CN108278653B - Intelligent heat supply regulation and control system for large public building based on solar energy - Google Patents

Abstract

The invention relates to a solar-based intelligent heating regulation and control system for a large public building. The system has the advantages of simple structure, high operation efficiency and strong self-control, office staff can independently operate and adjust the system according to the situation, the thermal comfort of indoor staff is improved, and the system is enabled to operate efficiently and reasonably; the system has low running cost, and the phase change energy storage water tank replaces the air source heat pump system at night, so that the running cost of equipment is greatly reduced; the invention has wide application range, can be applied to villas, residential buildings and the like, and can well meet market demands.

Description

Intelligent heat supply regulation and control system for large public building based on solar energy

Technical Field

The invention relates to the technical fields of building energy conservation, renewable energy utilization and intelligent control, in particular to a large public building intelligent heat supply regulation and control system based on solar energy and an operation method thereof.

Background

The energy source is taken as a material basis for survival and development of human society, and is closely related to development of human economy and society and improvement of living standard. Moreover, energy shortage has become one of the biggest problems faced by humans, and environmental problems such as climate warming and pollution caused by energy problems have become an important factor restricting economic development. Development of new energy and implementation of various energy-saving measures are important ways for solving the energy problem. At present, heating in China mainly comprises a heat source, a heat supply network and heat users, an intelligent system does not carry out automatic control on the heat source, operation management, overhaul and maintenance are needed manually, and although an air source heat pump and solar heat collector combined heating system is an efficient and energy-saving system, because of uncertain factors such as weather, time and satisfaction degree of indoor personnel on temperature and the like and lack of good operation control strategies, the needed heat supply quantity and the actual heat supply quantity have larger in-out, so that energy waste and unit operation cost are increased, and a large-scale heat supply intelligent regulation and control system is needed to replace the traditional manual control to solve the problems of dissatisfaction degree of personnel on comfort degree, energy waste, cost increase and the like, so that the system operates efficiently and reasonably.

The energy development mode is changed from extensive type to intensive type, the energy structure is changed from coal as main material to diversified type, and the energy utilization rate is further increased. However, in the conventional air source heat pump system, when the night duty and the overtime duty need to heat and prevent freezing and protecting the pipeline, the air source heat pump system needs to be operated, which greatly increases the operation cost, and the redundant heat generated by the air source heat pump is wasted due to the fact that the heat cannot be stored.

In summary, it is important to design a large heating system that can not only operate efficiently and reasonably, but also reduce the system operation cost and reduce the energy waste.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an intelligent heat supply regulation and control system for a large-scale public building based on solar energy and an operation method thereof. The system realizes remote control of the heating system by office workers and duty workers, the control center regulates and controls the system according to factors such as weather, time and the like, the defect of energy waste caused by single system operation is overcome, and meanwhile, the heat stored by the phase-change energy storage water tank in the daytime and prepared by the solar trough type heat collector and the air source heat pump is used at night, so that the problem of cost increase caused by operating the air source heat pump system is avoided, and the system is enabled to operate efficiently and reasonably.

The technical scheme for solving the technical problems is as follows: the intelligent heating regulation and control system for the large public building based on solar energy is characterized by comprising a fan coil, a solar trough type heat collector, a phase-change energy storage water tank, a compressor, an evaporator, an expansion valve, a condenser, a water separator, a water collector and an intelligent control unit;

the outlet end of one side of the condenser is connected with the expansion valve, and the outlet end of the other side of the condenser is connected with a heating area; the expansion valve is connected with the compressor through the evaporator, the outlet of the compressor is connected with the inlet of the condenser, and the compressor, the evaporator, the expansion valve and the condenser form an air heat source pump; the condenser water outlet pipe B1 positioned at the side of the heating area is connected with one end of the three-way reversing valve S1 through the electric two-way valve J1, the second end of the three-way reversing valve S1 is connected with one end of the electromagnetic valve Y1, and the third end of the three-way reversing valve S1 is connected with the phase-change energy storage water tank water inlet pipe C1; the other end of the electromagnetic valve Y1 is respectively connected with a phase-change energy storage water tank water outlet pipe C2 and a water separator water inlet pipe D1, and a circulating water pump P2 is arranged between the water separator water inlet pipe D1 and the electromagnetic valve Y1; the condenser water inlet pipe B2 positioned at one side of the expansion valve is connected with the water collector water outlet pipe E1 through an electric two-way valve J2, a flowmeter, a three-way reversing valve S2, a circulating water pump P3 and a flowmeter in sequence; the water outlet pipe of the water separator is connected with the water inlet of the corresponding fan coil through the corresponding electric two-way valve respectively; the water inlet pipe of the water collector is connected with the water outlet of the corresponding fan coil through the corresponding electric two-way valve respectively; the third end of the three-way reversing valve S2 is connected with a phase-change energy storage water tank water inlet pipe C3, a phase-change energy storage water tank water outlet pipe C4 is externally connected to a pipeline between the three-way reversing valve S2 and the circulating water pump P3, and the phase-change energy storage water tank water outlet pipe C4 is also provided with a circulating water pump P1; the water inlet pipes C1 and C3 of the phase-change energy storage water tank are respectively connected with two water inlets of the phase-change energy storage water tank through electromagnetic valves Y2 and Y4; the water outlet pipes C2 and C4 of the phase-change energy storage water tank are respectively connected with two water outlets of the phase-change energy storage water tank through electromagnetic valves Y3 and Y5; the inlet pipe F2 of the solar trough type heat collector is connected with the outlet of the phase-change energy storage water tank through the booster pump P4, and the outlet pipe F1 of the solar trough type heat collector is connected with the inlet of the phase-change energy storage water tank through the one-way valve M1 and the flowmeter; the condenser water outlet pipe B1, the condenser water inlet pipe B2, the solar trough type heat collector water outlet pipe F1, the solar trough type heat collector inlet pipe F2, the water separator water outlet pipe, the water collector water inlet pipes E2-E5, the water separator water inlet pipe D1 and the water collector water outlet pipe E1 are respectively provided with flow meters;

The intelligent control unit is used for providing display pictures and real-time information of equipment operation parameters and states, various alarm processing, automatically generating history curves and reports and remotely controlling equipment switches.

