KR20160056471A - a designing method for HVAC duct system - Google Patents

Abstract

A method for designing an air conditioning system for supplying a gas flow to each zone through at least one main duct and at least one branch duct, the method comprising the steps of: Determining a required flow rate for each zone; Creating a layout including at least the main duct of the main duct and the branch duct; Determining a specification of at least the main duct among the main duct and the branch duct according to a required flow rate of each zone; And optimizing the main duct or the branch duct in a layout including the main duct and the branch duct while varying the specifications of the main duct or the branch duct.
A method of designing an air duct system according to the present invention is characterized in that a basic design for determining the dimensions of the main duct is performed through an analysis method such as equi-friction loss method or constant velocity method and a layout including branch ducts is extracted through a design drawing, It is possible to reduce the pressure loss by changing the diameter and the quantity and angle of the damper and to obtain the optimization design result that satisfies the required flow rate in each zone. Therefore, the flow rate error caused by the detailed design and the actual air conditioning system Can be greatly reduced.

Description

A designing method for HVAC duct system

The present invention relates to a method of designing an air duct system.

Generally, a large-scale structure such as a building, a transportation means such as an automobile, or a marine product such as a ship may be provided with an air conditioning system for air conditioning or ventilation. Heating Ventilation Air Conditioning (HVAC) is a system for heating, cooling, or ventilating air, which is used to comfort the indoor environment in which a person resides or stays.

In particular, such an air conditioning system can be said to be installed in all spaces where a person stays for a certain period of time and can be isolated from the outside. This is because if there is no circulation of air in the space isolated from the outside, it can harm the health of the person when he / she has stayed for a long time.

Such an air conditioning system is basically composed of a fan, which is an air conveying device, and a duct, which is a passage through which air is conveyed. The duct is connected to a main duct It can be designed in such a way that it branches into a plurality of branch ducts.

At this time, a diffuser is provided at the end of the duct to allow the air to smoothly diffuse in the space of each space, and a damper (hereinafter referred to as a damper), which can control the flow rate of air supplied through the duct, May be provided. Further, in addition to the basic ventilation, when the air conditioning system is implemented, a heat exchanger that changes the temperature and humidity of the air supplied to each zone may be additionally provided.

Such an air conditioning system can be designed with the target value of the flow rate of the air to be supplied to each zone. Conventional air conditioning system design methods are based on the layout of the duct, the size of the cross-section (size), and the position of the damper in order to confirm the required flow rate in each zone and to allow the intake air to be delivered to each zone on the basis of the fan (D & ID), and it will review the interference with other equipment in the space where the air conditioning system should be arranged by using the D & ID that has been completed with the basic design, and redesign it if necessary to complete the detailed design.

Since the air conditioning system is actually installed in the space based on the detailed design, the design is performed without consideration of the air flow distribution rate at the point of branching to the detailed ducts in the duct in the basic design. The specification of the determined main duct may be a specification that does not actually deliver as much air as necessary to each space.

Therefore, in order to solve such a problem, conventionally, an operator manually operated the angle of the damper installed in the duct and used a method of testing whether the required air is properly transmitted to each zone. However, in such a case, there is a problem that the period from the completion of the production to the delivery of the ship (test-drive period) becomes longer in the case of a ship or the like because an additional period is required for the operator to operate and test the damper.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide a method and a system for determining a design (diameter, etc.) Based on the layout containing ducts, optimal results are obtained that allow sufficient air to reach each zone while varying the duct diameter and / or the quantity, position, and angle of the damper, And to provide a method of designing a ventilation duct system that can greatly shorten the time required for the test.

Further, the object of the present invention is to improve the air conditioning efficiency by improving the diameter of the duct, the quantity of the damper, the pressure loss, etc. since the detailed design is completed through optimization through the layout including both the main duct and the branch duct And a method of designing an air duct system that can reduce manufacturing cost.

