CN102269444A - Energy control system and method of heat supply and cold water supply circulation - Google Patents
Energy control system and method of heat supply and cold water supply circulation Download PDFInfo
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- CN102269444A CN102269444A CN2011101395118A CN201110139511A CN102269444A CN 102269444 A CN102269444 A CN 102269444A CN 2011101395118 A CN2011101395118 A CN 2011101395118A CN 201110139511 A CN201110139511 A CN 201110139511A CN 102269444 A CN102269444 A CN 102269444A
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Abstract
The invention discloses an energy control system and method of heat supply and cold water supply circulation, and relates to a multi-user heat supply and cold supply system having a terminal device with or without a regulation function and the control of the corresponding water pump system, effectively solving problems of heat energy waste and energy source waste generated by water pump circulation. The energy control system provided by the invention consists of a backwater supply pipeline of a heat source, a water pump, a VFD (variable frequency drive), a flow meter, an electric control valve, a differential pressure transducer, a temperature sensor, a user terminal and a controller capable of monitoring performances of the water pump, starting/ closing the water pump and regulating the related control logic of the water pump frequency. Through the applications of the system provided by the invention, the indoor temperature can be controlled well, the indoor comfort can be improved, and the integral over-cold or over-hot phenomenon in the construction room is avoided; also the heat energy waste is reduced by 30%; and the energy source waste of the circulation water pump is reduced by 70%-90%.
Description
Technical field
The invention belongs to heat supply and cooling technical field, particularly a kind of its end equipment of multi-user have or
The control system of the heat supply of no regulatory function and cold supply system and corresponding water pump system thereof.
Background technology
It is the system of heat transfer medium that the heating system of present building (comprising residential housing, commercial building etc.) mostly is with hot water, user's end is based on radiator, radiant panel (mostly being the floor) and fan coil, there is corresponding water pump system hot porch the user, wherein also has part to adopt and mixes water.
For end equipment is the heating system of radiator, and many buildings of the hot water supply of coming out from the boiler room by the flow through water pump of every building user porch of pipeline, are sent into the each household end through the pressurization of water pump building is carried out heat supply.The end of this heating system (radiator itself) does not generally have self-checking device, promptly can not adjust supply water temperature and output according to the variation of building load; And can system be regulated accordingly at the water pump place of boiler room and consumer heat inlet, what generally adopt at present is experiential manual adjustment, it can be divided into concentrating regulates and local modulation.The supply water temperature or the output that come out from the boiler room promptly regulated in concentrated adjusting, and this regulative mode can not guarantee to build interior requirements of different users simultaneously; Local modulation is the adjusting to the water temperature and the water yield in the hot porch of user, the general at present mode that adopts control valve, and this regulative mode is because restriction loss makes that the water circulating pump energy waste is serious.This regulative mode can produce following three aspect problems:
1. indoor thermal is relatively poor, mainly shows as the whole overheated or cold excessively of interior each user of building;
2. thermal waste is serious;
3. the water circulating pump energy waste is serious;
For end-equipment is the heating system on floor, at the user entry place multifunctional pump or thermal substation are arranged more, the high-temperature water that comes out from the boiler room mixes with backwater or becomes water at low temperature by heat exchanger through multifunctional pump, and water at low temperature enters into user's end and carries out heat supply to indoor under the effect of water pump.The control method of this heating system mainly also is experiential manual adjustment at present, and is identical substantially with the regulative mode of radiator system, and the problem that is produced has above-mentioned 3 points equally.
For end-equipment is the system of fan coil, Winter heat supply, summer cooling.In the process of heat supply, thermal source is a boiler, and the hot water that produces in the boiler flows into water knockout drum through piping, sends into user's end through water pump again; In the process of cooling, low-temperature receiver is a handpiece Water Chilling Units, and the chilled water that comes out from handpiece Water Chilling Units enters water knockout drum through piping, flows into user's end through water pump again.Regulate and the air quantity adjusting for the water yield that the regulative mode of fan coil system mainly is divided in the fan coil.This regulative mode mainly relies on valve regulated to finish, though on certain degree, solved the problem of indoor comfort and the problem of thermal waste, because the loss that valve throttle causes is not resolved at present yet.On the other hand, though fan coil system has automaton at user's end,, have little effect because the problem of water pump control aspect makes valve regulated lose efficacy.
