CN107255331A - The method for determining relation between radiant panel surface temperature and each factor of influence - Google Patents
The method for determining relation between radiant panel surface temperature and each factor of influence Download PDFInfo
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- CN107255331A CN107255331A CN201710615509.0A CN201710615509A CN107255331A CN 107255331 A CN107255331 A CN 107255331A CN 201710615509 A CN201710615509 A CN 201710615509A CN 107255331 A CN107255331 A CN 107255331A
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- surface temperature
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of method for determining relation between radiant panel surface temperature and each factor of influence.The present invention is comprised the following steps that：Radiant panel surface temperature and the relation of factor of influence when water supply flow and supply water temperature are design load are determined first；Then sample data is obtained using the simulation of ANSYS softwares；It is finally based on above-mentioned sample data, regression analysis acquisition is carried out using SAS softwares, the relational expression when supply water temperature and water supply flow are design load between capillary network radiant panel average surface temperature and indoor temperature, non-cooling surface temperature and exterior window internal surface temperature.The present invention can determine that the relation between radiation plate surface and factor of influence, can give full play to the cooling ability of system, reduce energy dissipation.
Description
Technical field
The present invention relates to radiation cooling technical field, it is related to a kind of determination radiant panel surface temperature and each factor of influence
Relation.
Background technology
Radiation cooling air-conditioning system compared with traditional air-conditioning system, with two greatly prominent advantage be energy saving with it is comfortable
Property.Radiation cooling air-conditioning system realizes independent temperature-humidity control, solves the problems, such as the energy waste that humiture coupling is caused.
Under identical thermal and humidity environment, using radiation cooling air-conditioning system, under the premise of human thermal comfort sense identical, interior can be improved and set
Count 1-2 DEG C of temperature.At present, the supply water temperature of China's radiation cooling air-conditioning system is generally 16 DEG C, and return water temperature is 18 DEG C, because
This, radiation cooling air-conditioning system provides possibility for the utilization of low-grade low-temperature receiver, presents the advantage of its energy-conservation.Supplied based on radiation
Cold air conditioning system energy-conservation and comfortable advantage, solve environmental problem, and response country sets up resource-conserving and environmentally friendly
Strategy, radiation cooling air-conditioning system turns into one of preferred air conditioning system of low energy building and green building, with wide
Application prospect.
Compared with traditional air-conditioning system, radiation cooling air-conditioning system possesses the cold emission surface of large area, therefore condensation is
The problem of its is maximum.In radiation cooling air-conditioning system, in order to prevent cold emission face from condensing, radiant panel surface temperature and patch
Attached layer dew-point temperature needs certain temperature difference, i.e., the safe temperature difference.When the difference of radiant panel surface temperature and associated layer dew-point temperature is small
When the safe temperature difference of setting, the risk of condensation just occurs in the cold surface of air-conditioning system.For research radiant panel table comprehensively
The change of face temperature dynamic, should find out from point of theory on the influential factor of radiant panel surface temperature, analyze between each factor
Correlation, it is determined that the principal element of influence radiant panel surface temperature, and the span of each factor of influence is analyzed, for experiment and mould
Intend research to lay the foundation.
Analyze the heat exchange principle of radiant ceiling cooling system and the determination of each link heat exchange amount and the coefficient of heat transfer.Radiation
Plate includes with surrounding environment heat transfer process：Heat convection between cold water and capillary tube inner wall, capillary tube inner wall to outer wall is led
Heat, exchanges heat between capillary outer wall and radiant panel, the composite heat-exchange of radiation plate surface and indoor environment.From the heat exchange of radiant panel
From the point of view of journey, when water supply flow is design load with supply water temperature, the factor of radiant panel surface temperature can be big according to heat transfer process
Cause is divided into two parts：Radiant panel self structure parameter and thermal environment side parameter.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of determine between radiant panel surface temperature and each factor of influence
The method of relation.