It is also an object of the present invention to provide a system and a method for analyzing noise and / or vibration for each zone based on a detailed design of a layout including a branch duct and / or a damper, And to provide a method of designing a ventilation duct system that allows the user to accurately identify and quickly cope with the problem.

A method for designing an air conditioning duct system according to an embodiment of the present invention is a method for designing an air conditioning system for supplying a gas flow to each zone through at least one main duct and at least one branch duct, Determining a required flow rate for each zone; Creating a layout including the main duct and the branch duct; Determining a specification of the main duct and the branch duct according to a required flow rate of each zone; And optimizing the main duct or the branch duct in a layout including the main duct and the branch duct while varying the specifications of the main duct or the branch duct.

Specifically, in the step of determining the specification of the duct, the cross-sectional size of the duct can be determined by using the equal friction loss method or the constant velocity method.

Specifically, the optimizing step may derive specifications of the main duct and the branch ducts such that the pressure loss value of the air conditioning system reaches a predetermined target value and the necessary flow rate of each zone is satisfied.

Specifically, the optimizing step comprises: determining a variable range of the specification; Analyzing the flow rate of each of the sections while varying the size of the main duct or the branch duct that can be varied according to the variable range; And outputting the specifications of the main duct and the branch duct when the necessary flow rate of each zone is satisfied as an optimization value.

Specifically, the optimizing step comprises: determining a variable range of the specification; Setting a target value of a pressure loss value of the air conditioning system; Analyzing the pressure loss value and the flow rate of each zone while varying the size of the main duct or the branch duct that can be varied according to the variable range; And outputting, as an optimization value, the specifications of the main duct and the branch duct when the pressure loss value reaches the target value and the required flow rate of each zone is satisfied.

Specifically, the optimizing may further include selecting the variable duct or the branch duct.

Specifically, the method may further include standardizing the specifications of the main duct and the branch duct.

Specifically, the method may further include interpreting the noise level of each zone by using the gas flow in the layout, and the specifications of the main duct and the branch duct.

Specifically, in analyzing the noise level, the noise level can be analyzed using the specifications of the main duct and the branch duct and the flow rate of the gas flow.

A method of designing an air duct system according to the present invention is characterized in that a basic design for determining the dimensions of the main duct is performed through an analysis method such as equi-friction loss method or constant velocity method and a layout including branch ducts is extracted through a design drawing, It is possible to reduce the pressure loss by changing the diameter and the quantity and angle of the damper and to obtain the optimization design result that satisfies the required flow rate in each zone. Therefore, the flow rate error caused by the detailed design and the actual air conditioning system Can be greatly reduced.

Also, the method of designing an air duct system according to the present invention is compared with a conventional method of installing an air conditioning system using only the duct dimension determined in the basic design, because the dimension is optimized by considering the branch duct together with the main duct at the detailed design stage It is possible to innovatively reduce the commissioning period after the installation and to reduce the number of dampers in designing, thereby reducing costs.

Further, the method of designing an air duct system according to the present invention performs noise and vibration analysis using a layout in which detailed design has been completed, and accurately grasps a part where noise or vibration is severe, that is, a part requiring a separate silencer , It is possible to quickly cope with the increased noise due to the air conditioning system.

1 is a flowchart of a method for designing an air conditioning duct system according to an embodiment of the present invention.
2 is a view showing a layout of an air conditioning system according to an embodiment of the present invention.
FIG. 3 is a view showing the equal friction loss method and the constant velocity method in the method of designing an air conditioning duct system according to an embodiment of the present invention.
FIG. 4 is a graph showing a flow rate of each zone before optimization in the method of designing an air conditioning duct system according to an embodiment of the present invention.
5 is a detailed flowchart of step S140 in the method of designing an air conditioning duct system according to an embodiment of the present invention.
FIG. 6 is a graph showing the flow rate of each zone after optimization in the method of designing an air conditioning duct system according to an embodiment of the present invention.
7 is a flowchart of a method for designing an air conditioning duct system according to another embodiment of the present invention.
8 is a detailed flowchart of step S240 in the method of designing an air conditioning duct system according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart of a method for designing an air conditioning duct system according to an embodiment of the present invention.