Through above-mentioned analysis as can be known, present heating system exists very big problem, and except the indoor thermal problem needed to be resolved hurrily, the energy waste that thermal waste and water pump circulation produce was still very serious.Owing to exist above these problems to cause the great waste of using energy source.Heating is the importance of AND ENERGY RESOURCES CONSUMPTION IN CHINA, 37% of China's building energy consumption account whole nation total energy consumption, and by the end of 2010, China's cities and towns existing building area reached 20,000,000,000 square metres, and the annual expense of heat supply that needs is roughly 7,000 hundred million yuan.Along with the development of China's construction business, heating area also will have the raising of vast scale; Simultaneously, along with the energy crisis and the environmental issue in the world are serious day by day, people are striving to find new heating energy method.
Summary of the invention
The purpose of this invention is to provide a kind of energy management system and control method of water circulation, can effectively regulate indoor thermal, avoid the overheated or surfusion of architecture indoor; Solve the serious problems of the waste and the water circulating pump energy waste of energy heat energy simultaneously.
Realize the energy management system of the water circulation of technical solution of the present invention, comprise thermal source for water return pipeline, water pump, frequency converter VFD, flowmeter, electric control valve, differential pressure pickup, temperature sensor, the terminal and controller that can monitor pump performance, startup/switch off the pump and the relevant control logic of regulating the water pump frequency of user.
The energy management system structure of heat supply of the present invention and the circulation of cooling water is, the rear end that is equipped with electric control valve, electric control valve on supply channel is a branch line, this branch line is at least one, manual modulation valve is housed respectively on each branch line successively, water circulating pump, electric control valve; Water circulating pump on each branch line is respectively arranged with differential pressure pickup, the water circulating pump frequency converter respectively with branch line on water circulating pump join, differential pressure pickup and frequency converter are with being connected with the pump capacity meter; Become same pipeline and user's end to link to each other at the terminal bout of branch line, the rear end and the water return pipeline of user's end join; Be provided with temperature sensor respectively at the feed pipe and the return pipe place that connect user's end, differential pressure pickup be set in the rear and front end of user's end; On the water return pipeline of user's end, be provided with manual modulation valve; Pump capacity meter, temperature sensor and differential pressure pickup are connected with controller.
Water pump pressure reduction, rotating speed and the power that the pump capacity meter provides according to differential pressure pickup and pump variable frequency device obtains the flow of water pump, controller is then according to the pump capacity meter, system's real time execution parameter and control logic that temperature sensor and differential pressure pickup provided are come the aperture of control valve and the rotating speed of water pump, are optimized with the operation of realization to system.
When the present invention is the regular circulation control system, can be many water pump parallel connections, differential pressure pickup on each branch line and pump capacity meter are replaced with traditional flowmeter, more traditional flowmeter is directly linked to each other with controller, reach the purpose of monitoring pump capacity.
Heat supply of the present invention and its control method of cooling water circulating energy control system comprise: water system control is controlled and mixed to circulation, and its each automatic control method is as follows:
Circulation control: the hot water that comes out from thermal source enters into water circulating pump by feed pipe through control valve, sends into user's end through water circulating pump, and backwater flows back to thermal source through return pipe after user's end comes out.
When outer net pressure reduction during greater than the needed value of Intranet pressure reduction, controller then consumes unnecessary pressure reduction by regulating motor-driven valve, and need not the ON cycle water pump this moment, just can satisfy the needs of user's end; When outer net pressure reduction during less than the needed value of Intranet pressure reduction, then motor-driven valve is all opened, and operation is optimized controller to system according to pump capacity meter, temperature sensor and differential pressure pickup input value.
Mix water system control: mixed water system generally is used for the system of low temperature heatings such as geothermal heating.Different with circulation control is, a backwater part of coming out from user's end flows to feed pipe through multifunctional pump, and sends into user's end after the high-temperature water that enters from the outer net feed pipe mixes, and a part is then directly got back to thermal source by return pipe.
But the pressure of working as backwater then need not to open multifunctional pump greater than the pressure that supplies water.The variation of multifunctional pump rotating speed and flow can be finished the control of frequency converter by controller, promptly mixes discharge by control, and then the mixed water ratio of control system, thereby the change system supplies with user's supply water temperature, has realized that the matter in system's running is regulated.