The operation method of the intelligent heat supply regulation system for the large public building based on solar energy comprises the following two working modes: holiday and night modes and daytime and workday modes,

1) Holiday and night mode during daytime: because the duty room and a few rooms needing to be overtime need to be heated and reach the protection anti-freezing temperature, the heat is born by the heat collected by the solar trough collector in daytime;

after the data is processed, if the temperature difference meets the circulation requirement, an instruction is sent to the booster pump P4 and the heat collector controller to start to operate, at the moment, the solar trough type heat collector converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank, the water in the phase-change energy storage water tank is continuously and circularly heated under the pushing of the booster pump P4, and when the water tank controller monitors that the temperature difference is lower than a set value or the liquid level is higher than a high liquid level and transmits information of the temperature difference to the monitoring center database, the monitoring center database instructs the booster pump P4 and the heat collector controller to stop operating, and the solar trough type heat collector stops operating to finish the energy storage process; when the hot water level in the phase-change energy storage water tank is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped;

The overtime worker or the person on duty utilizes a fan switch to start a fan coil, a monitoring center database sends a starting instruction to a valve controller, and an electromagnetic valve Y3, a circulating water pump P2, a circulating water pump P3 and an electromagnetic valve Y4 are started; the water with heat obtained from the solar trough type heat collector enters the water separator under the pushing of the circulating water pump P2 through the electromagnetic valve Y3, hot water uniformly flows into a fan coil of a room to be heated according to the flow equipartition principle, exchanges heat with indoor cold air, and the cooled water is converged in the water collector and flows into the phase-change energy storage water tank under the pushing of the circulating water pump P3 through the electromagnetic valve Y4, and is circulated in this way to continuously supply heat to the room; when indoor personnel feel supercooled or overheated, parameters can be remotely modified independently, so that an optimal running mode and the most comfortable indoor environment state are achieved;

in the process, the on-site real-time data of inlet and outlet temperature pressure flow of the solar trough type collector, top and bottom water temperature of the phase-change energy storage water tank, water level line of the water tank, running state of the booster pump P4, valve opening of the electromagnetic valve Y3, running state of the circulating water pump P2, temperature, air quantity and pressure of the air outlet of the fan coil, temperature, air quantity and pressure of the return air inlet, running state of the circulating water pump P3, valve opening of the electromagnetic valve Y4 and the like collected by each equipment controller are transmitted to a monitoring center database, and the room monitoring computer can also extract the data of each time period to the monitoring center database for real-time monitoring;

2) Daytime working mode: because each room needs to be heated in working days, the required heat is large, and the heat obtained by the solar trough type heat collector is difficult to meet the requirement, an air source heat pump is selected to bear the load; the solar trough type heat collector is still opened to heat water in the phase-change energy storage water tank, and meanwhile, redundant heat produced by the air source heat pump is stored in the phase-change energy storage water tank for use at night;

after the data is processed, if the temperature difference meets the circulation requirement, an instruction is sent to the booster pump P4 and the heat collector controller to start to operate, at the moment, the solar trough type heat collector converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank, the water in the phase-change energy storage water tank is continuously and circularly heated under the pushing of the booster pump P4, and when the water tank controller monitors that the temperature difference is lower than a set value or the liquid level is higher than a high liquid level and transmits information of the temperature difference to the monitoring center database, the monitoring center database instructs the booster pump P4 and the heat collector controller to stop operating, and the solar trough type heat collector stops operating to finish the energy storage process; when the hot water level in the phase-change energy storage water tank is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped;

The working staff opens the fan coil by using a fan switch, the monitoring center database sends an opening instruction to the valve controller and the heat pump controller, and the electromagnetic valve Y2, the electromagnetic valve Y5, the circulating water pump P1, the circulating water pump P2 and the circulating water pump P3 are opened; the high-pressure refrigerant condensed into supercooling is throttled and depressurized by an expansion valve to form a liquid-state and gaseous-state mixed refrigerant working medium with low temperature and low pressure, the liquid-state and gaseous-state mixed refrigerant working medium with low temperature and low pressure is subjected to heat exchange with outdoor air after entering an evaporator, the liquid-state and gaseous-state mixed refrigerant working medium with low temperature and low pressure becomes a gaseous-state refrigerant with low temperature and low pressure, the gaseous-state refrigerant with high temperature and high pressure is subjected to heat exchange with medium water in a condenser by a compressor, and water after heat is obtained is divided into two paths: one path of water flows into the electromagnetic valve Y2 to enter the phase-change energy storage water tank for energy storage, while the lower-temperature water at the bottom of the phase-change energy storage water tank flows into the electromagnetic valve Y5 to enter the condenser under the pushing of the circulating water pump P1 for continuous circulating heating until the heat exchange temperature difference cannot meet the circulation, and the heat pump controller can terminate the energy storage mode of the air source heat pump; the other path of hot water enters the water separator under the pushing of the circulating water pump P2, hot water uniformly flows into fan coils of all rooms according to the flow average principle, heat exchange is carried out on the hot water and indoor cold air, the cooled water is converged in the water collector, flows into the condenser under the pushing of the circulating water pump P3, heat exchange is carried out again, and the hot water is circulated in this way, so that heat is continuously supplied to the rooms; when indoor personnel feel supercooled or overheated, parameters can be remotely modified independently, so that an optimal running mode and the most comfortable indoor environment state are achieved;

In this period, the on-site real-time data of the condenser inlet and outlet temperature pressure, the opening of the electromagnetic valve Y2, the top and bottom water temperature of the phase-change energy storage water tank, the water level line of the phase-change energy storage water tank, the running state of the circulating water pump P1, the running state of the circulating water pump P2, the temperature and air volume pressure of the air outlet of the fan coil, the temperature and air volume pressure of the return air inlet, the running state of the circulating water pump P3 and the like collected by each equipment controller are transmitted to a monitoring center database, and the room monitoring computer can also extract the data of each time period to the monitoring center database for real-time monitoring.

Compared with the prior art, the invention has the beneficial effects that:

the invention utilizes the phase-change energy storage water tank to absorb the energy from the solar trough type heat collector and the air source heat pump in the daytime for the people on duty and the overtime staff to use at night and to implement the anti-freezing protection measures on the pipeline, thereby greatly reducing the waste of energy sources, avoiding the problem of increased cost caused by the operation of the air source heat pump system and realizing the real energy conservation and environmental protection.

The system realizes parameter setting of the room temperature controller by office workers and operators on duty, and the room temperature controller controls the opening or closing of the electric two-way valve, so as to control the water temperature of the inlet and outlet of the fan coil, thereby realizing autonomous control of the heating system, regulating and controlling the system by the monitoring center database according to factors such as weather, time and the like, overcoming the defect of energy waste caused by single system operation, and enabling the system to operate efficiently and reasonably.

The sound insulation material, namely the sound insulation felt, is added in the fan coil system, and has the advantages of light weight, ultra-thin property, softness, high tensile strength, black facing, good rebound, shock absorption, heat insulation, sound insulation and the like, so that indoor personnel can be ensured to work intensively, and the working efficiency is improved.

The system has the advantages of simple structure, high operation efficiency and strong self-control, office staff can independently operate and adjust the system according to the situation, the thermal comfort of indoor staff is improved, and the system is enabled to operate efficiently and reasonably; the system has low running cost, and the phase change energy storage water tank replaces the air source heat pump system at night, so that the running cost of equipment is greatly reduced; the invention has wide application range, can be applied to villas, residential buildings and the like, and can well meet market demands.

