CN108278653B - Smart heating control system for large public buildings based on solar energy - Google Patents

Abstract

The invention relates to a large-scale public building intelligent heating control system based on solar energy. The system includes a fan coil unit, a solar trough collector, a phase change energy storage water tank, a compressor, an evaporator, an expansion valve, a condenser, and a water separator. , water collector and intelligent control unit. The system of the present invention is simple in structure, efficient in operation, and strong in self-control. Office personnel can operate and adjust the system independently according to the situation, improve the thermal comfort of indoor personnel, and make the system operate efficiently and reasonably. The energy water tank replaces the air source heat pump system, which greatly reduces the operating cost of the equipment; the application range is wide, and the invention can also be applied to villas, residential buildings, etc., and can well meet the market demand.

Description

Smart heating control system for large public buildings based on solar energy

technical field

The invention relates to the technical fields of building energy saving, renewable energy utilization and intelligent control, in particular to a solar energy-based intelligent heating control system for large public buildings and an operating method thereof.

Background technique

As the material basis for the survival and development of human society, energy is closely related to the development of human economy and society and the improvement of living standards. Moreover, energy shortage has become one of the biggest problems faced by human beings, and environmental problems such as climate warming and pollution brought about by energy problems have become important factors restricting economic development. The development of new energy sources and the implementation of various energy-saving measures are important ways to solve energy problems. At present, China's heating is mainly composed of heat sources, heat networks, and heat users. There is no intelligent system to automatically control them, and manual operation management, maintenance, and maintenance are required. Although the combined heating system of air source heat pumps and solar collectors is itself It is an efficient and energy-saving system, but due to uncertain factors such as weather, time, indoor personnel's satisfaction with the temperature and lack of a good operation control strategy, there is a large discrepancy between the required heat supply and the actual heat supply, resulting in energy Waste and unit operating costs increase, so a large-scale heating intelligent control system is needed to replace traditional manual control to solve the problems of personnel dissatisfaction with comfort, energy waste and cost increase, so that the system can operate efficiently and reasonably.

The mode of energy development needs to change from extensive to intensive, the energy structure changes from coal-based to diversified, and the energy utilization rate needs to be further increased. However, in the traditional air source heat pump system, when night duty personnel and overtime workers need heating and antifreeze protection for pipelines, they all need to run the air source heat pump system, which will greatly increase the operating cost, and the excess energy generated by the air source heat pump The heat will be wasted as it cannot be stored.

To sum up, it is particularly important to design a large-scale heating system that can operate efficiently and reasonably, and can reduce system operating costs and energy waste.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a solar energy-based smart heating control system for large public buildings and an operating method thereof. The system realizes the remote control of the heating system by office workers and personnel on duty, and the control center regulates the system according to factors such as weather and time, which overcomes the defect of energy waste caused by the simplification of system operation. The energy storage water tank stores the heat from the solar trough collector and the air source heat pump for night use, which avoids the problem of cost increase caused by the operation of the air source heat pump system, and makes the system operate efficiently and reasonably.

The technical solution of the present invention to solve the technical problem is to provide a solar energy-based intelligent heating control system for large public buildings, which is characterized in that the system includes a fan coil unit, a solar trough collector, a phase change energy storage water tank, Compressor, evaporator, expansion valve, condenser, water separator, water collector and intelligent control unit;

The outlet end on one side of the condenser is connected to the expansion valve, and the outlet end on the other side is connected to the heating area; the expansion valve is connected to the compressor through the evaporator, and the outlet of the compressor is connected to the inlet of the condenser. The above-mentioned compressor, evaporator, expansion valve, and condenser constitute an air heat source pump; the outlet pipe B1 of the condenser located on the side of the heating area is connected to one end of the three-way reversing valve S1 through the electric two-way valve J1, and the three-way reversing The second end of the valve S1 is connected to one end of the solenoid valve Y1, the third end of the three-way reversing valve S1 is connected to the water inlet pipe C1 of the phase change energy storage tank; the other end of the solenoid valve Y1 is respectively connected to the outlet pipes C2, The water separator inlet pipe D1 is provided with a circulating water pump P2 between the water separator inlet pipe D1 and the solenoid valve Y1; the condenser water inlet pipe B2 on the side of the expansion valve passes through the electric two-way valve J2, flow meter, three The reversing valve S2, the circulating water pump P3, and the flow meter are connected to the outlet pipe E1 of the water collector; the outlet pipes of the water separator are respectively connected to the water inlet of the corresponding fan coil through the corresponding electric two-way valve; the water inlet pipe of the water collector They are respectively connected to the water outlets of the corresponding fan coil units through the corresponding electric two-way valves; the third end of the three-way reversing valve S2 is connected to the water inlet pipe C3 of the phase change energy storage tank, and the three-way reversing valve S2 and the circulating water pump The outlet pipe C4 of the phase change energy storage tank is externally connected to the pipeline between P3, and a circulating water pump P1 is also provided on the outlet pipe C4 of the phase change energy storage tank; Y4 is connected to the two water inlets of the phase-change energy storage tank; the outlet pipes C2 and C4 of the phase-change energy storage tank are respectively connected to the two outlets of the phase-change energy storage tank through solenoid valves Y3 and Y5; the inlet pipe of the solar trough collector F2 is connected to the outlet of the phase-change energy storage tank through the booster pump P4, and the outlet pipe F1 of the solar trough collector is connected to the inlet of the phase-change energy storage tank through the one-way valve M1 and the flow meter; and the outlet pipe B1 of the condenser , condenser water inlet pipe B2, solar trough collector outlet pipe F1, solar trough collector inlet pipe F2, water separator outlet pipe, water collector inlet pipe E2～E5, water separator inlet pipe D1, collector Flowmeters are respectively installed on the water outlet pipe E1 of the water device;

The intelligent control unit is used to provide display screens and real-time information of equipment operating parameters and status, various alarm processing, automatic generation of historical curves and reports, and remote control of equipment switches.