The entire system control procedure: in system's running, the confession that controller provides according to temperature sensor, return water temperature, and the system operational parameters such as pump capacity that provide of pump capacity meter control to adjust the operating frequency of water circulating pump and multifunctional pump.When the systemic circulation water yield during greater than the critical value set, system's employing amount mode of regulating then, the frequency that regulate water circulating pump this moment; When the quantity of circulating water of system during less than the critical value set, then system adopts the method that matter is regulated, the frequency that should regulate multifunctional pump in having the system of mixing water.
When water circulating pump is double pump system, during less than the minimum speed of water pump, then close a water pump wherein at the exploitation speed of water pump, close corresponding valve simultaneously.
This control system both had been applicable to the water circulation system that does not have water admixing device, also was applicable to the water circulation system of water admixing device.
Its user's end can be following several:
1. terminal radiator heating system and the heat-exchange system that does not have adjusting device;
2. terminal radiator heating system and the heat-exchange system that adjusting device is arranged;
3. terminal radiant floor heating system and the heat-exchange system that does not have adjusting device;
4. terminal radiant floor heating system and the heat-exchange system that adjusting device is arranged;
5. terminal fan coil cooling unit and the heat-exchange system that adjusting device is arranged;
6. other is similar to various heat supplies, refrigeration system and the civilian and industrial heat energy system of said system;
The effect that the present invention is useful is
(1) can well control indoor temperature, improve indoor comfort, avoid architecture indoor integral body to cross cold or overheated phenomenon;
(2) can make thermal waste reduce 30%;
(3) can make the energy waste of water circulating pump reduce 70%--90%;
(4) need be in the control indoor temperature at indoor installation temperature sensing device;
As calculated, control system integral body of the present invention can reach about 30% energy-saving effect, can save energy up to 2,000 hundred million yuan remarkable in economical benefits every year.
Description of drawings
Fig. 1 is a water cyclic control system schematic diagram of the present invention
Fig. 2 has the water cyclic control system schematic diagram of water admixing device for the present invention
Fig. 3 is the schematic diagram of regular circulation control system of the present invention
Fig. 4 has the schematic diagram of the regular circulation control system of water admixing device for the present invention
The specific embodiment
Embodiment 1:
The loop control of double pump system
The recirculated water control system
As shown in Figure 1, the hot water that comes out from thermal source passes through electric control valve 2 backs, is divided into two branch lines in parallel by feed pipe, manual modulation valve 6 or 7 (these two valves can exchange with electric control valve 14 or 15, also can directly change electric control valve into), water circulating pump 10 or 11, electric control valve 14 or 15 are housed respectively on branch line successively.On the water circulating pump 10 or 11 of branch line, differential pressure pickup 8 or 9 are set, are used for measuring the pressure reduction that water circulating pump provides.On water circulating pump 10,11, water circulating pump frequency converter 12 is set, this frequency converter can transfer to pump capacity meter 13 with the parameters such as rotating speed, power and frequency of water pump on the one hand, can change the rotating speed and the frequency of water pump on the other hand according to the output command of controller 1; Differential pressure pickup 8,9 and frequency converter 12 are with joining with pump capacity meter 13, the effect of pump capacity meter is that the parameter (pressure reduction that pump rotary speed, pump power and water pump provide) of input is carried out the flow value that computing is transformed into water pump, is transferred in the controller 1.After the branch line bout becomes same pipeline hot water is sent into user's end, backwater flows back to thermal source through return pipe after user's end comes out.Be provided with temperature sensor 16,17 respectively at the feed pipe and the return pipe place that connect user's end, be used for the supply and return water temperature of measuring system; Be provided with differential pressure pickup 18 at the two ends of user's end, be used for measuring user's real-time pressure reduction.On the water return pipeline of user's end, be provided with manual modulation valve 19 (this valve can exchange with electric control valve 2, also can directly be changed to electric control valve).Water pump pressure reduction, rotating speed and the power that pump capacity meter 13 provides according to differential pressure pickup 8,9 and pump variable frequency device 12 obtains the flow of water pump, 1 of controller is according to pump capacity meter 13, system's real time execution parameter and control logic that temperature sensor 16,17 and differential pressure pickup 18 are provided are come the aperture of control valve and the rotating speed of water pump, are optimized with the operation of realization to system.
