CN101943440B - Water replenishing and pressure determining system for multi-heat source annular heat supply pipe network and method for determining pressure of constant pressure point - Google Patents
Water replenishing and pressure determining system for multi-heat source annular heat supply pipe network and method for determining pressure of constant pressure point Download PDFInfo
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- CN101943440B CN101943440B CN 201010299490 CN201010299490A CN101943440B CN 101943440 B CN101943440 B CN 101943440B CN 201010299490 CN201010299490 CN 201010299490 CN 201010299490 A CN201010299490 A CN 201010299490A CN 101943440 B CN101943440 B CN 101943440B
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Abstract
The invention discloses a water replenishing and pressure determining system for a multi-heat source annular heat supply pipe network and a method for determining the pressure of a constant pressure point thereof. The invention has the technical characteristic that a pressure determining and water replenishing manner of determining pressure at one point and replenishing water at multiple points is adopted, i.e. a pressure signal measuring device is arranged at the inlet of a circulating water pump of a basic heat source of a multi-heat source annular pipe network heat supply system. In the invention, because the multi-heat source annular network heat supply system only has one constant pressure point and the pressure value of the constant pressure point can ensure that the system can not be emptied and vaporized under all operation conditions and non-operation conditions, under different operation conditions, the fluctuation range of the pressure value of the constant pressure point can be constant, and the pressure value does not need to be reset according to the variation of the operation conditions, thereby being convenient for operation and management and effectively avoiding overpressure or underpressure of the system because the pressure setting of an auxiliary constant pressure point can not adapt to the variation of the operation conditions in the multi-point water replenishing and multi-point pressure determining measure.
Description
Technical field
The present invention relates to heating system, relate in particular to many thermals source looping network heating system.
Background technology
In service in heating system, it is inevitable that system's dehydration is leaked.Can not in time be replenished if the dehydration of system is leaked, the normal circulation of system will be destroyed, and affects heating effect.
List heat supply system, the common practices of constant pressure supply water system is: a water-supply and pressure-stabling point only is set, and this constant pressure supply water point operated by rotary motion is in the porch of water circulating pump (system's operation pressure minimum point); To fluctuation range of pressure setting of constant pressure supply water point, system is satisfied do not turn, unvaporized requirement.Prescribe a time limit to the lower of pressure oscillation scope when the pressure decreased of pressurization point, small pump starts moisturizing; Prescribe a time limit when pressurization point pressure is increased to the upper of pressure oscillation scope, small pump stops moisturizing.
And for many thermals source looping network heating system, because pipe network is larger, fluid loss is often also larger, adopts " some moisturizings " can not satisfy the moisturizing requirement as a rule.
With the immediate prior art of the present invention be at " the China Reconstructs's information heating and refrigerating " second phase in 2006 disclosed " the again understanding of the many heat sources networkings of a heating system operation " literary composition.Many heat sources networking operation heating system water-supply and pressure-stablings measure of " multiple spot moisturizing, multiple spot level pressure " is disclosed in this article, specifically, it is exactly the import and export bypass pressure-measuring pipe at each heat-source Cycles water pump, on the bypass pressure-measuring pipe pressure sensor is installed, by the control to the system water supplement amount, make the pressure of the pressure sensor on the bypass pressure-measuring pipe remain the static pressure line value.This water-supply and pressure-stabling technology can satisfy the requirement of many heat sources networkings heating system water-supply and pressure-stabling under a certain specific operation, but also have the following disadvantages: for many heat sources networkings heating system, start the different of order and quantity according to thermal source, can be divided into multiple operating condition.Under different operating conditions, larger variation often occurs in flow system flow, thereby cause system pressure to distribute larger variation occurs.Therefore, under different operating conditions, be arranged on the force value that the pressure sensor on the bypass pipe experiences and change, can not all maintain the static pressure line value of system.Therefore, " the multiple spot bypass with value level pressure " based on " multiple spot moisturizing, multiple spot level pressure " measure that propose in the document installs, and may produce following problem: under a certain operating mode, the operation of water-supply and pressure-stabling device can guarantee the consistent of system's dehydration and moisturizing; When operating condition changes, because the force value of the pressurization point that arranges on the bypass pipe will change, if still by the original pressure control small pump operation of setting, then can cause the inconsistent of system water supplement and dehydration, and then make pipe network generation superpressure or under-voltage phenomenon, affect the normal operation of system.