The operation method of the above-mentioned large-scale public building intelligent heating control system based on solar energy has two working modes: daytime holiday and night mode and daytime working day mode,

1) Daytime holiday and night mode: Since the duty room and a few rooms that need to work overtime need to be heated and reach the protection antifreeze temperature, this part of the heat is borne by the heat collected by the solar trough collector during the day;

The temperature data collected by the water tank controller is fed back to the monitoring center database. After the data is processed, if the temperature difference meets the cycle requirements, an instruction is sent to the booster pump P4 and the collector controller to start running. At this time, the solar trough collector Convert the sunlight irradiated on its surface into heat energy to heat the water from the phase change energy storage tank. The water in the phase change energy storage tank is continuously heated by the booster pump P4. When the water tank controller monitors the temperature difference When it is lower than the set value or the liquid level is higher than the high liquid level and transmits its information to the monitoring center database, the monitoring center database will instruct the booster pump P4 and the collector controller to stop running, and the solar trough collector will stop running , the energy storage process ends; when the measured hot water level in the phase change energy storage tank is lower than the low level and the hot water temperature is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high liquid level is reached or the temperature of the hot water in the phase-change energy storage tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped;

Overtime workers or personnel on duty use the fan switch to turn on the fan coil, and the monitoring center database sends an opening command to the valve controller, and the solenoid valve Y3, circulating water pump P2, circulating water pump P3, and solenoid valve Y4 are turned on; obtained from the solar trough collector The hot water enters the water separator through the electromagnetic valve Y3 and is driven by the circulating water pump P2. According to the principle of equal flow, the hot water flows evenly into the fan coil in the room to be heated, and exchanges heat with the cold air in the room to cool the air. The final water converges in the water collector and flows into the phase change energy storage water tank through the solenoid valve Y4 under the promotion of the circulating water pump P3. This cycle continues to provide heat for the room; when the indoor personnel feel too cold or overheated, they can independently Parameters can be modified remotely to achieve the optimal operating mode and the most comfortable indoor environment;

During this period, the temperature, pressure and flow of the inlet and outlet of the solar trough collector collected by each equipment controller, the water temperature at the top and bottom of the phase change energy storage tank, the water level line of the water tank, the operating status of the booster pump P4, and the valve opening of the solenoid valve Y3 , circulating water pump P2 operating status, fan coil unit air outlet temperature and air volume pressure, return air outlet temperature and air volume pressure, circulating water pump P3 operating status, solenoid valve Y4 valve opening and other on-site real-time data will be transmitted to the monitoring center database, and the room monitoring computer will also The data of each time period can be extracted from the monitoring center database for real-time monitoring;

2) Daytime working day mode: Since all rooms need to be heated on working days, the heat required is relatively large, and the heat obtained by the solar trough collector is difficult to meet the demand, so the air source heat pump is selected to bear this part of the load; and the solar trough The heat collector is still turned on to heat the water in the phase change energy storage tank, and the excess heat produced by the air source heat pump will also be stored in the phase change energy storage tank for night use;

The temperature data collected by the water tank controller is fed back to the monitoring center database. After the data is processed, if the temperature difference meets the cycle requirements, an instruction is sent to the booster pump P4 and the collector controller to start running. At this time, the solar trough collector Convert the sunlight irradiated on its surface into heat energy to heat the water from the phase change energy storage tank. The water in the phase change energy storage tank is continuously heated by the booster pump P4. When the water tank controller monitors the temperature difference When it is lower than the set value or the liquid level is higher than the high liquid level and transmits its information to the monitoring center database, the monitoring center database will instruct the booster pump P4 and the collector controller to stop running, and the solar trough collector will stop running , the energy storage process ends; when the measured hot water level in the phase change energy storage tank is lower than the low level and the hot water temperature is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high liquid level is reached or the temperature of the hot water in the phase-change energy storage tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped;

Workers use the fan switch to turn on the fan coil, and the monitoring center database sends an opening command to the valve controller and the heat pump controller, and the solenoid valve Y2, solenoid valve Y5, circulating water pump P1, circulating water pump P2, and circulating water pump P3 are turned on; The cold high-pressure refrigerant is throttled and depressurized by the expansion valve to become a low-temperature and low-pressure liquid and gaseous mixed refrigerant. After entering the evaporator, it exchanges heat with the outdoor air. The gaseous refrigerant is transformed into a high-temperature and high-pressure gaseous refrigerant through the compressor and exchanges heat with the medium water in the condenser. The water after gaining heat is divided into two paths: one path flows into the solenoid valve Y2 and enters the phase change energy storage tank for energy storage, while the lower temperature water at the bottom of the phase-change energy storage tank flows into the solenoid valve Y5 and enters the condenser under the push of the circulating water pump P1 to continue circulating and heating until the heat exchange temperature difference cannot meet the circulation, the heat pump controller will make the air source heat pump storage The energy mode is terminated; the other channel is driven by the circulating water pump P2 and enters the water distributor. According to the principle of equal flow distribution, hot water flows into the fan coils in each room evenly, and exchanges heat with the cold air in the room. The confluence in the water collector flows into the condenser under the impetus of the circulating water pump P3 for heat exchange again. This cycle continuously supplies heat to the room; when the indoor personnel feel too cold or overheated, they can independently modify the parameters remotely to achieve the best Optimal operating mode and the most comfortable indoor environment;

During this period, the temperature and pressure of the inlet and outlet of the condenser collected by each equipment controller, the opening of the solenoid valve Y2, the water temperature at the top and bottom of the phase change energy storage tank, the water level line of the phase change energy storage tank, the operating status of the circulating water pump P1, the circulating water pump On-site real-time data such as the operating status of P2, the temperature and air volume pressure of the fan coil outlet, the temperature and air volume pressure of the return air outlet, and the operating status of circulating water pump P3 will be transmitted to the monitoring center database, and the room monitoring computer can also extract various time periods from the monitoring center database data for real-time monitoring.

Compared with prior art, the beneficial effect of the present invention is:

The invention utilizes the phase change energy storage water tank to absorb the energy from the solar trough collector and the air source heat pump in the daytime for use by the on-duty personnel and overtime workers at night and to implement antifreeze protection measures for the pipelines, which greatly reduces the waste of energy , avoiding the problem of cost increase caused by running the air source heat pump system, and realizing real energy saving and environmental protection.

The system realizes the parameter setting of the room thermostat by office workers and personnel on duty. The room thermostat controls the opening or closing of the electric two-way valve, and then controls the water temperature at the inlet and outlet of the fan coil unit, so that the heating system can be adjusted. The independent control of the monitoring center database regulates the system according to factors such as weather and time, which overcomes the defect of energy waste caused by the simplification of system operation, and makes the system run efficiently and reasonably.

In the fan coil system of the present invention, a sound-insulating material——sound-insulating felt is added. This material is light, ultra-thin, soft, and has high tensile strength. Acoustic and other performance, can ensure that indoor personnel concentrate on work, improve work efficiency.