The energy development mode is changed from extensive type to intensive type, the energy structure is changed from coal as main material to diversified type, and the energy utilization rate is further increased. However, in the conventional air source heat pump system, when the night duty and the overtime duty need to heat and prevent freezing and protecting the pipeline, the air source heat pump system needs to be operated, which greatly increases the operation cost, and the redundant heat generated by the air source heat pump is wasted because the redundant heat cannot be stored, so that the heat produced by the solar trough type heat collector in the daytime and the redundant heat generated by the air source heat pump need to be stored in the phase-change energy storage water tank for use at night, which greatly reduces the operation cost of the system, and saves energy because of the closing of the air source heat pump at night. According to the solar energy solar heat collector, the air source heat pump and the solar energy solar heat collector are combined, optimal operation is achieved through intelligent adjustment, worry and labor are saved, cost is saved, energy stored in the daytime can be used for heating at night, and the air source heat pump and the solar energy solar heat collector are not required to be started, so that cost is saved compared with the prior art.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the intelligent heat supply control system for a large public building based on solar energy.

Fig. 2 is a schematic diagram of an intelligent control unit in the present invention.

Fig. 3 is a schematic diagram of the phase change energy storage tank 3 according to the present invention.

Fig. 4 is a schematic diagram of a cross-sectional left-hand view of a fan coil 1 of the present invention.

Fig. 5 is a schematic view of the structure of the Z-Z section in fig. 4.

In the figure, a fan coil 1, a solar trough collector 2, a phase-change energy storage water tank 3, a compressor 4, an evaporator 5, an expansion valve 6, a condenser 7, a water separator 8, a water collector 9, a flowmeter 10, an intelligent control unit 11 and an air source heat pump 12; a water inlet (101, 103), a water outlet (102, 104), an outlet 107, an exhaust port 106, a temperature measuring hole 105, a drain pipe 108, a water supplementing pipe 109, a glass tube water level gauge 110, an inner container 111, a phase change material 112, a shell 113, gate valves (Z1, Z2) and a one-way valve M2; host shell 201, heat insulation material 202, host inner shell 203, fan 204, coil 205, fresh air inlet 206, return air inlet 207, air supply outlet 208, heat insulation box 209, sound insulation felt 210, heating pipe 211, rib 212, fresh air shutter 213, return air shutter 214, grille 215, filter element filter layer 216, active carbon adsorption layer 217, biological enzyme purification layer 218, and anion purification layer 219; the heat pump unit comprises pipelines (A1-A4), a condenser water outlet pipe B1, a condenser water inlet pipe B2, phase-change energy storage water tank water inlet pipes (C1 and C3), phase-change energy storage water tank water outlet pipes (C2 and C4), a solar trough type heat collector water outlet pipe F1, a solar trough type heat collector inlet pipe F2, a water separator water inlet pipe D1, water separator water outlet pipes (D2-D5), water collector water inlet pipes (E2-E5), water collector water outlet pipes E1, electric two-way valves (J1-J10) 13, three-way reversing valves (S1 and S2), electromagnetic valves (Y1-Y5), circulating water pumps (P1-P3), a booster pump P4 and a one-way valve M1.

Detailed Description

The invention is further described below with reference to examples and drawings, which are not intended to limit the scope of the claims of the present application.

The invention discloses a solar-based intelligent heating regulation and control system for a large public building, which comprises a fan coil 1, a solar trough type heat collector 2, a phase-change energy storage water tank 3, a compressor 4, an evaporator 5, an expansion valve 6, a condenser 7, a water separator 8, a water collector 9 and an intelligent control unit 11, wherein the intelligent heat supply regulation and control system is characterized in that the intelligent heat supply regulation and control system comprises a solar energy-based intelligent heat supply system;

the outlet end of one side of the condenser is connected with the expansion valve 6, and the outlet end of the other side of the condenser is connected with a region needing heating; the expansion valve 6 is connected with the compressor 4 through the evaporator 5, the outlet of the compressor is connected with the inlet of the condenser, and the compressor 4, the evaporator 5, the expansion valve 6 and the condenser 7 form an air heat source pump 12; the condenser water outlet pipe B1 positioned at the side of the heating area is connected with one end of the three-way reversing valve S1 through the electric two-way valve J1, the second end of the three-way reversing valve S1 is connected with one end of the electromagnetic valve Y1, and the third end of the three-way reversing valve S1 is connected with the phase-change energy storage water tank water inlet pipe C1; the other end of the electromagnetic valve Y1 is respectively connected with a phase-change energy storage water tank water outlet pipe C2 and a water separator water inlet pipe D1, and a circulating water pump P2 is arranged between the water separator water inlet pipe D1 and the electromagnetic valve Y1; the condenser water inlet pipe B2 positioned at one side of the expansion valve is connected with the water collector water outlet pipe E1 through an electric two-way valve J2, a flowmeter, a three-way reversing valve S2, a circulating water pump P3 and a flowmeter in sequence; the water outlet pipes D2, D3, D4 and D5 of the water separator are respectively connected with the water inlets of the corresponding fan coils 1 through electric two-way valves J3, J5, J7 and J9; the water inlet pipes E2, E3, E4 and E5 of the water collector are respectively connected with the water outlet of the fan coil 1 through electric two-way valves J4, J6, J8 and J10; the third end of the three-way reversing valve S2 is connected with a phase-change energy storage water tank water inlet pipe C3, a phase-change energy storage water tank water outlet pipe C4 is externally connected to a pipeline between the three-way reversing valve S2 and the circulating water pump P3, and the phase-change energy storage water tank water outlet pipe C4 is also provided with a circulating water pump P1; the water inlet pipes C1 and C3 of the phase-change energy storage water tank are respectively connected with two water inlets of the phase-change energy storage water tank 3 through electromagnetic valves Y2 and Y4; the water outlet pipes C2 and C4 of the phase-change energy storage water tank are respectively connected with two water outlets of the phase-change energy storage water tank 3 through electromagnetic valves Y3 and Y5; the inlet pipe F2 of the solar trough type heat collector is connected with the outlet 107 of the phase-change energy storage water tank 3 through a booster pump P4, and the outlet pipe F1 of the solar trough type heat collector is connected with the inlet of the phase-change energy storage water tank 3 through a one-way valve M1 and a flowmeter; the condenser water outlet pipe B1, the condenser water inlet pipe B2, the solar trough type heat collector water outlet pipe F1, the solar trough type heat collector inlet pipe F2, the water separator water outlet pipes D2-D5, the water collector water inlet pipes E2-E5, the water separator water inlet pipe D1 and the water collector water outlet pipe E1 are respectively provided with a flowmeter 10;

