage unit 1071 is connected with the cooling tower 102 and stores the cold energy of the cooling tower 102;
the ice storage unit 1071, the ice storage tank 1074 and the first heat exchanger 1075 are connected in sequence through a heat exchange medium pipeline 1072 to form a first heat storage end; the ice cold storage unit 1071 and the second heat exchanger 1073 are connected through a heat exchange medium pipeline 1072 to form a second cold storage end;
the heat exchange medium is glycol;
the output ends of the first cold storage end and the second cold storage end are connected with the input end of the confluence device 2.
Wherein, the first heat exchanger is a water-water heat exchanger, and the second heat exchanger is a glycol-water heat exchanger.
The final ice storage basic form is as follows:
(1) By using a system with a main unit connected in series upstream
The host machine in the form has higher water inlet and outlet temperature and higher operating efficiency, and simultaneously can easily realize the control strategy of host machine priority and ice melting priority control.
(2) The ice melting mode is external ice melting
The external ice melting mode directly adopts water in the ice storage tank as a cold taking medium, ice is melted inwards from the outer surface of the icicle and is cooled by direct contact, the cold taking efficiency is higher, the cold taking temperature is lower, the ice melting energy consumption is low, the water temperature can be kept at 0-2 ℃ for a long time, the cold taking process is more stable, and the external ice melting mode is suitable for large-scale engineering of ice storage.
(3) Cold storage capacity is designed according to part cold storage
The ice storage device of part cold-storage system only bears part air conditioner cold load, and the dual-working condition host machine is used for making ice and storing part cold quantity in the night electric power valley period, and one part of ice storage device of air conditioner cold load is used for bearing, and another part is provided by the dual-working condition host machine operating air conditioner working condition.
The mode makes full use of the dual-working-condition host machine, so that the design capacity of the ice storage device is greatly reduced, the initial investment of the system is also reduced to a reasonable range, and the ice storage device has a satisfactory investment return period while obtaining considerable economic benefits in the whole life cycle and is the first choice of most of projects at present.
In the design of the actual project, objective conditions such as initial investment budget of the system, available space of a machine room, building functional characteristics, an annual load curve and the like need to be considered for selecting the ice storage amount. In general project design, when the ice storage amount is about 25-40% of the total cold amount, the optimal investment return is provided.
System main parameters
The peak-to-valley electricity prices of the project are executed according to the energy trade area land, and are shown in the following table:
according to the working and rest time of the public building, the cooling time is 12 hours from 7 to 19, and the night ice storage time is 23 to 07.
(1) Dual mode host selection
The project adopts a partial cold accumulation mode, and the model selection of the refrigerator and the model selection of the ice storage device are calculated according to the following steps:
qc is as follows: refrigerating machine refrigerating capacity under cold accumulation working condition, (kW);
and Qs: daily cold storage capacity, (kWh);
n1: hours (h) of operation of the refrigerator under the ice making working condition at night;
cf: the change rate of the refrigerating capacity when the refrigerator makes ice, namely the ratio of the actual refrigerating capacity to the calibrated refrigerating capacity, is generally 0.6-0.7;
n2: the number of hours (h) for the refrigerator to run under the air conditioning condition in the daytime.
According to the actual conditions of the project, ice making is carried out for 8h at night, the working condition of the air conditioner is 12h in the daytime, the conversion coefficient of the refrigerating machine is 0.65, and when the ice storage amount of the project is 30% of the total daily cold, the ice storage amount is 432205.68kWh. According to the calculation formula, the total capacity of the required dual-working-condition main engine is 25128.3kW. 3 air-conditioning working condition refrigerating capacities 2500RT (8750 kW) double-working condition refrigerators are selected.
(2) Ice storage tank model selection
At present, the common ice storage devices comprise ice storage equipment such as an ice coil pipe, an ice ball, an ice plate and the like, the ice coil pipe is most widely used at present, and the coil pipe comprises a steel coil pipe and a plastic coil pipe. The steel ice coil pipe is made in a factory, the whole installation process is less, the installation is convenient, and the heat exchange efficiency of unit area is highest. The pipe has the characteristics of large pipe diameter, small using amount of glycol solution, uniform ice melting rate and the like. And 4, calculating the ice storage capacity at night for 8h, wherein the ice storage capacity is 39000RTh.
In the above, a water replenishing system 4 is also included,
this water charging system 4 includes:
a water softening device 402 with one end connected to a tap water pipeline and the other end connected to the water softening tank 401,
the softened water tank 401 supplies water to the cooling tower through a first water supply pump 403,
and supplies water to the ground source side circulation pipeline through the second water pump 400.
