CN106610052B - Hydraulic balance adjusting method and system for isothermal-difference variable flow - Google Patents
Hydraulic balance adjusting method and system for isothermal-difference variable flow Download PDFInfo
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Abstract
The invention relates to the technical field of heat supply regulation, in particular to a hydraulic balance regulation method for isothermal difference variable flow, which comprises the following steps of: s1 indoor temperature t for users on each loopsThe water supply temperature t of the main loopgThe return water temperature t of each loopiAnd the return water temperature t of the total loophCollecting data parameters of pressure difference delta p between a water supply pipe and a water return pipe of the general loop; s2, calculating the room temperature deviation delta t of the users on each loopsTemperature difference delta t of supply and return water of total loop and temperature difference delta t of supply and return water of each loopi(ii) a S3, analyzing and comparing the data parameters collected in the step S1 and the data results obtained in the step S2 to obtain the control quantity of the total required loop water supply quantity and the control quantity of each loop water supply quantity; and S4, adjusting and controlling the total loop water supply amount according to the control amount of the total loop water supply amount obtained in the step S3, and adjusting and controlling the control amount of each loop water supply amount. The dynamic regulation method is adopted to control the water supply amount in real time, thereby achieving the hydraulic dynamic balance and realizing the thermodynamic balance.
Description
Technical Field
The invention relates to the technical field of heat supply regulation, in particular to a method and a system for regulating hydraulic balance of isothermal difference variable flow.
Background
At present, along with the further improvement of energy-saving requirements, room temperature standard requirements and heating fine management requirements, the requirements on the scientificity and rationality of hydraulic balance adjustment of a heat supply network are more and more strong, the indoor temperature of a user is 18 +/-2 ℃ which is the standard of heating work, heat provided by a heating system to the indoor of the user is used as heat load, the heating system achieves the heat load of the preset user by changing the water supply amount of a loop, the water supply amount is not reasonably distributed among the users according to the design requirements due to the difference of the distance from a heat source, the extension or reconstruction system, the old and new degree of residential housing, the heat preservation effect and the like, and the indoor temperature of part of users does not accord with the heating standards, namely the phenomenon of uneven heating and cooling caused by hydraulic imbalance. Some systems have less serious hydraulic imbalance, and the water supply amount can be basically distributed among users according to the required amount, but because the construction of each user of the system is in different periods, the related times are different, designers are different, and the designed heat load of a heating system is greatly different, so that the heating with the same heat source and the same heat medium temperature can also cause the phenomenon of thermal imbalance. The phenomenon of thermal imbalance commonly exists in a heat supply pipe network, the efficiency of a heat supply system is reduced, the heat supply quality is deteriorated, and meanwhile, the energy consumption and the operation cost are greatly increased.
To solve the above problems, the most common method is to increase the flow rate of the water system and raise the pump lift, but this still causes uneven cooling and heating and more waste of electric energy. In engineering practice, in order to obtain hydraulic balance, throttling elements such as a throttling orifice plate, a regulating valve and a dynamic flow balance valve are often adopted to regulate the resistance and the flow of a pipeline, so that the actual water supply of each loop meets the requirement of the designed water supply or keeps a fixed value. However, even if this is done, the static hydraulic balance does not guarantee the dynamic demand of heat for the individual circuits in a heating system charged for heat metering. This is because in a heat metering heating system, the water supply of the system is inevitably changed by the autonomous adjustment of the user, and the hydraulic balance of the system is changed accordingly, so that a new hydraulic imbalance is generated. As a result, in a constant flow water system in which each loop is provided with a manual adjustment element such as an orifice plate or a manual adjustment valve, resistance and water supply amount of the total loop are changed, and water supply amount of other loops is increased or decreased; for a constant-flow heating system with self-operated flow valves installed in each loop, when the pressure difference between the front and the rear of the valves is still in the normal working range, the water supply amount of each loop can still be kept unchanged, but the flow of other terminal equipment in the same loop is changed, and the hydraulic imbalance in each loop is generated; when the flow changes greatly, so that the pressure difference of a water system exceeds the normal working range of the valve, the dynamic balance function of the valve fails, and the hydraulic imbalance of the whole system is caused.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problems that the existing heating system and heating method can not ensure the heat required by each loop, can not reasonably distribute the indoor temperature of a user, can not reach the indoor heating standard of the user, and can not cause water dynamic balance problem due to the flow and pressure change of the heating system, thereby causing water power imbalance and heating power imbalance of the heating system.
