CN115076766A - Operation method for hydraulic balance of heat supply pipe network - Google Patents
Operation method for hydraulic balance of heat supply pipe network Download PDFInfo
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Abstract
The invention relates to the technical field of heating systems, in particular to an operation method for hydraulic balance of a heating pipe network, which comprises the steps of establishing a primary network distributed heating transmission and distribution system; a whole network distributed transmission and distribution scheme; the establishment of the primary network distributed heat supply transmission and distribution system comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heat supply system; operation adjustment; the whole network distributed transmission and distribution scheme comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; and (5) operation adjustment. According to the operation method for the hydraulic balance of the heat supply pipe network, the distributed circulating water pump, the wireless pressure sensor, the remote transmission system and the remote data management system are arranged, the control platform based on data acquisition is arranged, the platform can automatically adjust the operation frequency of the water pump according to outdoor heat load change, variable flow regulation is carried out, hydraulic imbalance of a secondary network is prevented, the distributed conveying system can stably and efficiently operate, and the heat supply efficiency is improved.
Description
Technical Field
The invention relates to the technical field of heating systems, in particular to an operation method for hydraulic balance of a heating pipe network.
Background
Along with the continuous development of central heating, the central heating area is continuously increased, the design age of the main pipe network in old cities is earlier, the rapid development of cities enables the original pipe network to fail to meet the operation requirement, and the general buildings in old cities are dense, so that the pipe network is difficult to transform or has no condition. The actual operation effect is relatively poor, and the water conservancy is imbalance seriously, for satisfying the operation demand of the most unfavorable station, improves the main circulating water pump lift, causes the higher and waste of the energy of pipe network operating pressure.
The distributed heat supply transmission and distribution system has the advantages that: firstly, the hydraulic working condition of a primary network can be effectively improved, each heat supply network substation adjusts the operation parameters of the distributed water pump according to the actual operation requirement, and the problems of large local operation resistance, serious hydraulic imbalance and the like of an old pipe network are solved; and secondly, the lift of the heat source main circulating water pump can be effectively reduced, the installed capacity of the water pump is reduced, a remarkable electricity-saving effect is achieved, and the integral operation pressure of a pipe network can be remarkably reduced. Therefore, in recent years, the distributed heat supply transmission and distribution system becomes an important direction for improving the efficiency of the centralized heat supply transmission and distribution link. At present, a distributed transmission and distribution heating system is mostly limited to be applied among heat sources, a primary network and heating power stations. The traditional transportation mode is basically maintained on a secondary network, a hot entrance (building) and an indoor hot user system. Therefore, the circulating water pump of the secondary network (the heating power station) is still set by adopting the traditional design method, the near-section heat consumer of the secondary network still has excessive qualification pressure heads, and the hydraulic imbalance of the secondary network still exists. Therefore, the means for solving the hydraulic balance of the secondary network still adds various regulating valves to carry out throttling regulation, so far, the technical advancement of the distributed transmission and distribution system is not fully reflected on the secondary network and a heat consumer system, and therefore an operation method related to the hydraulic balance of the heat supply network is provided to solve the problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an operation method for the hydraulic balance of a heat supply pipe network, and solves the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: an operation method related to hydraulic balance of a heat supply pipe network comprises the steps of establishing a primary network distributed heat supply transmission and distribution system; a whole network distributed transmission and distribution scheme;
the establishment of the primary network distributed heat supply transmission and distribution system comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; operation adjustment;
the whole network distributed transmission and distribution scheme comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; operation adjustment; determining a scheme of a distributed transmission and distribution system; a distributed transmission and distribution system design principle;
the operation method related to the water balance of the heat supply pipe network comprises a distributed circulating water pump, a wireless pressure sensor, a remote transmission system and a remote data management system, wherein the remote transmission system collects data information of all control devices and sensing devices in a wired or wireless mode through a 4G network of an operator, a highly reliable LORA technology and a field bus technology based on in-station control, then sends the data to a monitoring platform in a unified mode through GPRS, 3G, 4G, VPN or broadband and the like, and the remote data management system collects data information of all cells in a region and analyzes, processes, stores and displays the data information.
