CN105352109A - Variable-air-volume air-conditioning terminal temperature control system and method based on climate compensation - Google Patents
Variable-air-volume air-conditioning terminal temperature control system and method based on climate compensation Download PDFInfo
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Abstract
The invention discloses a variable-air-volume air-conditioning terminal temperature control system and method based on climate compensation. The system comprises an upper computer, a terminal controller, a supply air temperature controller, a fresh air controller, a fresh air valve, an outdoor temperature sensor, an indoor temperature sensor, a supply air temperature sensor, an air speed sensor, a chilled water valve, a data acquisition analog input (AI) module, a data acquisition analog output (AO) module, a terminal air valve, a heat exchanger, an air blower and a variable air volume (VAV) box. The variable-air-volume air-conditioning terminal temperature control method based on climate compensation includes the steps that under the set value of each fresh air volume, a fitting curve corresponding to the fresh air volume is determined; the fitting curves and the set values of the corresponding fresh air volumes are stored in a fitting curve database; and supply air temperature set values worked out according to the fitting curves are introduced into the control system so as to carry out control. According to the variable-air-volume air-conditioning terminal temperature control system and method based on climate compensation, operation is carried out by determining the optimal supply air temperature set values corresponding to different fresh air volumes according to fresh air volume changes, requirements of indoor users, outdoor temperature changes and relations with the total energy consumption of the system, and the purpose that real-time energy consumption of the system is the minimal is achieved.
Description
Technical field
The invention belongs to air conditioning system with variable field, be specifically related to the Energy Saving Control of VAV box, particularly a kind of VAV box temperature control system based on weather compensation and method.
Background technology
Air conditioning system with variable because the indoor air quality of system is good, sub-load time energy saving superior and Region control flexible, be widely used in all kinds of office, commercial building, but it is again the energy consumption rich and influential family of modern building.It normally designs according to max calculation load, adopts fixing wind pushing temperature and the mode that changes air output is met consumers' demand, can not change wind pushing temperature setting value with the change of outdoor temperature.The size of resh air requirement affects IAQ, the size of influential system load, simultaneously the size of also influential system energy consumption.New wind is with dilution chamber's internal contamination substrate concentration, and making it to reach the acceptable concentration of user is standard.The new wind demand in region is directly proportional to user number, is directly proportional to air output.In reality, during outdoor climate, be engraved in change, directly affect the size of new wind load.If wind pushing temperature setting value can not be changed in time according to the change of outdoor temperature compensate wind pushing temperature, can cause and indoor cross cold or superheating phenomenon, can not effectively meet user under multiple weather conditions with cold/heat demand.As can be seen here, the energy-saving scheme studying a kind of air quantity variable air conditioner is imperative.
At present, the weather compensation energy-conserving control technology of central air conditioner system mainly contains two classes:
The first kind: by adjusting the operational factor of handpiece Water Chilling Units, makes central air conditioner system regulate handpiece Water Chilling Units chilled water supply water temperature to realize energy-conservation according to external climate change; Specifically climate compensation controller is by gathering indoor temperature, outdoor temperature humidity, cold running state parameter, by finding the best operating point of cold from the algorithm of optimizing, and calculate the frequency optimum traffic of each equipment of water system, control makes it to run under frequency optimum traffic, thus adjustment chilled water supply water temperature, realize energy-conservation.Such as: application number is 200810118088.1, the Chinese patent application that name is called " weather compensating controller for central air-conditioner and central air-conditioning weather compensation method ".Although the method in this application achieves the energy-conservation of water system to a certain extent, do not consider the impact of outdoor climate change on wind system.
Equations of The Second Kind: by arranging control valve on system water supply pipeline, control valve is controlled by actuator, actuator is undertaken regulating by radiator valve, radiator valve arranges thermal signal terminal, radiator valve realizes the adjustment of flow of inlet water thus control supply backwater temperature difference by the aperture controlling actuator.Such as: application number is 200910157033.6, name is called that the temperature of heating and ventilating return water of integrated weather compensation controls the patent application of power-economizing method.The method is only considered the impact of external climate change on water system equally, does not consider the impact on wind system.
Summary of the invention
Only consider that external climate change does not consider the impact on wind system to the impact of water system based on existing weather compensation energy-conserving control technology, make the problem of Energy Saving of Central Air-conditioning weak effect, the object of the invention is to, propose a kind of VAV box temperature control system based on weather compensation.