1, a method for designing an air conditioning duct system according to an embodiment of the present invention includes: providing at least one main duct 10 and at least one branch duct 20 to supply a gas flow to each zone A method for designing an air conditioning system (1), comprising the steps of: (S110) determining a required flow rate of each zone to which the air conditioning system (1) is connected; generating a layout including the main duct (10) A step S130 of determining the specifications of the main duct 10 and the branch duct 20 according to the required flow rate of each zone and a step S130 of determining the specifications of the main duct 10 and the branch duct 20 in the layout including the main duct 10 and branch duct 20 A step S150 of optimizing the dimensions of the main duct 10 or the branch ducts 20 by varying the dimensions of the main ducts 10 or the branch ducts 20, a step S150 of standardizing the specifications of the main ducts 10 and the branch ducts 20, The main duct 10 and the branch duct 20, And a step (S160) for measuring a noise level for each zone.

In step S110, the air conditioning system 1 determines the required flow rate for each zone to which it is connected. In each zone, the numerical value of how much air should be supplied can be determined, depending on the scale. For example, where a person is a resident area, the required flow volume by volume may be larger than other areas.

The required flow rate for each zone may vary depending on the purpose or size of each zone in which the air conditioning system 1 is installed, and the present invention is not particularly limited thereto. That is, the required flow rate per zone can be determined in various ways.

In step S120, a layout including the main duct 10 and branch ducts 20 is generated. The layout referred to in the present invention will be described in detail with reference to Fig.

2 is a view showing a layout of an air conditioning system according to an embodiment of the present invention.

2, an air conditioning system 1 according to an embodiment of the present invention includes a main duct 10, a branch duct 20, and a damper 30 that is an object to be optimized in another embodiment.

The main duct 10 is for delivering a gas flow such as air supplied from the outside through a fan (not shown) to each zone where the air conditioning system 1 is installed. The main duct 10 is a structure for delivering the gas flow to the branch ducts 20 provided in each zone, rather than supplying the gas flow to each zone. Also, the main duct 10 may be provided to discharge the air in each zone to the outside. In this case, the main duct 10 actually does not directly discharge the gas flow in each zone, The gas flow discharged through the branch duct 20 can be transmitted to the outside. That is, the main duct 10 connects between the outside and the branch ducts 20, and the outside of the main duct 10 may mean not only the outside but also the outside space of the main duct 10 where the fan is installed.

The cross-sectional area of the main duct 10 can be reduced as the distance from the fan is increased. This is because the cross-sectional area of the main duct after branching into branch ducts can only provide a sufficient flow rate of gas flow to the distant region from the fan.

The main duct 10 may have a circular or elliptical cross section or a quadrilateral such as a rectangle or a square. The cross section of the ducts 10 and 20 may vary depending on the diameter when the main duct 10 has a circular cross section and the cross section of the ducts 10 and 20 And may be varied depending on the lateral width. This is because when the cross section of the main duct 10 is rectangular, the height can be limited by the installation space.

The fan that supplies the gas flow to the main duct 10 can suck the outside air and deliver it to the main duct 10 or can supply the main duct 10 after changing the temperature of the outside air. To this end, the air conditioning system 1 may further include a heat exchanger (not shown) for forming cold air or warm air using a refrigerant or the like.

The main duct 10 can transfer the air whose temperature is varied by the heat exchanger to a position adjacent to each zone where the air is delivered to the respective zones via the branch ducts 20, You can make it fit. Or a heat exchanger may be provided at a portion where the branch duct 20 is connected to the main duct 10.

A branch duct (20) delivers the gas flow supplied from the main duct (10) to each zone. The branch ducts (20) are connected directly to the respective zones so that the gas flow supplied along the main duct (10) through the fans can be supplied to the respective zones. The branch duct 20 can circulate the air in each zone by transferring the air in each zone to the main duct 10.