In the control of this circulation, when outer net pressure reduction during, then consume unnecessary pressure reduction by regulating motor-driven valve 2 greater than the needed value of Intranet pressure reduction, need not the ON cycle water pump at this moment, just can satisfy the needs of user's end; When outer net pressure reduction during less than the needed value of Intranet pressure reduction, then electrically operated valve 2 is all opened.
In this system, water circulating pump 10,11 both can be traditional parallel water pump, the using and the reserved, and every operating load all is 100%; Also can be double pump system, i.e. two water pump common operations in parallel, every operating load is 50%.When water circulating pump is double pump system, when the exploitation speed of water pump reaches the minimum speed of design, then close a water pump wherein, close corresponding valve 14 or 15 on this water pump branch line simultaneously.
Embodiment 2:
The loop control of double pump system
The circulation control method
(1) control principle: the heat E that provides according to water circulation in the comparison system
sWith in order to keep the heat E that room temperature consumes under design temperature
c, need not measure under the situation of room temperature, guarantee that room temperature is in the scope of its control.As the heat E that provides
sLess than the heat E that consumes under the design temperature
c, judge that then indoor actual temperature is higher than setting value, should reduce the discharge of system this moment for heating system; For refrigeration system, should increase the discharge of system.
(2) the heat E that provides of water circulation
s
Calculate this value in two kinds of situation respectively
First kind of situation: outer net pressure reduction can provide the whole power or the part power of system water circulation, at this moment
E
s＝C
pQ(T
1-T
2) ①
E
s--the heat that the water circulation provides
C
p--the specific heat at constant pressure of water, J/ (kgK)
Q--circulating pump discharge, kg/h
T
1--supply water temperature, ℃
T
2--return water temperature, ℃
Second kind of situation: the power of system water circulation all derives from water pump or water circulation system independently, and this moment, the flow and the rotating speed of water pump were directly proportional,
E
s＝Aω(T
1-T
2) ②
The A--constant coefficient
ω--pump rotary speed, r/min
(3) for keeping the heat E that indoor temperature consumes in setting value
c
E
c＝B(T
1+T
2-2T
3) ③
E
cThe heat setting value of----consumption
The B--constant coefficient
T
3--the indoor temperature setting value, ℃
(4) control logic
First kind of situation (all or part of power of water circulation comes from outer net):
1) setting user's available pressure reduction is Δ P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. Δ P＞Δ P
0, then detect the unlatching situation of water circulating pump 10,11,
When water circulating pump cuts out, then reduce the aperture of motor-driven valve 2, make it consume unnecessary pressure reduction;
When water circulating pump was opened, the frequency that then reduces water circulating pump was out of service until water pump, and then regulated motor-driven valve 2 again, made its pressure reduction satisfy user's needs;
3) the design temperature T of designated room
3,
4) by formula 1., according to the pump capacity Q that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by formula 3., according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system, reduce the frequency of water circulating pump 10,11;
For refrigeration system, increase the frequency of water circulating pump 10,11;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system, increase the frequency of water circulating pump 10,11;
For refrigeration system, reduce the frequency of water circulating pump 10,11;
The function of this control logic is: need not indoor temperature is measured, just can keep indoor temperature in setting range.
Second kind of situation (whole power resources of water circulation are in water pump, and this moment, pump rotary speed ω was directly proportional with flow G):
1) setting user's available pressure differential deltap P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. pressure differential deltap P＜Δ P
0, the unlatching situation of detection motor-driven valve 2,
When motor-driven valve 2 is all opened, then increase the frequency of water circulating pump;
When motor-driven valve 2 is not all opened, then motor-driven valve 2 is all opened, increase the frequency of water circulating pump afterwards again;
3) the design temperature T of designated room
3,
4) by formula 2., according to the pump rotary speed ω that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by formula 3., according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system, reduce the frequency of water circulating pump 10,11;
For refrigeration system, increase the frequency of water circulating pump 10,11;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system, increase the frequency of water circulating pump 10,11;
For refrigeration system, reduce the frequency of water circulating pump 10,11;
The function ratio of this control logic has been avoided the measurement to pump capacity than first kind of situation, only need know that the rotating speed of water pump gets final product, and is directly proportional but its prerequisite is the rotating speed and the flow of water pump.