The technical solution adopted for the present invention to solve the technical problems is as follows in order to achieve the above object:
For an energy-saving control system for VAV box, comprise host computer, terminal controller, wind pushing temperature controller, new trend controller, new air-valve, outdoor temperature sensor, indoor temperature transmitter, wind pushing temperature sensor, air velocity transducer, freezing water valve, data acquisition A I module, data acquisition A O module, end air-valve, heat exchanger, pressure fan and VAVBOX17.Wherein, host computer is connected with terminal controller, wind pushing temperature controller and new trend controller; The input of terminal controller is connected with the data acquisition A I module of indoor temperature transmitter, air velocity transducer respectively, and the output of terminal controller is connected with the data acquisition A O module of end air-valve; The input of wind pushing temperature controller is connected with the data acquisition A I module of wind pushing temperature sensor, and the output of wind pushing temperature controller is connected with the data acquisition A O module of freezing water valve; The input of new trend controller is connected with the data acquisition A I module of new air-valve and outdoor temperature sensor, and the output of new trend controller is connected with the data acquisition A O module of new air-valve; The input of the data acquisition A I module that the current mode output of outdoor temperature sensor, indoor temperature transmitter, wind pushing temperature sensor, air velocity transducer is corresponding with self is respectively connected; The input of new air-valve, freezing water valve, data acquisition A I module that end air-valve voltage-type output is corresponding with self is respectively connected; The output of end air-valve voltage-type input, freezing water valve current mode input, newly the data acquisition A O module that air-valve voltage-type input is corresponding with self is respectively connected; The sensor of data acquisition A I model calling host computer and correspondence thereof, the actuating unit of data acquisition A O model calling host computer and correspondence thereof.
Described new air-valve, outdoor temperature sensor are arranged on new wind entrance airduct place; End air-valve is arranged in VAVBOX; Indoor temperature transmitter is arranged in end room; Wind pushing temperature sensor is arranged in ajutage; Air velocity transducer is arranged in the airduct of VAVBOX; Freezing water valve is arranged on heat exchanger water return pipeline.
Another object of the present invention is, provides a kind of VAV box temperature-controlled process based on weather compensation, comprises the steps:
Step 1: under the setting value of often kind of resh air requirement, determine often to organize system total power consumption minimum of a value under the combination of outdoor temperature, indoor temperature setting value and wind pushing temperature setting value, and the wind pushing temperature setting value obtained corresponding to system total power consumption minimum of a value, as optimum wind pushing temperature setting value; Using outdoor temperature and indoor temperature setting value as independent variable, using optimum wind pushing temperature setting value as dependent variable, matched curve corresponding under obtaining current resh air requirement operating mode; By the resh air requirement setting value of matched curve and correspondence thereof stored in matched curve database.
Step 2: gather current resh air requirement, finds out the matched curve corresponding with this resh air requirement from matched curve database; Gather current outdoor temperature and indoor temperature setting value, and obtain wind pushing temperature setting value by matched curve; The wind pushing temperature setting value obtained is introduced control system control.
Further, concrete steps are as follows:
Step 11: judging current resh air requirement whether in setting range, is perform step 12, otherwise terminate;
Step 12: judging current outdoor temperature whether in setting district, is perform step 13; Otherwise perform step 17;
Step 13: judging current indoor temperature setting value whether in setting district, is perform step 14; Otherwise perform step 16;
Step 14: under often kind of wind pushing temperature setting value, when system run all right, acquisition system total power consumption, obtains the wind pushing temperature setting value corresponding to system total power consumption minimum of a value, as optimum wind pushing temperature setting value; Perform step 15;
Step 15: indoor temperature setting value is improved a step-length and obtain the indoor temperature setting value after upgrading; Perform step 13;
Step 16: outdoor temperature is improved a step-length and obtain the current outdoor temperature after upgrading; Perform step 12;
Step 17: using outdoor temperature and indoor temperature setting value as independent variable, using optimum wind pushing temperature setting value as dependent variable, matched curve corresponding under obtaining current resh air requirement operating mode; By the resh air requirement of matched curve and correspondence thereof stored in matched curve database; Perform step 18;
Step 18: current resh air requirement is improved a step-length and obtain the current resh air requirement after upgrading; Perform step 11.
Further, in described step 11, described resh air requirement is not less than 10% of total air output, and namely new valve area is not less than 10%.