Summary of the invention
The present invention is for solving the deficiency of above-mentioned many thermals source looping network heating system " multiple spot moisturizing, multiple spot level pressure " technology, and a kind of improved water-supply and pressure-stabling system is provided, and makes the operational management of many thermals source looping network heating system convenient, system's security of operation.
The present invention provides the pressurization point pressure of a kind of this water-supply and pressure-stabling system to determine method simultaneously
For achieving the above object, system of the present invention improves prior art, adopts " some level pressure, multiple spot moisturizing " constant pressure supply water mode, and concretely, technical scheme is:
It comprises a cover pressure signal mensuration and transmitting device and the moisturizing and the control device that are arranged on each moisturizing point, and moisturizing and control device are comprised of small pump, check-valves and electrical control cubicles, it is characterized in that:
Described pressure signal determinator is arranged on the water circulating pump porch of many thermals source looping network heating system base-load heat source (whole Heating Season all is in running status);
Described signal transmitting apparatus is transferred to pressure signal the electrical control cubicles of each moisturizing point;
The operating pressure value lower limit of described signal measuring device should be able to guarantee system under all operating conditions and inoperative operating mode, turned letter and vaporization phenomenon all do not occur.
For realize that system of the present invention all can normally move under various operating conditions, the pressurization point pressure of system of the present invention determines that method is:
The first step: according to the waterpower result of calculation of various operating conditions, determine respectively the minimum point of dynamic pressure line under each operating condition, and determine the force value that this promise system does not turn, do not vaporize and must satisfy;
Second step: according to the hydraulic analysis result of various operating conditions, determine respectively the relative pressure between the operation pressure minimum point and pressurization point under each operating condition;
The 3rd step: the force value that respectively the dynamic pressure line minimum point of various operating conditions must be satisfied is sued for peace with the relative pressure between operation pressure minimum point and the pressurization point, obtain under the various operating conditions, the assurance system does not turn, does not vaporize, the force value that pressurization point must satisfy;
The 4th step: the force value that must satisfy pressurization point under all operating conditions compares, get maximum as the minimum pressure value of the pressurization point of many thermals source looping network heating system, then this force value can guarantee that vaporization and turned letter phenomenon all do not occur many thermals source looping network heating system under various operating conditions.
In the 5th step, according to the minimum pressure value of many thermals source looping network pressurization of heat-supply system point, determine the reasonable pressure oscillation scope of pressurization point, and be set between active region into the small pump start and stop.Lower prescribing a time limit when between the active region that the pressure decreased of system constant pressure point is extremely set, the pressure signal of pressurization point transfers to the executing agency of the electrical control cubicles that is arranged on each moisturizing point by signal transmission system, and executing agency all sends instruction, starts its affiliated small pump; Along with the operation of small pump, the pressure of pressurization point gos up gradually.Reach upper between the active region of setting this pressure signal is delivered to the executing agency of the electrical control cubicles that is arranged on each moisturizing point by transmission system in limited time when the pressure of system constant pressure point, and executing agency sends instruction, stops the operation of its affiliated small pump; When system because dehydration, the pressure of pressurization point again be reduced between the active region of setting lower in limited time, small pump puts into operation again.So move in circles, the pressure all-the-time stable that guarantees system constant pressure point between a certain setting district in, and then ensure that many thermals source looping network heating system all can normally move under various operating conditions.
Advantage of the present invention is:
(1) because many thermals source looped network heating system only has a pressurization point, and the force value of pressurization point can guarantee that system is under all operating conditions and inoperative operating mode, turned letter and vaporization phenomenon all do not appear, therefore under different operating conditions, the fluctuation range of this pressurization point force value can remain unchanged, do not need to reset according to power condition changing, operational management is convenient.
(2) this constant pressure water compensation apparatus can guarantee system's security of operation, effectively avoids in " multiple spot moisturizing, multiple spot level pressure " measure, owing to auxiliary pressurization point pressure setting can not change system overpressure or the under-voltage phenomenon that causes by adaptation condition.