The upper computer system of the remote data management system adopts a B/S architecture or a C/S architecture, data are all stored in the database system, data display adopts a webpage form and is matched with visual display of various graphs, curves and the like, the system can be directly logged in through a browser under the condition that other computers are not provided with any software, and relevant data can be checked through corresponding user names and passwords.
Preferably, the determination of the zero pressure point in the establishment of the primary grid distributed heat supply transmission and distribution system is specifically as follows: in a water pressure diagram of a distributed heat supply transmission and distribution system, a water supply pressure line and a water return pressure line of a main line have intersection points, and the water supply pressure after the intersection points is lower than the corresponding water return pressure.
Preferably, the analysis of the hydraulic working condition of the heating system in the establishment of the primary grid distributed heating transmission and distribution system specifically comprises: the distributed water pump is selected according to the circulating flow and the lift born by the distributed water pump, the flow is determined according to the heat supply area and the heat index born by the water pump, and the lift is determined by taking a zero pressure point as a calculation starting point according to the circulating resistance of a main line and branch lines to be overcome by the water pump.
Preferably, the operation regulation during the establishment of the primary grid distributed heat supply transmission and distribution system is specifically as follows: an advanced automatic control system based on water pump variable frequency speed regulation optimized operation is researched and developed to ensure stable and efficient operation of a distributed heat supply transmission and distribution system.
Preferably, the determination of the zero pressure point in the full-network distributed transmission and distribution scheme specifically includes: in the whole network distribution system, the heat source main circulating water pump only undertakes the heat medium circulation inside the heat source, and the external circulating flow is provided by the distributed user pump, and can be selected in the middle of the pipe network or other parts according to the requirement.
Preferably, the analysis of the hydraulic working condition of the heating system in the whole network distributed transmission and distribution scheme specifically comprises: the flow and the lift of the distributed water pump are determined according to the heat index and the area of a user, the lift takes a zero pressure point as a starting point, and the pressure loss of a main line and branch lines is determined.
Preferably, the operation adjustment in the whole-network distributed transmission and distribution scheme is specifically: in the primary network heat supply adjusting process, a quality parallel adjusting mode is usually adopted according to different outdoor temperatures.
Preferably, the determination of the distributed transmission and distribution system scheme in the whole-network distributed transmission and distribution scheme specifically includes: adopting Geopipe hydraulic calculation software to carry out pipe network modeling simulation calculation, determining water pump model selection parameters through multi-working-condition simulation analysis, and according to the Torray law:
wherein: g i -flow rate of each pipe section of the heating system, t/h;
ΔH i pressure drop loss of each pipe section of the heating system;
eta-water pump efficiency;
N 0- the theoretical total power of the circulating water pump, kW, is calculated by the Terlangen law;
n total power of circulating water pump, Kw.
Preferably, the design principle of the distributed transmission and distribution system in the whole network distributed transmission and distribution scheme is specifically as follows: selecting the type of the distributed water pump: the flow and the lift of the distributed water pump are selected to meet the requirements under various working conditions;
the outlet valve of the water pump is arranged: in the variable-frequency multi-pump combined operation, the working characteristic curve of the water pump and the resistance curve of the pipe network also change at any time, the change of the working point of the water pump needs to be mastered in time in the actual operation process, and necessary regulation and control measures are taken; a check valve at the outlet of the water pump is arranged;
bypass state of the pipeline: when the whole pipeline is operated, the bypass network of any main pipeline or branch pipeline is ensured to be in a closed state.
The invention provides an operation method for water power balance of a heat supply pipe network, which has the following beneficial effects:
1. according to the operation method for the hydraulic balance of the heat supply pipe network, the distributed circulating water pump, the wireless pressure sensor, the remote transmission system and the remote data management system are arranged, the control platform based on data acquisition is arranged, the platform can automatically adjust the operation frequency of the water pump according to outdoor heat load change, variable flow regulation is carried out, hydraulic imbalance of a secondary network is prevented, the distributed conveying system can stably and efficiently operate, and the heat supply efficiency is improved.