The intelligent control unit 11 is used for providing display pictures and real-time information of equipment operation parameters and states, various alarm processes, automatically generating a history curve and a report and remotely controlling equipment switches; the system can solve the problem of faults without going to the site, control the parameters of each device in real time to ensure the safe and stable operation of the system, adjust each parameter in real time according to weather conditions to meet the comfort level of office workers, achieve the optimal working state, reduce unnecessary energy waste, automatically generate a history curve according to history data, reasonably predict heat and operation modes required in the future and optimize the operation of the system; the intelligent control unit 11 (see fig. 2) includes a heat pump controller 1101, a water tank controller 1102, a heat collector controller 1103, a heat source database 1104, a valve controller 1105, a PLC controller 1106, a monitoring center database 1107, a room monitoring computer 1108, a room temperature controller 1109;

the room monitoring computer is connected with the fan coil through wireless connection, is connected with the fan coil for signal acquisition, transmits the signals to the monitoring center database, and controls the room monitoring computer in reverse after analyzing the signals; a room temperature controller 1109 is arranged in a room to be heated and is used for collecting the temperature of the corresponding room, the room temperature controller is connected with a corresponding electric two-way valve 13, the water temperature at the inlet and outlet of a corresponding fan coil is controlled by controlling the electric two-way valve, the number of the room to be heated is n, each room is provided with one fan coil, n fan coils are sequentially marked as G1, G2, … and Gn, each room is correspondingly provided with one room temperature controller, and n room temperature controllers are sequentially marked as Q1, Q2, … and Qn;

The heat pump controller 1101 is connected to the air source heat pump 12 and is used for monitoring data of the condenser, the water tank controller 1102 is connected to the phase-change energy storage water tank 3, and the heat collector controller 1103 is connected to the solar trough type heat collector 2 and is used for collecting signals; the heat pump controller 1101, the water tank controller 1102 and the heat collector controller 1103 are all connected with the heat source database 1104, each controller transmits information to the heat source database 1104, the heat source database 1104 transmits the information to the monitoring center database 1107, and the monitoring center database 1107 controls the heat source database 1104 in turn through analysis of the information; the heat source database 1104, the valve controller 1105, the room monitoring computer 1108 and the PLC controller 1106 are connected with the monitoring center database 1107 in a wireless way;

the valve controller 1105 is connected with the electromagnetic valves Y2-Y5 and the gate valves Z1-Z2 on the phase-change energy storage water tank, and the monitoring center database 1107 controls the electromagnetic valves Y2-Y5 and the gate valves Z1-Z2 through the valve controller 1105; the PLC controller 1106 is connected to the flowmeter 10, and the PLC controller 1106 transmits information acquired to the monitoring center database 1107; the monitoring center database 1107 transmits data to the room monitoring computer 1108 through the INTERNET network, and stores the data in any time in the monitoring center database 1107 so as to provide advice for more reasonable operation of each device, when the controller parameter setting of each device is found to be unreasonable, the parameters can be remotely modified independently, and the data can be read from the room database in real time as required, thereby realizing real-time monitoring of the devices.

The large heating in the present invention refers to heating of a large building comprising a plurality of rooms, each of which is installed with a fan coil 1.

The phase-change energy storage water tank 3 (see fig. 3) comprises two water inlets (101 and 103), two water outlets (102 and 104), an outlet 107, an inlet, a temperature measuring hole 105, a water drain pipe 108, a water supplementing pipe 109, an inner container 111, a phase-change material 112, a shell 113, gate valves (Z1 and Z2) and a one-way valve M2; the phase-change energy storage water tank and the solar trough type heat collector are arranged outdoors, wherein an inlet at the upper part of the phase-change energy storage water tank is connected with a water outlet pipe F1 of the solar trough type heat collector, a water inlet 101 is connected with a water inlet pipe C1 of the phase-change energy storage water tank, a water inlet 103 is connected with a water inlet pipe C3 of the phase-change energy storage water tank, a water outlet 102 is connected with a water outlet pipe C2 of the phase-change energy storage water tank, a water outlet 104 is connected with a water outlet pipe C4 of the phase-change energy storage water tank, and an outlet 107 is connected with an inlet pipe F2 of the solar trough type heat collector; the temperature measuring hole 105 is positioned on the phase-change energy storage water tank between the water outlet 102 and the water inlet 103, the phase-change energy storage water tank 3 is composed of a shell 113 and an inner container 111, phase-change material paraffin is filled between the shell and the inner container, a glass tube water level gauge 110 is arranged in the inner space of the inner container, an exhaust port 106 is arranged at the top of the phase-change energy storage water tank, the bottom of the phase-change energy storage water tank is connected with a drain pipe 108 through a gate valve Z1, a branch is led out from the upper water pipe of the gate valve Z1 to be connected with a one-way valve M2, and the one-way valve M2 is connected with a water supplementing pipe 109 through the gate valve Z2.

The fan coil 1 (see fig. 4-5) in the present invention comprises a main machine outer shell 201, a heat insulation material 202, a main machine inner shell 203, a fan 204, a coil 205, a fresh air inlet 206, a return air inlet 207, an air supply outlet 208, a heat insulation box 209, a sound insulation felt 210, a heating pipe 211, ribs 212, a fresh air louver 213, a return air louver 214, a grid 215, a filter element filter layer 216, an activated carbon adsorption layer 217, a biological enzyme purification layer 218 and a negative ion purification layer 219, and the specific structure is connected, see the prior application 201611211869.6.

The invention is further characterized in that the phase-change material in the phase-change energy storage water tank is paraffin composite phase-change material. In consideration of the cost problem, cheaper paraffin is selected as a phase-change material, nano copper oxide is also added into the phase-change material, the composite phase-change material is prepared through a magnetic stirrer and ultrasonic vibration, the heat conductivity coefficient is changed from original 0.71W/square meter to 1.07W/square meter before preparation, the latent heat value is changed from 139.37J/g to 134.8J/g, the latent heat value of the phase-change material is not greatly influenced by the nano copper oxide, and the water temperature of the phase-change energy storage water tank is set between 42 ℃ and 45 ℃ so as to meet the indoor temperature requirement. The paraffin composite phase-change material adopted by the invention has the melting point of 44 ℃ and the phase-change latent heat of 134.8J/g. The heat from the solar trough collector and the air source heat pump is absorbed in the daytime, and the temperature is lower than the melting point of the phase change material at night, so that solidification and heat release are started, the cold air in the room is heated, and the requirements of heating and protection management are met.

According to the solar trough type heat collector, the solar radiation energy is absorbed, the heat is transferred to water, the solar trough type heat collector is high in heat efficiency, a large amount of useful energy can be absorbed and stored in the phase-change energy storage water tank, and the energy utilization rate is greatly improved.