Further, in described step 13, the scope of described indoor temperature setting value is 18-21 DEG C.
Further, in described step 14, described wind pushing temperature setting range is 26-33 DEG C.
Further, the concrete steps of described step 2 are as follows:
Step 21: gather current resh air requirement, finds out the matched curve corresponding with this resh air requirement from matched curve database;
Step 22: gather current outdoor temperature and indoor temperature setting value, substitutes into the two in the curve found in step 21 as independent variable, obtains optimum wind pushing temperature setting value.
Step 23: the wind pushing temperature setting value obtained is introduced control system and controls.Now, the total energy consumption of system is obviously in minimum of a value.
Step 24: judge whether the control preset arrives detection time, if arrive, repeat above execution step 21-23.
Beneficial effect of the present invention is as follows:
1, weather compensation of the present invention regulates medium to be wind, new air temperature is outdoor temperature, the size of the direct influential system load of size of resh air requirement, also with regard to the size of influential system total energy consumption, so resh air requirement is very large on the impact of whole process, outdoor air volume upon indoor environmental quality has direct impact simultaneously.In the present invention, host computer determines current best wind pushing temperature setting value by the continuous monitoring of the size to current resh air requirement, outdoor temperature and the demand of user to indoor temperature, and then the aperture of water valve is controlled by wind pushing temperature controller, regulating water flow, realize the automatic climate that in air conditioning system with variable, wind pushing temperature and outdoor temperature change to compensate, reach wind pushing temperature need the change of cold/heat with user and change, realize the target of cooling on demand/heat, realize energy-conservation while guarantee cooling/hot quality.
2, existing weather compensation method is the design temperature by the cold consumption curve of building construction and user, calculates the chilling requirement of user, then calculates effective operating point of cold with the efficiency curve of handpiece Water Chilling Units.In this process, only processed the impact of outdoor temperature on water system, and do not consider the impact of outdoor temperature on wind system, and resh air requirement is on the impact of wind system.The present invention according to resh air requirement change, indoor user demand, outdoor temperature change and and system total energy consumption between relation, utilize total energy consumption minimum principle, wind pushing temperature best under determining different resh air requirement, the present invention can be used in the air conditioning system with variable control device for tail end of building automation.
The regulated quantity of the climate compensator in 3, traditional heating system is supply water temperature, and medium is water.Climate compensator in air-conditioning system is emphatically the running parameter regulating handpiece Water Chilling Units, and changes chilled water supply water temperature, thus saves the energy consumption of handpiece Water Chilling Units, and medium is water equally; And in system of the present invention, weather compensation regulated quantity is wind pushing temperature, by regulating freezing water valve to make it to reach optimal value, medium is wind.
Accompanying drawing explanation
Fig. 1 is the structural representation of the VAV box temperature control system based on weather compensation of the present invention.
Fig. 2 is host computer weather compensation Signal transmissions figure of the present invention.
Fig. 3 is the flow chart of the step 1 of control method of the present invention.
Fig. 4 is the flow chart of the step 2 of control method of the present invention.
Fig. 5 is end-of-pipe control structure chart of the present invention.
Fig. 6 is wind pushing temperature control structure figure of the present invention.
Fig. 7 is wind pushing temperature of the present invention--energy consumption graph of a relation.
Fig. 8 is weather compensation partial trace figure of the present invention.
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Detailed description of the invention
Energy-saving control system for VAV box of the present invention, comprises host computer 1, terminal controller 2, wind pushing temperature controller 3, new trend controller 4, new air-valve 5, outdoor temperature sensor 6, indoor temperature transmitter 7, wind pushing temperature sensor 8, air velocity transducer 9, freezing water valve 10, data acquisition A I module 11, data acquisition A O module 12, end air-valve 13, heat exchanger 14, pressure fan 15 and VAVBOX16.Wherein, host computer 1 is connected with terminal controller 2, wind pushing temperature controller 3 and new trend controller 4; Heat exchanger 14 and pressure fan 15 are positioned at air-treatment unit; The input of terminal controller 2 is connected with the data acquisition A I module 11 of indoor temperature transmitter 7, air velocity transducer 9 respectively, and the output of terminal controller 2 is connected with the data acquisition A O module 12 of end air-valve 13; The input of wind pushing temperature controller 3 is connected with the data acquisition A I module 11 of wind pushing temperature sensor 8, and the output of wind pushing temperature controller 3 is connected with the data acquisition A O module 12 of freezing water valve 10; The input of new trend controller 4 is connected with the data acquisition A I module 11 of new air-valve 5 and outdoor temperature sensor 6, and the output of new trend controller 4 is connected with the data acquisition A O module 12 of new air-valve 5; The input of the data acquisition A I module 11 that the current mode output of outdoor temperature sensor 6, indoor temperature transmitter 7, wind pushing temperature sensor 8, air velocity transducer 9 is corresponding with self is respectively connected; The input of new air-valve 5, freezing water valve 10, data acquisition A I module 11 that end air-valve 13 voltage-type output is corresponding with self is respectively connected; The output of end air-valve 13 voltage-type input, freezing water valve 10 current mode input, newly the data acquisition A O module 12 that air-valve 5 voltage-type input is corresponding with self is respectively connected.