2. According to the operation method for the hydraulic balance of the heat supply pipe network, a remote data management system collects data information of all control equipment and sensing equipment in a wired or wireless mode through a network, a high-reliability LORA technology and a field bus technology based on in-station control, then sends the data to a monitoring platform in a unified mode through GPRS (general packet radio service), 3G (third generation telecommunication), 4G, VPN or broadband and the like, the data can be fed back quickly, the timeliness of the data is guaranteed, in addition, the data are displayed through a webpage, a user can log in a system to check, and the operation method is more real and transparent.
Drawings
FIG. 1 is a schematic diagram of a system architecture according to the present invention;
FIG. 2 is a schematic diagram of the construction of the distributed pump design of the present invention;
FIG. 3 is a hydraulic diagram of a distributed pump design of the present invention;
FIG. 4 is a hydraulic diagram of a conventional design;
FIG. 5 is a hydraulic diagram before modification;
FIG. 6 is a water pressure diagram after the modification of the present invention;
FIG. 7 is a schematic diagram of the system flow of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 and 7, the present invention provides a technical solution: an operation method related to hydraulic balance of a heat supply pipe network comprises the steps of establishing a primary network distributed heat supply transmission and distribution system; a whole network distributed transmission and distribution scheme;
the establishment of the primary network distributed heat supply transmission and distribution system comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; operation adjustment;
the whole network distributed transmission and distribution scheme comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; operation adjustment; determining a scheme of a distributed transmission and distribution system; a distributed transmission and distribution system design principle;
the operation method related to the water balance of the heat supply pipe network consists of a distributed circulating water pump, a wireless pressure sensor, a remote transmission system and a remote data management system, wherein the remote transmission system collects data information of all control equipment and sensing equipment in a wired or wireless manner through a 4G network of an operator, a highly reliable LORA technology and a field bus technology based on in-station control, then uniformly transmits the data to a monitoring platform in a GPRS (general packet radio service), 3G, 4G, VPN or broadband manner, and the remote data management system collects the data information of all cells in the area, and analyzes, processes, stores and displays the data information.
The upper computer system of the remote data management system adopts a B/S architecture or a C/S architecture, data are all stored in the database system, data display adopts a webpage form and is matched with visual display of various graphs, curves and the like, the system can be directly logged in through a browser under the condition that other computers are not provided with any software, and relevant data can be checked through corresponding user names and passwords.
Referring to fig. 1, the determination of the zero pressure point in the establishment of the distributed heating transmission and distribution system of the primary grid is specifically as follows: in a water pressure diagram of the distributed heat supply transmission and distribution system, a water supply pressure line and a water return pressure line of a main line have intersection points, the water supply pressure after the intersection points is lower than the corresponding water return pressure, a heat source main circulating water pump only needs to overcome hot water circulating resistance inside a heat source and main line circulating resistance close to the heat source, and the circulating resistance of the main line and branch lines far away from the heat source (close to a user) is overcome by a distributed water pump arranged on a heat supply network substation.
Referring to fig. 1, the hydraulic working condition analysis of the heating system in the establishment of the primary grid distributed heating transmission and distribution system specifically includes: the distributed water pump is selected according to the borne circulation flow and the borne lift, the flow is determined according to the heat supply area and the heat index borne by the water pump, the lift takes a zero pressure point as a calculation starting point and is determined according to the circulation resistance of a main line and a branch line which need to be overcome by the water pump, the type selection of the water pump is determined not only based on design working conditions but also by comprehensively considering typical working conditions in actual operation, and powerful hydraulic simulation analysis software is adopted for modeling and primary working condition simulation calculation analysis is needed.