Referring to fig. 3, the bus bar device 2 includes:
a bus case 200;
the interior of the confluence housing 200 is a confluence regulated chamber, in which a confluence regulated core 206 is disposed,
the confluence conditioning core 206 divides the confluence conditioning chamber into two closed confluence left and right zones,
a confluence left inlet 207 is arranged on the confluence shell at one side of the confluence left area,
a confluence right inlet 205 is formed on the confluence housing at one side of the confluence right region, an
The middle position of the confluence adjusting core body 206 and the opposite sides of the confluence left inlet and the confluence right inlet are respectively provided with a confluence left outlet 201 and a confluence right outlet 203, the confluence left outlet 201 and the confluence right outlet 203 are communicated with a confluence connector 202, the confluence connector is fixed on a confluence shell, and two independent branch pipes are arranged in the connector 202, so that the connection with the flow dividing device 5 is facilitated.
A confluence adjusting rod 209, one end of which is fixed on the left side of the confluence adjusting core 206, and the other end of which passes through the confluence shell 200 and is fixed with a confluence fixing block 210, wherein the confluence fixing block 210 is fixed on a confluence screw nut 211, the confluence screw nut 211 is fixed on a confluence linear screw 212, and the confluence linear screw 212 is fixed on a confluence motor 213;
the control device 3 drives the confluence motor 213 to drive the confluence linear screw 212 to rotate according to the control command, so as to drive the confluence screw nut 211 to move linearly on the confluence linear screw 212, and the confluence screw nut 211 drives the confluence adjusting rod 209 to control the movement of the confluence adjusting core 206 in the confluence device 2, so as to synchronously adjust the opening degrees of the confluence left inlet 207 and the confluence right inlet 205.
Specifically, the confluence left inlet 207 is connected to an output end of the evaporator 104, and the confluence right inlet 205 is connected to the first cold storage end and the second cold storage end. The converging left outlet 201 and the converging right outlet 203 are both connected to the user side 106.
The left side of the confluence adjusting core body 206 is provided with a confluence left spring installation groove, a confluence left spring 208 is arranged in the confluence left spring installation groove, the right side of the confluence adjusting core body is provided with a confluence right spring installation groove, and a confluence right spring 204 is arranged in the confluence right spring installation groove, so that the stability of movement of the confluence adjusting core body 206 is improved, and the confluence adjusting core body 206 is convenient to return and center after one motion stroke.
When the confluence adjustment core body 206 moves in the confluence adjustment cavity, the confluence left inlet/the confluence right inlet is shielded or kept away to form flow reduction and flow increase.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. Solar energy, geothermal energy comprehensive utilization cooling control system, its characterized in that includes:
a user side having a plurality of user units;
the output end of the evaporator is connected with the confluence device;
the condenser is connected with the evaporator, releases the heat of the geothermal energy heating system and conveys the organic working medium to the evaporator;
the device that converges, the output is connected with the input of user's side, and the input is connected respectively with the output and the solar energy refrigerating system of evaporimeter, the device that converges includes:
a bus housing;
the interior of the confluence shell is provided with a confluence adjusting cavity, a confluence adjusting core body is arranged in the confluence adjusting cavity,
the confluence regulating core body divides the confluence regulating cavity into two closed confluence left area and confluence right area,
a confluence shell at one side of the confluence left area is provided with a confluence left inlet,
a confluence right inlet is arranged on the confluence shell at one side of the confluence right area, an
A confluence left outlet and a confluence right outlet are respectively arranged in the middle of the confluence adjusting core body and on the opposite sides of the confluence left inlet and the confluence right inlet, the confluence left outlet and the confluence right outlet are communicated with a confluence connector, and the confluence connector is fixed on the confluence shell;
one end of the confluence adjusting rod is fixed on the left side of the confluence adjusting core body, the other end of the confluence adjusting rod penetrates through the confluence shell body and is fixed with the confluence fixing block, the confluence fixing block is fixed on a confluence lead screw nut, the confluence lead screw nut is fixed on a confluence linear lead screw, and the confluence linear lead screw is fixed on a confluence motor;
the control device drives the confluence motor to drive the confluence linear screw rod to rotate according to the control instruction so as to drive the confluence screw rod nut to linearly move on the confluence linear screw rod, and the confluence screw rod nut drives the confluence adjusting rod to control the confluence adjusting core body in the confluence device to move so as to synchronously adjust the opening degree of the confluence left inlet and the confluence right inlet;
a control device;
acquiring a regulation signal according to the indoor and outdoor temperature change of a user side, receiving the regulation signal by a control device and loading the regulation signal, judging a control instruction corresponding to the regulation signal in the regulation mechanism by a judgment module based on the regulation mechanism, sending the control instruction by the control device to drive a motor to drive an adjusting rod so as to control the movement of an adjusting core body in a confluence device, synchronously adjusting the flow opening of refrigeration sources of a geothermal end and a solar end, changing the mixed cold source of the flowing user side, and circulating through a cold pump of a cold supply end so as to regulate and control the cold supply of an evaporator end and a solar refrigeration system to achieve the regulation and control of the cold energy supply of the user side;
when the confluence adjusting core body moves in the confluence adjusting cavity, the confluence left inlet/confluence right inlet is shielded or kept away to form flow reduction and flow increase.