(II) technical scheme
In order to solve the technical problem, the invention provides a hydraulic balance adjusting method for isothermal difference variable flow, which comprises the following steps of:
s1, data acquisition: indoor temperature t for subscribers on each loopsThe water supply temperature t of the main loopgThe return water temperature t of each loopiAnd the return water temperature t of the total loophCollecting data parameters of pressure difference delta p between a water supply pipe and a water return pipe of the general loop;
s2, data processing: calculating the room temperature deviation delta t of users on each loopsTemperature difference delta t of supply and return water of total loop and temperature difference delta t of supply and return water of each loopi；
S3, analysis and comparison: analyzing and comparing the data parameters collected in the step S1 with the data results obtained in the step S2 to obtain the control quantity of the total required loop water supply and the control quantity of each loop water supply;
s4, adjusting and controlling: adjusting and controlling the total loop water supply amount according to the control amount of the total loop water supply amount obtained in the step S3 to ensure that the pressure difference delta p between the water supply pipe and the water return pipe of the total loop is kept stable, and adjusting and controlling the water supply amount of each loop according to the control amount of the water supply amount of each loop obtained in the step S3 to ensure that the temperature difference delta t between the water supply and the water return of each loopiMaintaining a uniform or satisfactory indoor temperature t of the subscribers on each loopsAnd (4) requiring.
Wherein, step S3 specifically includes the following steps:
s31, when the design heat loads of users on each loop are consistent, if the temperature difference delta t of supply and return water of the loop is the sameiSupply and return water temperature less than total loopThe difference delta t indicates that the loop water supply is excessive and needs to be reduced; if the temperature difference delta t of supply and return water of the loopiIf the temperature difference delta t of the supply and return water of the total loop is larger than the temperature difference delta t of the supply and return water of the total loop, the water supply quantity of the loop is insufficient, and the water supply quantity of the loop needs to be increased; if the temperature difference delta t of supply and return water of the loopiIf the temperature difference is equal to the temperature difference delta t of the supply and return water of the total loop, the water supply quantity of the loop meets the requirement;
when the design heat loads of the users on each loop are not consistent, if the indoor temperature deviation delta t of the users on the loop is differentsIf the water supply quantity is less than zero, the water supply quantity of the loop is insufficient, and the water supply quantity of the loop needs to be increased; if indoor temperature deviation delta t of users on loopsIf the water supply quantity is larger than zero, the water supply quantity of the loop is excessive, and the water supply quantity of the loop needs to be reduced; if indoor temperature deviation delta t of subscriber on loopsIf the water supply quantity is equal to zero, the water supply quantity of the loop meets the requirement;
s32, if the temperature difference delta t of the water supply and return of each loopiIf the temperature difference is larger than the supply-return water temperature difference delta t of the total loop, the water supply quantity of the total loop is insufficient, and the water supply quantity of the total loop needs to be increased; if the temperature difference delta t of supply and return water of each loopiIf the temperature difference is less than the temperature difference delta t of the supply and return water of the total loop, the water supply of the total loop is excessive, and the water supply of the total loop needs to be reduced.
Wherein, when the thermal load of the user on each loop dynamically changes, the step S3 further includes the following steps: if the pressure difference delta p between the water supply pipe and the water return pipeline of the main loop is increased, the water supply amount of the main loop is excessive, and the water supply amount of the main loop needs to be reduced; if the pressure difference delta p between the water supply pipe and the water return pipeline of the total loop is reduced, the water supply quantity of the total loop is insufficient, and the water supply quantity of the total loop needs to be increased; and if the pressure difference delta p between the water supply pipe and the water return pipeline of the total loop is not changed, the water supply quantity of the total loop is balanced.