Referring to fig. 1, the operation adjustment in the establishment of the primary grid distributed heat supply transmission and distribution system specifically includes: due to the reasons that the user heat load statistics has errors, the actual operation working condition of the pipe network is different from the theoretical working condition and the like, the flow and the lift of the distributed water pump can not completely meet the engineering design requirements, and the problem of hydraulic imbalance of uneven flow distribution of each heat supply network substation still exists in the actual operation, in addition, the quality and the quantity of one-time network operation are usually adjusted according to the outdoor temperature change, in the initial and final stages of heat supply, the reduction range of the circulation flow of the heat supply network is large, the variable frequency operation of the distributed water pump still can not meet the operation requirement, an advanced automatic control system based on the variable frequency speed regulation and optimization operation of the water pump is developed to ensure the stable and efficient operation of the distributed heat supply transmission and distribution system, the system can automatically optimize and adjust the output power of each distributed water pump according to the heat load change of each heat supply network substation of the system, and performs variable flow regulation to accurately adapt to heat supply requirements.
Referring to fig. 1, the determination of the zero pressure point in the whole network distributed transmission and distribution scheme specifically includes: in the distributed transmission and distribution system, the condition that the water supply pressure is lower than the corresponding water return pressure exists, namely, in a water pressure diagram, the water supply and return pressure lines have intersection points, in the whole network distributed transmission and distribution system, the heat source main circulating water pump only undertakes heat medium circulation inside a heat source, the external circulating flow is provided by a distributed user pump, and the water supply main circulating water pump can be selected in the middle of a pipe network or other parts according to requirements.
Referring to fig. 1, the hydraulic working condition analysis of the heating system in the whole network distributed transmission and distribution scheme specifically includes: the flow and the lift of the distributed water pump are determined according to the heat index and the area of a user, the lift takes a zero pressure point as a starting point, the pressure loss of a main line and a branch line is determined, and when the model of the water pump is selected, different operation conditions are simulated, so that advanced hydraulic calculation software is required to be used for calculation.
Referring to fig. 1, the operation adjustment in the full-network distributed transmission and distribution scheme specifically includes: in the process of selecting the distributed transmission and distribution system, due to the fact that user heat load statistics has errors, the actual operation working condition and the ideal working condition of a pipeline have difference and other factor influences, the flow and the lift of the distributed transmission and distribution system cannot completely meet engineering design requirements, the system can be caused to appear in the process of actual operation, the flow distribution of the system is unbalanced, hydraulic imbalance is caused, in the process of regulating heat of a primary network, the mode of regulating the system according to different outdoor temperatures by adopting quality is usually adopted, when the outdoor temperature is higher in the early stage and the later stage of heat supply, the circulating water quantity is reduced, and the power frequency operation of a water pump cannot meet the operation requirements.
Referring to fig. 2-4, the scheme of the distributed transmission and distribution system in the full-network distributed transmission and distribution scheme is specifically determined as follows: adopt geoppie hydraulic calculation software to carry out the pipe network modeling analog computation, through multiplex condition analog analysis, confirm the water pump lectotype parameter, set up the frequency conversion water pump and keep original governing valve at the pipe network outlet pipe, when adopting the water pump operation, the valve should be in full open position, adopts the heat source pump to set up alone, the design of heat supply network pump and user pump unification, according to the law of turnkey:
wherein: g i -flow rate of each pipe section of the heating system, t/h;
ΔH i heating systemLoss of pressure drop in each pipe section;
eta-water pump efficiency;
N 0- the theoretical total power of the circulating water pump, kW, is calculated by the Terlangen law;
n total power of circulating water pump, Kw.
The actual saving amount for reducing the total power consumption is calculated as the sum of the branch throttle delta Hi, and compared with the traditional design scheme, the total power of the circulating water pump can be reduced by more than 30% by changing the design scheme.
The design principle of the distributed transmission and distribution system in the whole network distributed transmission and distribution scheme is as follows: selecting the type of the distributed water pump: the flow and the lift of the distributed water pump are selected to meet the requirements under various working conditions; when the power plant lift is fixed, the operation conditions under different flows are simulated, so that the water pumps working in the high-efficiency area are selected according to the flow and the qualification pressure heads at the user, and the distributed pumps are made to adapt to the working requirements under various working conditions.