Embodiment 3:
Have the double pump system loop control of water admixing device
What present embodiment was narrated is heat supply and the cooling water circulation system that water admixing device is arranged.With the difference of above-mentioned no water admixing device system be, regulate on the basis being provided with water admixing device in the amount of embodiment 1, native system can mix water and regulate in the process of operation, promptly regulate the supply water temperature to the user--the matter adjusting.So in the system of water admixing device was arranged, control system of the present invention can realize quality-Flow-rate adjustment is carried out in heat supply and cold supply system.
Mix water control system:
Mixed water control system generally is used for the system of low temperature heatings such as geothermal heating.Its operational system is similar to the circulation control structure, different is on the feed pipe that circulation is come out from thermal source, pipeline between the A point as shown in accompanying drawing 2 and the B point of return pipe, multifunctional pump 3, multifunctional pump frequency converter VFD5 and electric control valve 4 are set, the high-temperature-hot-water that the A point is become come out from thermal source and the mixing point of system's backwater, the B point is the split point of system's backwater, promptly the backwater that comes out from the user is shunted at the B point, a part flows to the A point through multifunctional pump 3, and a part is directly got back in the thermal source by return pipe.When the B point pressure greater than the A point pressure, then need not to open multifunctional pump 3.The variation of multifunctional pump 3 rotating speeds and flow can be finished by the control of 1 pair of frequency converter 5 of controller.
In system's running, confession, return water temperature that controller 1 provides according to temperature sensor 16,17,13 system operational parameters such as pump capacity that provide control to adjust the operating frequency of water circulating pump 10,11 and multifunctional pump 3.When the systemic circulation water yield is regulated greater than matter and is measured the boundary flow of regulating, the mode that system's employing amount is regulated, the frequency that regulate water circulating pump 10,11 this moment; When the quantity of circulating water of system is regulated less than matter and is measured the boundary flow of regulating, the method that system adopts matter to regulate, the frequency that in having the system of mixing water, should regulate multifunctional pump 3.
Embodiment 4:
The loop control of double pump system
Mix the control method of water control system
(1) control principle: the heat E that provides according to water circulation in the comparison system
sWith in order to keep the heat E that room temperature consumes under design temperature
c, need not measure under the situation of room temperature, guarantee that room temperature is in the scope of its control.
As the heat E that provides
sLess than the heat E that consumes under the design temperature
c, judge that then indoor actual temperature is higher than setting value, should reduce the discharge of system or reduce water temperature for heating system this moment; For refrigeration system, should increase the discharge of system or reduce water temperature.
(2) the heat E that provides of water circulation
s
Calculate this value in two kinds of situation respectively
First kind of situation: outer net pressure reduction can provide the whole power or the part power of system water circulation, at this moment
E
s＝C
pQ(T
1-T
2) ①
Second kind of situation: the power of system water circulation all derives from water pump or water circulation system independently, and this moment, the flow and the rotating speed of water pump were directly proportional,
E
s＝Aω(T
1-T
2) ②
(3) for keeping the heat E that indoor temperature consumes in setting value
c
E
c＝B(T
1+T
2-2T
3) ③
(4) control logic
First kind of situation (all or part of power of water circulation comes from outer net):
1) setting user's available pressure differential deltap P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. Δ P＞Δ P
0, the unlatching situation of detection water circulating pump 10,11,
When water circulating pump cuts out, then reduce the aperture of motor-driven valve 2, make it consume unnecessary pressure reduction;
When water circulating pump was opened, the frequency that then reduces water circulating pump was out of service until water pump, and then regulated motor-driven valve 2 again, made its pressure reduction satisfy user's needs;
3) the design temperature T of designated room
3,
4) by formula 1., according to the pump capacity Q that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by formula 3., according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
For refrigeration system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3;
For refrigeration system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3.