Wherein, in step S2, tnThe indoor design temperature of the users on each loop is the indoor temperature deviation delta t of the users on each loopsTemperature difference delta t of supply and return water of total loop and temperature difference delta t of supply and return water of each loopiThe calculation method comprises the following steps: Δ ts＝ts-tn，Δt＝tg-th，Δti＝tg-ti。
In step S2, the collected data parameters are converted into digital signals by a control device and then processed, in step S4, the control device adjusts and controls the loop water supply amount through an electric regulating valve, and the control device adjusts and controls the total loop water supply amount through a frequency converter.
Wherein in step S1, the temperature t of the water supply to the total loopgThe return water temperature t of each loopiAnd the return water temperature t of the total loophThe time interval for acquiring the data parameter is determined according to the longest water circulation period of the loop.
The invention also provides an isothermal difference variable flow hydraulic balance adjusting system which comprises a main loop and a plurality of loops, wherein the loops are respectively connected with the main loop in parallel, each loop is provided with an electric regulating valve and a water temperature sensor, a room temperature sensor is arranged in a user room on each loop, the main loop is provided with the electric regulating valve, a water supply pipe and a water return pipe of the main loop are provided with the water temperature sensors, the water supply pipe of the main loop is connected with one end of a differential pressure sensor, and the other end of the differential pressure sensor is connected with the water return pipe of the main loop.
The main loop further comprises a heat source and a circulating water pump, one end of the heat source is connected with a water supply pipe of the main loop, the other end of the heat source is connected with a water return pipe of the main loop, and the circulating water pump is arranged on a connecting pipeline.
The water temperature sensor, the differential pressure sensor and the room temperature sensor are all connected with the parameter acquisition box, the electric regulating valve and the circulating water pump on the loop are all connected with the controller, the input end of the computer is connected with the parameter acquisition box, and the output end of the computer is connected with the controller.
Wherein, the controller is connected with the circulating water pump through a frequency converter.
(III) advantageous effects
The technical scheme of the invention has the following advantages: the invention can acquire, analyze and process the parameters of water temperature, room temperature, pressure difference and the like on the main loop and each loop in time, control the water supply quantity of the main loop and each loop according to the analysis result, and adopt a dynamic adjustment method to control the water supply quantity in real time to achieve hydraulic dynamic balance, thereby ensuring that users on each loop can obtain required heat, ensuring the heat supply effect, still realizing the thermal balance of a heat supply system under the condition of different thermal load states, effectively reducing the energy consumption of the heat supply system in transmission and distribution and obtaining good energy-saving effect.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the technical solutions will be further explained with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of a hydraulic balance adjusting method for isothermal temperature variation according to an embodiment of the present invention;
FIG. 2 is a structural diagram of a second-order temperature difference variable flow hydraulic balance adjusting system in the embodiment of the invention.
In the figure: 1: a water temperature sensor; 2: room temperature sensor, 3: a total loop; 4: a loop; 5: an electric control valve; 6: a user; 7: a differential pressure sensor; 8: a water circulating pump; 9: a frequency converter; 10: a controller; 11: a parameter collection box; 12: a computer; 13: a heat source.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, "a plurality", and "a plurality" mean two or more unless otherwise specified.
Example one
As shown in fig. 1, the method for adjusting hydraulic balance of isothermal difference variable flow rate according to the embodiment of the present invention includes the following steps:
s1, data acquisition: indoor temperature t for subscribers on each loopsWater supply temperature t of the main loopgThe return water temperature t of each loopiAnd the return water temperature t of the main loophCollecting data parameters of pressure difference delta p between a water supply pipe and a water return pipe of the general loop;
s2, data processing: calculating the room temperature deviation delta t of users on each loopsTemperature difference delta t of supply and return water of total loop and temperature difference delta t of supply and return water of each loopi；
S3, analysis and comparison: analyzing and comparing the data parameters collected in the step S1 with the data results obtained in the step S2 to obtain the control quantity of the total required loop water supply and the control quantity of each loop water supply;
s4, adjusting and controlling: adjusting and controlling the total loop water supply amount according to the control amount of the total loop water supply amount obtained in the step S3 to ensure that the pressure difference delta p between the water supply pipe and the water return pipe of the total loop is kept stable, and adjusting and controlling the water supply amount of each loop according to the control amount of the water supply amount of each loop obtained in the step S3 to ensure that the temperature difference delta t of the supply water and the return water of each loopiMaintaining a uniform or satisfactory indoor temperature t for the subscribers on each loopsAnd (4) requiring.
