CN106500220A - Determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water - Google Patents
Determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water Download PDFInfo
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- CN106500220A CN106500220A CN201611063086.8A CN201611063086A CN106500220A CN 106500220 A CN106500220 A CN 106500220A CN 201611063086 A CN201611063086 A CN 201611063086A CN 106500220 A CN106500220 A CN 106500220A
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- Prior art keywords
- radiant panel
- surface temperature
- panel surface
- closing
- water
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0089—Systems using radiation from walls or panels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The present invention relates to a kind of determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water, including step：According to radiation cooling air-conditioning system actual motion condition, the excursion of the influence factor and each factor of the change of radiant panel surface temperature is determined；According to the influence factor and the excursion of each factor of the radiant panel surface temperature Changing Pattern for determining, radiant panel table temperature situation of change when closing with supplying water under ANSYS softwares simulation different affecting factors, sample data is obtained；SAS softwares are based on, with statistical analysis program sample data regression analysis, radiant panel surface temperature variation prediction model when closing that supplies water is obtained.The accuracy that predicts the outcome that regression analysis of the present invention is obtained is higher, and control system is simple, it is possible to achieve real-time control, suitably applies in the control of residential buildings system.
Description
Technical field
The invention belongs to radiation cooling technical field, and in particular to determine radiation cooling system radiant panel table when closing that supplies water
The method of face temperature change.
Background technology
Radiation cooling air-conditioning system is compared with traditional air-conditioning system, good with comfortableness, and without blowing feeling, noiselessness is indoor
Uniform distribution of temperature field, the advantage of energy-conservation.Radiation cooling air-conditioning system achieves independent temperature-humidity control, solves humiture coupling
Close the energy waste problem for causing.Under identical thermal and humidity environment, using radiation cooling air-conditioning system, human thermal comfort sense is identical
On the premise of, 1-2 DEG C of indoor design temperature can be improved.At present, the supply water temperature of China's radiation cooling air-conditioning system is generally
16 DEG C, return water temperature is 18 DEG C, and therefore, radiation cooling air-conditioning system provides possibility for the utilization of low-grade low-temperature receiver, presents
The advantage of its energy-conservation.Based on radiation cooling air conditioner system energy saving and comfortable advantage, environmental problem is solved, response country sets up money
Source economizing type and environmentally friendly strategy, radiation cooling air-conditioning system become the first-selected air-conditioning of low energy building and green building
One of system form, has broad application prospects.
Compared with traditional air-conditioning system, radiation cooling air-conditioning system has large-area cold emission surface, and therefore condensation is
Its maximum problem.In radiation cooling air-conditioning system, there is condensation, radiant panel surface temperature and patch to prevent cold emission face
Attached layer dew-point temperature needs certain temperature difference, i.e., the safe temperature difference.When radiant panel surface temperature little with the difference of associated layer dew-point temperature
When the safe temperature difference for setting, the cold surface of air-conditioning system just occurs the risk of condensation.Empty in actual radiation cooling
In adjusting system, the safe temperature difference is set, is typically immobilized, and when indoor humidity load increases suddenly, need to adjust water supply flow
Or raising supply water temperature carrys out anti-condensation.Therefore, in research radiation cooling room moisture diffusion property, humidity hierarchical nature and patch
On the basis of attached layer dew-point temperature dynamic change, it is necessary to disclose and close radiant panel surface temperature Changing Pattern when supplying water, be spoke
Cold surface anti-condensation offer technical support for cold air conditioning system is provided.
Content of the invention
It is an object of the invention to solving above-mentioned technical problem and providing radiation cooling system when a kind of determination water supply is closed
The method of system radiant panel surface temperature change.
For achieving the above object, the present invention is adopted the following technical scheme that：
Determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water, comprise the following steps：
1) according to radiation cooling air-conditioning system actual motion condition, determine radiant panel surface temperature change influence factor and
The excursion of each factor；
2) according to step 1) influence factor of radiant panel surface temperature Changing Pattern that determines and the excursion of each factor,
Radiant panel table temperature situation of change when closing with supplying water under ANSYS softwares simulation different affecting factors, obtains sample data；
3) SAS softwares are based on, with statistical analysis program to step 2) sample data that obtains carries out regression analysis and obtains
Supply water radiant panel surface temperature variation prediction model when closing.
Step 1) in, the influence factor of the radiant panel surface temperature change includes indoor environment temperature ta, table in exterior window
Face temperature twin, non-cooling inner surface mean temperature taverage.
Wherein, radiant panel surface temperature variation prediction model when closing that supplies water is as follows：
tp=0.13208 τ+0.49030ta+0.23469taverage+0.04502twin+2.4566
tpFor radiant panel surface temperature, unit DEG C,
τ be radiant panel water supply flow closing after time τ ∈ [0,40], unit min,
taFor indoor environment temperature, unit DEG C,
taverageFor non-cooling average surface temperature, unit DEG C,
twinFor exterior window internal surface temperature, unit DEG C.
