CN106765869A - A kind of cold emission air-conditioning system temperature control method and device - Google Patents
A kind of cold emission air-conditioning system temperature control method and device Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The present invention relates to cold emission air-conditioning system temperature control method and device, the method is comprised the following steps：The ceiling face temperature of cold emission air-conditioning system and the radiation heat transfer relation of indoor human body surface area are obtained, while obtaining the heat convection relation of indoor air temperature and indoor human body surface area；According to different type air-conditioning system heat exchange equivalence principle, radiation heat transfer relation and heat convection relation equilibrium establishment equation；Carry out calculating the relational expression for obtaining indoor air temperature and the ceiling face temperature of cold emission air-conditioning system based on equation；According to default indoor air temperature, Equivalent Conversion is carried out using the relational expression of indoor air temperature and the ceiling face temperature of cold emission air-conditioning system, obtain the setting value of corresponding ceiling face temperature, adjust the ceiling face temperature of cold emission air-conditioning system.The present invention solves cold emission air-conditioning climate control issues in actual motion and operating process, and the good experience of user is ensured while energy-conservation.
Description
Technical Field
The invention relates to the technical field of large-scale central air conditioners in buildings, in particular to a temperature control method and device for a cold radiation air conditioning system.
Background
In the field of central air conditioning, the thermal comfort of the end user is often one of the important indicators used to assess whether a central air conditioning system function is being effectively implemented. The term "thermal comfort" refers to the subjective and objective evaluation of a human body to satisfy the hot and humid environment. Thermal comfort is whether a human body feels comfortable or not through the combination of the thermal balance and the sensed environmental conditions, which is determined by the combination of physiology and psychology, and is more emphasized on the psychology, and the environmental parameters influencing the thermal comfort of the human body mainly comprise air temperature, air flow speed, relative humidity of air and average radiation temperature; the human parameters include thermal resistance of the clothes and labor intensity. The human body thermal comfort researches the subjects of building thermophysics, physiology of human body thermal regulation mechanism, human psychology and the like. More than 80% of the life of a person spends indoors, and the quality of indoor environment such as sound, light and heat environment and the quality of indoor air directly affect the physical and psychological health, comfort and working efficiency of the person. Meanwhile, a large number of domestic and foreign researches show that the indoor air quality is also effective with the thermal environment, 1) the air temperature, humidity and wind speed can influence the release of indoor pollutants; 2) the sensation of pollutants is temperature dependent, and foreign research suggests that a decrease in temperature may be more comfortable and less unsatisfactory for air quality, while the chemical composition of the indoor air remains unchanged. To achieve a comfortable thermal environment, countries consume large amounts of energy for heating and air conditioning each year. The traditional air conditioning system usually adopts an air convection heat exchange mode to remove or add indoor heat, which often causes excessive overheating or excessive cooling of buildings, thus not only causing discomfort to human bodies, but also wasting a large amount of energy. Therefore, the cold radiation air conditioning system is adopted to regulate and control the indoor hot environment, the waste can be avoided while the human body comfort is met, but the temperature setting method of the control panel of the indoor hot environment of the cold radiation air conditioning system has certain problems, and the temperature set by the control panel is the surface temperature of the cold radiation ceiling rather than the indoor air temperature, so that misunderstanding and mistaken setting are easily caused for common users, and the condition that the actual use effect of the cold radiation air conditioner is not good is caused.
Disclosure of Invention
The invention aims to solve the technical problem that the temperature set by the control panel of the cold radiation air conditioning system in the prior art is the surface temperature of the cold radiation ceiling rather than the indoor air temperature, so that misunderstanding and misunderstanding are easily caused to common users, and the actual use effect of the cold radiation air conditioner is not good.