According to the invention, parameters such as water temperature, room temperature, pressure difference and the like on the main loop and each loop are acquired, analyzed and processed in time, the water supply quantity of the main loop and each loop is controlled according to the analysis result, and the water supply quantity is controlled in real time by adopting a dynamic adjustment method, so that the hydraulic dynamic balance is achieved, thus ensuring that users on each loop can obtain required heat, ensuring the heat supply effect, still realizing the thermal balance of the heat supply system under the condition of different thermal load states, effectively reducing the energy consumption of the heat supply system in transportation and distribution, and obtaining good energy-saving effect.
Further, in step S2, the collected data parameters are converted into digital signals by the control device for data processing, tnFor the indoor design temperature of the users on each loop, the room temperature deviation delta t of the users on each loopsTemperature difference delta t of supply and return water of total loop and temperature difference delta t of supply and return water of each loopiThe calculation method comprises the following steps: Δ ts＝ts-tn，Δt＝tg-th，Δti＝tg-ti. In step S4, the control device controls the loop water supply amount by adjusting the electric control valve, and the control device controls the total loop water supply amount by adjusting the inverter. The control device is used for carrying out control on automatic data acquisition, calculation, analysis and instruction output, the total loop and the water supply amount of each loop are controlled in real time, the adjustment is quick and sensitive, the control is accurate, the intelligence and controllability of a heat supply system are improved, the labor intensity of workers is reduced, the problem that the existing hydraulic adjusting method is complex and complicated is solved, and the adjusting effect is more visual.
In step S1, the temperature t of the water supplied to the overall circuitgThe return water temperature t of each loopiAnd the return water temperature t of the main loophThe time interval for acquiring the data parameters is determined according to the longest water circulation period of the loop. The data parameter acquisition time is determined according to the longest water flow circulation period of the loop, so that the difference of the water supply quantity change degrees of users on the loop with different distances from a heat source on the total loop and the indoor temperature change of the users at the distance are effectively avoidedThe effect is not obvious, the problem of near heat and far cold is caused, and the thermodynamic balance of each loop can be favorably realized to achieve the best effect.
Specifically, step S3 specifically includes the following steps:
s31, when the design heat loads of all users are basically consistent, the temperature difference delta t of the water supply and return of each loop is adjusted1、Δt2… …, comparing with the temperature difference delta t of the supply and return water of the total loop, and determining the control quantity of the electric regulating valve according to the magnitude of the temperature difference delta t of the supply and return water of the total loop: if the temperature difference delta t of supply and return water of a certain loop1、Δt2… … is less than the temperature difference delta t of the supply and return water of the total loop, which indicates that the water supply amount of the loop is excessive, and the electric regulating valve on the loop needs to be properly closed to reduce the water supply amount of the loop; otherwise, indicating that the loop water supply is insufficient, and properly opening an electric regulating valve on the loop to increase the loop water supply; if the temperature difference delta t of supply and return water of a certain loop1、Δt2… …, the temperature difference delta t of supply and return water of the total loop is close, which indicates that the water supply quantity of the loop meets the requirement, and the opening of the electric regulating valve on the loop does not need to be regulated;
when the design heat loads of part of users are inconsistent, the supply and return water temperature difference is properly increased or decreased during balance adjustment, and the increase or decrease value of the supply and return water temperature difference is determined according to the actual measurement condition of the indoor temperature of the part of users: if the indoor temperature deviation delta t of a loop usersIf the water supply quantity of the loop is less than zero, indicating that the water supply quantity of the loop is insufficient, and properly opening an electric regulating valve on the loop to increase the water supply quantity of the loop; otherwise, the water supply of the loop is excessive, and the electric regulating valve on the loop needs to be properly reduced to reduce the water supply of the loop; if some loop user indoor temperature deviation delta tsWhen the water supply quantity of the loop is close to zero, the water supply quantity of the loop meets the requirement, and the opening degree of an electric regulating valve on the loop does not need to be regulated;
s32, judging the total loop water supply amount and determining the control amount of the circulating water pump: if the temperature difference delta t of supply and return water of each loop1、Δt2… … are all larger than the temperature difference delta t of supply and return water of the total loop, which indicates that the water supply of the total loop is insufficient and can not meet the requirement of user heat load of each loop, and the circulation needs to be improvedThe frequency of the water pump is used for increasing the water supply amount of the total loop; if the temperature difference delta t of supply and return water of each loop1、Δt2… …, the temperature difference is less than the temperature difference delta t of the supply and return water of the total loop, which indicates that the water supply of the total loop is excessive and exceeds the requirement of the heat load of users of each loop, and the frequency of the circulating water pump needs to be reduced to reduce the water supply of the total loop.