The branch ducts 20 may be connected to the main duct 10 in a plurality of ways and may be connected as branches as in the case of terminology. At this time, the cross-section of the branch duct 20 may be smaller than the cross-section of the main duct 10, and the gas flow supplied to the branch duct 20 may be branched from the flow of the main duct 10.

That is, when the air is supplied from the fan, the gas flow is supplied to the end of the main duct 10, so that some gas flows can be branched to the respective ducts 20 and transferred to the respective zones. On the contrary, when the air in each of the zones is exhausted, the gas flow introduced into the main duct 10 through the branch ducts 20 can be merged with each other in the main duct 10 and discharged to the outside.

That is, the branch duct 20 is configured to directly transfer the gas flow supplied through the main duct 10 to each zone, and may be branched to the main duct 10. In other words, the layout may correspond to a flow system indicating a blood vessel. In this case, the main duct 10 means a vein or an artery, and the branch duct 20 means a capillary vessel.

The damper 30 is provided in the main duct 10 or the branch duct 20 and adjusts the pressure loss of the main duct 10 or branch duct 20 according to the angle. For example, the damper 30 is provided at a branching point of the branch duct 20 in the main duct 10 and narrows the cross-sectional area of the branch duct 20 to increase the pressure loss of the gas flow supplied to the branch duct 20 .

When the angle of the damper 30 is 0 degree, the sectional area is not decreased. When the angle is 90 degrees or -90 degrees, the damper 30 is not rotated. The cross-sectional area can be sealed. Of course, the numerical value of the angle may vary depending on the definition of the reference value. In the present specification, the angle of 0 degree may mean that the damper 30 is fully opened.

The reason for installing the damper 30 is that it is difficult to satisfy the required flow rate smoothly in each zone only by designing using the main duct 10 and the branch duct 20. [ In other words, the shape of the main duct 10 and the branch duct 20 is limited, and the required flow rate required in each zone may vary. Therefore, the air conditioning system 1 needs to utilize the damper 30 to assist each zone The flow rate can be adjusted.

The optimization of the damper 30 will be described with reference to another embodiment. Hereinafter, the embodiment in which the main duct 10 and the branch duct 20 are optimized will be described in detail.

The layout creation in step S120 may be performed using a computer program such as CAD or the like, and may be generated according to designing with a D & ID (Ducting and Instrumentation Diagram). D & ID is a diagram showing the flow of gas flow and flow by zone in the drawing of the zone.

However, the main duct 10 included in the layout in step S120 may be the same as or similar to the design value of the diameter of the air conditioning system 1 or other similar air conditioning system 1, and may be a value that does not match the required flow rate of each zone have.

In step S130, the specifications of the ducts 10 and 20 are determined according to the required flow rate of each zone. Specifically, in step S130, the cross-sectional size of the ducts 10 and 20 can be determined using the equal friction loss method or the constant velocity method. This will be described in detail with reference to FIG. 3 and FIG.

FIG. 3 is a view showing the equal friction loss method and the constant velocity method in the method of designing an air conditioning duct system according to an embodiment of the present invention. In FIG. 3, the diameters of the ducts 10 and 20 are represented by a plurality of parallel slanting lines inclined to the left from the upper end to the lower end, and the velocity is represented by a plurality of parallel slanting lines inclined to the right from the upper end to the lower end, , And the vertical axis indicates the flow rate.

In this case, the diameter is a value for determining the cross-sectional size of the ducts 10 and 20 when the cross-sections of the ducts 10 and 20 are circular. However, in this case, the diameter of the ducts 10 and 20 in FIG. 3 may be changed to the equivalent diameter calculated by using the values of the widths of the ducts 10 and 20 in this case, since the cross section of the main duct 10 may be a square.

Referring to FIG. 3, in the method of designing the air conditioning system 1 according to the embodiment of the present invention, the specifications of the ducts 10 and 20 are determined by the friction loss method (Equi-friction method), or the equi-velocity method in which the diameter is determined when the flow rate and the velocity are input as variables.