2. The solar and geothermal energy integrated utilization cooling control system according to claim 1, wherein the geothermal energy heating system comprises:
the underground heat exchanger is arranged in the geothermal well, and water in the underground heat exchanger is cooled by the condenser and then flows back into the geothermal well through the ground source side circulating pump.
3. The solar and geothermal energy integrated utilization cooling control system according to claim 1, wherein the solar refrigeration system comprises:
a solar cell panel, which converts light and electric energy to store the converted direct current in a storage battery pack through a controller,
the storage battery pack is connected with an inverter, and the inverter converts direct current into alternating current;
the alternating current converted by the inverter supplies power to the cooling tower and the ice storage device;
the cooling tower cools the refrigerant water through the conversion of electric energy and supplies cold energy to the confluence device through the ice cold storage device,
after absorbing heat from the user side, the cooling liquid flows back to the cooling tower through the cold supply end cold pump.
4. The solar energy and geothermal energy comprehensive utilization cooling control system according to claim 3, wherein the ice storage device comprises an ice storage unit, an ice storage tank, a first heat exchanger and a second heat exchanger;
the ice cold accumulation machine set is connected with the cooling tower and is used for storing the cold energy of the cooling tower;
the ice cold accumulation unit, the ice accumulation groove and the first heat exchanger are connected in sequence through a heat exchange medium pipeline to form a first cold accumulation end; the ice cold accumulation unit and the second heat exchanger are connected through a heat exchange medium pipeline to form a second cold accumulation end;
the heat exchange medium is glycol;
and the output ends of the first cold storage end and the second cold storage end are connected with the input end of the confluence device.
5. The cooling control system for comprehensive utilization of solar energy and geothermal energy according to claim 1, further comprising a water charging system,
this water charging system includes:
one end of the water softening equipment is connected with a tap water pipeline, the other end is connected with a water softening tank,
the softened water tank supplies water to the cooling tower through a first water supply pump,
and water is supplied to the ground source side circulating pipeline through a second water pump.
6. The cooling control system according to claim 1, wherein a confluence left spring installation groove is formed in the left side of the confluence adjustment core, a confluence left spring is arranged in the confluence left spring installation groove, a confluence right spring installation groove is formed in the right side of the confluence adjustment core, and a confluence right spring is arranged in the confluence right spring installation groove.
7. The method for controlling cooling by using a cooling control system for comprehensive utilization of solar energy and geothermal energy according to any one of claims 1 to 6, wherein the method controls the flow opening of the hot-end refrigeration source and the flow opening of the solar-end refrigeration source flowing into the confluence device by a control device based on the change of the real-time temperature requirement at the user side so as to achieve the regulation control of the cooling energy supply at the user side, and the method comprises the following steps:
the control device obtains a regulation signal according to the indoor and outdoor temperature change of the user side, receives the regulation signal and loads the regulation mechanism, based on the regulation mechanism, the judgment module judges a control instruction corresponding to the regulation signal in the regulation mechanism, the control device sends the control instruction to drive the motor to drive the adjusting rod so as to control the movement of the adjusting core body in the confluence device, the flow opening of the refrigeration sources of the geothermal end and the solar end is synchronously adjusted, the mixed cold source of the flowing user side is promoted to change, and then the circulation of the cold pump of the cold supply end is carried out, so that the cold supply of the evaporator end and the solar refrigeration system is regulated and controlled to achieve the regulation control of the cold energy supply of the user side.
8. The system of claim 7, wherein the control mechanism is configured to synchronously control the flow opening of the cooling sources flowing into the geothermal end and the solar end of the combiner in different levels within a plurality of control ranges based on the change of the indoor and outdoor temperatures of the user side, and the cooling of the evaporator end and the solar cooling system is controlled by the circulation of the cooling pump at the cooling end to achieve the control of the cooling energy supply at the user side.
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