The technical scheme adopted by the invention for solving the technical problems is as follows: a cold radiation air conditioning system temperature control method is constructed, and comprises the following steps:
s1, acquiring the radiation heat exchange relationship between the ceiling surface temperature of the cold radiation air conditioning system and the surface area of an indoor human body, and acquiring the convection heat exchange relationship between the indoor air temperature and the surface area of the indoor human body;
s2, establishing a balance equation according to the heat exchange equivalent principle of different types of air conditioning systems, the radiation heat exchange relation and the convection heat exchange relation;
s3, calculating based on the balance equation to obtain a relational expression between the indoor air temperature and the surface temperature of the ceiling of the cold radiation air conditioning system;
and S4, performing equivalent conversion according to a preset indoor air temperature by using a relational expression between the indoor air temperature and the ceiling surface temperature of the cold radiation air-conditioning system to obtain a corresponding set value of the ceiling surface temperature, and further adjusting the ceiling surface temperature of the cold radiation air-conditioning system.
In the method for controlling a temperature of a cold radiation air conditioning system according to the present invention, it is preferable that the step S1 includes:
and calculating according to a calculation formula of the radiation heat exchange quantity to obtain the radiation heat exchange relation between the surface temperature of the ceiling of the cold radiation air conditioner and the surface area of the indoor human body.
In the method for controlling the temperature of the cold radiation air conditioning system, preferably, the calculation formula of the radiation heat exchange amount is as follows:
wherein,
qrad: representing the radiant heat exchange quantity;
: representing the blackness of the surface of the ceiling material;
C0: representing the radiance factor of the community;
s: representing the surface area of a human body;
ts: indicating the surface temperature of the ceiling of the cold radiation air conditioning system.
In the method for controlling a temperature of a cold radiation air conditioning system according to the present invention, it is preferable that the step S1 further includes:
and calculating according to a heat convection formula of the traditional air heat convection air-conditioning system to obtain the heat convection relation between the indoor air temperature and the surface area of the human body.
In the method for controlling the temperature of the cold radiation air conditioning system, preferably, the formula of the convective heat transfer is as follows:
Qcon＝hA×S×(37-TA)
wherein,
qcon: represents the convective heat transfer;
hA: indicating air and personSurface convection heat transfer coefficient;
TA: representing the equivalent indoor air operating temperature of the convective heat transfer air conditioning system.
In the method for controlling a temperature of a cold radiation air conditioning system according to the present invention, preferably, in step S2, the air conditioning system heat exchange equivalence principle is that a radiation heat of the cold radiation air conditioning system is equal to a convection heat exchange amount of the conventional air conditioning system.
In the method for controlling a temperature of a cold radiation air conditioning system according to the present invention, preferably, in step S2, the balance equation is:
Qrad＝Qcon
in the method for controlling a temperature of a cold radiation air conditioning system of the present invention, preferably, in the step S2,
and substituting the radiation heat exchange relation and the convection heat exchange relation of the ceiling surface temperature and the surface area of the indoor human body of the cold radiation air-conditioning system and the convection heat exchange relation of the indoor air temperature and the surface area of the indoor human body into the balance equation according to the heat exchange equivalent principle of the different types of air-conditioning systems.
In the method for controlling a temperature of a radiant cooling air conditioning system according to the present invention, it is preferable that in step S3, a relation between the indoor air temperature and a ceiling surface temperature of the radiant cooling air conditioning system is:
the present invention also provides a temperature control device for a cold radiation air conditioning system, comprising:
the cold radiation air conditioning system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the radiation heat exchange relationship between the ceiling surface temperature of the cold radiation air conditioning system and the surface area of an indoor human body and also acquiring the convection heat exchange relationship between the indoor air temperature and the surface area of the indoor human body;
the processing unit is used for establishing a balance equation according to the heat exchange equivalent principle of different types of air conditioning systems, the radiation heat exchange relation and the convection heat exchange relation;
a calculation unit for calculating based on the balance equation to obtain a relational expression between the indoor air temperature and a ceiling surface temperature of the cold radiation air conditioning system;
and the control unit is used for performing equivalent conversion according to a preset indoor air temperature by using a relational expression between the indoor air temperature and the ceiling surface temperature of the cold radiation air-conditioning system to obtain a corresponding set value of the ceiling surface temperature, and further adjusting the ceiling surface temperature of the cold radiation air-conditioning system.