However, the specifications of the ducts 10 and 20 determined by the equal friction loss method or the constant velocity method shown in FIG. 3 may be a specification that does not satisfy the required flow rate when the air conditioning system 1 is actually installed. This is because the gas flow by the branch duct 20 is not taken into account as the layout at step S120 does not include the branch duct 20. [

Therefore, the present embodiment can solve this problem by implementing the optimization after including the branch duct 20. This will be described later in the following step S140.

4 is a view showing flow rates of respective zones before optimization in the method of designing an air conditioning duct system according to an embodiment of the present invention.

Referring to FIG. 4, when the diameters of the ducts 10 and 20 are determined by the constant velocity method or the equal friction loss method through the step S130 in the method of designing the air conditioning system 1 according to the embodiment of the present invention, Since the gas flow branched through the duct 20 is not considered, the required flow rate (Design value in FIG. 4) of each zone that the air conditioning system 1 has to implement is determined by the air conditioning 4) of the system 1 (including the main duct 10 and the branch duct 20 but determined by the value of the main duct 10 at the step S130) As shown in Fig.

That is, if the specification of the main duct 10 is determined in a situation where the branch duct 20 is not considered, a situation may occur in which the flow rate is insufficient or excess in each zone, It is possible to cause a situation that can not be realized. Therefore, the present embodiment can solve such a problem by implementing the optimization considering the branch duct 20. [

In step S130, a layout including the main duct 10 and the branch ducts 20 is generated.

The layout in step S130 can be separately designed with the D & ID, or can be generated by fetching data from 2D or 3D design drawings (CAD drawings, etc.) designed for the space including the air conditioning system 1. [

The layout in step S130 has the same form as the air conditioning system 1 actually installed. This is because it includes the branch duct 20, and also draws data from the drawing of the space where the air conditioning system 1 is installed and uses it.

In step S140, the main duct 10 and the branch duct 20 are optimized while varying the specifications of the main duct 10 or the branch duct 20 in the layout including the main duct 10 and branch duct 20. [ If the specification of the main duct 10 is determined through the constant velocity method or the like in the layout including the main duct 10 as described above with reference to FIG. 4, since the branch duct 20 can not be considered, (1) The required flow rate of each zone may not be satisfied when applied.

Therefore, in step S140 of the present embodiment, the optimization operation is performed on the layout including the branch ducts 20, so that the required flow rate of each zone calculated as a target when designing the air conditioning system 1 is designed To match the flow rate of each zone actually appearing at time. Hereinafter, the details of step S140 will be described with reference to FIG.

5 is a detailed flowchart of step S140 in the method of designing an air conditioning duct system according to an embodiment of the present invention.

Referring to FIG. 5, in the method of designing an air conditioning system 1 according to an embodiment of the present invention, step S140 includes a step S141 of selecting a main duct 10 or a branch duct 20 which can be varied, (S142) of setting the target value of the pressure loss value of the air conditioning system 1 (S143); determining whether the variable duct size of the main duct 10 or the duct 20 is variable according to the variable range (S144), measuring the pressure loss value and the flow rate of each zone (S144), determining the specifications of the main duct (10) and branch duct (20) when the pressure loss value reaches the target value and the necessary flow rate for each zone is satisfied And outputting it as an optimization value (S145).

In step S141, the main duct 10 or branch duct 20 which is variable is selected. This is because the main duct 10 or the branch duct 20, which can not be changed, may exist. The ducts 10 and 20, which can not be changed, refer to changes in the diameter, etc. due to restrictions on interference with other equipment The ducts 10 and 20 can not be connected.

The main duct 10 or branch duct 20, which is variable, can be selected by the user. Of course, step S141 may be omitted if all the ducts 10 and 20 are variable.

In step S142, the variable range of the specification is determined. The specification may refer to the diameter of the ducts 10 and 20 and the variable range of the specification means the extent to which the diameter can be increased or reduced to some extent, will be. This can also be determined according to the installation constraints of the ducts 10, 20, or can be determined to facilitate gas flow. For example, in the case of the main duct 10, the cross sectional area should be continuously reduced along the gas flow direction, so that the variable of the specification can be set to follow this basic rule.