The invention is further characterized in that the fan coil is internally added with the sound insulation material sound insulation felt, thereby effectively reducing the interference of the noise in the machine to indoor personnel and greatly improving the working efficiency of the indoor personnel; in addition, in the casing, filter core filter layer, active carbon adsorption layer, biological enzyme purification layer and anion purification layer have been arranged in proper order along the air supply direction, filter core filter layer has increased filtration area, can filter and adsorb tiny particle and dust in the air effectively, active carbon adsorption layer can adsorb peculiar smell in the air and trace toxic gas such as ammonia, formaldehyde, benzene class etc. effectively, biological enzyme purification layer is the immobilized enzyme layer of making on the carrier with extracting the high enzyme of activity from good fungus body, can carry out biodegradation to multiple pollutant in the air, the oxygen molecule in the activated air of anion purification layer makes it more active and more easily absorbed by the people, promote metabolism.

The operation method of the intelligent heat supply regulation system of the large public building based on solar energy is as follows: when the weather is clear, the solar radiation quantity is sufficient in the daytime, and only an opening command is sent to the collector controller through the monitoring center database, so that the solar trough collector 2 is automatically opened. At this time, the solar trough type heat collector 2 is in an energy storage state in combination with the phase-change energy storage water tank 3, the solar trough type heat collector 2 converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank 3, the water in the phase-change energy storage water tank 3 is continuously and circularly heated under the pushing of the booster pump P4 until the temperature difference is lower than a set value or the water temperature exceeds the set temperature, and the solar trough type heat collector stops running; the monitoring center database sends an opening command to the heat pump controller and the valve controller, the air source heat pump is opened, the electromagnetic valves Y2 and Y5 are opened, the condensed supercooled high-pressure refrigerant is throttled and depressurized by the expansion valve 6 to form a low-temperature low-pressure liquid and gaseous mixed refrigerant working medium, the liquid and gaseous mixed refrigerant working medium enters the evaporator 5 and then exchanges heat with outdoor air, the low-temperature low-pressure liquid and gaseous mixed refrigerant working medium becomes a low-temperature low-pressure gaseous refrigerant, the gaseous refrigerant changing into a high-temperature high-pressure gaseous refrigerant through the compressor 4 exchanges heat with medium water in the condenser 7, and water after heat is obtained is divided into two paths: one path of water flows through the electromagnetic valve Y2 to enter the phase-change energy storage water tank 3 for energy storage, and the water at the lower temperature at the bottom of the phase-change energy storage water tank 3 flows into the electromagnetic valve Y5 to enter the condenser 7 under the pushing of the circulating water pump P1 for continuous circulating heating until the heat exchange temperature difference cannot meet the circulation, and the energy storage mode of the air source heat pump system is terminated; the other path of hot water enters the water separator 8 under the pushing of the circulating water pump P2, hot water uniformly flows into the fan coil 1 of each room according to the flow sharing principle, and exchanges heat with indoor cold air, the cooled water is converged in the water collector 9, flows into the condenser 7 under the pushing of the circulating water pump P3, exchanges heat again, and circulates in this way, and continuously supplies heat for the room; at night and on weekdays, the monitoring center database sends out signals for stopping operation to the heat pump controller and the heat collector controller, sends out signals for opening to the valve controller, and the electromagnetic valves Y3 and Y4 are opened, so that a small number of staff overtake and the staff on duty in the duty room need to open the fan coil 1, and the heat is born by the phase-change energy storage water tank 3. The water with heat obtained from the solar trough type heat collector 2 and the air source heat pump enters the water separator 8 under the pushing of the circulating water pump P2 through the electromagnetic valve Y3, hot water uniformly flows into the fan coil 1 of the room to be heated according to the flow equipartition principle, heat exchange is carried out on the hot water and indoor cold air, the cooled water is converged in the water collector 9 and flows into the phase-change energy storage water tank 3 through the electromagnetic valve Y4 under the pushing of the circulating water pump P3, and the water circulates in such a way, so that heat is continuously supplied to the room.

Realization of the intelligent control unit function:

1) Equipment data acquisition, storage and display: (1) the controllers of the equipment collect signals such as pressure, temperature, flow and the like in real time, calculate actual values through compensation, and then transmit the data to the room monitoring computer, wherein the time interval of data collection is adjustable; (2) the room monitoring computer sorts all the monitoring data and stores the monitoring data in a room database; (3) some important data such as water tank liquid level, cold and hot water temperature flow pressure are displayed in the operating mode diagram in real time, and the user of being convenient for knows the timely of unit running state.

2) And (3) controlling a unit operation switch:

(1) solar trough collector heats, phase change energy storage water tank energy storage: in the daytime, the collector controller receives an opening signal sent by the monitoring center database, opens the solar trough collector 2, operates the booster pump P4 and carries out heating treatment on water in the phase-change energy storage water tank 3; (2) the solar trough collector 2 and the air source heat pump are combined for heating, and the phase-change energy storage water tank 3 stores energy: the heat collector controller, the heat pump controller and the valve controller receive the opening signals sent by the monitoring center database, start the solar trough type heat collector 2 and the air source heat pump, operate the booster pump P4, the one-way valve M1, the electric two-way valves J1 and J2, the electromagnetic valves Y2 and Y5 and the circulating water pump P1, and heat water in the phase-change energy storage water tank 3; (3) the heat released by the air source heat pump is partially used for heating cold air in a room, and partially stored in the phase-change energy storage water tank 3: the heat pump controller and the valve controller receive the opening signals sent by the monitoring center database, an air source heat pump is opened, electric two-way valves J1 and J2, electromagnetic valves Y2 and Y5 and a circulating water pump P1 are operated to heat water in the phase-change energy storage water tank 3, and the circulating water pump P2, a water separator 8, a fan coil 1, a water collector 9, the circulating water pump P3 and the electric two-way valve J2 are operated to heat cold air of a room; (4) the phase change energy storage water tank 3 releases heat: the valve controller receives the opening signal sent by the monitoring center database, and opens the electromagnetic valve Y3, the circulating water pump P2, the water separator 8, the fan coil 1, the water collector 9, the circulating water pump P3 and the electromagnetic valve Y4; (5) the monitoring center database sends an opening signal to the valve controller according to the change of the water level in the phase-change energy storage water tank 3, and opens the gate valve Z1 or Z2 to carry out water discharge or water supplement. (6) According to room temperature of a room, a room temperature controller controls the start and stop of an electric two-way valve; and controlling an indoor fan switch according to the presence or absence of people in the room, wherein the fan switch is arranged on an indoor wall.

3) Control of the phase change energy storage water tank 3: when the temperature of the hot water in the phase-change energy storage water tank 3 is measured to be lower than the use temperature, the monitoring center database sends an opening signal to the heat collector controller after receiving the signal, the solar trough type heat collector 2 is automatically operated to heat the hot water in the phase-change energy storage water tank, and when the solar radiation amount is sufficient, the heat released by the air source heat pump is enough to meet the indoor heat requirement, and then the redundant heat is transported to the phase-change energy storage water tank 3. When the water in the phase-change energy storage water tank 3 is heated to the set temperature, the valve controller receives signals, the electromagnetic valves Y2 and Y5 are automatically closed, and the booster pump P4 stops running. When the hot water level in the phase-change energy storage water tank 3 is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped.