The implementation of the temperature control method of the cold radiation air conditioning system has the following beneficial effects: the method comprises the following steps: acquiring a radiation heat exchange relationship between the surface temperature of a ceiling of a cold radiation air conditioning system and the surface area of an indoor human body, and acquiring a convection heat exchange relationship between the indoor air temperature and the surface area of the indoor human body; establishing a balance equation according to the heat exchange equivalent principle, the radiation heat exchange relation and the convection heat exchange relation of different types of air conditioning systems; calculating based on a balance equation to obtain a relational expression between the indoor air temperature and the ceiling surface temperature of the cold radiation air conditioning system; and performing equivalent conversion by using a relational expression between the indoor air temperature and the ceiling surface temperature of the cold radiation air-conditioning system according to the preset indoor air temperature to obtain a corresponding set value of the ceiling surface temperature, and adjusting the ceiling surface temperature of the cold radiation air-conditioning system. The invention realizes that the set value of the surface temperature of the ceiling of the cold radiation air-conditioning system is equivalent to the set value of the indoor air temperature of the traditional air convection air-conditioning by adopting the row-to-row temperature calculation method, thereby being convenient for common users to identify and set the operating temperature of the air-conditioning; the problem of cold radiation air conditioning system temperature control in actual operation and operation process is solved, energy-conservation is realized, and good use experience of users is guaranteed.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flow diagram of a method for controlling the temperature of a cold radiation air conditioning system according to the present invention;
fig. 2 is a schematic structural diagram of a temperature control device of a cold radiation air conditioning system according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a method for controlling a temperature of a radiant cooling air conditioning system according to an embodiment of the present invention is used for setting a temperature of a ceiling surface of the radiant cooling air conditioning system, and includes the steps of:
s1, acquiring the radiation heat exchange relation between the ceiling surface temperature Ts and the indoor human body surface area S of the cold radiation air-conditioning system, and acquiring the indoor air temperature TAAnd the convection heat exchange relation with the surface area S of the indoor human body.
In step S1, the ceiling surface temperature T of the cold radiation air conditioning systemSAnd calculating the radiation heat exchange relation with the indoor human body surface area S according to a calculation formula of the radiation heat exchange quantity. It is understood that radiation is a phenomenon in which electromagnetic waves transmit energy. Thermal radiation is electromagnetic radiation generated by thermal motion and is a form of heat transfer that transfers heat in the form of electromagnetic waves. The electromagnetic wave of the heat radiation is excited when the thermal motion state of the microscopic particles in the object is changed, and the remarkable characteristic is that the heat radiation can be transmitted in vacuum and has strong directionality. As long as the temperature of the object is higher than 0 Kelvin, the heat energy is continuously changed into the heat energyRadiant energy, emitting thermal radiation to the surrounding space; at the same time, the object also continuously radiates heat when the surrounding object projects on the object, and the absorbed radiation energy is converted into heat energy again. Therefore, the heat transfer process in the heat radiation process is accompanied by conversion of the energy form. Radiative heat transfer is the total effect of mutual radiation and absorption between objects. Therefore, in the embodiment of the present invention, the ceiling surface temperature T of the cold radiation air conditioning systemSThe radiation heat exchange relation with the indoor human body surface area S can be obtained through calculation of the radiation heat exchange quantity. Specifically, the calculation formula of the radiant heat exchange amount is as follows:
wherein,
qrad: representing the radiant heat exchange quantity;
: representing the blackness of the surface of the ceiling material;
C0: representing the radiance factor of the community;
s: representing the surface area of a human body;
ts: indicating the surface temperature of the ceiling of the cold radiation air conditioning system.
Preferably, the blackness of the surface of the ceiling material is determined by the material selected for the ceiling, and the blackness of the surface is different from different materials. It will be appreciated that the degree of blackness of the surface of the ceiling material can be determined by looking at a selected table of blackness of the surface of the ceiling material, each ceiling material corresponding to a unique degree of blackness of the surface. In the embodiments of the present invention, the present invention does not specifically limit the ceiling material.
