CN109682037A - Adjust the method that water supply flow determines the radiation air-conditioner anti-condensation best safety temperature difference - Google Patents
Adjust the method that water supply flow determines the radiation air-conditioner anti-condensation best safety temperature difference Download PDFInfo
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- CN109682037A CN109682037A CN201811632939.4A CN201811632939A CN109682037A CN 109682037 A CN109682037 A CN 109682037A CN 201811632939 A CN201811632939 A CN 201811632939A CN 109682037 A CN109682037 A CN 109682037A
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- water supply
- supply flow
- temperature
- radiation
- air
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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
- 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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- 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
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Abstract
The invention discloses a kind of methods that adjusting water supply flow determines the radiation air-conditioner anti-condensation best safety temperature difference.The present invention has coupled the variation of radiation cooling system surfaces temperature and the variation of the attached layer air dew point temperature of note.It ensure that and give full play to radiant panel cooling ability under the premise of not condensing；A kind of best safety temperature difference prediction model of radiation air-conditioner water supply flow regulating system is provided, the equation of best safety temperature difference prediction model is as follows:
Description
Technical field
It is that a kind of adjusting water supply flow determines radiation air-conditioner anti-condensation best safety temperature the present invention relates to radiation cooling field
The method of difference.
Background technique
Radiation cooling refers to the temperature for reducing one or more inner surfaces in building enclosure, cold emission face is formed, by it
The technology to cool down with the radiation heat transfer of human body, furniture and other building enclosure surfaces.There are many radiation cooling air-conditioning systems
The incomparable advantage of traditional air-conditioning system, especially in terms of energy conservation and thermal comfort, compared with traditional air conditioning form, radiation
Low-grade cold source is utilized for cold air conditioning system, possesses more good energy saving, is improving indoor air quality, is established comfortable
Also have great advantage in terms of indoor environment.Under the background of current China's strategy of sustainable development, radiation cooling air-conditioning system at
For one of low energy building and the preferred air conditioning system of green building, application prospect is had a vast market.
Although radiation cooling air-conditioning system is developed so far existing more than 40 years history, and radiation cooling air-conditioning system and biography
System air-conditioning system, which is compared, many advantages, but until radiation cooling today air-conditioning system is still only centainly to be answered in some areas
With not promoted in the whole world, main cause is exactly that the condensation trouble of radiation cooling air-conditioning system does not obtain effectively yet
It is reasonable to solve.Moisture condensation is currently to hinder the widely applied main problem of radiation cooling air-conditioning system.Radiation cooling air-conditioning system
Radiant panel plate face is cold surface, when the air dew point temperature near radiant panel approaches even higher than radiant panel plate surface temperature,
Water recovery in air is simultaneously attached to radiation plate surface.Moisture condensation not only influences air-conditioning and normally exchanges heat work, is also easy to
Moisture condensation position nearby breeds bacterium, and water droplet is also possible that when serious to influence the normal work of indoor occupant.Radiation cooling
The characteristic that air-conditioning system easily condenses makes radiation cooling air-conditioning system plate surface temperature higher, limits whole system in this way
Cooling ability.In the larger equal area easily to condense of air humidity, since the limitation of the processing capacities such as Fresh air handling units is so that nothing
Method application radiation cooling air-conditioning system.When having moisture condensation risk indoors, by the supply water temperature for improving radiation cooling air conditioner cold water
Radiant panel surface temperature can be improved, reduce moisture condensation risk.In addition to improving supply water temperature, reducing water supply flow equally be can achieve
Improve the purpose of radiant panel surface temperature.When having moisture condensation risk indoors, in the mould fixed air-supply operating condition and keep water temperature constant
The best safety temperature difference under formula, when research is controlled by reducing different water supply flows as anti-condensation.