Description of drawings
Fig. 1 is the schematic diagram of the embodiment of the invention.
Among the figure: the 1-base-load heat source, the hot user of 2-, 3-regulates thermal source, 4-water circulating pump, 5-small pump, 6-check-valves, 7-pressure-detecting device, 8-electrical control cubicles, 9-signal transmitting apparatus.
The specific embodiment
Below in conjunction with accompanying drawing and workflow of the present invention its specific embodiment is described.
As shown in Figure 1, many thermals source ring-shaped heat-supply network of the embodiment of the invention is comprised of base-load heat source 1, hot user 2 and adjusting thermal source 3, base-load heat source 1 and adjusting thermal source 3 places are equipped with moisturizing and control device, and moisturizing and control device are comprised of small pump 5, check-valves 6, water circulating pump 4 and electrical control cubicles 8.As can be seen from Figure 1, pressure-detecting device 7 and signal transmitting apparatus 9 are arranged on the water circulating pump porch at base-load heat source 1.
The level pressure of water-supply and pressure-stabling of the present invention system determines that method is:
The first step: the hydraulic analysis result according to various operating conditions, determine respectively the minimum point of dynamic pressure line under each operating condition, and determine the force value that this promise system does not turn, do not vaporize and must satisfy; Its level pressure must satisfy following formula:
p＝Z
i+p
s+(3～5)mH
2O
In the formula, p---the force value that the operation pressure minimum point must satisfy, mH
2O;
Z
i---the discrepancy in elevation of operation pressure minimum point and heating system peak, m;
p
s---the pressure for vaporization that the specified supply water temperature of thermal source is corresponding, mH
2O.
Second step: according to the waterpower result of calculation of various operating conditions, determine the relative pressure Δ p between the dynamic pressure line minimum point and pressurization point O under the various operating modes
0i
The 3rd step: the force value that must satisfy the dynamic pressure line minimum point of every kind of operating condition is respectively sued for peace with the relative pressure between operation pressure minimum point and the pressurization point, tries to achieve the force value that pressurization point must satisfy under the corresponding operating mode; Utilize following formula to obtain the force value p that pressurization point O must satisfy under the various operating modes
0i
p
0i＝p+Δp
0i i＝1，2，…，L
In the formula, p
0i---the force value that pressurization point O must satisfy under a certain operating mode, mH
2O;
P---the force value that the operation pressure minimum point must satisfy under a certain operating mode, mH
2O;
Δ p
0i---the relative pressure of pressurization point O and this operating mode operation pressure minimum point under a certain operating mode, mH
2O;
L---the operating mode number of many thermals source looping network heating system.
The 4th step: the force value p that must satisfy pressurization point O under the various operating conditions
0iCompare, get its maximum as the minimum pressure value p of the pressurization point of many thermals source looping network heating system
0That is:
p
0＝max{p
0i}
In the formula, p
0---the pressure set points of pressurization point O, mH
2O;
In the 4th step, according to the minimum pressure value of many thermals source looping network pressurization of heat-supply system point, determine that (the minimum pressure value p of pressurization point should is a bit larger tham or equal to the lower limit of fluctuation range for the reasonable pressure oscillation scope of pressurization point
0, the higher limit maximum can not exceed the bearing requirements of system), and be set between active region into the small pump start and stop.
Lower prescribing a time limit when between the active region that the pressure decreased of system constant pressure point is extremely set, the pressure signal of pressurization point transfers to the executing agency of the electrical control cubicles that is arranged on each moisturizing point by signal transmission system, and executing agency all sends instruction, starts its affiliated small pump; Along with the operation of small pump, the pressure of pressurization point gos up gradually.Reach upper between the active region of setting this pressure signal is delivered to the executing agency of the electrical control cubicles that is arranged on each moisturizing point by transmission system in limited time when the pressure of system constant pressure point, and executing agency sends instruction, stops the operation of its affiliated small pump; When system because dehydration, the pressure of pressurization point again be reduced between the active region of setting lower in limited time, small pump puts into operation again.So move in circles, the pressure all-the-time stable that guarantees system constant pressure point between a certain setting district in, thereby ensure that many thermals source looping network heating system all can normally move under various operating conditions.