In some embodiments, the human body surface area S can be calculated and determined according to a general formula applicable in China. Specifically, the calculation formula of the human body surface area S is: s-0.0061 height +0.0124 weight-0.0099. It is understood that the human body surface area S is calculated according to the number of indoor persons and personal information of the indoor persons (the personal information includes the height and weight of each person) when the human body surface area S is set as required.
In some embodiments, blackbody radiation system C0It is preferably 5.67W/(m 2. multidot.K 4).
Further, step S1 includes:
calculating according to a heat convection formula of a traditional air heat convection air-conditioning system to obtain the indoor air temperature TAThe heat convection relation with the surface area S of the human body. Specifically, the convective heat transfer formula is:
Qcon＝hA×S×(37-TA)
wherein,
qcon: represents the convective heat transfer;
hA: representing the convection heat exchange coefficient of air and the surface of a human body;
TA: representing the equivalent convective heat transfer air conditioning system indoor air temperature.
It is understood that convective heat transfer refers to the transfer of heat from a fluid to a solid surface. The convective heat transfer is a heat transfer phenomenon occurring in the flowing process of a fluid, and the heat transfer is carried out by relying on the movement of fluid particles, which is closely related to the flowing condition of the fluid. When the fluid flows in a laminar flow, the heat transfer in the direction perpendicular to the flow of the fluid is mainly performed in a heat conduction manner. Further, in the embodiment of the present invention, the indoor air temperature T can be obtained by the heat convection formula of the conventional air heat convection air conditioning systemAThe heat convection relation with the surface area S of the human body.
Preferably, in some embodiments, the convective heat transfer coefficient hAThe value of (A) was 10.33W/(m 2. multidot. C.).
And S2, establishing balance according to the heat exchange equivalent principle, the radiation heat exchange relation and the convection heat exchange relation of different types of air conditioning systems, and the like.
In step S2, the heat exchange equivalence principle of the different types of air conditioning systems is that the radiant heat of the radiant air conditioning system is equal to the convection heat exchange amount of the conventional air conditioning system.
Further, according to the heat exchange equivalent principle of different types of air conditioning systems, the radiation heat exchange relationship between the cold radiation air conditioning system ceiling surface temperature Ts and the indoor human body surface area S obtained in the step S1 and the indoor air temperature TAThe heat convection relationship with the human body surface area S is substituted into the equilibrium equation. In other words, according to the principle that the radiant heat of the radiant air-conditioning system is equal to the energy of the convection heat exchange quantity of the traditional air-conditioning system, the radiant heat exchange relation between the ceiling surface temperature Ts and the indoor human body surface area S of the cold radiant air-conditioning system and the indoor air temperature TAThe heat convection relationship with the human body surface area S is substituted into the equilibrium equation. Specifically, the equilibrium equation is: qrad＝Qcon。
S3, calculating to obtain the indoor air temperature T based on the balance equationAAnd the ceiling surface temperature TS of the radiant cooling air conditioning system.
Before step S3, the radiation heat exchange relationship between the ceiling surface temperature Ts and the indoor human body surface area S of the cold radiation air conditioning system and the indoor air temperature T are firstly carried outAThe convective heat transfer relationship with the human body surface area S is substituted into the equilibrium equation as follows:
according to the calculation result, the indoor air temperature T is obtainedAThe relationship with the ceiling surface temperature Ts of the cold radiation air conditioning system, namely:
s4, utilizing the indoor air temperature T according to the preset indoor air temperatureAAnd performing equivalent conversion on the relational expression of the temperature Ts and the ceiling surface temperature Ts of the cold radiation air-conditioning system to obtain a set value of the corresponding ceiling surface temperature Ts, and further adjusting the ceiling surface temperature Ts of the cold radiation air-conditioning system.
Specifically, the indoor air temperature T is obtained by step S1, step S2, and step S3AIn relation to the ceiling surface temperature Ts of the cold radiation air conditioning system, when the user is adjusting the indoor temperature, i.e., the temperature T of the indoor airASetting a preset value, e.g. 22 deg., based on which the room air temperature T is usedAEquivalent conversion is carried out on a relational expression of the temperature Ts of the surface of the blooming plate of the cold radiation air-conditioning system to obtain the temperature T of the indoor airAAt 22 degrees, a set point for the ceiling surface temperature Ts of the radiant cooling air conditioning system.