Outlet valve of the water pump is arranged: in the variable-frequency multi-pump combined operation, the working characteristic curve of the water pump and the resistance curve of a pipe network also change at any time, the change of the working point of the water pump needs to be mastered in time in the actual operation process, necessary regulation measures are taken, in the actual operation, the pump is generally used for valve regulation in a distributed mode, except for adopting the variable-frequency regulation of the water pump, if the original electric regulating valve can be reserved, the operation regulation under different working conditions can move along with the zero pressure difference point, the regulation can also be carried out by using the regulating valve, in the general state, the valve is adopted for regulation before the zero pressure difference point, and the pump is adopted for regulation after the zero pressure difference point;
the check valve at the outlet of the water pump is arranged, so that when the water pump is started, the check valve can protect the water pump without closing the outlet valve of the water pump; when the pressure of the return water is higher than the pressure of the supplied water, the situation that the water pump is insufficient in lift to cause local short-circuit circulation and the user is not hot is prevented.
Bypass state of the pipeline: when the whole pipeline is operated, the bypass network of any main pipeline or branch pipeline is ensured to be in a closed state.
Example 1: referring to fig. 5 and 6, before the distributed heat supply transmission and distribution system is modified, in order to ensure sufficient resource pressure heads of the terminal heat supply network substations, the heat source main circulation water pump must be provided with a higher lift, because the terrain of the main heat source in the modified market is all at a high position, the operation at a lower point of the terrain is close to the design pressure of 1.6MPa, and the operation pressure of the whole pipe network is higher,
taking a transformation unit as an example, the pressure difference between an inlet and an outlet of a heat source initial station is 0.95MPa, the internal resistance loss of the heat source is 15mH2O, and the lift of a main circulating water pump is 110 m. The total circulating water amount of the heat source is 7000t/h, and the efficiency of the water pump is calculated according to 75%. Calculating the power of the water pump:
wherein: the power of an N-water pump shaft kW;
m-water pump lift;
eta-water pump efficiency;
the operation mode of a centralized heat source single-group water pump is adopted, the total power of the water pump is 2780Kw, and if the operation mode of multiple pumps in parallel is adopted, the total power of the water pump needs to be increased.
The hydraulic pressure diagram after transformation is analyzed and obtained, after the distributed heat supply transmission and distribution system is transformed, the lift of a heat source main circulating water pump can be greatly reduced, so that the installation or operation power of the water pump is reduced, meanwhile, the operation pressure of the whole heat supply network is reduced, and the method is particularly important for improving the operation safety of a pipe network at a low point of the terrain.
The pressure difference between an inlet and an outlet of a first station of the power plant is 0.3MPa, and the resistance loss in the station is 15mH2O, so that the lift of a main heat source circulating water pump is 45m, the circulating flow is kept 7000t/h unchanged, and the power of the main circulating water pump of the power plant is 1150 KW.
The total power of a water pump installation of the distributed heat supply transmission and distribution system is as follows:
through GeoPipe software simulation calculation, the resource pressure of each heat supply network substation is determined, and the total installed power of each distributed water pump is calculated to be 790 kW.
After the improvement is implemented, the total power of the water pump of the heat supply network is reduced to 1940KW from 2780KW, and the amplitude is reduced by 30%. The running pressure of the pipe network is reduced by 0.3 MPa.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An operation method about hydraulic balance of a heat supply pipe network is characterized in that: the method comprises the steps of establishing a primary network distributed heat supply transmission and distribution system; a whole network distributed transmission and distribution scheme;
the establishment of the primary network distributed heat supply transmission and distribution system comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; operation adjustment;
the whole network distributed transmission and distribution scheme comprises the following steps: determining a zero pressure point; analyzing the hydraulic working condition of the heating system; operation adjustment; determining a scheme of a distributed transmission and distribution system; designing principles of a distributed transmission and distribution system;
the operation method related to the water balance of the heat supply pipe network comprises a distributed circulating water pump, a wireless pressure sensor, a remote transmission system and a remote data management system, wherein the remote transmission system collects data information of all control devices and sensing devices in a wired or wireless mode through a 4G network of an operator, a highly reliable LORA technology and a field bus technology based on in-station control, then sends the data to a monitoring platform in a unified mode through GPRS, 3G, 4G, VPN or broadband and the like, and the remote data management system collects data information of all cells in a region and analyzes, processes, stores and displays the data information.