4) And (3) fault alarm: when the unit fails, the monitoring center database gives an alarm, and a corresponding dialogue box of the failure type and the solution is popped up on the monitoring interface to remind an operator to repair the unit in time, and meanwhile, the failure type is stored in the monitoring center database.

5) Display of various curves: the system collects the temperature, pressure and flow of each measuring point, draws the temperature, pressure and flow into a curve, and can judge whether the system is in a normal working state or in an optimal running mode according to the displayed curve.

6) The data table shows: the room monitoring computer, the heat source database and the monitoring center database provide three inquiry tables for the historical running condition of the unit, the operation condition of room personnel and the historical fault condition of the unit, so that a user can clearly know the running condition of the unit and the operation condition of the monitoring center database.

7) Editing system operation parameters: the room personnel can modify or reset the system operating parameters according to the comfort level and the external environment characteristics so as to adapt to the requirements of prediction and optimization.

The operation method of the intelligent heat supply regulation system for the large public building based on solar energy mainly comprises two working modes: holiday and night modes and daytime and workday modes. These two modes of operation are described in detail below.

1) Holiday and night mode during daytime: because the duty room and a few rooms needing to be overtime need to be heated and reach the protection anti-freezing temperature, the heat is born by the heat collected by the solar trough collector in the daytime.

After the data is processed, if the temperature difference meets the circulation requirement, an instruction is sent to the booster pump P4 and the heat collector controller to start operation, at this time, the solar trough type heat collector 2 converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank, the water in the phase-change energy storage water tank 3 is continuously and circularly heated under the pushing of the booster pump P4, and when the water tank controller monitors that the temperature difference is lower than a set value or the liquid level is higher than a high liquid level and transmits information of the temperature difference to the monitoring center database, the monitoring center database instructs the booster pump P4 and the heat collector controller to stop operation, and the solar trough type heat collector 2 stops operation and the energy storage process is finished. When the hot water level in the phase-change energy storage water tank 3 is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped.

The overtime worker or the person on duty utilizes the fan switch to open the fan coil, and the monitoring center database sends an instruction of opening to the valve controller, and the solenoid valve Y3, the circulating water pump P2, the circulating water pump P3 and the solenoid valve Y4 are opened. The water with heat obtained from the solar trough type heat collector 2 enters the water separator 8 under the pushing of the circulating water pump P2 through the electromagnetic valve Y3, hot water uniformly flows into the fan coil 1 of a room to be heated according to the flow equipartition principle, heat exchange is carried out on the hot water and indoor cold air, the cooled water is converged in the water collector 9 and flows into the phase-change energy storage water tank 3 through the electromagnetic valve Y4 under the pushing of the circulating water pump P3, and the water is circulated in such a way to continuously supply heat for the room. When the indoor personnel feel supercooled or overheated, the parameters can be remotely modified independently, so that the optimal running mode and the most comfortable indoor environment state are achieved.

In the period, the temperature and pressure flow of the inlet and outlet of the solar trough type heat collector 2, the water temperature at the top and bottom of the phase-change energy storage water tank 3, the water tank water line, the running state of the booster pump P4, the opening degree of the valve of the electromagnetic valve Y3, the running state of the circulating water pump P2, the temperature and air quantity and pressure of the air outlet of the fan coil 1, the temperature and air quantity and pressure of the air return inlet, the running state of the circulating water pump P3, the opening degree of the valve of the electromagnetic valve Y4 and other field real-time data are collected by each equipment controller are transmitted to a monitoring center database, and the room monitoring computer can also extract the data of each time period to the monitoring center database for real-time monitoring.

2) Day working day: since each room needs to be heated in a working day, the required heat is large, and the heat obtained by the solar trough collector 2 is difficult to meet the requirement, the air source heat pump is selected to bear the load. The solar trough collector 2 is still opened to heat the water in the phase-change energy storage water tank, and meanwhile, the redundant heat produced by the air source heat pump is also stored in the phase-change energy storage water tank 3 for night use.

After the data is processed, if the temperature difference meets the circulation requirement, an instruction is sent to the booster pump P4 and the heat collector controller to start operation, at this time, the solar trough type heat collector 2 converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank 3, the water in the phase-change energy storage water tank 3 is continuously and circularly heated under the pushing of the booster pump P4, and when the water tank controller monitors that the temperature difference is lower than a set value or the liquid level is higher than a high liquid level and transmits information of the temperature difference to the monitoring center database, the monitoring center database instructs the booster pump P4 and the heat collector controller to stop operation, and the solar trough type heat collector 2 stops operation and the energy storage process is finished. When the hot water level in the phase-change energy storage water tank 3 is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped.

The working staff opens the fan coil by using the fan switch, and the monitoring center database sends an opening instruction to the valve controller and the heat pump controller, and the electromagnetic valve Y2, the electromagnetic valve Y5, the circulating water pump P1, the circulating water pump P2 and the circulating water pump P3 are opened. The high-pressure refrigerant condensed into supercooling is throttled and depressurized into liquid and gaseous mixed refrigerant working medium with low temperature and low pressure through an expansion valve 6, and enters an evaporator 5 to exchange heat with outdoor air, the liquid and gaseous mixed refrigerant working medium with low temperature and low pressure becomes gaseous refrigerant with low temperature and low pressure, the gaseous refrigerant with high temperature and high pressure is changed into gaseous refrigerant with high pressure through a compressor 4 to exchange heat with medium water in a condenser 7, and the water after obtaining heat is divided into two paths: one path of water flows into the electromagnetic valve Y2 to enter the phase-change energy storage water tank 3 for energy storage, while the lower-temperature water at the bottom of the phase-change energy storage water tank 3 flows into the electromagnetic valve Y5 to enter the condenser 7 under the pushing of the circulating water pump P1 for continuous circulating heating until the heat exchange temperature difference cannot meet the circulation, and the heat pump controller can terminate the energy storage mode of the air source heat pump; the other path enters the water separator 8 under the pushing of the circulating water pump P2, hot water uniformly flows into the fan coil 1 of each room according to the flow average principle, heat exchange is carried out with indoor cold air, the cooled water is converged in the water collector 9, flows into the condenser 7 under the pushing of the circulating water pump P3, heat exchange is carried out again, and the heat is continuously supplied to the room by circulation. When the indoor personnel feel supercooled or overheated, the parameters can be remotely modified independently, so that the optimal running mode and the most comfortable indoor environment state are achieved.

In this period, the real-time data of the condenser 7 inlet and outlet temperature pressure, the opening of the electromagnetic valve Y2, the water temperature at the top and bottom of the phase-change energy storage water tank 3, the water level line of the phase-change energy storage water tank 3, the running state of the circulating water pump P1, the running state of the circulating water pump P2, the temperature, the air quantity and the pressure of the air outlet of the fan coil 1, the temperature, the air quantity and the pressure of the air return inlet, the running state of the circulating water pump P3 and the like collected by each equipment controller are transmitted to a monitoring center database, and the room monitoring computer can also extract the data of each time period to the monitoring center database for real-time monitoring.

