CN103115395B - A kind of HVAC system and flow adjustment method thereof - Google Patents
A kind of HVAC system and flow adjustment method thereof Download PDFInfo
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- CN103115395B CN103115395B CN201310065270.6A CN201310065270A CN103115395B CN 103115395 B CN103115395 B CN 103115395B CN 201310065270 A CN201310065270 A CN 201310065270A CN 103115395 B CN103115395 B CN 103115395B
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Abstract
The invention provides a kind of HVAC system and flow adjustment method thereof, belong to heating and ventilation project technical field.It solve the problem of existing HVAC system construction debugging inconvenient maintenance and flow adjustment method complexity.This HVAC system comprises for being connected with thermal substation and forming the secondary pipe network of a pipe network of closed circuit, heat exchanger and formation closed circuit, secondary pipe network have some user sides, each user side place all has control valve, a pipe network and/or secondary pipe network are parallel with the bypass pipe network that can form closed circuit, bypass pipe is parallel with some user sides on the net, each user side place all has control valve, and the incoming end of bypass pipe network has control valve.The flow adjustment method of HVAC system comprises following 4 steps: A, debugging prepare; B, debugging secondary pipe network; C, debugging bypass pipe network; D: accurately debug.This HVAC system and flow adjustment method thereof have that cost is lower, debugging accuracy advantages of higher.
Description
Technical field
The present invention relates to the flow adjustment method of a kind of HVAC system and this HVAC system.
Background technology
In order to the effective utilization to the energy, economize energy, current China is promoting heating coungting housely, according to the theory of the metering of up-to-date " heat metering technical regulation " Zhong An building of issuing for 2009 of country, the requirement of sharing by family and " make-and-break time area-method ", with the heating system water flowing time of each household for foundation, share the gross heat input of building, record simultaneously and unify the turn-on time of each family on-off valve, share whole total amount of heat of building according to the accumulative turn-on time at each family in conjunction with area of heat-supply service.But the basis of make-and-break time area-method and must condition be the water conservancy balance of heating system, due to the imbalance of flow between each family, user can be caused to ask, and use thermal effect and the gap of hot charge situation are at 20%-30%.
China's central heating develops into today, has defined certain heat supply mode.But in the face of present stage development level, traditional heat supply mode shows obviously delayed, and main manifestations is that heating quality is poor, uneven in temperature; The method of operation is unreasonable, energy waste; Heat death theory is unreasonable, charge difficulty; Planning and designing level is low, implementing of restriction energy conservation.Current China takes a series of modification measures for central heat supplying engineering, at the heat supply heating transformation initial stage, if by disposable for legacy system replacing, will cause huge waste.But it is in the face of problems such as traditional heat supply heating system equipment instrument is incomplete, conditioning equipment lacks, construction debugging inconvenient maintenance, difficult in energy saving in heating system transformation process.The present invention is directed to traditional central heat supplying system and propose solution in the difficult point of transformation, debug process, effectively can improve heat supply heating service level, reduce improvement cost energetically, make full use of existing heating equipment simultaneously, reduce the scrappage of legacy equipment.
And the carrying out for the HVAC system after completion is debugged, and is debug each valve in system, very complicated, and adjustment accuracy is not high.Its publication number of Chinese patent CN101782261A provides a kind of " nonlinear self-adapting energy-saving control method of heating ventilation air-conditioning system ", and it comprises the following steps: utilize sensor to detect the actual value of temperature and relative humidity in room; Obtain the error of temperature and RH set point and actual value respectively, carried out the input signal as adaptive controller after analog-to-digital conversion; Adaptive controller regulates the flow velocity of chilled water and the distinguished and admirable speed that enters room according to input signal simultaneously, the signal of the flow velocity exporting new chilled water and the distinguished and admirable speed that enters room; After D/A switch is carried out to the output signal of adaptive controller, act on heating ventilation air-conditioning system by executing agency; Heating ventilation air-conditioning system is according to the temperature in the Controlling model adjustment room of heating ventilation air-conditioning system and relative humidity.It needs to carry out D/A switch to signal, and the method is complicated, not easily implements.
Summary of the invention
The object of the invention is the problems referred to above existed for prior art, the HVAC system that a kind of method of operation is reasonable, heating effect is good is provided.
Another object of the present invention is to provide a kind of flow adjustment method of above-mentioned HVAC system being carried out to the HVAC system of flow debugging.