The system of the present invention is simple in structure, efficient in operation, and strong in self-control. Office personnel can independently operate and adjust the system according to the situation, improve the thermal comfort of indoor personnel, and make the system operate efficiently and reasonably; The energy water tank replaces the air source heat pump system, which greatly reduces the operating cost of the equipment; the application range is wide, and the invention can also be applied to villas, residential buildings, etc., and can well meet the market demand.

The mode of energy development needs to change from extensive to intensive, the energy structure changes from coal-based to diversified, and the energy utilization rate needs to be further increased. However, in the traditional air source heat pump system, when night duty personnel and overtime workers need heating and antifreeze protection for pipelines, they all need to run the air source heat pump system, which will greatly increase the operating cost, and the excess energy generated by the air source heat pump The heat will be wasted because it cannot be stored, so it is necessary to store the heat produced by the solar trough collector during the day and the excess heat generated by the air source heat pump in the phase change energy storage tank for use at night, which greatly reduces the system cost. Operating costs, and energy savings due to the shutdown of the air source heat pump at night. This application combines the air source heat pump with the solar trough collector to achieve optimal operation through intelligent adjustment, save worry, save labor, and save costs. At night, the energy stored during the day can be used for heating without turning on the air source heat pump and Solar trough collectors, which are more cost-effective than existing technologies.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the smart heating control system for large public buildings based on solar energy according to the present invention.

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

Fig. 3 is a schematic structural view of the phase change energy storage water tank 3 in the present invention.

Fig. 4 is a schematic cross-sectional structure diagram of the fan coil unit 1 in the present invention as viewed from the left.

Fig. 5 is a structural schematic diagram of the Z-Z section in Fig. 4 .

In the figure, fan coil unit 1, solar trough collector 2, phase change energy storage water tank 3, compressor 4, evaporator 5, expansion valve 6, condenser 7, water separator 8, water collector 9, flow Meter 10, intelligent control unit 11, air source heat pump 12; water inlet (101, 103), water outlet (102, 104), outlet 107, exhaust port 106, temperature measuring hole 105, drain pipe 108, water supply pipe 109, Glass tube water level gauge 110, liner 111, phase change material 112, casing 113, gate valves (Z1, Z2), check valve M2; main engine casing 201, thermal insulation material 202, main engine inner casing 203, fan 204, coil 205, Fresh air outlet 206, return air outlet 207, air supply outlet 208, heat insulation box 209, sound insulation blanket 210, heating pipe 211, fins 212, fresh air louvers 213, return air louvers 214, grille 215, filter element filter layer 216, activated carbon adsorption layer 217. Biological enzyme purification layer 218, negative ion purification layer 219; pipelines (A1-A4) in the heat pump unit, condenser outlet pipe B1, condenser water inlet pipe B2, phase change energy storage water tank inlet pipes (C1, C3), Outlet pipe of phase change energy storage tank (C2, C4), outlet pipe of solar trough collector F1, inlet pipe of solar trough collector F2, water separator inlet pipe D1, water separator outlet pipe (D2～D5) , water collector inlet pipe (E2～E5), water collector outlet pipe E1, electric two-way valve (J1～J10)13, three-way reversing valve (S1, S2), solenoid valve (Y1～Y5), circulation Water pump (P1～P3), booster pump P4, one-way valve M1.

Detailed ways

The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but it is not used as a limitation to the protection scope of the claims of the present application.

The solar energy-based intelligent heating control system for large public buildings (see Figures 1-5) of the present invention includes a fan coil unit 1, a solar trough collector 2, a phase change energy storage water tank 3, a compressor 4, an evaporator 5, an expansion Valve 6, condenser 7, water separator 8, water collector 9 and intelligent control unit 11;

The outlet end on one side of the condenser is connected to the expansion valve 6, and the outlet end on the other side is connected to the heating area; the expansion valve 6 is connected to the compressor 4 through the evaporator 5, and the outlet of the compressor is connected to the condenser The above-mentioned compressor 4, evaporator 5, expansion valve 6, and condenser 7 form an air heat source pump 12; the condenser outlet pipe B1 on the side of the heating area is connected to the three-way reversing through the electric two-way valve J1 One end of the valve S1, the second end of the three-way reversing valve S1 is connected to one end of the solenoid valve Y1, the third end of the three-way reversing valve S1 is connected to the inlet pipe C1 of the phase change energy storage tank; the other end of the solenoid valve Y1 is respectively connected to The outlet pipe C2 of the phase change energy storage tank and the water inlet pipe D1 of the water separator, and the circulating water pump P2 is set between the water inlet pipe D1 of the water separator and the solenoid valve Y1; the condenser water inlet pipe B2 on the side of the expansion valve passes through the electric The two-way valve J2, flow meter, three-way reversing valve S2, circulating water pump P3, and flow meter are connected to the outlet pipe E1 of the water collector; the outlet pipes D2, D3, D4, and D5 of the water separator respectively pass through the electric two-way valve J3, J5, J7, J9 are connected to the water inlet of the corresponding fan coil unit 1; the water inlet pipes E2, E3, E4, E5 of the water collector respectively pass through the electric two-way valve J4, J6, J8, J10 and the water outlet of the fan coil unit 1 Connected; the third end of the three-way reversing valve S2 is connected to the water inlet pipe C3 of the phase-change energy storage tank, and the phase-change energy storage tank outlet pipe C4 is externally connected to the pipeline between the three-way reversing valve S2 and the circulating water pump P3. There is also a circulating water pump P1 on the outlet pipe C4 of the phase-change energy storage water tank; the water inlet pipes C1 and C3 of the above-mentioned phase-change energy storage water tank are respectively connected to the two water inlets of the phase-change energy storage water tank 3 through solenoid valves Y2 and Y4; The outlet pipes C2 and C4 of the energy storage water tank are respectively connected to the two water outlets of the phase change energy storage water tank 3 through the solenoid valves Y3 and Y5; The outlet 107 is connected, and the outlet pipe F1 of the solar trough collector is connected to the inlet of the phase change energy storage water tank 3 through the check valve M1 and the flow meter; Heater outlet pipe F1, solar trough collector inlet pipe F2, water separator outlet pipe D2~D5, water collector inlet pipe E2~E5, water separator inlet pipe D1, water collector outlet pipe E1 respectively installed flow meter 10;

The intelligent control unit 11 is used to provide equipment operating parameters, status display screens and real-time information, various alarm processing, automatic generation of historical curves and reports, and remote control of equipment switches; so that technicians can solve faults without visiting the site in person Problems, real-time control of the parameters of each device to ensure the safe and stable operation of the system, real-time adjustment of various parameters according to weather conditions to meet the comfort of office workers, achieve the best working condition, and reduce unnecessary energy waste. The system can automatically Generate historical curves, reasonably predict future required heat and operating modes, and optimize system operation; the intelligent control unit 11 (see Figure 2) includes a heat pump controller 1101, a water tank controller 1102, a heat collector controller 1103, and a heat source database 1104 , valve controller 1105, PLC controller 1106, monitoring center database 1107, room monitoring computer 1108, room thermostat 1109;