It can be understood that the temperature control method of the cold radiation air conditioning system of the invention is suitable for the temperature setting of the central air conditioning system with the cold radiation ceiling. Compared with the existing method for setting the temperature of the ceiling surface of the cold radiation air conditioning system, the method is internally provided with an equivalent temperature calculation method. Namely, the indoor air temperature T is obtained by utilizing different types of heat exchange equivalent principlesAThe relation between the temperature of the surface of the ceiling Ts of the cold radiation air-conditioning system is equivalent according to the relation, so that the set value of the temperature of the surface of the ceiling Ts of the cold radiation air-conditioning system is equivalent to the indoor operating temperature (namely the indoor air temperature T) of the traditional air convection air-conditioning systemA) The set value of (2). The method is convenient for common users to identify and set the air conditioner running temperature, solves the problem of temperature control of the cold radiation air conditioning system in the actual running and operation processes, and ensures good experience of the users while realizing energy conservation through equivalent regulation and control of the temperature.
In other words, the room operating temperature (i.e., the room air temperature T) is controlled by obtaining the control panel of the conventional air convection air conditioning systemA) A relational expression of the temperature Ts of the control panel of the cold radiation air conditioning system to the surface of the ceiling is built inThe equivalent conversion is carried out by the control panel controller of the cold radiation air conditioning system, thereby realizing that the user adjusts the indoor air operation temperature (namely the indoor air temperature T)A) And when the temperature Ts of the ceiling surface of the cold radiation air-conditioning system is adjusted, the control panel of the cold radiation air-conditioning system correspondingly adjusts the temperature Ts of the ceiling surface of the cold radiation air-conditioning system. Namely:
understandably, when the user is setting the indoor air temperature TAAnd then, the cold radiation air-conditioning system converts the calculation formula of the ceiling surface temperature Ts in the controller to obtain a corresponding set value of the ceiling surface temperature Ts, and then adjusts the ceiling surface temperature Ts of the cold radiation air-conditioning system according to the set value of the ceiling surface temperature Ts obtained through conversion.
As shown in fig. 2, in the schematic structural diagram of the temperature control device of a cold radiation air conditioning system of the present invention, the device includes: an acquisition unit 100, a processing unit 200, a calculation unit 300, and a control unit 400. Specifically, the method comprises the following steps:
an obtaining unit 100 for obtaining a radiation heat exchange relationship between a ceiling surface temperature Ts and an indoor human body surface area S of the cold radiation air conditioning system, and simultaneously obtaining an indoor air temperature TAAnd the convection heat exchange relation with the surface area S of the indoor human body.
In the obtaining unit 100, the radiation heat exchange relationship between the ceiling surface temperature Ts of the cold radiation air conditioning system and the indoor human body surface area S is calculated according to the calculation formula of the radiation heat exchange amount. It is understood that radiation is a phenomenon in which electromagnetic waves transmit energy. Thermal radiation is electromagnetic filtered radiation generated by thermal motion and is a heat transfer means for transferring heat in the form of an electromagnetic filter. The electromagnetic filtering of thermal radiation is excited when the thermal motion state of microscopic particles in an object changes, and the electromagnetic filtering of thermal radiation is characterized in that the thermal radiation can be transmitted in vacuum and has strong directionality. As long as the temperature of the object is higher than 0 Kelvin, the heat energy is continuously converted into radiation energy, and the radiation energy emits heat radiation to the surrounding space; at the same time, the object also continuously radiates heat when the surrounding object projects on the object, and the absorbed radiation energy is converted into heat energy again. Therefore, the heat transfer process in the heat radiation process is accompanied by conversion of the energy form. Radiative heat transfer is the total effect of mutual radiation and absorption between objects. Therefore, in the embodiment of the present invention, the radiation heat exchange relationship between the ceiling surface temperature Ts and the indoor human body surface area S of the cold radiation air conditioning system can be obtained by calculating the radiation heat exchange amount. Preferably, in the embodiment of the present invention, the ceiling surface temperature Ts of the cold radiation air conditioning system is set by a control panel in the cold radiation air conditioning system in correspondence with the adjustment. Specifically, the calculation formula of the radiant heat exchange amount is as follows:
wherein,
qrad: representing the radiant heat exchange quantity;
: representing the blackness of the surface of the ceiling material;
c0: representing the radiance factor of the community;
s: representing the surface area of a human body;
ts: indicating the surface temperature of the ceiling of the cold radiation air conditioning system.