The method that the present invention is to determine relation between radiant panel surface temperature and each factor of influence, is comprised the following steps that：
1) radiant panel surface temperature and the relation of factor of influence when water supply flow and supply water temperature are design load are determined,
Under radiation cooling air-conditioning system practical stability service condition, it is determined that the factor of influence radiant panel surface temperature change
And the excursion of each factor；The factor of influence that the method being combined herein by simulation calculation and SAS softwares is determined has interior
Environment temperature, exterior window internal surface temperature, non-cooling average surface temperature (not including exterior window), heat source strength, intensity of solar radiation；
2) sample data is obtained using the simulation of ANSYS softwares
According to step 1) factor of influence radiant panel surface temperature changing rule and the excursion of each factor are determined, utilize
Orthogonal experiment method determines simulation operating mode, and the mean temperature for obtaining and plate surface being radiated under different operating modes is simulated with ANSYS softwares；
3) be based on step 2) sample data, using SAS softwares carry out regression analysis acquisition, when supply water temperature and water supply
Capillary network radiant panel average surface temperature and table in indoor temperature, non-cooling surface temperature and exterior window when flow is design load
Relation such as formula between the temperature of face：
tp=0.18750 × ta+0.22750×ts,average+0.04812×twin+9.4230
tp:Radiant panel surface temperature, unit DEG C
ta:Indoor environment temperature, unit DEG C
taverage:Non- cooling average surface temperature, unit DEG C
twin:Exterior window internal surface temperature, unit DEG C.
Relation between present invention further investigation radiant panel surface temperature and factor of influence, is determined according to orthogonal experiment rule
The simulation operating mode of system stable operation, calculates different indoor temperatures, non-cooling average surface temperature, exterior window inner surface temperature
Radiant panel average surface temperature under degree, intensity of solar radiation and indoor occupant quantity term.And use SAS pairs of statistical analysis program
Orthogonal experiment results are analyzed.
Compared with prior art, the present invention has the beneficial effect that：
1) when humidity load increases suddenly, the difference of radiant panel surface temperature and patch floating layer dew-point temperature is less than setting safety temperature
, easily there is dew condensation phenomenon, the present invention is by studying the relation between radiant panel table temperature and factor of influence, so as to effectively prevent in difference
Condensation.
2) present invention can determine that the relation between radiation plate surface and factor of influence, can give full play to the cooling energy of system
Power, reduces energy dissipation.
3) relation between present invention further investigation radiant panel surface temperature and factor of influence, according to《Radiation cooling heats
Technical regulation》, the factor of influence of determination in studying herein has indoor environment temperature, exterior window internal surface temperature, non-cooling surface
Mean temperature (not including exterior window), heat source strength, intensity of solar radiation.The span of each factor of influence is as shown in table 1.
Brief description of the drawings
Fig. 1 is radiation cooling system schematic；
Fig. 2 is radiant panel surface temperature variation diagram when water supply flow and supply water temperature are design load.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
The present invention radiation cooling system schematic diagram as shown in figure 1, including radiant panel, Fresh air handling units, plate type heat exchanger,
Water collector, water knockout drum, low-temperature receiver, small pump, one cycle pump and secondary cycle pump.
The present invention will be further described below：
1) influence factor of radiant panel surface temperature change is determined
Because different thermal environment parameters are depended primarily on influences the significant factor to radiant panel surface temperature, it is thus determined that working as
Radiant panel surface temperature when water supply flow is design load with supply water temperature.From the heat exchange angle analysis of radiant panel, radiant panel is influenceed
The factor of surface temperature can substantially be divided into two parts：Capillary network radiant panel side and indoor and outdoor surroundingses side.
(1) the capillary network radiant panel side parameter of influence radiant panel surface temperature change has：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 relevant all with the installation of radiant panel, therefore, and its influence to radiant panel surface temperature can be considered constant.