The room monitoring computer stores a room database. The room monitoring computer is installed in the room to be heated and connected to the fan coil unit. At the same time, the room monitoring computer and the monitoring center database are connected wirelessly, and the room monitoring computer is connected to the fan coil unit for signal transmission. Collect and transmit the signal to the monitoring center database. After the monitoring center database analyzes it, it will in turn regulate the room monitoring computer; a room thermostat 1109 is installed in the room to be heated to collect the temperature of the corresponding room. The thermostat is connected to the corresponding electric two-way valve 13, and then controls the inlet and outlet water temperature of the corresponding fan coil unit by controlling the electric two-way valve. The number of rooms to be heated is n, and one fan coil unit is installed in each room, n The fan coil units are marked as G1, G2, ..., Gn in turn, and one room thermostat is installed corresponding to each room, and the n room thermostats are marked as Q1, Q2, ..., Qn in turn;

The heat pump controller 1101 is connected to the air source heat pump 12 for monitoring the data of the condenser, the water tank controller 1102 is connected to the phase change energy storage water tank 3, and the collector controller 1103 is connected to the solar trough collector 2 connected to carry out signal collection; the heat pump controller 1101, the water tank controller 1102, and the collector controller 1103 are all connected to the heat source database 1104, each controller transmits information to the heat source database 1104, and the heat source database 1104 transmits information to the monitoring center database 1107, the monitoring center database 1107 controls the heat source database 1104 in turn by analyzing the information; the heat source database 1104, the valve controller 1105, the room monitoring computer 1108, the PLC controller 1106 and the monitoring center database 1107 are wirelessly connected;

The valve controller 1105 is connected to the solenoid valves Y2-Y5 and gate valves Z1-Z2 on the phase change energy storage water tank, and the monitoring center database 1107 controls the solenoid valves Y2-Y5 and gate valves Z1-Z2 through the valve controller 1105; PLC control The device 1106 is connected to the above-mentioned flowmeter 10, and the PLC controller 1106 transmits it to the monitoring center database 1107 after information collection; the monitoring center database 1107 requests the data in any time from the room monitoring computer 1108 through the Internet transmission, and saves to the monitoring center database 1107 in order to give suggestions for more reasonable operation of each device. When the controller parameter settings of each device are found to be unreasonable, the parameters can be remotely modified independently, and can be read in the room database in real time as needed. Take data, so as to realize real-time monitoring of equipment.

The large-scale heating in the present invention refers to the heating of a large-scale building. The large-scale building includes a plurality of rooms, and a fan coil unit 1 is installed in each room.

The phase change energy storage water tank 3 (referring to Fig. 3) described in the present invention comprises two water inlets (101 and 103), two water outlets (102 and 104), an outlet 107, an inlet, a temperature measuring hole 105, a drain Water pipe 108, water supply pipe 109, liner 111, phase change material 112, casing 113, gate valves (Z1, Z2), check valve M2; The upper inlet of the energy storage water tank is connected to the outlet pipe F1 of the solar trough collector, the water inlet 101 is connected to the water inlet pipe C1 of the phase change energy storage tank, the water inlet 103 is connected to the water inlet pipe C3 of the phase change energy storage tank, and the water outlet 102 is connected to the phase change energy storage tank water inlet pipe C3. The outlet pipe C2 of the variable energy storage tank is connected, the outlet 104 is connected with the outlet pipe C4 of the phase change energy storage tank, and the outlet 107 is connected with the inlet pipe F2 of the solar trough collector; the temperature measuring hole 105 is located between the outlet 102 and the inlet 103 On the phase change energy storage water tank between, the phase change energy storage water tank 3 is made up of shell 113, liner 111, fill phase change material paraffin between shell and liner, set glass tube water level gauge 110 in the interior space of liner, An exhaust port 106 is set on the top of the phase-change energy storage tank, and the bottom of the phase-change energy storage tank is connected to the drain pipe 108 through the gate valve Z1, and a branch is drawn from the upper water pipe of the gate valve Z1 to connect to the one-way valve M2, the one-way valve M2 The water supply pipe 109 is connected through the gate valve Z2.

The fan coil unit 1 described in the present invention (refer to Fig. 4-5) includes a main machine shell 201, an insulating material 202, a main machine inner shell 203, a fan 204, a coil 205, a fresh air outlet 206, a return air outlet 207, an air supply outlet 208, Insulation box 209, sound insulation felt 210, heating pipe 211, fins 212, fresh air louvers 213, return air louvers 214, grille 215, filter filter layer 216, activated carbon adsorption layer 217, biological enzyme purification layer 218, anion purification layer 219 , for specific structural connections, see the prior application 201611211869.6.

A further feature of the present invention is that the phase change material in the phase change energy storage water tank is a paraffin composite phase change material. Considering the cost problem, a relatively cheap paraffin was selected as the phase change material, and nano-copper oxide was added to the phase change material. The composite phase change material was prepared by magnetic stirrer and ultrasonic vibration. Before the preparation, the thermal conductivity was changed from the original 0.71W/㎡ has changed to 1.07W/㎡, and the latent heat value has changed from 139.37J/g to 134.8J/g. The addition of nano-copper oxide has little effect on the latent heat value of the phase change material. The phase change energy storage water tank of the present invention The water temperature is set between 42°C and 45°C, which can meet the indoor temperature requirements. The paraffin composite phase change material used in the present invention has a melting point of 44° C. and a latent heat of phase change of 134.8 J/g. During the day, it absorbs the heat produced by the solar trough collector and the air source heat pump. At night, because the temperature is lower than the melting point of the phase change material, it starts to solidify and release heat, heating the cold air in the room to meet the needs of heating and protection management.

The solar trough heat collector of the present invention absorbs solar radiation energy and transfers heat to water, the solar trough heat collector has high thermal efficiency, can absorb a large amount of useful energy and store it in the phase change energy storage water tank, and greatly improves the energy efficiency.