Claims (3)
1. the water-supply and pressure-stabling of thermal source ring-shaped heat-supply network more than kind system, it comprises a cover pressure signal mensuration and transmitting device and the moisturizing and the control device that are arranged on each moisturizing point, moisturizing and control device are comprised of small pump, check-valves and electrical control cubicles, it is characterized in that:
Described pressure signal determinator is arranged on the water circulating pump porch of many thermals source looping network heating system base-load heat source;
Described signal transmitting apparatus is transferred to pressure signal the electrical control cubicles of each moisturizing point;
The operating pressure value lower limit of described signal measuring device should be able to guarantee system under all operating conditions and inoperative operating mode, turned letter and vaporization phenomenon all do not occur, and definite method of operating pressure value lower limit is as follows:
The first step: according to the waterpower result of calculation of various operating conditions, determine respectively the minimum point of operation pressure under each operating condition, and determine the force value that this promise system does not turn, do not vaporize and must satisfy;
Second step: according to the hydraulic analysis result of various operating conditions, determine respectively the relative pressure between the operation pressure minimum point and pressurization point under each operating condition;
The 3rd step: the force value that respectively the operation pressure minimum point of various operating conditions must be satisfied is sued for peace with the relative pressure between operation pressure minimum point and the pressurization point, obtain under the various operating conditions, the assurance system does not turn, does not vaporize, the force value that pressurization point must satisfy;
The 4th step: the force value that must satisfy pressurization point under all operating conditions compares, get maximum as the minimum pressure value of the pressurization point of many thermals source looping network heating system, then this force value can guarantee that vaporization and turned letter phenomenon all do not occur many thermals source looping network heating system under various operating conditions;
The 5th step: according to the minimum pressure value of many thermals source looping network pressurization of heat-supply system point, determine the reasonable pressure oscillation scope of pressurization point, and be set between active region into the small pump start and stop.
2. the pressurization point pressure of water-supply and pressure-stabling as claimed in claim 1 system is determined method, it is characterized in that, it may further comprise the steps:
The first step: according to the waterpower result of calculation of various operating conditions, determine respectively the minimum point of operation pressure under each operating condition, and determine the force value that this promise system does not turn, do not vaporize and must satisfy;
Second step: according to the hydraulic analysis result of various operating conditions, determine respectively the relative pressure between the operation pressure minimum point and pressurization point under each operating condition;
The 3rd step: the force value that respectively the operation pressure minimum point of various operating conditions must be satisfied is sued for peace with the relative pressure between operation pressure minimum point and the pressurization point, obtain under the various operating conditions, the assurance system does not turn, does not vaporize, the force value that pressurization point must satisfy;
The 4th step: the force value that must satisfy pressurization point under all operating conditions compares, get maximum as the minimum pressure value of the pressurization point of many thermals source looping network heating system, then this force value can guarantee that vaporization and turned letter phenomenon all do not occur many thermals source looping network heating system under various operating conditions;
In the 5th step, according to the minimum pressure value of many thermals source looping network pressurization of heat-supply system point, determine the reasonable pressure oscillation scope of pressurization point, and be set between active region into the small pump start and stop.