The monitoring center database can be used for transmitting data in any time to the room monitoring computer through the Internet network, and the data are stored in the monitoring center database so as to provide suggestions for more reasonable operation of each device, when the fact that the parameter setting of the controller of each device is unreasonable is found, the parameter can be remotely modified independently, the data can be read from the room database in real time according to the requirement, and therefore real-time monitoring of the device is achieved.

When the unit fails, the monitoring center database gives an alarm, and a corresponding dialogue box of the failure type and the solution is popped up on the monitoring interface to remind an operator to repair the unit in time, and meanwhile, the failure type is stored in the monitoring center database.

The invention is applicable to the prior art where nothing is involved.

Claims (4)

1. A solar-based intelligent heating regulation and control system for a large public building is characterized by comprising a fan coil, a solar trough type heat collector, a phase-change energy storage water tank, a compressor, an evaporator, an expansion valve, a condenser, a water separator, a water collector and an intelligent control unit;

the outlet end of one side of the condenser is connected with the expansion valve, and the outlet end of the other side of the condenser is connected with a heating area; the expansion valve is connected with the compressor through the evaporator, the outlet of the compressor is connected with the inlet of the condenser, and the compressor, the evaporator, the expansion valve and the condenser form an air heat source pump; the condenser water outlet pipe B1 positioned at the side of the heating area is connected with one end of the three-way reversing valve S1 through the electric two-way valve J1, the second end of the three-way reversing valve S1 is connected with one end of the electromagnetic valve Y1, and the third end of the three-way reversing valve S1 is connected with the phase-change energy storage water tank water inlet pipe C1; the other end of the electromagnetic valve Y1 is respectively connected with a phase-change energy storage water tank water outlet pipe C2 and a water separator water inlet pipe D1, and a circulating water pump P2 is arranged between the water separator water inlet pipe D1 and the electromagnetic valve Y1; the condenser water inlet pipe B2 positioned at one side of the expansion valve is connected with the water collector water outlet pipe E1 through an electric two-way valve J2, a flowmeter, a three-way reversing valve S2, a circulating water pump P3 and a flowmeter in sequence; the water outlet pipe of the water separator is connected with the water inlet of the corresponding fan coil through the corresponding electric two-way valve respectively; the water inlet pipe of the water collector is connected with the water outlet of the corresponding fan coil through the corresponding electric two-way valve respectively; the third end of the three-way reversing valve S2 is connected with a phase-change energy storage water tank water inlet pipe C3, a phase-change energy storage water tank water outlet pipe C4 is externally connected to a pipeline between the three-way reversing valve S2 and the circulating water pump P3, and the phase-change energy storage water tank water outlet pipe C4 is also provided with a circulating water pump P1; the water inlet pipes C1 and C3 of the phase-change energy storage water tank are respectively connected with two water inlets of the phase-change energy storage water tank through electromagnetic valves Y2 and Y4; the water outlet pipes C2 and C4 of the phase-change energy storage water tank are respectively connected with two water outlets of the phase-change energy storage water tank through electromagnetic valves Y3 and Y5; the inlet pipe F2 of the solar trough type heat collector is connected with the outlet of the phase-change energy storage water tank through the booster pump P4, and the outlet pipe F1 of the solar trough type heat collector is connected with the inlet of the phase-change energy storage water tank through the one-way valve M1 and the flowmeter; the condenser water outlet pipe B1, the condenser water inlet pipe B2, the solar trough type heat collector water outlet pipe F1, the solar trough type heat collector inlet pipe F2, the water separator water outlet pipe, the water collector water inlet pipes E2-E5, the water separator water inlet pipe D1 and the water collector water outlet pipe E1 are respectively provided with flow meters;

The intelligent control unit is used for providing display pictures and real-time information of equipment operation parameters and states, various alarm processes, automatically generating a history curve and a report, and remotely controlling an equipment switch;

the phase-change energy storage water tank comprises two water inlets (101 and 103), two water outlets (102 and 104), an outlet, an inlet, a temperature measuring hole, a drain pipe, a water supplementing pipe, an inner container, phase-change materials, a shell, a gate valve (Z1 and Z2) and a one-way valve M2; the temperature measuring hole is positioned on the phase-change energy storage water tank between the water outlet (102) and the water inlet (103), the phase-change energy storage water tank is composed of a shell and an inner container, a phase-change material is filled between the shell and the inner container, a glass tube water level gauge is arranged in the inner space of the inner container, an exhaust port is arranged at the top of the phase-change energy storage water tank, the bottom of the phase-change energy storage water tank is connected with a water drain pipe through a gate valve Z1, a branch is led out from the upper water pipe of the gate valve Z1 to be connected with a one-way valve M2, and the one-way valve M2 is connected with a water supplementing pipe through the gate valve Z2;

the intelligent control unit comprises a heat pump controller, a water tank controller, a heat collector controller, a heat source database, a valve controller, a PLC controller, a monitoring center database, a room monitoring computer and a room temperature controller;

The room monitoring computer is connected with the fan coil through wireless connection, is connected with the fan coil for signal acquisition, transmits the signals to the monitoring center database, and controls the room monitoring computer in reverse after analyzing the signals; a room temperature controller is arranged in a room to be heated, the room temperature controller is connected with a corresponding electric two-way valve, the water temperature at the inlet and outlet of a corresponding fan coil is controlled by controlling the electric two-way valve, the number of the room to be heated is n, each room is provided with one fan coil, and each room is provided with one room temperature controller;

the heat pump controller is connected with the air source heat pump and is used for monitoring data of the condenser, the water tank controller is connected with the phase-change energy storage water tank, and the heat collector controller is connected with the solar trough type heat collector; the heat pump controller, the water tank controller and the heat collector controller are all connected with the heat source database, and the heat source database, the valve controller, the room monitoring computer and the PLC are in wireless connection with the monitoring center database;

The valve controller is connected with the electromagnetic valves Y2-Y5 and the gate valves Z1-Z2 on the phase-change energy storage water tank, and the monitoring center database controls the electromagnetic valves Y2-Y5 and the gate valves Z1-Z2 through the valve controller; the PLC is connected with the flowmeter; the monitoring center database is transmitted to the room monitoring computer through the Internet network to acquire data in any time, the data are stored in the monitoring center database, the monitoring center database can provide suggestions for reasonable operation of each device, when the fact that the parameter setting of the controller of each device is unreasonable is found, the parameter can be remotely modified independently, the data are read from the room database in real time according to the requirement, and therefore real-time monitoring of the device is achieved.

2. The intelligent heat supply regulation and control system for the large public building based on solar energy, which is characterized in that the phase-change material in the phase-change energy storage water tank is paraffin composite phase-change material, the melting point is 44 ℃, and the phase-change latent heat is 134.8J/g.