Second kind of situation (whole power resources of water circulation are in water pump, and this moment, pump rotary speed ω was directly proportional with flow G):
1) setting user's available pressure differential deltap P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. Δ P＜Δ P
0The time, the unlatching situation of detection motor-driven valve 2,
When motor-driven valve 2 is all opened, then increase the frequency of water circulating pump;
When motor-driven valve 2 is not all opened, then motor-driven valve 2 is all opened, increase the frequency of water circulating pump afterwards again;
3) the design temperature T of designated room
3,
4) by formula 2., according to the pump rotary speed ω that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by formula 3., according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system:
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
For refrigeration system:
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system:
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3;
For refrigeration system:
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3;
This system compares with the water circulation system of no water admixing device, has increased matter and has regulated part, can be so that system can carry out quality-Flow-rate adjustment according to the variation of actual load in the process of operation.So both can save energy simultaneously so that regulating effect is better.
Embodiment 5:
The loop control of conventional system
In the conventional system, can be many water pump parallel connections, use conventional flowmeter to replace the pump capacity meter simultaneously, the control procedure of its control procedure and double pump system is similar.System diagram is seen Fig. 3 and Fig. 4.
Be with the difference of double pump system, use the quantity of circulating water in traditional flowmeter 21 direct measuring systems in the conventional system, thereby saved differential pressure pickup 8,9 and the pump capacity meter 13 in the double pump system.Flow signal directly is transferred in the controller 1 by flowmeter.
Its corresponding system is divided into the system of system that water admixing device is arranged and no water admixing device equally, and its control principle is identical with above-mentioned double pump system with control logic.
Claims (10)
1. the energy management system of heat supply and cooling water circulation, the confession water return pipeline, water pump, flowmeter, control valve, temperature sensor and the user's end that comprise thermal source, it is characterized in that: the rear end that is equipped with electric control valve, electric control valve on supply channel is a branch line, this branch line is at least one, manual modulation valve is housed respectively on each branch line successively, water circulating pump, electric control valve; Water circulating pump on each branch line is respectively arranged with differential pressure pickup, the water circulating pump frequency converter respectively with branch line on water circulating pump join, differential pressure pickup and frequency converter are with being connected with the pump capacity meter; Become same pipeline and user's end to link to each other at the terminal bout of branch line, the rear end and the water return pipeline of user's end join; Be provided with temperature sensor respectively at the feed pipe and the return pipe place that connect user's end, differential pressure pickup be set in the rear and front end of user's end; On the water return pipeline of user's end, be provided with manual modulation valve; Pump capacity meter, temperature sensor and differential pressure pickup are connected with controller.
2. control system according to claim 1 is characterized in that: differential pressure pickup on each branch line and pump capacity meter are replaced with traditional flowmeter, more traditional flowmeter is directly linked to each other with controller, reach the purpose of monitoring pump capacity.
3. control system according to claim 1 and 2 is characterized in that: described user's end is one of them of following several structures:
1) end does not have the radiator heating system and the heat-exchange system of adjusting device;
2) end has the radiator heating system and the heat-exchange system of adjusting device;
3) end does not have the radiant floor heating system and the heat-exchange system of adjusting device;
4) end has the radiant floor heating system and the heat-exchange system of adjusting device;
5) end has the fan coil cooling unit and the heat-exchange system of adjusting device.
4. the control method of the energy management system of heat supply and cooling water circulation, it is characterized in that: its circulation control: the hot water that comes out from thermal source enters into water circulating pump by feed pipe through control valve, send into user's end through water circulating pump, backwater flows back to thermal source through return pipe after user's end comes out; When outer net pressure reduction during greater than the needed value of Intranet pressure reduction, controller then consumes unnecessary pressure reduction by regulating motor-driven valve, need not the ON cycle water pump this moment, just can satisfy the needs of user's end, when outer net pressure reduction during less than the needed value of Intranet pressure reduction, then motor-driven valve is all opened, and operation is optimized controller to system according to pump capacity meter, temperature sensor and differential pressure pickup input value.
5. control method according to claim 4 is characterized in that: the confession that described controller provides according to temperature sensor, return water temperature, and the system operational parameters such as pump capacity that provide of pump capacity meter control to adjust the operating frequency of water circulating pump; When the systemic circulation water yield during greater than the critical value set, system's employing amount mode of regulating then, the frequency that regulate water circulating pump this moment; When the quantity of circulating water of system during less than the critical value set, then system adopts the method that matter is regulated.