(2) the thermal environment side parameter of influence radiant panel surface temperature has：Intensity of solar radiation, indoor air temperature ta, it is non-
Cooling building enclosure internal surface temperature (especially exterior window internal surface temperature), indoor airflow S, outdoor environment temperature tout.Sun spoke
Penetrate and be although not belonging to thermal environment parameter with outdoor environment temperature, but the two factors have very important influence on thermal environment, because
The two parameters are attributed to thermal environment by this to be influenceed on radiant panel surface temperature.Radiant panel surface temperature must be influenceed through recurrence is simplified
The indoor lateral parameter of change has：Indoor environment temperature ta, exterior window internal surface temperature twin, non-cooling inner surface mean temperature
taverage, wet source strength S and sun shading angle IsolarDeng.
The factor of influence and excursion of radiant panel surface temperature changing rule can be drawn in summary, be shown in Table 1.
Each factor of influence span of table 1
2) sample data is obtained using the simulation of ANSYS softwares
The analysis more than is it can be seen that the factor of influence indoor thermal environment is numerous, and is influenced each other between each factor.According to
Orthogonal experiment rule determines the simulation operating mode of system stable operation, calculates different indoor temperatures, the average temperature in non-cooling surface
Radiant panel average surface temperature, orthogonal experiment under degree, exterior window internal surface temperature, intensity of solar radiation and indoor occupant quantity term
It the results are shown in Table 2.
ANSYS softwares are modular dynamic simulation programs, when analyzing system simulation, as long as realizing these by calling
The module of specific function, gives suitable boundary condition and primary condition, it is possible to which the dynamic change to system carries out simulation point
Analysis.Different experiment conditions can just be realized only by boundary condition is changed.
3) SAS softwares are based on, are obtained with multiple regression analysis method when water supply flow and supply water temperature are design load
Relation between radiant panel surface temperature and factor of influence.
Regression process of the radiant panel surface temperature on independent variable is given for table 3, to regression equation in regression analysis
Overall conspicuousness is tested, and carries out parameter Estimation and significance test to the coefficient of regression equation.On radiation plate surface
The P values of temperature regression equation entirety significance test are 0.0002, and regression equation is integrally notable.The goodness of fit of equation judges system
Number R2=0.8889, goodness of fit adjusted coefficient of determination Adj R-Sq=0.8334, fitting degree is higher.Radiant panel surface temperature
Five independents variable a, b, c, d, e correspond to indoor temperature t respectively in regression equationa, non-cooling average surface temperature ts,average, it is outer
Window internal surface temperature twin, intensity of solar radiation I and personnel amount N, Intercept be that intercept is constant term.Parameter
Estimate is the coefficient before each independent variable, and P values are examined by the t for observing coefficient before each independent variable, differentiates returning for each independent variable
Return coefficient whether notable.As can be seen from Table 3 under the level of signifiance 0.05, variable a, b, c P values are much smaller than 0.05, and certainly
The P values of variable d and e regression coefficient are far longer than 0.05, therefore the influence of variable d, e to radiant panel surface temperature is not notable.
Remove as seen through the above analysis after not remarkable affecting genes, the degree of fitting of regression equation is higher, each time
Return index impacts notable.Therefore it can obtain in a stable operation state, be design according to Fig. 2 supply water temperatures and water supply flow
During value between capillary network radiant panel average surface temperature and indoor temperature, non-cooling surface temperature and exterior window internal surface temperature
Relation such as formula
tp=0.18750 × ta+0.22750×ts,average+0.04812×twin+9.4230
tp:Radiant panel surface temperature, unit DEG C
ta:Indoor environment temperature, unit DEG C
taverage:Non- cooling average surface temperature, unit DEG C
twin:Exterior window internal surface temperature, unit DEG C.