First object of the present invention realizes by following technical proposal: a kind of HVAC system, comprise for being connected with thermal substation and forming a pipe network of closed circuit, the secondary pipe network of heat exchanger and formation closed circuit, a described pipe network and secondary pipe network all part are positioned at heat exchanger place, described secondary pipe network have some user sides, described each user side place all has control valve, it is characterized in that, a described pipe network and/or secondary pipe network are parallel with the bypass pipe network that can form closed circuit, described bypass pipe is parallel with some user sides on the net, described each user side place all has control valve, the incoming end of described bypass pipe network has control valve.
This HVAC system carries out transforming on the basis of common HVAC system, comprises heating pipe network amendment, valve increase etc.That is, common pipe network and/or secondary pipe network increase some bypass pipe networks, and at the online some user sides in parallel of each relatively independent bypass pipe.Obviously, for common HVAC system, bypass network collocation is reasonable, and user side quantity rolls up, and improves the heating capacity of whole HVAC system.Optionally can be heated according to actual conditions by control valve, its applicability is higher.
In above-mentioned HVAC system, the junction of described bypass pipe network and an above-mentioned pipe network has control valve.
In above-mentioned HVAC system, the junction of described bypass pipe network and above-mentioned secondary pipe network has control valve.
Whether control valve can not only adjust flux, and can also control the bypass pipe network corresponding with it and heat.
In above-mentioned HVAC system, a described pipe network and secondary pipe network all has circulating pump.The fluid media (medium) smooth outflow in a pipe network and secondary pipe network can be made by circulating pump, promote its heating effect.
In above-mentioned HVAC system, described user side is radiator.
In above-mentioned HVAC system, described user side is floor heating circulation pipe.
No matter be adopt radiator or floor heating circulation pipe, each user heating can be given.
Another object of the present invention realizes by following technical proposal: a kind of flow adjustment method of HVAC system, and this adjustment method comprises following 4 steps:
A, debugging prepare: by all control valves in HVAC system and control valve standard-sized sheet;
B, debugging secondary pipe network: flowmeter is arranged on the return pipe of the junction of secondary pipe network and bypass pipe network, tests out the flow of each junction, regulate according to the aperture of flow to each control valve that flowmeter is measured;
C, debugging bypass pipe network: flowmeter is arranged on the return pipe of bypass pipe network, tests out the flow at each bypass pipe network users end place, regulate according to the aperture of flow to each control valve that flowmeter is measured;
D: accurately debug: after two to six debugging are carried out to step B and step C, finally the aperture of above-mentioned control valve and control valve is locked.
Because native system is transformation, when therefore there are butterfly valve or a ball valve in bypass pipe network and above-mentioned secondary pipe network place, existing butterfly valve or ball valve can be utilized according to actual conditions.According to water force and the heat load calculating of improved whole HVAC system, redesign thermal substation, make thermal substation heating load meet present stage heat demand.
During debugging, first flowmeter is installed to the return pipe place of the junction of each secondary pipe network and bypass pipe network, the aperture of each control valve is regulated.Then, flowmeter is arranged on the return pipe place of bypass pipe network, the aperture of each control valve is regulated.
Certainly, the aperture of change control valve, control valve just can change the flow corresponding with it accordingly, when Flow-rate adjustment well will keep valve opening later.Repeat after step B and step C several times until by good for the Flow-rate adjustment at each control valve and control valve place, finally the aperture of control valve and control valve is locked.
In the flow adjustment method of above-mentioned HVAC system, in described steps A, the setting flow of control valve is K times of its design load, and K is flow debugging coefficient.
In the flow adjustment method of above-mentioned HVAC system, in described steps A, the span of K is 0.7-1.
In the flow adjustment method of above-mentioned HVAC system, in described steps A, the setting flow of control valve is K times of its design load, and K is flow debugging coefficient.
In the flow adjustment method of above-mentioned HVAC system, in described steps A, the span of K is 0.7-1.
In the flow adjustment method of above-mentioned HVAC system, described flow counts the hand-held ultrasonic flowmeter with data transmitter, and above-mentioned flowmeter is sent to data and can is received by data sink and show over the display.In debug process, the flow indication of valve over the display, and commissioning staff can learn the flow at current valve place at once.
Compared with prior art, this HVAC system is owing to being carry out transforming in common existing HVAC system, and owing to having multiple user side, its heating quality is not only relatively good, and operation method is reasonable.Can not energy waste be caused after closing corresponding control valve, there is higher practical value.