Summary of the invention
Technical problem solved by the invention is to overcome the deficiencies of the prior art and provide a kind of adjusting water supply flow determination
The method of the radiation air-conditioner anti-condensation best safety temperature difference.The technical solution adopted to achieve the purpose of the present invention is:
A method of adjust water supply flow determine the radiation air-conditioner anti-condensation best safety temperature difference, as steps described below into
Row:
(1) it draws when indoor occupant increases by 5 people, reduces water supply flow 0.36m3Plate surface temperature variation curve when/h
With dew-point temperature change curve,
(2) determining reduces the anti-condensation best safety temperature difference prediction model that radiation air-conditioner water supply flow is adjusted；
Radiation cooling system surfaces temperature change formula are as follows:
Radiation cooling system associated layer air dew point temperature changes formula are as follows:
Close radiant panel surface temperature Relationship Between Dynamic Change formula after supplying water are as follows:
tp=-6.30523e-0.0723τ+0.49561ta+0.24000taverage+0.04104twin+7.04179
In formula
τ --- time, [0,40] min；
ta--- indoor environment temperature, 25-28 DEG C；
taverage--- non-cooling supply average surface temperature, 26.3-29.3 DEG C；
twin--- exterior window internal surface temperature, 26-38 DEG C；
Associated layer air dew point temperature dynamic change function are as follows:
Y=(0.79841d-0.67 Δ N-2.80830) × exp (- τ/(11.47639d-5.5833 Δ N+17.19547))
-0.92402d+0.40667ΔN+20.41481
In formula
τ --- time, [0,110] min；
D --- wet source is away from associated layer distance, m；
Δ N --- indoor occupant is accelerated, people；
Above-mentioned two formula is coupled, can obtain reducing the anti-condensation best safety temperature difference prediction mould that radiation air-conditioner water supply flow is adjusted
Type:
Wherein t1=-13.831；
A1=-6.30523；
y1=0.49561ta+0.24000taverage+0.04104twin+7.04179；
t2=11.47639d-5.5833 Δ N+17.19547；
A2=0.79841d-0.67 Δ N-2.80830；
y2=-0.92402d+0.40667 Δ N+20.41481；
T: best to adjust moment corresponding radiation cooling system associated layer air dew point temperature；
Δ t=t0-t
In formula:
t0: the radiant panel surface temperature under steady working condition is given value；
T: best to adjust moment corresponding radiation cooling system associated layer pocket dew-point temperature；
Δ t: the radiation cooling system surfaces anti-condensation best safety temperature difference.
Compared with traditional technology, benefit effect of the invention is as follows:
1) present invention has coupled the variation of radiation cooling system surfaces temperature and the variation of the attached layer air dew point temperature of note.It protects
It has demonstrate,proved and has given full play to radiant panel cooling ability under the premise of not condensing；
2) the anti-condensation method that the present invention is adjusted using radiation air-conditioner water supply flow is reduced obtains closing water supply anti-condensation tune
The best safety temperature difference of section.
Detailed description of the invention
Fig. 1 is to close to supply water after increasing by 5 people to adjust working temperature change curve.
Specific embodiment
Here is that the present invention will be further described.
1) as shown in Figure 1, drawing when indoor occupant increases by 5 people, water supply flow 0.36m is reduced3Plate surface temperature when/h
Change curve and dew-point temperature change curve are spent, but same, reducing water supply flow simultaneously when personnel increase can not make to make
Cooling capacity maximizes；As seen from Figure 1, reduce water supply flow the best adjusting moment should personnel increase after a period of time, by
It is larger in initial plate temperature and initial associated layer air dew point temperature difference, therefore when associated layer air dew point temperature is increased close to
Radiant panel surface temperature is advanced the speed much larger than associated layer air dew point at this time after reducing water supply flow when radiant panel surface temperature
Temperature increase rate, therefore this kind of regulative mode guarantees that the safe temperature difference is 0.5 DEG C and can prevent Condensation under this operating condition
Under the premise of refrigerating capacity maximize.
2) determining reduces the anti-condensation best safety temperature difference prediction model that radiation air-conditioner water supply flow is adjusted；
Radiation cooling system surfaces temperature change formula are as follows:
Radiation cooling system associated layer air dew point temperature changes formula are as follows:
Close radiant panel surface temperature Relationship Between Dynamic Change formula after supplying water are as follows:
tp=-6.30523e-0.0723τ+0.49561ta+0.24000taverage+0.04104twin+7.04179
In formula
τ --- time, [0,40] min；
ta--- indoor environment temperature, 25-28 DEG C；
taverage--- non-cooling supply average surface temperature, 26.3-29.3 DEG C；
twin--- exterior window internal surface temperature, 26-38 DEG C；
Associated layer air dew point temperature dynamic change function are as follows:
Y=(0.79841d-0.67 Δ N-2.80830) × exp (- τ/(11.47639d-5.5833 Δ N+17.19547))
-0.92402d+0.40667ΔN+20.41481
In formula
τ --- time, [0,110] min；
D --- wet source is away from associated layer distance, m；
Δ N --- indoor occupant is accelerated, people；
Above-mentioned two formula is coupled, can obtain reducing the anti-condensation best safety temperature difference prediction mould that radiation air-conditioner water supply flow is adjusted
Type:
Wherein t1=-13.831；
A1=-6.30523；
y1=0.49561ta+0.24000taverage+0.04104twin+7.04179；
t2=11.47639d-5.5833 Δ N+17.19547；
A2=0.79841d-0.67 Δ N-2.80830；
y2=-0.92402d+0.40667 Δ N+20.41481；
T: best to adjust moment corresponding radiation cooling system associated layer air dew point temperature；
Δ t=t0-t
In formula:
t0: the radiant panel surface temperature under steady working condition is given value；
T: best to adjust moment corresponding radiation cooling system associated layer pocket dew-point temperature；
Δ t: the radiation cooling system surfaces anti-condensation best safety temperature difference.