In step S143, the target value of the pressure loss value of the air conditioning system 1 is set. In the present invention, when the optimization is performed with the branch duct 20 included, the pressure loss value generated in the gas flow can be reduced. Accordingly, in step S143, a target value for the pressure loss value may be set to derive a specification for which the pressure loss is the lowest.

In step S144, the pressure loss value and the flow rate of each zone are measured while varying the specifications of the main duct 10 or branch duct 20 that can be varied according to the variable range. The size of the main duct 10 and the branch duct 20 may be variable in size, and the size of the duct may be changed several times. The pressure loss value may be a value obtained by dividing the power loss of the air conditioning system 1 Value. ≪ / RTI >

When the specification is changed, the pressure loss value or the zone flow rate is changed. The lowering of the pressure loss value means that there is a margin to lower the capacity of the fan. However, if optimization is performed based only on the pressure loss value, it may not be possible to adjust the required flow rate of the area. Accordingly, in step S144, while the specifications of the main duct 10 and the branch ducts 20 are continuously changed, the flow rate of each zone to which the air conditioning system 1 is connected is checked, and at the same time, You can proceed.

In step S145, the specifications of the main duct 10 and the branch duct 20 are output as optimization values when the pressure loss value reaches the target value and the required flow rate for each zone is satisfied. If the cross-sectional size of the main duct 10 or the branch duct 20 is excessively variable, a case where the required flow rate per zone can be naturally obtained can be derived. However, in this case, as the pressure loss value becomes larger, a high-capacity fan may be required.

Therefore, the present invention compares the pressure loss value with the target value whenever the specifications of the main duct 10 and the branch duct 20 are changed, and at the same time, confirms whether the flow rate per zone satisfies the required flow rate, Can be output as an optimization value. Of course, the optimization values may be output in more than one way.

Also, the required flow rate of the zone is satisfied when the flow rate of the zone exceeds the required flow rate, or when the flow rate of the zone is less than the required flow rate of the zone, the flow rate is close to the required flow rate within a certain range .

FIG. 6 is a graph showing the flow rate of each zone after optimization in the method of designing an air conditioning duct system according to an embodiment of the present invention.

Referring to FIG. 6, when the optimization process of step S150 is performed in the method of designing the air conditioning system 1 according to the embodiment of the present invention, the air conditioning system (The design value in Fig. 6) of the respective zones to be implemented by the air conditioning system 1 and the air conditioning system 1 (optimized in the state including the main duct 10 and the branch duct 20) The flow rate (Analysis value in FIG. 6) transmitted to each zone may be the same or very similar.

Therefore, the present embodiment can optimize the state in which the branch ducts 20 are considered, thereby lowering the pressure loss, and at the same time, satisfying the required flow rate of each zone, thereby greatly improving the design completeness of the air conditioning system 1. [

In step S150, specifications of the main duct 10 and branch ducts 20 are standardized. The dimensions of the main duct 10 and the branch ducts 20 may be determined during the manufacturing process. For example, it is most preferable to apply the ducts 10 and 20 having a diameter of 191 mm to the air conditioning system 1 if the diameter of the cause originating from the optimized value is 191 mm. However, if it is common that the diameter of the ducts 10 and 20 is 190 mm, 195 mm, 200 mm, and the like, the ducts 10 and 20 of 191 mm are manufactured at a spacing of 5 mm. , And 190mm, it is desirable to reduce the manufacturing cost by changing the specification again.

Therefore, the specifications of the ducts 10 and 20 output as optimization values can be adjusted to the specifications of the ducts 10 and 20 commonly used through standardization, and this can be performed in a manner of converting to the standard value closest to the optimization value have.

However, since the specifications of the ducts 10 and 20 thus standardized are changed again after the optimization, the analysis of the pressure loss values and the flow rates of the respective zones can be reaffirmed. At this time, if a problem occurs in the flow rate of each zone, the air conditioning system 1 can be implemented by customizing the ducts 10 and 20 without standardization, or at least a part of the ducts 10 and 20 can be standardized.