New air-valve 5, outdoor temperature sensor 6 are arranged on new wind entrance airduct place; End air-valve 13 is arranged in VAVBOX16; Indoor temperature transmitter 7 is arranged in end room; Wind pushing temperature sensor 8 is arranged in ajutage; Air velocity transducer 9 is arranged in the airduct of VAVBOX16, for detecting the air quantity entering room; Freezing water valve 10 is arranged on heat exchanger water return pipeline; Heat exchanger connects heat exchanger 14 and water system 17 for water return pipeline.The signal of outdoor temperature sensor 6, indoor temperature transmitter 7, wind pushing temperature sensor 8, air velocity transducer 9, new air-valve 5, freezing water valve 10 and end air-valve 13, respectively by data acquisition A I module 11 and data acquisition A O module 12 by data upload to computer; The data such as the parameter that all the sensors detects, actuator position, control signal realize data sharing by OPC technology; Data message is monitored in real time by host computer, and shares with terminal controller 2, wind pushing temperature controller 3, new trend controller 4 simultaneously.
Weather compensation diagram database is loaded with in host computer, under this databases stores up different resh air requirement operating mode, different outdoor temperature, best wind pushing temperature setting value curve in different chamber under desired temperature, host computer judges to select which bar curve according to current resh air requirement, then determines current best wind pushing temperature setting value according to indoor temperature setting value and outdoor temperature.
New trend controller 4 is for regulating the given resh air requirement of new valve area according to the actual requirements; Wind pushing temperature controller 3, for according to the determined best wind pushing temperature setting value of weather compensation diagram database, provides control signal to regulate the aperture of freezing water valve 10, thus makes wind pushing temperature reach setting value; Terminal controller 2 comprises outer shroud temperature controller and inner ring blast volume controller, and temperature controller is according to the difference given air quantity setting value of indoor temperature setting value with the room actual temperature detected by indoor temperature transmitter; Blast volume controller, according to the difference of the output of temperature controller with the actual air output in room detected by air velocity transducer 11, controls the aperture of end air-valve 13, regulates the discharge quantity of fan of end air-valve, realizes the adjustment of end room temperature.
Fig. 1 is the VAV Box System structural representation based on weather compensation, and Fig. 2 is host computer weather compensation Signal transmissions figure of the present invention.
VAV box temperature-controlled process based on weather compensation of the present invention comprises the steps:
Step 1: under the setting value of often kind of resh air requirement, determine often to organize system total power consumption minimum of a value under the combination of outdoor temperature, indoor temperature setting value and wind pushing temperature setting value, and the wind pushing temperature setting value obtained corresponding to system total power consumption minimum of a value, as optimum wind pushing temperature setting value; Using outdoor temperature and indoor temperature setting value as independent variable, using optimum wind pushing temperature setting value as dependent variable, matched curve corresponding under obtaining current resh air requirement operating mode; By the resh air requirement setting value of matched curve and correspondence thereof stored in matched curve database.Concrete steps are as follows:
Step 11: judging current resh air requirement whether in setting range, is perform step 12, otherwise terminate.
Optionally, above-mentioned judge current resh air requirement whether in setting range at middle finger of the present invention: judge whether resh air requirement is not less than 10% (namely new valve area is not less than 10%) of total air output.The aperture of new air-valve is recorded by the data acquisition A I module of its correspondence.Resh air requirement is arranged according to GB-5073b-2012 " heating and ventilation and In Air Conditioning Design specification ", requires different, be not less than 10% of total air output under varying environment.