A further feature of the present invention is that a sound insulation felt is added to the fan coil unit, which can effectively reduce the interference of the noise inside the machine to the indoor personnel and greatly improve the work efficiency of the indoor personnel; In the wind direction, there are filter element filter layer, activated carbon adsorption layer, biological enzyme purification layer and negative ion purification layer arranged in sequence. The filter element filter layer increases the filtration area and can effectively filter and absorb fine particles and dust in the air. The odor in the air and trace toxic gases such as ammonia, formaldehyde, and stupid are adsorbed. The biological enzyme purification layer is an immobilized enzyme layer made by immobilizing highly active enzymes extracted from excellent bacteria on the carrier. A variety of pollutants in the air are biodegraded, and the negative ion purification layer activates the oxygen molecules in the air, making them more active and easily absorbed by people, promoting metabolism.

The operation method of the smart heating control system for large-scale public buildings based on solar energy in the present invention is as follows: when the weather is fine and the amount of solar radiation is sufficient during the day, it only needs to send an opening command to the collector controller through the monitoring center database, and the solar trough heat collector Device 2 turns on automatically. At this time, the solar trough collector 2 combined with the phase change energy storage water tank 3 is in an energy storage state, and the solar trough collector 2 converts the sunlight irradiated on its surface into heat energy to heat the water from the phase change energy storage water tank 3 , the water in the phase change energy storage water tank 3 is continuously circulated and heated under the promotion of the booster pump P4, until the temperature difference is lower than the set value or the water temperature exceeds the set temperature, the solar trough collector will stop running; monitoring The central database sends an opening instruction to the heat pump controller and valve controller, the air source heat pump is turned on, the solenoid valves Y2 and Y5 are opened, and the supercooled high-pressure refrigerant is throttled and decompressed by the expansion valve 6 to form a low-temperature and low-pressure mixture of liquid and gas. The refrigerant working medium enters the evaporator 5 and exchanges heat with the outdoor air. The low-temperature and low-pressure liquid and gaseous mixed refrigerant working medium becomes a low-temperature and low-pressure gaseous refrigerant, which becomes a high-temperature and high-pressure gaseous refrigerant through the compressor 4. The water in the device 7 exchanges heat with the medium water, and the water after gaining heat is divided into two paths: one path flows through the solenoid valve Y2 and enters the phase-change energy storage tank 3 for energy storage, while the lower-temperature water at the bottom of the phase-change energy storage tank 3 flows into the The solenoid valve Y5 enters the condenser 7 under the impetus of the circulating water pump P1 and continues to circulate and heat until the heat exchange temperature difference cannot satisfy the circulation, and the energy storage mode of the air source heat pump system is terminated; the other path enters the water separator 8 under the impetus of the circulating water pump P2 , according to the principle of equal distribution of flow, hot water evenly flows into the fan coil unit 1 of each room, and performs heat exchange with the cold air in the room. The heat exchange is carried out again in the device 7, and this cycle continues to provide heat for the room; at night and on rest days, the monitoring center database sends a stop signal to the heat pump controller and collector controller, and sends an open signal to the valve controller. The solenoid valves Y3 and Y4 are opened, and the fan coil unit 1 needs to be turned on due to a small number of employees working overtime and the on-duty personnel in the duty room. The water obtained heat from the solar trough collector 2 and the air source heat pump enters the water separator 8 through the electromagnetic valve Y3 and driven by the circulating water pump P2. According to the principle of equal flow distribution, the hot water evenly flows into the required heating room. In the fan coil unit 1, it exchanges heat with the cold air in the room, and the cooled water merges in the water collector 9 and flows into the phase change energy storage tank 3 through the electromagnetic valve Y4 under the promotion of the circulating water pump P3. The room is continuously heated.

Realization of intelligent control unit functions:

1) Equipment data acquisition, storage and display: ① Each controller of the equipment collects signals such as pressure, temperature, and flow in real time, calculates the actual value after compensation, and then transmits these data to the room monitoring computer. The time interval of data collection is adjustable ; ②The room monitoring computer sorts out the monitoring data and stores them in the room database; ③Some important data such as water tank liquid level, hot and cold water temperature, flow pressure, etc. are displayed in the working condition diagram in real time, which is convenient for users to know the operating status of the unit in time .

2) Unit running switch control:

① Heating by solar trough collectors, energy storage by phase-change energy storage tanks: During the day, the collector controller receives an open signal from the monitoring center database, turns on solar trough collector 2, and operates the booster pump P4, heat the water in the phase-change energy storage tank 3; ② solar trough collector 2 and air source heat pump combined heating, phase-change energy storage tank 3 energy storage: collector controller, heat pump controller and The valve controller receives the opening signal from the monitoring center database, turns on the solar trough collector 2 and the air source heat pump, and runs the booster pump P4, one-way valve M1, electric two-way valves J1, J2, and solenoid valve Y2 , Y5, and circulating water pump P1, heat the water in the phase change energy storage tank 3; ③ part of the heat released by the air source heat pump is used to heat the cold air in the room, and part of it is stored in the phase change energy storage tank 3: heat pump control The controller and valve controller receive the opening signal from the monitoring center database, turn on the air source heat pump, run the electric two-way valve J1, J2, solenoid valve Y2, Y5, circulating water pump P1, and control the phase change energy storage tank 3 Heat the water, run the circulating water pump P2, water separator 8, fan coil unit 1, water collector 9, circulating water pump P3, and electric two-way valve J2 to heat the cold air in the room; ④Phase change energy storage tank 3 releases heat: The valve controller receives the opening signal from the database of the monitoring center, and turns on the solenoid valve Y3, circulating water pump P2, water separator 8, fan coil unit 1, water collector 9, circulating water pump P3, and solenoid valve Y4; ⑤Monitoring center According to the change of the water level in the phase change energy storage water tank 3, the database sends an open signal to the valve controller to open the gate valve Z1 or Z2 to discharge or replenish water. ⑥According to the room temperature, the room thermostat controls the start and stop of the electric two-way valve; according to whether there are people in the room, it controls the indoor fan switch, which is installed on the 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 operating temperature, the monitoring center database will send an opening signal to the collector controller after receiving the signal, and automatically Run the solar trough collector 2 to heat the hot water in the phase change energy storage tank, and when the solar radiation is sufficient and the heat released by the air source heat pump is sufficient to meet the indoor heat, the excess heat will be transported to 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 the signal, automatically closes the electromagnetic valves Y2 and Y5, and the booster pump P4 also stops running. When it is measured that the hot water level in the phase change energy storage tank 3 miles is lower than the low level and the temperature of the hot water is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high level is reached Or when the temperature of the hot water in the phase-change energy storage water tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped.

4) Fault alarm: When the unit fails, the monitoring center database will generate an alarm, and a dialog box corresponding to the fault type and solution will pop up on the monitoring interface, reminding the operator to repair the unit in time, and at the same time save the fault type to the monitoring center to the database.