3. the pressurization point pressure of water-supply and pressure-stabling as claimed in claim 2 system is determined method, it is characterized in that, it may further comprise the steps:
The first step: the hydraulic analysis result according to various operating conditions, determine respectively the minimum point of operation pressure under each operating condition, and determine the force value that this promise system does not turn, do not vaporize and must satisfy; Its level pressure must satisfy following formula:
p＝Z
i+p
s+(3～5)
In the formula, p---the force value that the operation pressure minimum point must satisfy, mH
2O;
Z
i---the pressure reduction of operation pressure minimum point and heating system peak, mH
2O;
p
s---the pressure for vaporization that the specified supply water temperature of thermal source is corresponding, mH
2O;
Second step: according to the waterpower result of calculation of various operating conditions, determine the relative pressure Δ p between the operation pressure minimum point and pressurization point O under the various operating modes
0i
The 3rd step: the force value that must satisfy the operation pressure minimum point of every kind of operating condition is respectively sued for peace with the relative pressure between operation pressure minimum point and the pressurization point, tries to achieve the force value that pressurization point must satisfy under the corresponding operating mode; Utilize following formula to obtain the force value p that pressurization point O must satisfy under the various operating modes
0i
p
0i＝p+Δp
0i i＝1，2，…，L
In the formula, p
0i---the force value that pressurization point O must satisfy under a certain operating mode, mH
2O;
P---the force value that the operation pressure minimum point must satisfy under a certain operating mode, mH
2O;
Δ p
0i---the relative pressure of pressurization point O and this operating mode operation pressure minimum point under a certain operating mode, mH
2O;
L---the operating mode number of many thermals source looping network heating system;
The 4th step: the force value p that must satisfy pressurization point O under the various operating conditions
0iCompare, get its maximum as the minimum pressure value p of the pressurization point of many thermals source looping network heating system
0That is:
p
0＝max{p
0i}
In the formula, p
0---the minimum pressure value of pressurization point O, mH
2O;
The 5th step: according to the minimum pressure value of many thermals source looping network pressurization of heat-supply system point, determine the reasonable pressure oscillation scope of pressurization point, the minimum pressure value p of pressurization point should is a bit larger tham or equal to the lower limit of fluctuation range
0, the higher limit maximum can not exceed the bearing requirements of system, and is set between active region into the small pump start and stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010299490 CN101943440B (en) | 2010-09-27 | 2010-09-27 | Water replenishing and pressure determining system for multi-heat source annular heat supply pipe network and method for determining pressure of constant pressure point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010299490 CN101943440B (en) | 2010-09-27 | 2010-09-27 | Water replenishing and pressure determining system for multi-heat source annular heat supply pipe network and method for determining pressure of constant pressure point |
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| Publication Number | Publication Date |
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| CN101943440A CN101943440A (en) | 2011-01-12 |
| CN101943440B true CN101943440B (en) | 2013-01-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175243B (en) * | 2013-02-22 | 2015-02-25 | 太原理工大学 | Double water pump water supplementing constant pressure system and constant pressure method |
| CN105674377A (en) * | 2015-11-17 | 2016-06-15 | 李微 | Main-auxiliary type multi-heat-source series-connection grid-connected heating device |
| CN111396985B (en) * | 2020-03-26 | 2021-07-06 | 河南理工大学 | Automatic regulating system for static hydraulic balance of centralized heat supply pipe network and implementation method |
| CN115046244B (en) * | 2022-06-17 | 2024-01-16 | 山东核电有限公司 | Constant pressure system for supplying water to heat supply network pipe and pressure determining method for constant pressure point |
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|---|---|---|---|---|
| CN2040613U (en) * | 1988-09-21 | 1989-07-05 | 松花江地区非标准设备工业公司 | Fully automatic safe constant pressure device for water heating |
| EP1239231A2 (en) * | 2001-01-26 | 2002-09-11 | Jan Henk Cnossen | System for temperature treatment with transfer medium |
| GB2377745A (en) * | 2001-02-07 | 2003-01-22 | Heatrae Sadia Heating Ltd | A replenishment system |
| CN200940898Y (en) * | 2006-08-28 | 2007-08-29 | 大连川源热力实业有限公司 | Modular gas thermodynamic set heating system |
-
2010
- 2010-09-27 CN CN 201010299490 patent/CN101943440B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040613U (en) * | 1988-09-21 | 1989-07-05 | 松花江地区非标准设备工业公司 | Fully automatic safe constant pressure device for water heating |
| EP1239231A2 (en) * | 2001-01-26 | 2002-09-11 | Jan Henk Cnossen | System for temperature treatment with transfer medium |
| GB2377745A (en) * | 2001-02-07 | 2003-01-22 | Heatrae Sadia Heating Ltd | A replenishment system |
| CN200940898Y (en) * | 2006-08-28 | 2007-08-29 | 大连川源热力实业有限公司 | Modular gas thermodynamic set heating system |
Non-Patent Citations (3)
| Title |
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| 孟萍.热水供热系统的定压方式.《山西科技> * |
| 孟萍.热水供热系统的定压方式.《山西科技>.2004,(第6期),93-96. |
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