Step 12: judging current outdoor temperature whether in setting district, is perform step 13; Otherwise, perform step 17;
According to the regulation of " climate region of building ", for northwest China, under winter condition, outdoor temperature scope is-10 ~ 15 DEG C, and Annual lowest climate temperature is between-20 ~-30 DEG C; Under summer condition, the scope of above-mentioned outdoor temperature is 18 ~ 28 DEG C, Extreme Maximum Temperature 35 ~ 44 DEG C.
Step 13: judging current indoor temperature setting value whether in setting district, is perform step 14; Otherwise perform step 16;
Optionally, the scope of above-mentioned indoor temperature setting value is 18 ~ 21 DEG C.(be the indoor temperature range of winter condition civil buildings comfort level corresponding to II level herein, arrange according to GB-5073b-2012 " heating and ventilation and In Air Conditioning Design specification ".)
Step 14: under often kind of wind pushing temperature setting value, when system run all right, acquisition system total power consumption, obtains the wind pushing temperature setting value corresponding to system total power consumption minimum of a value, as optimum wind pushing temperature setting value; Perform step 15;
Optionally, above-mentioned wind pushing temperature setting range should not be greater than 10 DEG C according to the maximum supply air temperature difference in comfort air conditioning system room in GB-5073b-2012 " heating and ventilation and In Air Conditioning Design specification " and set, and setting range is 26 ~ 33 DEG C.
Step 15: indoor temperature setting value is improved a step-length and obtain the indoor temperature setting value after upgrading; Perform step 13;
Step 16: outdoor temperature is improved a step-length and obtain the current outdoor temperature after upgrading; Perform step 12.
Step 17: using outdoor temperature and indoor temperature setting value as independent variable, using optimum wind pushing temperature setting value as dependent variable, matched curve corresponding under obtaining current resh air requirement operating mode; By the resh air requirement of matched curve and correspondence thereof stored in matched curve database; Perform step 18;
Step 18: current resh air requirement is improved a step-length and obtain the current resh air requirement after upgrading; Perform step 11.
Therefore, under often kind of resh air requirement operating mode, equal correspondence obtains a matched curve, this matched curve represents the linear relationship of outdoor temperature and indoor temperature setting value and wind pushing temperature setting value, thus next namely can realize under often kind of resh air requirement operating mode, a wind pushing temperature setting value is obtained according to outdoor temperature and indoor temperature setting value, use this wind pushing temperature set value calculation system cloud gray model, then obviously can ensure that the energy consumption of system cloud gray model is minimum all the time.
The flow chart of step 1 as shown in Figure 3.
Step 2: gather current resh air requirement, finds out the matched curve corresponding with this resh air requirement from matched curve database; Gather current outdoor temperature and indoor temperature setting value, and obtain wind pushing temperature setting value by matched curve; The wind pushing temperature setting value obtained is introduced control system control.Concrete steps are as follows:
Step 21: gather current resh air requirement, finds out the matched curve corresponding with this resh air requirement from matched curve database;
Step 22: gather current outdoor temperature and indoor temperature setting value, substitutes into the two in the curve found in step 21 as independent variable, obtains wind pushing temperature setting value.
Step 23: the wind pushing temperature setting value obtained is introduced control system and controls.Now, the total energy consumption of system is obviously in minimum of a value.
Step 24: judge whether the control preset arrives detection time, if arrive, repeat above execution step 21-23.
The flow chart of step 2 as shown in Figure 4.
Embodiment
Be below an embodiment of method of the present invention, the object providing this embodiment is to be illustrated more clearly in the specific embodiment of the present invention, and invention which is intended to be protected is not limited to this embodiment.
Setting resh air requirement in step 11 is minimum fresh air requirmente (namely setting new valve area is 10%), and gather current outdoor temperature in step 12, in step 13, given indoor temperature setting value is 19 DEG C, and indoor temperature passes through end-of-pipe control circuit controls, as Fig. 5; In step 14, wind pushing temperature setting value changes within the scope of 26-29 DEG C, and wind pushing temperature is controlled, as Fig. 6 by wind pushing temperature control loop.In Fig. 6, temperature controller and blast volume controller are integrated in one piece of composition terminal controller.After system closed-loop stabilization runs, under obtaining concrete outdoor temp angle value, (outdoor temperature is 0 DEG C) wind pushing temperature setting value and system total energy consumption relation curve are as Fig. 7.In Fig. 7, with the increase of wind pushing temperature setting value, the wind pushing temperature setting value corresponding to total energy consumption minimization value point of system is the optimum wind pushing temperature setting value under this operating mode.In this experimental system, optimum wind pushing temperature setting value system total energy consumption more energy-conservation than peak 35.5%.Outdoor temperature scope is-1 ~ 3 DEG C, when indoor setting value is 19 DEG C, and the matched curve obtaining as shown in Figure 8 according to step 17: y=1.3923x
1+ 0.5594x
2, wherein, x
1for indoor temperature setting value, x
2for outdoor temperature, y is optimum wind pushing temperature setting value.