Further, when the thermal load of the user on each loop dynamically changes, step S3 further includes the following steps: determining the control quantity of the circulating water pump according to the change of the differential pressure delta p between the water supply pipeline and the water return pipeline of the total loop: if the pressure difference delta p between the water supply pipe and the water return pipeline of the total loop is increased, the load of some loops is reduced, the water supply amount of the total loop is excessive, and the frequency of the circulating water pump needs to be reduced to reduce the water supply amount of the total loop; if the pressure difference delta p between the water supply pipe and the water return pipeline of the total loop is reduced, the load of some loops is increased, the water supply amount of the total loop is insufficient, and the frequency of a circulating water pump needs to be increased to increase the water supply amount of the total loop; if the pressure difference deltap between the water supply line and the water return line of the total loop is not substantially changed, it indicates that some loop loads are increased, while some loop loads are decreased, and the total loop water supply is balanced.
Example two
As shown in fig. 2, the invention also provides a hydraulic balance adjusting system with constant temperature difference and variable flow, which comprises a main loop 3 and a plurality of loops 4, wherein the loops 4 are respectively connected with the main loop 3 in parallel, each loop 4 is provided with an electric regulating valve 5 and a water temperature sensor 1, a room temperature sensor 2 is arranged in a room of a user 6 on each loop 4, a water supply pipe and a water return pipe of the main loop 3 are provided with the water temperature sensors 1, the water supply pipe of the main loop 3 is connected with one end of a differential pressure sensor 7, and the other end of the differential pressure sensor 7 is connected with the water return pipe of the main loop 3; the water temperature sensor is characterized by further comprising a control device, wherein one end of the control device is connected with the electric regulating valve 5, and the other end of the control device is connected with the water temperature sensor 1, the room temperature sensor 2 and the differential pressure sensor 7.
According to the invention, parameters such as water temperature, room temperature, pressure difference and the like on the main loop and each loop are acquired, analyzed and processed in time, the water supply quantity of the main loop and each loop is controlled according to the analysis result, and the water supply quantity is controlled in real time by adopting a dynamic adjustment method, so that the hydraulic dynamic balance is achieved, thus ensuring that users on each loop can obtain required heat, ensuring the heat supply effect, still realizing the thermal balance of the heat supply system under the condition of different thermal load states, effectively reducing the energy consumption of the heat supply system in transportation and distribution, and obtaining good energy-saving effect.
Wherein, the main loop 3 further comprises a heat source 13 and a circulating water pump 8, one end of the heat source 13 is connected with a water supply pipe of the main loop 3, the other end is connected with a water return pipe of the main loop 3, and the circulating water pump 8 is arranged on the connecting pipeline. Through the circulating water pump, water flows out from the heat source on the main loop, flows to each loop and then flows back to the heat source of the main loop, and hydraulic circulation of the heat supply system is realized.