5) Display of various curves: the system collects the temperature, pressure, and flow of each measuring point, and draws them into curves. According to the displayed curves, it can be judged whether the system is in a normal working state and whether it is in the optimal operation mode.

6) Data table display: The room monitoring computer, heat source database, and monitoring center database provide three query tables for the historical operation of the unit, the operation of room personnel, and the historical failure of the unit. Have a clear understanding of the operational situation.

7) Editing of system operating parameters: Room personnel can modify or reset system operating parameters according to comfort and external environment characteristics to meet the needs of prediction and optimization.

The operating method of the smart heating control system for large public buildings based on solar energy in the present invention mainly has two working modes: daytime holiday and night mode and daytime working day mode. These two working methods are described in detail below.

1) Daytime holiday and night mode: Since the duty room and a few rooms that need to work overtime need to be heated and reach the protection antifreeze temperature, this part of the heat is borne by the heat collected by the solar trough collector during the day.

The temperature data collected by the water tank controller is fed back to the monitoring center database. After the data is processed, if the temperature difference meets the cycle requirements, an instruction is sent to the booster pump P4 and the collector controller to start running. At this time, the solar trough collector 2 Convert the sunlight irradiated on its surface into heat energy to heat the water from the phase-change energy storage tank. The water in the phase-change energy storage tank 3 is continuously heated by the booster pump P4. When the water tank controller monitors When the temperature difference is lower than the set value or the liquid level is higher than the high liquid level and the information is transmitted to the monitoring center database, the monitoring center database instructs the booster pump P4 and the collector controller to stop running, and the solar trough collector 2 will stop running and the energy storage process is over. When it is measured that the hot water level in the phase change energy storage tank 3 miles is lower than the low level and the temperature of the hot water is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high level is reached Or when the temperature of the hot water in the phase-change energy storage water tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped.

Overtime workers or personnel on duty use the fan switch to turn on the fan coil unit, and the monitoring center database sends an opening command to the valve controller, and the solenoid valve Y3, circulating water pump P2, circulating water pump P3, and solenoid valve Y4 are turned on. The water obtained heat from the solar trough collector 2 enters the water separator 8 through the electromagnetic valve Y3 and is driven by the circulating water pump P2. According to the principle of equal flow, the hot water flows evenly into the fan coil unit 1 of the required heating room. In the interior, heat exchange is performed with the cold air in the room, and the cooled water converges in the water collector 9 and flows into the phase-change energy storage water tank 3 through the solenoid valve Y4 under the promotion of the circulating water pump P3, so as to circulate continuously for the room. . When the indoor occupants feel too cold or too hot, they can independently modify the parameters remotely to achieve the optimal operating mode and the most comfortable indoor environment.

During this period, the temperature, pressure and flow of the inlet and outlet of the solar trough collector 2 collected by each equipment controller, the water temperature at the top and bottom of the phase change energy storage tank 3, the water level line of the water tank, the operating status of the booster pump P4, the solenoid valve Y3 valve On-site real-time data such as opening degree, operating status of circulating water pump P2, temperature and air volume pressure at the air outlet of fan coil unit 1, temperature and air volume pressure at the return air outlet, operating status of circulating water pump P3, and valve opening degree of solenoid valve Y4 will be transmitted to the monitoring center database. The monitoring computer can also extract data of various time periods from the monitoring center database for real-time monitoring.

2) Working days during the day: Since all rooms need to be heated on weekdays, the heat required is large, and the heat obtained by the solar trough collector 2 is difficult to meet the demand, so the air source heat pump is selected to bear this part of the load. The solar trough collector 2 is still turned on to heat the water in the phase-change energy storage tank, and the excess heat produced by the air source heat pump will also be stored in the phase-change energy storage tank 3 for use at night.

The temperature data collected by the water tank controller is fed back to the monitoring center database. After the data is processed, if the temperature difference meets the cycle requirements, an instruction is sent to the booster pump P4 and the collector controller to start running. At this time, the solar trough collector 2 Convert the sunlight irradiated on its surface into heat energy to heat the water from the phase change energy storage water tank 3, and the water in the phase change energy storage water tank 3 is continuously heated by the booster pump P4, when the water tank controller When it is detected that the temperature difference is lower than the set value or the liquid level is higher than the high liquid level and the information is transmitted to the monitoring center database, the monitoring center database will instruct the booster pump P4 and the collector controller to stop running. The solar trough collector 2 will stop running and the energy storage process is over. When it is measured that the hot water level in the phase change energy storage tank 3 miles is lower than the low level and the temperature of the hot water is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high level is reached Or when the temperature of the hot water in the phase-change energy storage water tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped.

Workers use the fan switch to turn on the fan coil, and the monitoring center database sends an opening command to the valve controller and the heat pump controller, and the solenoid valve Y2, solenoid valve Y5, circulating water pump P1, circulating water pump P2, and circulating water pump P3 are turned on. The condensed supercooled high-pressure refrigerant is throttled and decompressed by the expansion valve 6 to become a low-temperature and low-pressure liquid and gaseous mixed refrigerant. After entering the evaporator 5, it exchanges heat with the outdoor air. The low-temperature and low-pressure liquid and gaseous mixed refrigerant The working fluid becomes a low-temperature and low-pressure gaseous refrigerant, which becomes a high-temperature and high-pressure gaseous refrigerant through the compressor 4 and exchanges heat with the medium water in the condenser 7. The water obtained by heat is divided into two paths: one path flows into the solenoid valve Y2 and enters The phase-change energy storage tank 3 stores energy, and the lower temperature water at the bottom of the phase-change energy storage tank 3 flows into the solenoid valve Y5 and enters the condenser 7 under the push of the circulating water pump P1 to continue circulating heating until the heat exchange temperature difference cannot meet the requirements of the cycle. , the heat pump controller will terminate the energy storage mode of the air source heat pump; the other path enters the water separator 8 under the push of the circulating water pump P2, and according to the principle of equal flow, the hot water flows into the fan coil unit 1 of each room evenly. The cold air in the room performs heat exchange, and the cooled water joins in the water collector 9 and flows into the condenser 7 under the impetus of the circulating water pump P3 for heat exchange again. This cycle continues to provide heat for the room. When the indoor occupants feel too cold or too hot, they can independently modify the parameters remotely to achieve the optimal operating mode and the most comfortable indoor environment.