Above-mentioned indoor temperature setting value is set by end room control panel, experimental system end of the present invention is pressure independent type, and indoor temperature is by end-of-pipe control loop double-closed-loop control, and control loop is as Fig. 5, main ring is temperature control loop, and inner loop is Boiler pressure control loop.The difference of the indoor actual temperature being input as indoor temperature setting value and being detected by indoor temperature transmitter of temperature controller, exports as air quantity setting value; The output being input as temperature controller of blast volume controller and the difference of the actual air output in room detected by air flow sensor, export the aperture for end air-valve, by regulating the discharge quantity of fan (namely sending into the air quantity in room) of end air-valve, realize the adjustment of end room temperature.
Above-mentioned wind pushing temperature is controlled by wind pushing temperature control loop, as shown in Figure 6, its control principle is the input of difference as wind pushing temperature controller of the actual wind pushing temperature measured using wind pushing temperature setting value and wind pushing temperature sensor, and the discharge changing heat exchanger by the aperture of water valve freezing in regulating system realizes the control to wind pushing temperature.
Comprehensive different time sections is to the different requirements of indoor temperature, in weather compensation diagram database under presetting different resh air requirement, outdoor temperature, indoor temperature setting value, optimum wind pushing temperature setting value curve, make control system wind pushing temperature setting value change with outdoor temperature under different terminal temperature difference condition.Thus meet the requirement of different outdoor temperature, different time sections room temperature, accomplish that timesharing heats, heat as required, reach comfortable, energy-conservation object.
During central air-conditioning refrigerating/heating, because of the change of various condition, the change of weather is not very regular, host computer is according to current resh air requirement determination homologous thread, outdoor temperature sensor Real-time Collection outdoor temperature, this temperature signal is transferred to host computer, and host computer, according to the indoor temperature setting value of outdoor temperature and user, finds wind pushing temperature setting value now in weather compensation database; Wind pushing temperature controller regulates chilled water valve opening according to the deviation of its wind pushing temperature setting value and actual wind pushing temperature, change the discharge of heat exchanger, realize the control to wind pushing temperature, with the impact of variations in temperature outside compensated chamber, obtain optimum reelability quality and minimum energy resource consumption.
Information in weather compensation method employing Practical Project of the present invention during system testing in database carries out statistical analysis, can enrich database gradually with system operation time is cumulative.
Claims (7)
1. the VAV box temperature control system based on weather compensation, it is characterized in that, comprise host computer, terminal controller, wind pushing temperature controller, new trend controller, new air-valve, outdoor temperature sensor, indoor temperature transmitter, wind pushing temperature sensor, air velocity transducer, freezing water valve, data acquisition A I module, data acquisition A O module, end air-valve, heat exchanger, pressure fan and VAVBOX.
Wherein, host computer is connected with terminal controller, wind pushing temperature controller and new trend controller; The input of terminal controller is connected with the data acquisition A I module of indoor temperature transmitter, air velocity transducer respectively, and the output of terminal controller is connected with the data acquisition A O module of end air-valve; The input of wind pushing temperature controller is connected with the data acquisition A I module of wind pushing temperature sensor, and the output of wind pushing temperature controller is connected with the data acquisition A O module of freezing water valve; The input of new trend controller is connected with the data acquisition A I module of new air-valve and outdoor temperature sensor, and the output of new trend controller is connected with the data acquisition A O module of new air-valve; The input of the data acquisition A I module that the current mode output of outdoor temperature sensor, indoor temperature transmitter, wind pushing temperature sensor, air velocity transducer is corresponding with self is respectively connected; The input of new air-valve, freezing water valve, data acquisition A I module that end air-valve voltage-type output is corresponding with self is respectively connected; The output of end air-valve voltage-type input, freezing water valve current mode input, newly the data acquisition A O module that air-valve voltage-type input is corresponding with self is respectively connected; Data acquisition A I module and data acquisition A O model calling host computer;
Described new air-valve, outdoor temperature sensor are arranged on new wind entrance airduct place; End air-valve is arranged in VAVBOX; Indoor temperature transmitter is arranged in end room; Wind pushing temperature sensor is arranged in ajutage; Air velocity transducer is arranged in the airduct of VAVBOX; Freezing water valve is arranged on heat exchanger water return pipeline.