The control device comprises a parameter acquisition box 11, a controller 10 and a computer 12, wherein the water temperature sensor 1, the differential pressure sensor 7 and the room temperature sensor 2 are all connected with the parameter acquisition box 11, the electric regulating valve 5 and the circulating water pump 8 on the loop 4 are all connected with the controller 10, the input end of the computer 12 is connected with the parameter acquisition box 11, the output end of the computer 12 is connected with the controller 10, and further the controller 10 is connected with the circulating water pump 8 through a frequency converter 9. The computer transmits the control quantity to the controller, the controller converts the control quantity of the electric regulating valve into an analog signal and then directly regulates and controls the opening of the electric regulating valve, the circulating water pump is regulated and controlled by the frequency converter, so that the water supply amount on each loop is matched with the requirement of the tail end load, after a period of time, the water temperature sensors monitor the return water temperature change of each loop one by one, the differential pressure sensor detects the differential pressure between the water supply pipe and the return water pipe of the main loop, the parameter acquisition box automatically acquires and transmits the data parameters to the computer, the computer performs data analysis and calculation and then outputs a control instruction to the controller, the circulation mode plays a role in controlling the water supply amount of the total loop and each loop in real time, so that the regulation is quicker and more sensitive, the control is more accurate, and the intelligence and controllability of a heat supply system are improved.
Meanwhile, the frequency converter adjusts and controls the circulating water pump to realize water pump frequency conversion adjustment, the water pump frequency conversion adjustment is combined during water supply adjustment and distribution to realize 'supply on demand' of the total loop water supply, hydraulic balance and thermal balance are guaranteed, and unnecessary energy loss of a heat supply system is reduced.
In conclusion, the invention can acquire, analyze and process the parameters of water temperature, room temperature, pressure difference and the like on the main loop and each loop in time, control the water supply quantity of the main loop and each loop according to the analysis result, control the water supply quantity in real time by adopting a dynamic adjustment method, and achieve hydraulic dynamic balance, thereby ensuring that users on each loop can obtain required heat, ensuring the heat supply effect, still realizing the heat balance of the heat supply system under the condition of different heat load states, effectively reducing the energy consumption of the heat supply system in transmission and distribution, and obtaining good energy-saving effect.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A hydraulic balance adjusting method for isothermal difference variable flow is characterized in that: the method comprises the following steps:
s1, data acquisition: indoor temperature for users on each loopt s Water supply temperature of the main loopt g Return water temperature of each loopt i And return water temperature of the main loopt h Collecting the pressure difference delta between the water supply pipe and the water return pipe of the total looppCollecting the data parameters;
s2, data processing: calculating the room temperature deviation delta of users on each loopt s Temperature difference delta between water supply and water return of main looptAnd supply and return water temperature difference delta of each loopt i ；
S3, analysis and comparison: analyzing and comparing the data parameters acquired in the step S1 with the data results obtained in the step S2 to obtain the control quantity of the required total loop water supply and the control quantity of each loop water supply;
step S3 specifically includes the following steps:
s31, when the design heat loads of users on each loop are consistent, if the temperature difference delta of supply and return water of the loop is the samet i Temperature difference delta of supply and return water less than total looptIf the water supply quantity of the loop is excessive, the water supply quantity of the loop needs to be reduced; if the temperature difference delta between the supply water and the return water of the loopt i Temperature difference delta between supply water and return water larger than total looptIf the water supply quantity of the loop is insufficient, the water supply quantity of the loop needs to be increased; if the temperature difference delta between the supply water and the return water of the loopt i Equal to supply and return water temperature difference delta of the total looptIf so, indicating that the water supply amount of the loop meets the requirement;
when the design heat loads of the users on each loop are not consistent, if the indoor temperature deviation delta of the users on the loop is differentt s If the water supply quantity is less than zero, the water supply quantity of the loop is insufficient, and the water supply quantity of the loop needs to be increased; if indoor temperature deviation delta of users on loopt s If the water supply quantity is larger than zero, the water supply quantity of the loop is excessive, and the water supply quantity of the loop needs to be reduced; if indoor temperature deviation delta of users on loopt s If the water supply quantity is equal to zero, the water supply quantity of the loop meets the requirement;
s32, if the temperature difference delta of the water supply and return of each loopt i Supply and return water temperature difference delta larger than total looptIf the total loop water supply is insufficient, the total loop water supply needs to be increased; if the temperature difference delta between the supply water and the return water of each loopt i Are all less than the supply-return water temperature difference delta of the total looptIf the total loop water supply is excessive, the total loop water supply needs to be reduced;
s4, adjusting and controlling: adjusting and controlling the total loop water supply amount according to the control amount of the total loop water supply amount obtained in the step S3 to ensure the pressure difference delta between the water supply pipe and the water return pipe of the total looppKeeping the temperature stable, adjusting and controlling the water supply quantity of each loop according to the control quantity of the water supply quantity of each loop obtained in the step S3 to ensure that the temperature difference delta of the supplied and returned water of each loop ist i Maintaining uniform or satisfactory indoor temperature for subscribers on each loopt s And (4) requiring.