During this period, the temperature and pressure of the inlet and outlet of the condenser 7, the opening of the solenoid valve Y2, the water temperature at the top and bottom of the phase change energy storage tank 3, the water level line of the phase change energy storage tank 3, and the operating status of the circulating water pump P1 collected by each equipment controller , the running status of the circulating water pump P2, the temperature and air volume pressure of the air outlet of fan coil unit 1, the temperature and air volume pressure of the return air outlet, and the running status of the circulating water pump P3, etc. Extract data of various time periods for real-time monitoring.

The monitoring center database can request data from the room monitoring computer at any time through the Internet network transmission, and save it in the monitoring center database, so as to give suggestions for more reasonable operation of each device. When the controller parameter setting of each device is found to be unreasonable , can independently modify the parameters remotely, and can read data from the room database in real time as needed, so as to realize real-time monitoring of the equipment.

When the unit fails, the monitoring center database will generate an alarm, and a dialog box corresponding to the failure type and solution will pop up on the monitoring interface, reminding the operator to repair the unit in time, and at the same time save the failure type in the monitoring center database.

What is not involved in the present invention is applicable to the prior art.

Claims (4)

1. A large-scale public building intelligent heating control system based on solar energy, characterized in that the system includes a fan coil unit, a solar trough collector, a phase change energy storage water tank, a compressor, an evaporator, an expansion valve, and a condenser , water distributor, water collector and intelligent control unit; The outlet end on one side of the condenser is connected to the expansion valve, and the outlet end on the other side is connected to the heating area; the expansion valve is connected to the compressor through the evaporator, and the outlet of the compressor is connected to the inlet of the condenser. The above-mentioned compressor, evaporator, expansion valve, and condenser constitute an air heat source pump; the outlet pipe B1 of the condenser located on the side of the heating area is connected to one end of the three-way reversing valve S1 through the electric two-way valve J1, and the three-way reversing The second end of the valve S1 is connected to one end of the solenoid valve Y1, the third end of the three-way reversing valve S1 is connected to the water inlet pipe C1 of the phase change energy storage tank; the other end of the solenoid valve Y1 is respectively connected to the outlet pipes C2, The water separator inlet pipe D1 is provided with a circulating water pump P2 between the water separator inlet pipe D1 and the solenoid valve Y1; the condenser water inlet pipe B2 on the side of the expansion valve passes through the electric two-way valve J2, flow meter, three The reversing valve S2, the circulating water pump P3, and the flow meter are connected to the outlet pipe E1 of the water collector; the outlet pipes of the water separator are respectively connected to the water inlet of the corresponding fan coil through the corresponding electric two-way valve; the water inlet pipe of the water collector They are respectively connected to the water outlets of the corresponding fan coil units through the corresponding electric two-way valves; the third end of the three-way reversing valve S2 is connected to the water inlet pipe C3 of the phase change energy storage tank, and the three-way reversing valve S2 and the circulating water pump The outlet pipe C4 of the phase change energy storage tank is externally connected to the pipeline between P3, and a circulating water pump P1 is also provided on the outlet pipe C4 of the phase change energy storage tank; Y4 is connected to the two water inlets of the phase-change energy storage tank; the outlet pipes C2 and C4 of the phase-change energy storage tank are respectively connected to the two outlets of the phase-change energy storage tank through solenoid valves Y3 and Y5; the inlet pipe of the solar trough collector F2 is connected to the outlet of the phase-change energy storage tank through the booster pump P4, and the outlet pipe F1 of the solar trough collector is connected to the inlet of the phase-change energy storage tank through the one-way valve M1 and the flow meter; and the outlet pipe B1 of the condenser , condenser water inlet pipe B2, solar trough collector outlet pipe F1, solar trough collector inlet pipe F2, water separator outlet pipe, water collector inlet pipe E2～E5, water separator inlet pipe D1, collector Flowmeters are respectively installed on the water outlet pipe E1 of the water device; The intelligent control unit is used to provide equipment operating parameters, status display screens and real-time information, various alarm processing, automatic generation of historical curves and reports, and remote control of equipment switches; The phase change energy storage water tank includes 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 supply pipe, an inner tank, and a phase change material , casing, gate valve (Z1 and Z2), one-way valve M2; the temperature measuring hole is located on the phase-change energy storage water tank between the water outlet (102) and the water inlet (103), and the phase-change energy storage water tank consists of a casing, an inner tank Composition, filling phase change material between the shell and the inner tank, setting a glass tube water level gauge in the inner space of the inner tank, setting an exhaust port on the top of the phase change energy storage tank, and connecting the bottom of the phase change energy storage tank through a gate valve Z1 The drain pipe leads a branch in the upper water pipe of the gate valve Z1 to connect to the one-way valve M2, and the one-way valve M2 is connected to the water supply pipe through the gate valve Z2; The intelligent control unit includes 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 thermostat; The room monitoring computer stores a room database. The room monitoring computer is installed in the room to be heated and connected to the fan coil unit. At the same time, the room monitoring computer and the monitoring center database are connected wirelessly, and the room monitoring computer is connected to the fan coil unit for signal transmission. Collect and transmit the signal to the monitoring center database. After the monitoring center database analyzes it, it will in turn regulate the room monitoring computer; a room thermostat is installed in the room to be heated, and the room thermostat is connected to the corresponding electric two-way Valve connection, by controlling the electric two-way valve to control the inlet and outlet water temperature of the corresponding fan coil unit, the number of rooms to be heated is n, each room is installed with a fan coil unit, and each room is equipped with a room thermostat; The heat pump controller is connected with the air source heat pump for monitoring the 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 heat collector; the heat pump controller, Both the water tank controller and the collector controller are connected to the heat source database, and the heat source database, valve controller, room monitoring computer, and PLC controller are wirelessly connected to the monitoring center database; The valve controller is connected to the electromagnetic valve Y2-Y5 and the gate valve Z1-Z2 on the phase change energy storage water tank, and the monitoring center database controls the electromagnetic valve Y2-Y5 and the gate valve Z1-Z2 through the valve controller; the PLC controller is connected to the above-mentioned the flowmeter; the monitoring center database asks the room monitoring computer for any time data through the Internet network transmission, and saves it in the monitoring center database. The monitoring center database can give suggestions on the reasonable operation of each device. When the device parameter setting is unreasonable, it can independently modify the parameters remotely, and read data from the room database in real time as needed, so as to realize real-time monitoring of the device. 2. The smart heating control system for large public buildings based on solar energy according to claim 1, characterized in that the phase change material in the phase change energy storage water tank is a paraffin composite phase change material with a melting point of 44°C. The latent heat of phase change is 134.8 J/g. 3. The smart heating control system for large-scale public buildings based on solar energy according to claim 1, characterized in that the fan coil unit includes a main machine shell, thermal insulation material, main machine inner shell, fan, coil, fresh air outlet, return Air outlet, air supply outlet, heat insulation box, sound insulation blanket, heating pipe, fins, fresh air louvers, return air louvers, grille, filter element filter layer, activated carbon adsorption layer, biological enzyme purification layer, negative ion purification layer. 