3. The intelligent heat supply regulation and control system for the large public building based on solar energy is characterized in that the fan coil comprises a main machine outer shell, a heat insulation material, a main machine inner shell, a fan, a coil, a fresh air inlet, a return air inlet, an air supply inlet, an insulating box body, a sound insulation felt, a heating pipe, ribs, fresh air shutters, return air shutters, a grid, a filter element filter layer, an activated carbon adsorption layer, a biological enzyme purification layer and a negative ion purification layer.

4. A method of operating a solar-based intelligent heating control system for large public buildings as defined in claim 1, the method having two modes of operation: holiday and night modes and daytime and workday modes,

1) Holiday and night mode during daytime: because the duty room and a few rooms needing to be overtime need to be heated and reach the protection anti-freezing temperature, the heat is born by the heat collected by the solar trough collector in daytime;

after the data is processed, if the temperature difference meets the circulation requirement, an instruction is sent to the booster pump P4 and the heat collector controller to start to operate, at the moment, the solar trough type heat collector converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank, the water in the phase-change energy storage water tank is continuously and circularly heated under the pushing of the booster pump P4, and when the water tank controller monitors that the temperature difference is lower than a set value or the liquid level is higher than a high liquid level and transmits information of the temperature difference to the monitoring center database, the monitoring center database instructs the booster pump P4 and the heat collector controller to stop operating, and the solar trough type heat collector stops operating to finish the energy storage process; when the hot water level in the phase-change energy storage water tank is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped;

The overtime worker or the person on duty utilizes a fan switch to start a fan coil, a monitoring center database sends a starting instruction to a valve controller, and an electromagnetic valve Y3, a circulating water pump P2, a circulating water pump P3 and an electromagnetic valve Y4 are started; the water with heat obtained from the solar trough type heat collector enters the water separator under the pushing of the circulating water pump P2 through the electromagnetic valve Y3, hot water uniformly flows into a fan coil of a room to be heated according to the flow equipartition principle, exchanges heat with indoor cold air, and the cooled water is converged in the water collector and flows into the phase-change energy storage water tank under the pushing of the circulating water pump P3 through the electromagnetic valve Y4, and is circulated in this way to continuously supply heat to the room; when indoor personnel feel supercooled or overheated, parameters can be remotely modified independently, so that an optimal running mode and the most comfortable indoor environment state are achieved;

in the process, the on-site real-time data of inlet and outlet temperature pressure flow of the solar trough type collector, top and bottom water temperature of the phase-change energy storage water tank, water level line of the water tank, running state of the booster pump P4, valve opening of the electromagnetic valve Y3, running state of the circulating water pump P2, temperature, air quantity and pressure of the air outlet of the fan coil, temperature, air quantity and pressure of the return air inlet, running state of the circulating water pump P3, valve opening of the electromagnetic valve Y4 and the like collected by each equipment controller are transmitted to a monitoring center database, and the room monitoring computer can also extract the data of each time period to the monitoring center database for real-time monitoring;

2) Daytime working mode: because each room needs to be heated in working days, the required heat is large, and the heat obtained by the solar trough type heat collector is difficult to meet the requirement, an air source heat pump is selected to bear the load; the solar trough type heat collector is still opened to heat water in the phase-change energy storage water tank, and meanwhile, redundant heat produced by the air source heat pump is stored in the phase-change energy storage water tank for use at night;

after the data is processed, if the temperature difference meets the circulation requirement, an instruction is sent to the booster pump P4 and the heat collector controller to start to operate, at the moment, the solar trough type heat collector converts sunlight irradiated on the surface of the solar trough type heat collector into heat energy to heat water from the phase-change energy storage water tank, the water in the phase-change energy storage water tank is continuously and circularly heated under the pushing of the booster pump P4, and when the water tank controller monitors that the temperature difference is lower than a set value or the liquid level is higher than a high liquid level and transmits information of the temperature difference to the monitoring center database, the monitoring center database instructs the booster pump P4 and the heat collector controller to stop operating, and the solar trough type heat collector stops operating to finish the energy storage process; when the hot water level in the phase-change energy storage water tank is lower than the low level and the hot water temperature is higher than the use temperature, the valve controller opens the gate valve Z2 and the one-way valve M2 to supplement water, and when the hot water level in the phase-change energy storage water tank reaches the high level or the hot water temperature in the phase-change energy storage water tank is lower than the use temperature, the gate valve Z2 is closed, and then the water supplement is stopped;

The working staff opens the fan coil by using a fan switch, the monitoring center database sends an opening instruction to the valve controller and the heat pump controller, and the electromagnetic valve Y2, the electromagnetic valve Y5, the circulating water pump P1, the circulating water pump P2 and the circulating water pump P3 are opened; the high-pressure refrigerant condensed into supercooling is throttled and depressurized by an expansion valve to form a liquid-state and gaseous-state mixed refrigerant working medium with low temperature and low pressure, the liquid-state and gaseous-state mixed refrigerant working medium with low temperature and low pressure is subjected to heat exchange with outdoor air after entering an evaporator, the liquid-state and gaseous-state mixed refrigerant working medium with low temperature and low pressure becomes a gaseous-state refrigerant with low temperature and low pressure, the gaseous-state refrigerant with high temperature and high pressure is subjected to heat exchange with medium water in a condenser by a compressor, and water after heat is obtained is divided into two paths: one path of water flows into the electromagnetic valve Y2 to enter the phase-change energy storage water tank for energy storage, while the lower-temperature water at the bottom of the phase-change energy storage water tank flows into the electromagnetic valve Y5 to enter the condenser under the pushing of the circulating water pump P1 for continuous circulating heating until the heat exchange temperature difference cannot meet the circulation, and the heat pump controller can terminate the energy storage mode of the air source heat pump; the other path of hot water enters the water separator under the pushing of the circulating water pump P2, hot water uniformly flows into fan coils of all rooms according to the flow average principle, heat exchange is carried out on the hot water and indoor cold air, the cooled water is converged in the water collector, flows into the condenser under the pushing of the circulating water pump P3, heat exchange is carried out again, and the hot water is circulated in this way, so that heat is continuously supplied to the rooms; when indoor personnel feel supercooled or overheated, parameters can be remotely modified independently, so that an optimal running mode and the most comfortable indoor environment state are achieved;

In this period, the on-site real-time data of the condenser inlet and outlet temperature pressure, the opening of the electromagnetic valve Y2, the top and bottom water temperature of the phase-change energy storage water tank, the water level line of the phase-change energy storage water tank, the running state of the circulating water pump P1, the running state of the circulating water pump P2, the temperature and air volume pressure of the air outlet of the fan coil, the temperature and air volume pressure of the return air inlet, the running state of the circulating water pump P3 and the like collected by each equipment controller are transmitted to a monitoring center database, and the room monitoring computer can also extract the data of each time period to the monitoring center database for real-time monitoring.

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