2. The isothermal differential variable flow hydraulic balance adjustment method according to claim 1, characterized in that: when the thermal load of the user on each loop dynamically changes, step S3 further includes the following steps: if the pressure difference delta between the water supply pipe and the water return pipe of the main loop ispIf the water supply quantity of the total loop is increased, the water supply quantity of the total loop is excessive, and the water supply quantity of the total loop needs to be reduced; if the pressure difference delta between the water supply pipe and the water return pipe of the main loop ispIf the water supply quantity of the total loop is reduced, the water supply quantity of the total loop is insufficient, and the water supply quantity of the total loop needs to be increased; if the pressure difference delta between the water supply pipe and the water return pipe of the main loop ispNo change indicates a total loop water supply balance.
3. The method for regulating hydraulic balance of isothermal differential variable flow according to any one of claims 1-2, characterized in that: in the step S2, in step S2,t n for the indoor design temperature of the users on each loop, the indoor temperature deviation delta of the users on each loopt s Temperature difference delta between water supply and water return of main looptAnd supply and return water temperature difference delta of each loopt i The calculation method comprises the following steps: deltat s =t s -t n ，Δt=t g -t h ，Δt i =t g -t i 。
4. The isothermal differential variable flow hydraulic balance adjustment method according to claim 3, characterized in that: in step S2, the collected data parameters are converted into digital signals by a control device for data processing, and in step S4, the control device controls the loop water supply amount through an electric regulating valve, and the control device controls the total loop water supply amount through a frequency converter.
5. The method of claim 4The equal temperature difference variable flow hydraulic balance adjusting method is characterized by comprising the following steps of: in step S1, the temperature of the water supply to the overall loopt g Return water temperature of each loopt i And the return water temperature of the total loopt h The time interval for acquiring the data parameter is determined according to the longest water circulation period of the loop.
6. An adjusting system based on the isothermal differential variable flow hydraulic balance adjusting method according to any one of claims 1-5, comprising a total loop and a plurality of loops, and is characterized in that: the plurality of loops are respectively connected with the main loop in parallel, each loop is provided with an electric regulating valve and a water temperature sensor, a room temperature sensor is arranged in a user room on each loop, a water supply pipe and a water return pipe of the main loop are provided with water temperature sensors, the water supply pipe of the main loop is connected with one end of a differential pressure sensor, and the other end of the differential pressure sensor is connected with the water return pipe of the main loop; the temperature sensor is characterized by further comprising a control device, one end of the control device is connected with the electric regulating valve, and the other end of the control device is connected with the water temperature sensor, the room temperature sensor and the differential pressure sensor.
7. The isothermal differential variable flow hydraulic balance adjustment system according to claim 6, characterized in that: the main loop also comprises a heat source and a circulating water pump, one end of the heat source is connected with a water supply pipe of the main loop, the other end of the heat source is connected with a water return pipe of the main loop, and the circulating water pump is arranged on a connecting pipeline.
8. Isothermal differential variable flow hydraulic balance regulating system according to claim 7, characterized in that: the control device comprises a parameter acquisition box, a controller and a computer, wherein the water temperature sensor, the differential pressure sensor and the room temperature sensor are all connected with the parameter acquisition box, the electric regulating valve on the loop and the circulating water pump are all connected with the controller, the input end of the computer is connected with the parameter acquisition box, and the output end of the computer is connected with the controller.
9. Isothermal differential variable flow hydraulic balance regulating system according to claim 8, characterized in that: the controller is connected with the circulating water pump through a frequency converter.
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