Claims (1)
1. a kind of method for determining relation between radiant panel surface temperature and each factor of influence, it is characterized in that, as steps described below
Carry out：
1) radiant panel surface temperature and the relation of factor of influence when water supply flow and supply water temperature are design load are determined,
Under radiation cooling air-conditioning system practical stability service condition, it is determined that the factor of influence radiant panel surface temperature change and each
The excursion of the factor；The factor of influence that the method that is combined by simulation calculation and SAS softwares is determined have indoor environment temperature,
Exterior window internal surface temperature, non-cooling average surface temperature (not including exterior window), heat source strength, intensity of solar radiation；
2) sample data is obtained using the simulation of ANSYS softwares
According to step 1) factor of influence radiant panel surface temperature changing rule and the excursion of each factor are determined, using orthogonal
Experimental method determines simulation operating mode, and the mean temperature for obtaining and plate surface being radiated under different operating modes is simulated with ANSYS softwares；
3) be based on step 2) sample data, carry out regression analysis acquisition using SAS softwares, according to Fig. 2 when supply water temperature and
Capillary network radiant panel average surface temperature and indoor temperature, non-cooling surface temperature and exterior window when water supply flow is design load
Relation such as formula between internal surface temperature：
tp=0.18750 × ta+0.22750×ts,average+0.04812×twin+9.4230
tp:Radiant panel surface temperature, unit DEG C
ta:Indoor environment temperature, unit DEG C
taverage:Non- cooling average surface temperature, unit DEG C
twin:Exterior window internal surface temperature, unit DEG C.
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| CN201710615509.0A CN107255331A (en) | 2017-07-26 | 2017-07-26 | The method for determining relation between radiant panel surface temperature and each factor of influence |
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| CN201710615509.0A CN107255331A (en) | 2017-07-26 | 2017-07-26 | The method for determining relation between radiant panel surface temperature and each factor of influence |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183345A (en) * | 2022-06-16 | 2022-10-14 | 美的集团(上海)有限公司 | Control method, device, equipment and computer readable storage medium |
| CN117404796A (en) * | 2023-11-24 | 2024-01-16 | 珠海横琴超元科技有限公司 | Temperature control system for regulating indoor heat radiation balance |
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| 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 |
| CN106500220A (en) * | 2016-11-28 | 2017-03-15 | 天津商业大学 | Determine the method that radiation cooling system radiant panel surface temperature changes when closing that supplies water |
| CN106765880A (en) * | 2016-11-28 | 2017-05-31 | 天津商业大学 | It is determined that the method that radiation cooling system radiant panel surface temperature changes when opening that supplies water |
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| CN106765880A (en) * | 2016-11-28 | 2017-05-31 | 天津商业大学 | It is determined that the method that radiation cooling system radiant panel surface temperature changes when opening that supplies water |
| CN106765744A (en) * | 2016-11-28 | 2017-05-31 | 天津商业大学 | It is determined that the method that radiation cooling system radiant panel surface temperature changes when lowering the temperature that supplies water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183345A (en) * | 2022-06-16 | 2022-10-14 | 美的集团(上海)有限公司 | Control method, device, equipment and computer readable storage medium |
| CN115183345B (en) * | 2022-06-16 | 2024-03-29 | 美的集团(上海)有限公司 | Control method, device, equipment and computer readable storage medium |
| CN117404796A (en) * | 2023-11-24 | 2024-01-16 | 珠海横琴超元科技有限公司 | Temperature control system for regulating indoor heat radiation balance |
| CN117404796B (en) * | 2023-11-24 | 2024-05-14 | 珠海横琴超元科技有限公司 | Temperature control system for regulating indoor heat radiation balance |
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| CB03 | Change of inventor or designer information |
Inventor after: Jin Wufeng Inventor after: Zhi Changming Inventor after: Yu Bin Inventor after: Liu Shuo Inventor after: Yuan Xiaoyong Inventor after: Bi Chen Inventor before: Jin Wufeng Inventor before: Zhi Changming Inventor before: Ren Yuan Inventor before: Yu Bin Inventor before: Liu Shuo Inventor before: Yuan Xiaoyong Inventor before: Bi Chen |
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Application publication date: 20171017 |
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