The upper computer system of the remote data management system adopts a B/S architecture or a C/S architecture, data is completely stored in a database system, data display adopts a webpage form and is matched with visual display of various graphs, curves and the like, and the system can be directly logged in through a browser under the condition that other computers are not provided with any software, and relevant data can be checked by means of corresponding user names and passwords.
2. The operation method of claim 1, wherein the operation method comprises the following steps: the determination of the zero pressure point in the establishment of the primary network distributed heat supply transmission and distribution system is specifically as follows: in a water pressure diagram of a distributed heat supply transmission and distribution system, a water supply pressure line and a water return pressure line of a main line have intersection points, and the water supply pressure after the intersection points is lower than the corresponding water return pressure.
3. The operation method of claim 1, wherein the operation method comprises the following steps: the hydraulic working condition analysis of the heat supply system in the establishment of the primary network distributed heat supply transmission and distribution system specifically comprises the following steps: the distributed water pump is selected according to the borne circulation flow and the borne lift, the flow is determined according to the heat supply area and the heat index borne by the water pump, the lift is determined by taking a zero pressure point as a calculation starting point and according to the circulation resistance of a main line and a branch line which need to be overcome by the water pump.
4. The operation method of claim 1, wherein the operation method comprises the following steps: the operation regulation in the establishment of the primary network distributed heat supply transmission and distribution system is specifically as follows: an advanced automatic control system based on water pump variable frequency speed regulation optimized operation is researched and developed to ensure stable and efficient operation of a distributed heat supply transmission and distribution system.
5. The operation method of claim 1, wherein the operation method comprises the following steps: the determination of the zero pressure point in the whole network distributed transmission and distribution scheme specifically comprises the following steps: in the network distributed transmission and distribution system, the heat source main circulating water pump only undertakes heat medium circulation inside the heat source, and the external circulating flow is provided by the distributed user pump, and can be selected in the middle of a pipe network or other parts according to requirements.
6. The operation method of claim 1, wherein the operation method comprises the following steps: the hydraulic working condition analysis of the heating system in the whole network distributed transmission and distribution scheme specifically comprises the following steps: the flow and the lift of the distributed water pump are determined according to the heat index and the area of a user, the lift takes a zero pressure point as a starting point, and the pressure loss of a main line and branch lines is determined.
7. The operation method of claim 1, wherein the operation method comprises the following steps: the operation regulation in the whole network distributed transmission and distribution scheme is specifically as follows: in the primary network heat supply adjusting process, a quality parallel adjusting mode is usually adopted according to different outdoor temperatures.
8. The operation method of claim 1, wherein the operation method comprises the following steps: the scheme of the distributed transmission and distribution system in the whole network distributed transmission and distribution scheme is specifically determined as follows: adopting Geopipe hydraulic calculation software to carry out pipe network modeling simulation calculation, determining water pump model selection parameters through multi-working-condition simulation analysis, and according to the Torray law:
wherein: g i -flow rate of each pipe section of the heating system, t/h;
ΔH i pressure drop loss of each pipe section of the heating system;
eta-water pump efficiency;
N 0- the theoretical total power of the circulating water pump, kW, is calculated by the Terlangen law;
n total power of circulating water pump, Kw.