6. control method according to claim 5 is characterized in that: described water circulating pump is traditional parallel water pump, the using and the reserved, and every operating load all is 100%; Or double pump system, i.e. two water pump common operations in parallel, every operating load is 50%; When water circulating pump is double pump system, when the exploitation speed of water pump reaches the minimum speed of design, then close a water pump wherein, close corresponding valve on this water pump branch line simultaneously.
7. according to claim 4 or 5 described control methods, it is characterized in that: described circulation control logic method is:
A, first kind of situation--all or part of power of water circulation comes from outer net:
1) setting user's available pressure reduction is Δ P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. Δ P＞Δ P
0, then detect the unlatching situation of water circulating pump 10,11,
When water circulating pump cuts out, then reduce the aperture of motor-driven valve 2, make it consume unnecessary pressure reduction;
When water circulating pump was opened, the frequency that then reduces water circulating pump was out of service until water pump, and then regulated motor-driven valve 2 again, made its pressure reduction satisfy user's needs;
3) the design temperature T of designated room
3,
4) by 1. E of formula
s=C
pQ (T
1-T
2), according to the pump capacity Q that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by 3. E of formula
c=B (T
1+ T
2-2T
3), according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system, reduce the frequency of water circulating pump 10,11;
For refrigeration system, increase the frequency of water circulating pump 10,11;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system, increase the frequency of water circulating pump 10,11;
For refrigeration system, reduce the frequency of water circulating pump 10,11;
The function of this control logic is: need not indoor temperature is measured, just can keep indoor temperature in setting range;
B, second kind of situation--whole power resources of water circulation are in water pump, and this moment, pump rotary speed ω was directly proportional with flow G:
1) setting user's available pressure differential deltap P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. pressure differential deltap P＜Δ P
0, the unlatching situation of detection motor-driven valve 2,
When motor-driven valve 2 is all opened, then increase the frequency of water circulating pump;
When motor-driven valve 2 is not all opened, then motor-driven valve 2 is all opened, increase the frequency of water circulating pump afterwards again;
3) the design temperature T of designated room
3,
4) by 2. E of formula
s=A ω (T
1-T
2), according to the pump rotary speed ω that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by 3. E of formula
c=B (T
1+ T
2-2T
3), according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system, reduce the frequency of water circulating pump 10,11;
For refrigeration system, increase the frequency of water circulating pump 10,11;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system, increase the frequency of water circulating pump 10,11;
For refrigeration system, reduce the frequency of water circulating pump 10,11;
The function ratio of this control logic has been avoided the measurement to pump capacity than first kind of situation, only need know that the rotating speed of water pump gets final product, and is directly proportional but its prerequisite is the rotating speed and the flow of water pump.
8. the energy management system of heat supply according to claim 1 and the circulation of cooling water, it is characterized in that: the pipeline between the B point of A point and return pipe on the feed pipe that circulation is come out from thermal source, multifunctional pump 3, multifunctional pump frequency converter VFD 5 and electric control valve 4 are set, the high-temperature-hot-water that the A point is become come out from thermal source and the mixing point of system's backwater, the B point is the split point of system's backwater, promptly the backwater that comes out from the user is shunted at the B point, a part flows to the A point through multifunctional pump 3, and a part is directly got back in the thermal source by return pipe; When the B point pressure greater than the A point pressure, then need not to open multifunctional pump 3; The variation of multifunctional pump 3 rotating speeds and flow can be finished by the control of 1 pair of frequency converter 5 of controller.
9. control method according to claim 4, it is characterized in that: confession, return water temperature that the controller 1 in having the system of mixing water provides according to temperature sensor 16,17,13 system operational parameters such as pump capacity that provide control to adjust the operating frequency of water circulating pump 10,11 and multifunctional pump 3; When the systemic circulation water yield is regulated greater than matter and is measured the boundary flow of regulating, the mode that system's employing amount is regulated, the frequency that regulate water circulating pump 10,11 this moment; When the quantity of circulating water of system is regulated less than matter and is measured the boundary flow of regulating, the method that system adopts matter to regulate, the frequency that in having the system of mixing water, should regulate multifunctional pump 3.