Preferably, the blackness of the surface of the ceiling material is determined by the material selected for the ceiling, and the blackness of the surface is different from different materials. It will be appreciated that the degree of blackness of the surface of the ceiling material can be determined by looking at a selected table of blackness of the surface of the ceiling material, each ceiling material corresponding to a unique degree of blackness of the surface. In the embodiments of the present invention, the present invention does not specifically limit the ceiling material.
In some embodiments, the human body surface area S can be calculated and determined according to a general formula applicable in China. Specifically, the calculation formula of the human body surface area S is: s-0.0061 height +0.0124 weight-0.0099. It is understood that the human body surface area S is calculated according to the number of indoor persons and personal information of the indoor persons (the personal information includes the height and weight of each person) when the human body surface area S is set as required.
In some embodiments, blackbody radiation system C0It is preferably 5.67W/(m 2. multidot.K 4).
Further, still include:
calculating according to a heat convection formula of a traditional air heat convection air-conditioning system to obtain the indoor air temperature TAThe heat convection relation with the surface area S of the human body. Specifically, the convective heat transfer formula is:
Qcon＝hA×S×(37-TA)
wherein,
qcon: represents the convective heat transfer;
hA: representing the convection heat exchange coefficient of air and the surface of a human body;
TA: representing the equivalent convective heat transfer air conditioning system indoor air temperature.
It is understood that convective heat transfer refers to the transfer of heat from a fluid to a solid surface. The convective heat transfer is a heat transfer phenomenon occurring in the flowing process of a fluid, and the heat transfer is carried out by relying on the movement of fluid particles, which is closely related to the flowing condition of the fluid. When the fluid flows in a laminar flow, the heat transfer in the direction perpendicular to the flow of the fluid is mainly performed in a heat conduction manner. Further, in the embodiment of the present invention, the indoor air temperature T can be obtained by the heat convection formula of the conventional air heat convection air conditioning systemAThe heat convection relation with the surface area S of the human body.
Preferably, in some embodiments, the convective heat transfer coefficient hAThe value of (A) was 10.33W/(m 2. multidot. C.).
And the processing unit 200 is configured to establish a balance equation according to the heat exchange equivalent principle, the radiation heat exchange relationship and the convection heat exchange relationship of different types of air conditioning systems.
It is understood that the heat exchange equivalence principle of different types of air conditioning systems is that the radiant heat of a radiant air conditioning system is equal to the convection heat exchange quantity of a traditional air conditioning system.
Further, according to the heat exchange equivalent principle of different types of air conditioning systems, the radiation heat exchange relationship between the cold radiation air conditioning system ceiling surface temperature Ts and the indoor human body surface area S obtained in the obtaining unit 100 and the indoor air temperature TAThe heat convection relationship with the human body surface area S is substituted into the equilibrium equation. In other words, according to the principle that the radiant heat of the radiant air-conditioning system is equal to the energy of the convection heat exchange quantity of the traditional air-conditioning system, the radiant heat exchange relation between the ceiling surface temperature Ts and the indoor human body surface area S of the cold radiant air-conditioning system and the indoor air temperature TAThe heat convection relationship with the human body surface area S is substituted into the equilibrium equation. Specifically, the equilibrium equation is: qrad＝Qcon。
A calculating unit 300 for calculating to obtain the indoor air temperature T based on the balance equationAAnd a ceiling surface temperature Ts of the cold radiation air conditioning system.