9. The operation method of claim 1, wherein the operation method comprises the following steps: the design principle of the distributed transmission and distribution system in the whole network distributed transmission and distribution scheme is as follows: selecting the type of the distributed water pump: the flow and the lift of the distributed water pump are selected to meet the requirements under various working conditions;
the outlet valve of the water pump is arranged: in the variable-frequency multi-pump combined operation, the working characteristic curve of the water pump and the resistance curve of the pipe network also change at any time, the change of the working point of the water pump needs to be mastered in time in the actual operation process, and necessary regulation and control measures are taken; a check valve at the outlet of the water pump is arranged;
bypass state of the pipeline: when the whole pipeline is operated, the bypass network of any main pipeline or branch pipeline is ensured to be in a closed state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679988.3A CN115076766A (en) | 2022-06-16 | 2022-06-16 | Operation method for hydraulic balance of heat supply pipe network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210679988.3A CN115076766A (en) | 2022-06-16 | 2022-06-16 | Operation method for hydraulic balance of heat supply pipe network |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002106860A (en) * | 2000-09-28 | 2002-04-10 | Kajima Corp | Double tube heat supply system for a plurality of heat sources, and its pressure control method |
| CN101975417A (en) * | 2010-11-22 | 2011-02-16 | 哈尔滨工业大学 | Method for regulating critical zero differential pressure state of distributed water pump variable flow heat supply system |
| CN102913991A (en) * | 2012-06-11 | 2013-02-06 | 北京金房暖通节能技术有限公司 | Central heating distributive frequency conversion two-stage pump system energy-saving control method |
| CN102944034A (en) * | 2012-11-28 | 2013-02-27 | 哈尔滨工业大学 | Multistage distributed water pump heat supply system and design method thereof |
| CN205783241U (en) * | 2016-05-20 | 2016-12-07 | 宋云鹏 | A kind of thermodynamic heating system |
| WO2017185914A1 (en) * | 2016-04-25 | 2017-11-02 | 韩磊 | Electric automobile energy monitoring and swapping network in remote monitoring of cloud computing network architecture |
| WO2018000515A1 (en) * | 2016-07-01 | 2018-01-04 | 顺德职业技术学院 | Energy-saving control method for adaptive variable-frequency heat pump hot water heating system |
| CN111578368A (en) * | 2020-04-23 | 2020-08-25 | 李明甲 | Heat supply pipe network hydraulic regulation and control system and intelligent control and heat supply charging method thereof |
-
2022
- 2022-06-16 CN CN202210679988.3A patent/CN115076766A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002106860A (en) * | 2000-09-28 | 2002-04-10 | Kajima Corp | Double tube heat supply system for a plurality of heat sources, and its pressure control method |
| CN101975417A (en) * | 2010-11-22 | 2011-02-16 | 哈尔滨工业大学 | Method for regulating critical zero differential pressure state of distributed water pump variable flow heat supply system |
| CN102913991A (en) * | 2012-06-11 | 2013-02-06 | 北京金房暖通节能技术有限公司 | Central heating distributive frequency conversion two-stage pump system energy-saving control method |
| CN102944034A (en) * | 2012-11-28 | 2013-02-27 | 哈尔滨工业大学 | Multistage distributed water pump heat supply system and design method thereof |
| WO2017185914A1 (en) * | 2016-04-25 | 2017-11-02 | 韩磊 | Electric automobile energy monitoring and swapping network in remote monitoring of cloud computing network architecture |
| CN205783241U (en) * | 2016-05-20 | 2016-12-07 | 宋云鹏 | A kind of thermodynamic heating system |
| WO2018000515A1 (en) * | 2016-07-01 | 2018-01-04 | 顺德职业技术学院 | Energy-saving control method for adaptive variable-frequency heat pump hot water heating system |
| CN111578368A (en) * | 2020-04-23 | 2020-08-25 | 李明甲 | Heat supply pipe network hydraulic regulation and control system and intelligent control and heat supply charging method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 李志玲等: "基于PLC和力控组态软件的热网监控系统的设计", 科技展望, no. 31, pages 130 * |
| 李永安等: "寒冷地区集中供热输配系统节能研究", 山东建筑大学学报, no. 04, pages 330 - 333 * |
| 王鹏飞等: "动力分布式二级泵供热系统在环状管网的应用分析", 绿色科技, no. 04, pages 185 - 189 * |
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