2., based on a VAV box temperature-controlled process for weather compensation, it is characterized in that, comprise the steps:
Step 1: under the setting value of often kind of resh air requirement, determine often to organize system total power consumption minimum of a value under the combination of outdoor temperature, indoor temperature setting value and wind pushing temperature setting value, and the wind pushing temperature setting value obtained corresponding to system total power consumption minimum of a value, as optimum wind pushing temperature setting value; Using outdoor temperature and indoor temperature setting value as independent variable, using optimum wind pushing temperature setting value as dependent variable, matched curve corresponding under obtaining current resh air requirement operating mode; By the resh air requirement setting value of matched curve and correspondence thereof stored in matched curve database.
Step 2: gather current resh air requirement, finds out the matched curve corresponding with this resh air requirement from matched curve database; Gather current outdoor temperature and indoor temperature setting value, and obtain wind pushing temperature setting value by matched curve; The wind pushing temperature setting value obtained is introduced control system control.
3., as claimed in claim 2 based on the VAV box temperature-controlled process of weather compensation, it is characterized in that, concrete steps are as follows:
Step 11: judging current resh air requirement whether in setting range, is perform step 12; Otherwise terminate.
Step 12: judging current outdoor temperature whether in setting district, is perform step 13; Otherwise, perform step 17;
Step 13: judging current indoor temperature setting value whether in setting district, is perform step 14; Otherwise perform step 16;
Step 14: under often kind of wind pushing temperature setting value, when system run all right, acquisition system total power consumption, obtains the wind pushing temperature setting value corresponding to system total power consumption minimum of a value, as optimum wind pushing temperature setting value; Perform step 15;
Step 15: indoor temperature setting value is improved a step-length and obtain the indoor temperature setting value after upgrading; Perform step 13;
Step 16: outdoor temperature is improved a step-length and obtain the current outdoor temperature after upgrading; Perform step 12;
Step 17: using outdoor temperature and indoor temperature setting value as independent variable, using optimum wind pushing temperature setting value as dependent variable, matched curve corresponding under obtaining current resh air requirement operating mode; By the resh air requirement of matched curve and correspondence thereof stored in matched curve database; Perform step 18;
Step 18: current resh air requirement is improved a step-length and obtain the current resh air requirement after upgrading; Perform step 11.
4., as claimed in claim 3 based on the VAV box temperature-controlled process of weather compensation, it is characterized in that, in described step 11, described resh air requirement is not less than 10% of total air output.
5., as claimed in claim 3 based on the VAV box temperature-controlled process of weather compensation, it is characterized in that, in described step 13, the scope of described indoor temperature setting value is 18-21 DEG C.
6., as claimed in claim 3 based on the VAV box temperature-controlled process of weather compensation, it is characterized in that, in described step 14, described wind pushing temperature setting range is 26-33 DEG C.
7., as claimed in claim 3 based on the VAV box temperature-controlled process of weather compensation, it is characterized in that, the concrete steps of described step 2 are as follows:
Step 21: gather current resh air requirement, finds out the matched curve corresponding with this resh air requirement from matched curve database;
Step 22: gather current outdoor temperature and indoor temperature setting value, substitutes into the two in the curve found in step 21 as independent variable, obtains optimum wind pushing temperature setting value;
Step 23: the wind pushing temperature setting value obtained is introduced control system and controls.Now, the total energy consumption of system is obviously in minimum of a value;
Step 24: judge whether the control preset arrives detection time, if arrive, repeat above execution step 21-23.
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| CN106885338A (en) * | 2017-02-23 | 2017-06-23 | 林兴斌 | Multi-region variable air volume central air-conditioner system resh air requirement and air conditioning terminal air quantity real-time control method |
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| CN117128626A (en) * | 2023-07-21 | 2023-11-28 | 江森自控日立万宝空调(广州)有限公司 | Self-adaptive adjusting method for cooling mode of natural cooling air conditioning unit |
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