Before the calculation unit 300 starts to calculate, the radiation heat exchange relationship between the ceiling surface temperature Ts and the indoor human body surface area S of the cold radiation air conditioning system and the indoor air temperature T are firstly calculatedAThe convective heat transfer relationship with the human body surface area S is substituted into the equilibrium equation as follows:
according to the calculation result, the indoor air temperature T is obtainedAThe relationship with the ceiling surface temperature Ts of the cold radiation air conditioning system, namely:
a control unit 400 for utilizing the indoor air temperature T according to a preset indoor air temperatureAAnd performing equivalent conversion on the relational expression of the temperature Ts and the ceiling surface temperature Ts of the cold radiation air-conditioning system to obtain a set value of the corresponding ceiling surface temperature Ts, and further adjusting the ceiling surface temperature Ts of the cold radiation air-conditioning system.
Specifically, the indoor air temperature T is obtained by the obtaining unit 100, the processing unit 200, and the calculating unit 300AIn relation to the ceiling surface temperature Ts of the cold radiation air conditioning system, when the user is adjusting the indoor temperature, i.e., the temperature T of the indoor airASetting a preset value, e.g. 22 deg., based on which the room air temperature T is usedAEquivalent conversion is carried out on a relational expression of the temperature Ts of the surface of the blooming plate of the cold radiation air-conditioning system to obtain the temperature T of the indoor airAAt 22 degrees, a set point for the ceiling surface temperature Ts of the radiant cooling air conditioning system.
It can be understood that the temperature control method of the cold radiation air conditioning system of the invention is suitable for the temperature setting of the central air conditioning system with the cold radiation ceiling. Compared with the existing method for setting the temperature of the ceiling surface of the cold radiation air conditioning system, the method is internally provided with an equivalent temperature calculation method. Namely, the indoor air temperature T is obtained by utilizing different types of heat exchange equivalent principlesAThe relation between the temperature of the surface of the ceiling Ts of the cold radiation air-conditioning system is equivalent according to the relation, so that the set value of the temperature of the surface of the ceiling Ts of the cold radiation air-conditioning system is equivalent to the indoor operating temperature (namely the indoor air temperature T) of the traditional air convection air-conditioning systemA) The set value of (2). The method is convenient for common users to identify and set the air conditioner running temperature, solves the problem of temperature control of the cold radiation air conditioning system in the actual running and operation processes, and ensures good experience of the users while realizing energy conservation through equivalent regulation and control of the temperature.
In other words, the room operating temperature (i.e., the room air temperature T) is controlled by obtaining the control panel of the conventional air convection air conditioning systemA) The relation expression of the temperature Ts of the control panel of the cold radiation air-conditioning system to the surface of the ceiling is built in the control panel controller of the cold radiation air-conditioning system for equivalent conversion, thereby realizing the adjustment of the indoor air operation temperature (namely the indoor air temperature T) by a userA) And when the temperature Ts of the ceiling surface of the cold radiation air-conditioning system is adjusted, the control panel of the cold radiation air-conditioning system correspondingly adjusts the temperature Ts of the ceiling surface of the cold radiation air-conditioning system. Namely:
understandably, when the user is setting the indoor air temperature TAAnd then, the cold radiation air-conditioning system converts the calculation formula of the ceiling surface temperature Ts in the controller to obtain a corresponding set value of the ceiling surface temperature Ts, and then adjusts the ceiling surface temperature Ts of the cold radiation air-conditioning system according to the set value of the ceiling surface temperature Ts obtained through conversion.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A temperature control method of a cold radiation air conditioning system is characterized by comprising the following steps:
s1, acquiring the radiation heat exchange relationship between the ceiling surface temperature of the cold radiation air conditioning system and the surface area of an indoor human body, and acquiring the convection heat exchange relationship between the indoor air temperature and the surface area of the indoor human body;
s2, establishing a balance equation according to the heat exchange equivalent principle of different types of air conditioning systems, the radiation heat exchange relation and the convection heat exchange relation;
s3, calculating based on the balance equation to obtain a relational expression between the indoor air temperature and the surface temperature of the ceiling of the cold radiation air conditioning system;
and S4, performing equivalent conversion according to a preset indoor air temperature by using a relational expression between the indoor air temperature and the ceiling surface temperature of the cold radiation air-conditioning system to obtain a corresponding set value of the ceiling surface temperature, and further adjusting the ceiling surface temperature of the cold radiation air-conditioning system.