, the basis of common HVAC system is transformed, this HVAC system cost being also is lower meanwhile.In addition, in this adjustment method, pipe network, a secondary pipe network are equivalent to supervisor, and bypass pipe is equivalent to time pipe, and it is repeatedly debugged according to the order of " supervisor-secondary pipe-end ", and its debugging accuracy is high.And, easy, easy to implement by its debugging of hand-held ultrasonic flowmeter.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this HVAC system.
Fig. 2 is the debugging schematic diagram of this HVAC system.
In figure, 1, pipe network; 2, secondary pipe network; 3, bypass pipe network; 4, control valve; 5, control valve; 6, circulating pump; 7, heat exchanger; 8, thermal substation; 9, user side; 10, flowmeter.
Detailed description of the invention
Embodiment one
As shown in Figure 1, this HVAC system comprises for being connected with thermal substation 8 and forming a pipe network 1 of closed circuit, heat exchanger 7 and form the secondary pipe network 2 of closed circuit, a pipe network 1 and secondary pipe network 2 all part are positioned at heat exchanger 7 place, secondary pipe network 2 has some user sides 9, each user side 9 place all has control valve 5.In the present embodiment, a pipe network 1 and secondary pipe network 2 all has circulating pump 6.
Secondary pipe network 2 is parallel with the bypass pipe network 3 that can form closed circuit, bypass pipe network 3 is parallel with some user sides 9, each user side 9 place all has control valve 5, and the incoming end of bypass pipe network 3 has control valve 4.Bypass pipe network 3 has control valve 4 with the junction of secondary pipe network 2.In the present embodiment, user side 9 is radiator, certainly, according to actual conditions user side 9 for floor heating circulation pipe is also feasible.
This HVAC system carries out transforming on the basis of common HVAC system, comprises the replacing etc. of heating pipe network amendment, valve and thermal substation.That is, common secondary pipe network 2 increases some bypass pipe networks 3, and on each relatively independent bypass pipe network 3 some user sides 9 in parallel.Obviously, for common HVAC system, bypass pipe network 3 is arranged rationally, and user side 9 quantity rolls up, and improves the heating capacity of whole HVAC system.Because user side 9 increases, therefore, original thermal substation 8 is changed to the heat station 8 that can export larger heat.One time heat is passed to heat exchanger 7 place by pipe network 1, and then heat is passed to each user side 9 by secondary pipe network 2 by heat exchanger 7.For not needing the user side 9 heated, the control valve 4 of its correspondence or control valve 5 are closed.
The flow adjustment method of this HVAC system, this adjustment method comprises the following steps:
A, debugging prepare: by all control valves 5 in HVAC system and control valve 4 standard-sized sheet.
B, debugging secondary pipe network: flowmeter 10 is arranged on secondary pipe network 2 with on the return pipe of the junction of bypass pipe network 3, tests out the flow of each junction, regulate according to the aperture of flow to each control valve 4 that flowmeter 10 is measured.In the present embodiment, flowmeter 10 is for having the hand-held ultrasonic flowmeter of data transmitter, and flowmeter 10 is sent to data and can is received by data sink and show over the display.Commissioning staff is by checking that display learns the flow of current control valve 4 easily.The Flow-rate adjustment of usual control valve 4 is K times of its setting value, and K is flow debugging coefficient.Certainly, the span of K is selected between 0.7-1 according to actual needs.
Specifically, above-mentioned flowmeter is arranged on A1, B2, C3 place of Fig. 2.
C, debugging bypass pipe network: flowmeter 10 is arranged on the return pipe of bypass pipe network 3, tests out the flow at each bypass pipe network 3 user side 9 place, regulate according to the aperture of flow to each control valve 5 that flowmeter 10 is measured.In the present embodiment, flowmeter 10 is for having the hand-held ultrasonic flowmeter of data transmitter, and flowmeter 10 is sent to data and can is received by data sink and show over the display.Commissioning staff is by checking that display learns the flow of current regulating valve 5 easily.The Flow-rate adjustment of usual control valve 5 is K times of its setting value, and K is flow debugging coefficient.Certainly, the span of K is selected between 0.7-1 according to actual needs.
Specifically, flowmeter is arranged on a1, a2, a3 and b1, b2, b3 and c1, c2, c3 place.In debug process, progressively debug a1, a2, a3 ..., b1, b2, b3 ..., c1, c2, c3 ...