4. A method of operating the solar energy-based large-scale public building intelligent heating control system according to claim 1, the method has two working forms: daytime holiday and night mode and daytime working day mode, 1) Daytime holiday and night mode: Since the duty room and a few rooms that need to work overtime need to be heated and reach the protection antifreeze temperature, this part of the heat is borne by the heat collected by the solar trough collector during the day; The temperature data collected by the water tank controller is fed back to the monitoring center database. After the data is processed, if the temperature difference meets the cycle requirements, an instruction is sent to the booster pump P4 and the collector controller to start running. At this time, the solar trough collector Convert the sunlight irradiated on its surface into heat energy to heat the water from the phase change energy storage tank. The water in the phase change energy storage tank is continuously heated by the booster pump P4. When the water tank controller monitors the temperature difference When it is lower than the set value or the liquid level is higher than the high liquid level and transmits its information to the monitoring center database, the monitoring center database will instruct the booster pump P4 and the collector controller to stop running, and the solar trough collector will stop running , the energy storage process ends; when the measured hot water level in the phase change energy storage tank is lower than the low level and the hot water temperature is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high liquid level is reached or the temperature of the hot water in the phase-change energy storage tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped; Overtime workers or personnel on duty use the fan switch to turn on the fan coil, and the monitoring center database sends an opening command to the valve controller, and the solenoid valve Y3, circulating water pump P2, circulating water pump P3, and solenoid valve Y4 are turned on; obtained from the solar trough collector The hot water enters the water separator through the electromagnetic valve Y3 and is driven by the circulating water pump P2. According to the principle of equal flow, the hot water flows evenly into the fan coil in the room to be heated, and exchanges heat with the cold air in the room to cool the air. The final water converges in the water collector and flows into the phase change energy storage water tank through the solenoid valve Y4 under the promotion of the circulating water pump P3. This cycle continues to provide heat for the room; when the indoor personnel feel too cold or overheated, they can independently Parameters can be modified remotely to achieve the optimal operating mode and the most comfortable indoor environment; During this period, the temperature, pressure and flow of the inlet and outlet of the solar trough collector collected by each equipment controller, the water temperature at the top and bottom of the phase change energy storage tank, the water level line of the water tank, the operating status of the booster pump P4, and the valve opening of the solenoid valve Y3 , circulating water pump P2 operating status, fan coil unit air outlet temperature and air volume pressure, return air outlet temperature and air volume pressure, circulating water pump P3 operating status, solenoid valve Y4 valve opening and other on-site real-time data will be transmitted to the monitoring center database, and the room monitoring computer will also The data of each time period can be extracted from the monitoring center database for real-time monitoring; 2) Daytime working day mode: Since all rooms need to be heated on working days, the heat required is relatively large, and the heat obtained by the solar trough collector is difficult to meet the demand, so the air source heat pump is selected to bear this part of the load; and the solar trough The heat collector is still turned on to heat the water in the phase change energy storage tank, and the excess heat produced by the air source heat pump will also be stored in the phase change energy storage tank for night use; The temperature data collected by the water tank controller is fed back to the monitoring center database. After the data is processed, if the temperature difference meets the cycle requirements, an instruction is sent to the booster pump P4 and the collector controller to start running. At this time, the solar trough collector Convert the sunlight irradiated on its surface into heat energy to heat the water from the phase change energy storage tank. The water in the phase change energy storage tank is continuously heated by the booster pump P4. When the water tank controller monitors the temperature difference When it is lower than the set value or the liquid level is higher than the high liquid level and transmits its information to the monitoring center database, the monitoring center database will instruct the booster pump P4 and the collector controller to stop running, and the solar trough collector will stop running , the energy storage process ends; when the measured hot water level in the phase change energy storage tank is lower than the low level and the hot water temperature is higher than the operating temperature, the valve controller will open the gate valve Z2 and the one-way valve M2 to replenish water. When the high liquid level is reached or the temperature of the hot water in the phase-change energy storage tank is lower than the operating temperature, the gate valve Z2 will be closed, and water replenishment will be stopped; Workers use the fan switch to turn on the fan coil, and the monitoring center database sends an opening command to the valve controller and the heat pump controller, and the solenoid valve Y2, solenoid valve Y5, circulating water pump P1, circulating water pump P2, and circulating water pump P3 are turned on; The cold high-pressure refrigerant is throttled and depressurized by the expansion valve to become a low-temperature and low-pressure liquid and gaseous mixed refrigerant. After entering the evaporator, it exchanges heat with the outdoor air. The gaseous refrigerant is transformed into a high-temperature and high-pressure gaseous refrigerant through the compressor and exchanges heat with the medium water in the condenser. The water after gaining heat is divided into two paths: one path flows into the solenoid valve Y2 and enters the phase change energy storage tank for energy storage, while the lower temperature water at the bottom of the phase-change energy storage tank flows into the solenoid valve Y5 and enters the condenser under the push of the circulating water pump P1 to continue circulating and heating until the heat exchange temperature difference cannot meet the circulation, the heat pump controller will make the air source heat pump storage The energy mode is terminated; the other channel is driven by the circulating water pump P2 and enters the water distributor. According to the principle of equal flow distribution, hot water flows into the fan coils in each room evenly, and exchanges heat with the cold air in the room. The confluence in the water collector flows into the condenser under the impetus of the circulating water pump P3 for heat exchange again. This cycle continuously supplies heat to the room; when the indoor personnel feel too cold or overheated, they can independently modify the parameters remotely to achieve the best Optimal operating mode and the most comfortable indoor environment; During this period, the temperature and pressure of the inlet and outlet of the condenser collected by each equipment controller, the opening of the solenoid valve Y2, the water temperature at the top and bottom of the phase change energy storage tank, the water level line of the phase change energy storage tank, the operating status of the circulating water pump P1, the circulating water pump On-site real-time data such as the operating status of P2, the temperature and air volume pressure of the fan coil outlet, the temperature and air volume pressure of the return air outlet, and the operating status of circulating water pump P3 will be transmitted to the monitoring center database, and the room monitoring computer can also extract various time periods from the monitoring center database data for real-time monitoring.

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