Claims (1)
1. a kind of method for adjusting water supply flow and determining the radiation air-conditioner anti-condensation best safety temperature difference, carries out as steps described below:
(1) it draws when indoor occupant increases by 5 people, reduces water supply flow 0.36m3Plate surface temperature variation curve and dew when/h
Point temperature variation curve,
(2) determining reduces the anti-condensation best safety temperature difference prediction model that radiation air-conditioner water supply flow is adjusted；
Radiation cooling system surfaces temperature change formula are as follows:
Radiation cooling system associated layer air dew point temperature changes formula are as follows:
Close radiant panel surface temperature Relationship Between Dynamic Change formula after supplying water are as follows:
tp=-6.30523e-0.0723τ+0.49561ta+0.24000taverage+0.04104twin+7.04179
In formula
τ --- time, [0,40] min；
ta--- indoor environment temperature, 25-28 DEG C；
taverage--- non-cooling supply average surface temperature, 26.3-29.3 DEG C；
twin--- exterior window internal surface temperature, 26-38 DEG C；
Associated layer air dew point temperature dynamic change function are as follows:
Y=(0.79841d-0.67 Δ N-2.80830) × exp (- τ/(11.47639d-5.5833 Δ N+17.19547))-
0.92402d+0.40667ΔN+20.41481
In formula
τ --- time, [0,110] min；
D --- wet source is away from associated layer distance, m；
Δ N --- indoor occupant is accelerated, people；
Above-mentioned two formula is coupled, can obtain reducing the anti-condensation best safety temperature difference prediction model that radiation air-conditioner water supply flow is adjusted:
Wherein t1=-13.831；
A1=-6.30523；
y1=0.49561ta+0.24000taverage+0.04104twin+7.04179；
t2=11.47639d-5.5833 Δ N+17.19547；
A2=0.79841d-0.67 Δ N-2.80830；
y2=-0.92402d+0.40667 Δ N+20.41481；
T: best to adjust moment corresponding radiation cooling system associated layer air dew point temperature；
Δ t=t0-t
In formula:
t0: the radiant panel surface temperature under steady working condition is given value；
T: best to adjust moment corresponding radiation cooling system associated layer pocket dew-point temperature；
Δ t: the radiation cooling system surfaces anti-condensation best safety temperature difference.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811632939.4A CN109682037A (en) | 2018-12-29 | 2018-12-29 | Adjust the method that water supply flow determines the radiation air-conditioner anti-condensation best safety temperature difference |
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| CN201811632939.4A CN109682037A (en) | 2018-12-29 | 2018-12-29 | Adjust the method that water supply flow determines the radiation air-conditioner anti-condensation best safety temperature difference |
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| CN109682037A true CN109682037A (en) | 2019-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116085891A (en) * | 2023-04-10 | 2023-05-09 | 臣功环境科技有限公司 | High-large factory building air conditioning solar integrated system and air conditioning method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831244A (en) * | 1981-08-17 | 1983-02-23 | Daikin Ind Ltd | Controller for temperature of air conditioner |
| EP0740114A2 (en) * | 1995-04-28 | 1996-10-30 | Sanyo Electric Co., Ltd. | Radiation type air conditioning system having dew-condensation preventing mechanism |
| CN102230652A (en) * | 2011-06-10 | 2011-11-02 | 东南大学 | Heat and humidity segmented treatment air-conditioning device and method combined with radiation cold supply |
| WO2014017751A1 (en) * | 2012-07-27 | 2014-01-30 | 주식회사 경동나비엔 | Method for controlling condensation prevention in separate rooms |
| 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 |
| CN106765745A (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 heating up that supplies water |
-
2018
- 2018-12-29 CN CN201811632939.4A patent/CN109682037A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831244A (en) * | 1981-08-17 | 1983-02-23 | Daikin Ind Ltd | Controller for temperature of air conditioner |
| EP0740114A2 (en) * | 1995-04-28 | 1996-10-30 | Sanyo Electric Co., Ltd. | Radiation type air conditioning system having dew-condensation preventing mechanism |
| CN102230652A (en) * | 2011-06-10 | 2011-11-02 | 东南大学 | Heat and humidity segmented treatment air-conditioning device and method combined with radiation cold supply |
| WO2014017751A1 (en) * | 2012-07-27 | 2014-01-30 | 주식회사 경동나비엔 | Method for controlling condensation prevention in separate rooms |
| 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 |
| CN106765745A (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 heating up that supplies water |
Non-Patent Citations (1)
| Title |
|---|
| 高攀: "第五章贴附层空气露点温度动态变化的模拟研究、第六章基于板温变化和露点温度变化的防结露研究", 《中国优秀硕士论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116085891A (en) * | 2023-04-10 | 2023-05-09 | 臣功环境科技有限公司 | High-large factory building air conditioning solar integrated system and air conditioning method thereof |
| CN116085891B (en) * | 2023-04-10 | 2023-06-16 | 臣功环境科技有限公司 | High-large factory building air conditioning solar integrated system and air conditioning method thereof |
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Application publication date: 20190426 |