The present invention passes through the shadow for determining the change of radiant panel surface temperature according to radiation cooling air-conditioning system actual motion condition
The factor of sound and the excursion of each factor, radiant panel when then closing with supplying water under ANSYS softwares simulation different affecting factors
Table temperature situation of change, obtains sample data, then is based on SAS softwares, with sample data of the statistical analysis program to acquisition
Regression analysis being carried out, forecast model being determined to obtain radiant panel surface temperature Changing Pattern when water supply is closed, regression analysis is obtained
The accuracy that predicts the outcome higher, control system is simple, it is possible to achieve real-time control, suitably residential buildings system control
Middle application；When humidity load is may be implemented in this forecast model and increasing suddenly, determine the Best Times for closing water supply flow, and
The Best Times close water supply flow effectively to prevent from condensing, and can give full play to the cooling ability of system, reduce energy dissipation.
Description of the drawings
Fig. 1 is radiation cooling system schematic；
Fig. 2 is radiant panel surface temperature versus time curve figure when Water supply switch valve is adjusted.
Specific embodiment
Below, the substantive distinguishing features of the present invention and advantage are further described in conjunction with example, but the present invention not office
It is limited to listed embodiment.
Shown in Figure 1, radiation cooling system of the present invention, including radiant panel, the circulation waterway with the radiant panel
The water inlet of the plate type heat exchanger 4 of connection, wherein plate type heat exchanger 4 connects a delivery port of water knockout drum, water knockout drum another
Individual delivery port connects the water inlet of Fresh air handling units, and the delivery port of handpiece Water Chilling Units connects the water inlet of water knockout drum, and water knockout drum is by cold water
The moisture of unit is exchanged heat to plate type heat exchanger and Fresh air handling units；The water return outlet of plate type heat exchanger 4, Fresh air handling units respectively with
Two backwater water inlet connections of water collector, the water return outlet of handpiece Water Chilling Units connect the backwater delivery port of water collector, water collector respectively
Backwater from Fresh air handling units with plate type heat exchanger is returned to handpiece Water Chilling Units；The circulatory system formed above.
The present invention seeks to, for above-mentioned radiation cooling system, determine its radiant panel surface temperature when closing is supplied water
Changing Pattern.
Time, indoor ring after radiant panel surface temperature is closed with radiant panel water supply flow when the present invention is supplied water by closing
Interaction relationship between border temperature, indoor non-cooling average surface temperature and exterior window internal surface temperature, with experiment and numerical value
Analog result is sample data, with the multi-variate statistical analysis based on SAS, proposes to supply water with the method for linear regression after closing
Radiant panel surface temperature variation prediction model, the rule of radiant panel surface temperature change when supplying water closing so as to obtain.
Specifically, the present invention is carried out using following methods：
1) determine the influence factor of radiant panel surface temperature change
Because different thermal environment parameters are depended primarily on affects significant factor to radiant panel surface temperature, it is thus determined that not
With under thermal environment parameter by close water supply anti-condensation when radiant panel surface temperature Changing Pattern, need to consider radiate plate surface temperature
The influence factor of degree Changing Pattern.
From the heat exchange angle analysis of radiant panel, the factor of radiant panel surface temperature is affected to be roughly divided into three parts：Water supply side
Factor, capillary network radiant panel side factor and indoor and outdoor surroundingses side factor.
(1) the water supply side factor of radiant panel surface temperature change is affected to have：The physical parameter of water, supply water temperature, backwater temperature
Degree.Radiant panel return water temperature is changed with supply water temperature, and therefore both are non-independent variables, and supply and return water temperature difference is general to be kept
At 2 DEG C, the physical parameter of water is varied less within this range, and can ignore which affects.
(2) the capillary network radiant panel side factor of radiant panel surface temperature change is affected to have：Capillary and radiant panel are led
Hot coefficient, capillary caliber, tube pitch radiate plate thickness, and the synthesis between indoor environment temperature and radiant panel and indoor environment is changed
Hot coefficient.These parameters are all relevant with the installation of radiant panel, and therefore, its impact to radiant panel surface temperature can be considered constant.
(3) the indoor and outdoor surroundingses side factor of radiant panel surface temperature is affected to have：Indoor environment temperature ta, exterior window inner surface temperature
Degree twin, non-cooling inner surface mean temperature taverage.
To sum up, the influence factor and excursion of radiant panel surface temperature Changing Pattern can be drawn, is see the table below.
Illustrate, indoor environment temperature taCivilian office Interior design of architecture parameter is taken according in design of HVAC specification
Value, exterior window internal surface temperature twinTemperature value is calculated according to outside test Area during Summer room, non-cooling average surface temperature (is not wrapped
Contain exterior window) taverageWith reference to non-cooling surface area weighted mean AUST value in ASHRAE.
2) sample data is obtained using the simulation of ANSYS softwares
By analysis above as can be seen that affecting the factor of indoor thermal environment numerous, and influence each other between each factor.Foundation
The analysis of experimental bench and influence factor that existing radiant panel is fixed, determines experimental technique.According to the experimental program for determining, use
The situation of change of radiant panel surface temperature and reach stable state (i.e. temperature does not go out under ANSYS softwares simulation different affecting factors
Now fluctuate) the time required to, so as to obtain sample data.