D: accurately debug: after two to six debugging are carried out to step B and step C, finally the aperture of above-mentioned control valve and control valve is locked.
Embodiment two
The present embodiment with embodiment one substantially, different places is a pipe network 1 is also parallel with bypass pipe network 3.Further, four times are repeated to steps A, B.
Embodiment three
The present embodiment with embodiment one substantially, different places is a pipe network 1 and secondary pipe network 2 are all parallel with bypass pipe network 3.Further, six times are repeated to steps A, B.
Claims (4)
1. a flow adjustment method for HVAC system, this adjustment method comprises the following steps:
A, debugging prepare: by all control valves (5) in HVAC system and control valve (4) standard-sized sheet;
B, debugging secondary pipe network (2): flowmeter (10) is arranged on secondary pipe network (2) with on the return pipe of the junction of bypass pipe network (3), test out the flow of each junction, regulate according to the aperture of flow to each control valve (4) that flowmeter (10) is measured;
C, debugging bypass pipe network (3): flowmeter (10) is arranged on the return pipe of bypass pipe network (3), test out the flow at each bypass pipe network (3) user side (9) place, regulate according to the aperture of flow to each control valve (5) that flowmeter (10) is measured;
D: accurately debug: after two to six debugging are carried out to step B and step C, finally the aperture of above-mentioned control valve (5) and control valve (4) is locked.
2. the flow adjustment method of HVAC system according to claim 1, is characterized in that, in described steps A, the setting flow of control valve (4) is K times of its design load, and K is flow debugging coefficient.
3. the flow adjustment method of HVAC system according to claim 1, is characterized in that, in described steps A, the setting flow of control valve (5) is K times of its design load, and K is flow debugging coefficient.
4. the flow adjustment method of the HVAC system according to claim 1 or 2 or 3, it is characterized in that, described flowmeter (10) is for having the hand-held ultrasonic flowmeter (10) of data transmitter, and above-mentioned flowmeter (10) is sent to data and can is received by data sink and show over the display.
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| CN201310065270.6A CN103115395B (en) | 2013-03-01 | 2013-03-01 | A kind of HVAC system and flow adjustment method thereof |
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| CN201310065270.6A CN103115395B (en) | 2013-03-01 | 2013-03-01 | A kind of HVAC system and flow adjustment method thereof |
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| CN103115395A CN103115395A (en) | 2013-05-22 |
| CN103115395B true CN103115395B (en) | 2016-03-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486655B (en) * | 2013-10-14 | 2016-01-20 | 卓旦春 | A kind of HVAC system water dynamic balance debugging apparatus and adjustment method thereof |
| CN106768494A (en) * | 2016-11-22 | 2017-05-31 | 胡立聪 | A kind of heat Calculation device and HVAC system |
| CN110908413B (en) * | 2018-09-14 | 2022-07-15 | 开利公司 | Temperature controller, master controller, temperature adjusting system and control method thereof |
| CN113685890B (en) * | 2021-07-06 | 2023-07-25 | 华能国际电力股份有限公司大连电厂 | Heat supply pipe network flow regulating method |
| CN116817357B (en) * | 2023-08-30 | 2023-11-17 | 瑞纳智能设备股份有限公司 | Heating control method and device based on heating station, building and household |
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| CN201582943U (en) * | 2009-12-31 | 2010-09-15 | 北京森沃鑫达开关有限公司 | Thermal power station secondary side energy saving control system of air conditioning unit |
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| CN201954669U (en) * | 2011-01-24 | 2011-08-31 | 卓旦春 | Heat supply household-based metering branch pipeline system |
| CN102226549A (en) * | 2011-05-05 | 2011-10-26 | 何学新 | Multifunctional household-based heat metering distribution management device and metering method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201582943U (en) * | 2009-12-31 | 2010-09-15 | 北京森沃鑫达开关有限公司 | Thermal power station secondary side energy saving control system of air conditioning unit |
| CN101975416A (en) * | 2010-11-18 | 2011-02-16 | 北京乐福能节能技术有限公司 | Method and device for improving accuracy and energy-saving efficiency of 'on-off time-area process' heat allocation system |
| CN201954669U (en) * | 2011-01-24 | 2011-08-31 | 卓旦春 | Heat supply household-based metering branch pipeline system |
| CN102226549A (en) * | 2011-05-05 | 2011-10-26 | 何学新 | Multifunctional household-based heat metering distribution management device and metering method |
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