10. control method according to claim 9 is characterized in that: described mixed water control system control logic method is:
A, first kind of situation--all or part of power of water circulation comes from outer net:
1) setting user's available pressure differential deltap P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. Δ P＞Δ P
0, the unlatching situation of detection water circulating pump 10,11,
When water circulating pump cuts out, then reduce the aperture of motor-driven valve 2, make it consume unnecessary pressure reduction;
When water circulating pump was opened, the frequency that then reduces water circulating pump was out of service until water pump, and then regulated motor-driven valve 2 again, made its pressure reduction satisfy user's needs;
3) the design temperature T of designated room
3,
4) by 1. E of formula
s=C
pQ (T
1-T
2), according to the pump capacity Q that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by 3. E of formula
c=B (T
1+ T
2-2T
3), according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
For refrigeration system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3;
For refrigeration system,
When pump capacity G regulates and measure the boundary flow G that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump capacity G regulates and measure the boundary flow G that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3;
B, second kind of situation--whole power resources of water circulation are in water pump, and this moment, pump rotary speed ω was directly proportional with flow G:
1) setting user's available pressure differential deltap P
0, the actual pressure differential at user two ends is Δ P,
2) when the actual pressure differential at user two ends when setting user's available pressure reduction, i.e. Δ P＜Δ P
0The time, the unlatching situation of detection motor-driven valve 2,
When motor-driven valve 2 is all opened, then increase the frequency of water circulating pump;
When motor-driven valve 2 is not all opened, then motor-driven valve 2 is all opened, increase the frequency of water circulating pump afterwards again;
3) the design temperature T of designated room
3,
4) by 2. E of formula
s=A ω (T
1-T
2), according to the pump rotary speed ω that records, confession, return water temperature T
1, T
2, obtain the heat E that the system water circulation provides
s,
5) by 3. E of formula
c=B (T
1+ T
2-2T
3), according to the supply and return water temperature T that records
1, T
2And indoor design temperature T
3, obtain to keeping the heat E that indoor temperature consumes in setting value
c,
6) work as E
s＜E
cThe time, then indoor actual temperature is higher than design temperature,
For heating system,
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
For refrigeration system,
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then increase the frequency of multifunctional pump 3;
7) work as E
s＞E
cThe time, then indoor actual temperature is lower than design temperature,
For heating system,
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then increase the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3;
For refrigeration system,
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates greater than matter
0The time, then reduce the frequency of water circulating pump 10,11;
When pump rotary speed ω regulates and measure the boundary flow velocity ω that regulates less than matter
0The time, then reduce the frequency of multifunctional pump 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101395118A CN102269444A (en) | 2011-05-27 | 2011-05-27 | Energy control system and method of heat supply and cold water supply circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101395118A CN102269444A (en) | 2011-05-27 | 2011-05-27 | Energy control system and method of heat supply and cold water supply circulation |
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| Publication Number | Publication Date |
|---|---|
| CN102269444A true CN102269444A (en) | 2011-12-07 |
Family
ID=45051822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101395118A Pending CN102269444A (en) | 2011-05-27 | 2011-05-27 | Energy control system and method of heat supply and cold water supply circulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102269444A (en) |
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| CN102878610A (en) * | 2012-10-29 | 2013-01-16 | 北京硕人时代科技有限公司 | Room temperature regulating method for single-pipe heat or cold supply system |
| CN103062835A (en) * | 2013-01-31 | 2013-04-24 | 天津市热电设计院 | Heat anomaly state monitoring system and heat anomaly state monitoring method for centralized heating pipe network |
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| CN103062835A (en) * | 2013-01-31 | 2013-04-24 | 天津市热电设计院 | Heat anomaly state monitoring system and heat anomaly state monitoring method for centralized heating pipe network |
| CN105829805A (en) * | 2013-12-16 | 2016-08-03 | 科瑞斯泰克韩国有限公司 | Room temperature control system |
| CN106610052A (en) * | 2015-10-23 | 2017-05-03 | 北京建筑大学 | A constant-temperature difference and variable-flow hydraulic equilibrium adjusting method and system |
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| CN114440299A (en) * | 2022-03-10 | 2022-05-06 | 浙江广涛卫厨有限公司 | Multi-energy-source combined reversing valve control system |
| CN114791165A (en) * | 2022-05-11 | 2022-07-26 | 福建工程学院 | Closed circulation system based on pressure control and method thereof |
| CN114623650A (en) * | 2022-05-17 | 2022-06-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Fine control system and fine control method for cooling water flow |
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Application publication date: 20111207 |