ANSYS softwares are modular dynamic simulation programs, when analyzing to system simulation, as long as realizing these by calling
The module of specific function, gives suitable boundary condition and primary condition, so that it may be simulated analysis to the dynamic change of system.
Different experiment conditions can be just realized only by change boundary condition and primary condition.
3) SAS softwares are based on, regression analysis is carried out to sample data with statistical analysis program, obtain to supply water and close anti-caking
The forecast model of radiant panel surface temperature change during dew.
Through returning, the regression equation goodness of fit coefficient of determination and the correction goodness of fit coefficient of determination are respectively 0.8793 He
0.8785, degree of fitting is higher.
When the water supply for finally obtaining is closed, radiant panel surface temperature variation prediction model is as follows：
tp=0.13208 τ+0.49030ta+0.23469taverage+0.04502twin+2.4566
tpFor radiant panel surface temperature, unit DEG C,
τ be radiant panel water supply flow closing after time τ ∈ [0,40], unit min,
taFor indoor environment temperature, unit DEG C,
taverageFor non-cooling average surface temperature, unit DEG C,
twinFor exterior window internal surface temperature, unit DEG C.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water is determined, it is characterised in that including following
Step：
1) according to radiation cooling air-conditioning system actual motion condition, determine radiant panel surface temperature change influence factor and each because
The excursion of element；
2) according to step 1) influence factor of radiant panel surface temperature Changing Pattern that determines and the excursion of each factor, use
Supply water under ANSYS softwares simulation different affecting factors radiant panel table temperature situation of change when closing, and obtains sample data；
3) SAS softwares are based on, with statistical analysis program to step 2) sample data that obtains carries out regression analysis and supplied water
Radiant panel surface temperature variation prediction model during closing.
2. the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water is determined according to claim 1, its
It is characterised by, step 1) in, the influence factor of the radiant panel surface temperature change includes indoor environment temperature ta, table in exterior window
Face temperature twin, non-cooling inner surface mean temperature taverage.
3. supply water the side that radiation cooling system radiant panel surface temperature changes when closing according to the determination of claim 1 or 2
Method, it is characterised in that radiant panel surface temperature variation prediction model is as follows when the water supply is closed：
tp=0.13208 τ+0.49030ta+0.23469taverage+0.04502twin+2.4566
tpFor radiant panel surface temperature, unit DEG C,
τ be radiant panel water supply flow closing after time τ ∈ [0,40], unit min,
taFor indoor environment temperature, unit DEG C,
taverageFor non-cooling average surface temperature, unit DEG C,
twinFor exterior window internal surface temperature, unit DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611063086.8A CN106500220B (en) | 2016-11-28 | 2016-11-28 | Determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water |
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| CN201611063086.8A CN106500220B (en) | 2016-11-28 | 2016-11-28 | Determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water |
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| Publication Number | Publication Date |
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| CN106500220A true CN106500220A (en) | 2017-03-15 |
| CN106500220B CN106500220B (en) | 2019-07-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255331A (en) * | 2017-07-26 | 2017-10-17 | 天津商业大学 | The method for determining relation between radiant panel surface temperature and each factor of influence |
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| CN102538142A (en) * | 2012-01-18 | 2012-07-04 | 曼瑞德自控系统（乐清）有限公司 | Radiating and air conditioning cold-heat integrated system |
| JP2015094122A (en) * | 2013-11-12 | 2015-05-18 | 沖電気工業株式会社 | Water level prediction device, water level prediction method and water level prediction system |
| CN104866693A (en) * | 2015-06-19 | 2015-08-26 | 天津商业大学 | Optimal stop time prediction model of floor-radiating heating system |
| CN105404771A (en) * | 2015-11-06 | 2016-03-16 | 天津商业大学 | Method for determining dynamic change rule of dew point temperature of attached layer of radiant ceiling |
-
2016
- 2016-11-28 CN CN201611063086.8A patent/CN106500220B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538142A (en) * | 2012-01-18 | 2012-07-04 | 曼瑞德自控系统（乐清）有限公司 | Radiating and air conditioning cold-heat integrated system |
| JP2015094122A (en) * | 2013-11-12 | 2015-05-18 | 沖電気工業株式会社 | Water level prediction device, water level prediction method and water level prediction system |
| CN104866693A (en) * | 2015-06-19 | 2015-08-26 | 天津商业大学 | Optimal stop time prediction model of floor-radiating heating system |
| CN105404771A (en) * | 2015-11-06 | 2016-03-16 | 天津商业大学 | Method for determining dynamic change rule of dew point temperature of attached layer of radiant ceiling |
Non-Patent Citations (1)
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| 黎丽华等: "地板辐射供冷系统的控制性能", 《制冷与空调》 * |
Cited By (1)
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|---|---|---|---|---|
| CN107255331A (en) * | 2017-07-26 | 2017-10-17 | 天津商业大学 | The method for determining relation between radiant panel surface temperature and each factor of influence |
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| CN106500220B (en) | 2019-07-02 |
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Granted publication date: 20190702 Termination date: 20191128 |