2. The cold radiation air conditioning system temperature control method as claimed in claim 1, wherein said step S1 includes:
and calculating according to a calculation formula of the radiation heat exchange quantity to obtain the radiation heat exchange relation between the surface temperature of the ceiling of the cold radiation air-conditioning system and the surface area of the indoor human body.
3. The method as claimed in claim 2, wherein the radiant heat exchange amount is calculated by the formula:
wherein,
qrad: representing the radiant heat exchange quantity;
: representing the blackness of the surface of the ceiling material;
C0: representing the radiance factor of the community;
s: representing the surface area of a human body;
ts: indicating the surface temperature of the ceiling of the cold radiation air conditioning system.
4. The cold radiation air conditioning system temperature control method as claimed in claim 1, further comprising in said step S1:
and calculating according to a heat convection formula of the traditional air heat convection air-conditioning system to obtain the heat convection relation between the indoor air temperature and the surface area of the human body.
5. The method of claim 4, wherein the formula of convective heat transfer is:
Qcon＝hA×S×(37-TA)
wherein,
qcon: represents the convective heat transfer;
hA: representing the convection heat exchange coefficient of air and the surface of a human body;
TA: representing the equivalent indoor air operating temperature of the convective heat transfer air conditioning system.
6. The temperature control method of claim 1, wherein in step S2, the heat exchange equivalence principle of the different types of air conditioning systems is that the radiant heat of the cold radiation air conditioning system is equal to the convection heat exchange amount of the conventional air conditioning system.
7. The cold radiation air conditioning system temperature control method as claimed in claim 6, wherein in step S2, the balance equation is:
Qrad＝Qcon
8. the cold radiation air conditioning system temperature control method as set forth in claim 7, wherein in said step S2,
and substituting the radiation heat exchange relation and the convection heat exchange relation of the ceiling surface temperature and the surface area of the indoor human body of the cold radiation air-conditioning system and the convection heat exchange relation of the indoor air temperature and the surface area of the indoor human body into the balance equation according to the heat exchange equivalent principle of the different types of air-conditioning systems.
9. The cold radiation air conditioning system temperature control method as claimed in claim 1, wherein in said step S3, the relation between said indoor air temperature and the ceiling surface temperature of said cold radiation air conditioning system is:
10. a temperature control device for a cold radiation air conditioning system, comprising:
the cold radiation air conditioning system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the radiation heat exchange relationship between the ceiling surface temperature of the cold radiation air conditioning system and the surface area of an indoor human body and also acquiring the convection heat exchange relationship between the indoor air temperature and the surface area of the indoor human body;
the processing unit is used for establishing a balance equation according to the heat exchange equivalent principle of different types of air conditioning systems, the radiation heat exchange relation and the convection heat exchange relation;
a calculation unit for calculating based on the balance equation to obtain a relational expression between the indoor air temperature and a ceiling surface temperature of the cold radiation air conditioning system;
and the control unit is used for performing equivalent conversion according to a preset indoor air temperature by using a relational expression between the indoor air temperature and the ceiling surface temperature of the cold radiation air-conditioning system to obtain a corresponding set value of the ceiling surface temperature, and further adjusting the ceiling surface temperature of the cold radiation air-conditioning system.
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| CN113357799A (en) * | 2021-07-01 | 2021-09-07 | 绍兴艾能科技有限公司 | Method and system for dynamically tracking directional radiation of air conditioner and air conditioner device |
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| CN113357799A (en) * | 2021-07-01 | 2021-09-07 | 绍兴艾能科技有限公司 | Method and system for dynamically tracking directional radiation of air conditioner and air conditioner device |
| CN113357799B (en) * | 2021-07-01 | 2022-03-22 | 绍兴艾能科技有限公司 | Method and system for dynamically tracking directional radiation of air conditioner and air conditioner device |
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