In step S160, the noise level of each zone is measured using the gas flow in the layout and the specifications of the main duct 10 and branch duct 20. [ Steps S110 to S150 are optimized for the specifications of the ducts 10 and 20 through the gas flow, and step S160 is for checking the noise / vibration through the optimized ducts 10 and 20. That is, even if the noise level of a specific zone is high in step S160, the specifications of the ducts 10 and 20 installed in the zone may not be changed.

The noise level can be measured using the flow rate and the flow rate of the gas flow, and of course, the specifications of the ducts 10 and 20 can be included in the calculation process. The noise level can be calculated in units of dB, and in a zone where the dB is high, it is possible to solve the problem of installing a sound absorbing material or the like and showing a high noise level.

However, step S160 of the present invention measures the degree of flow noise due to gas flow, so that the analysis of vibration noise generated by various mechanical equipments can be omitted.

Thus, in the present embodiment, the basic specifications of the main duct 10 are set through the layout including the main duct 10 by the constant velocity method or the like, and then the optimization process is performed using the layout further including the branch ducts 20. [ It is possible to prevent the gap between the performance when the designed air conditioning system 1 is actually applied and the target performance of the air conditioning system 1 from occurring, thereby improving the efficiency of the design and production work.

7 is a flowchart of a method for designing an air conditioning duct system according to another embodiment of the present invention.

The method of designing the air conditioning system 1 according to another embodiment of the present invention may further consider the damper 30 in the layout in comparison with an embodiment. Hereinafter, different embodiments will be described with emphasis on differences from one embodiment.

As described later, in another embodiment, a part considering the branch duct 20 is omitted. In the present invention, the basic specification of the main duct 10 is set from the layout including the main duct 10 by the constant velocity method or the like, It is possible to include another embodiment in which the optimizing operation is performed by taking both the branch duct 20 and the damper 30 into consideration.

7, a method for designing an air conditioning system 1 according to another embodiment of the present invention is a method for designing an air conditioning system 1 according to another embodiment of the present invention. The method includes providing at least one main duct 10 and at least one damper 30, A method for designing a system (1), comprising the steps of: determining a required flow rate for each zone to which the air conditioning system is connected (S210); generating a layout including a main duct (10) and a damper A step S230 of determining the specification of the main duct 10 according to the required flow rate of each zone, a step S230 of varying the angle of the damper 30 in the layout including the main duct 10 and the damper 30 (Step S240), analyzing the noise level of each zone using the gas flow in the layout, the specification of the main duct 10, and the angle of the damper 30 (S250). However, the main duct 10 according to the present embodiment may refer to the ducts 10 and 20 including the branch ducts 20 in the above embodiment. Hereinafter, for the sake of convenience, the main duct 10 is limited to the main duct 10 Explain.

In step S210, the air conditioning system 1 determines the required flow rate for each zone to which it is connected. Since step S210 is the same as or similar to step S110 already described in the embodiment, detailed description will be omitted.

In step S220, a layout including the main duct 10 and the damper 30 is generated. The layout generated in step S220 may include a damper 30 in addition to the main duct 10. [ However, the damper 30 may be provided at the branch duct 20 or at a point where the main duct 10 or the branch duct 20 is connected to the main duct 10. In the layout generated in step S220, 10 and the damper 30, the duct 20 may be further included.

In step S230, the specification of the main duct 10 is determined according to the required flow rate of each zone. Step S230 also includes the same contents as step S130 described in the embodiment, and a description thereof will be omitted.

In step S240, the damper 30 is optimized while varying the angle of the damper 30 in the layout including the main duct 10 and the damper 30. This will be described in detail with reference to FIG.

8 is a detailed flowchart of step S240 in the method of designing an air conditioning duct system according to another embodiment of the present invention.

Referring to FIG. 8, in the method of designing an air conditioning system 1 according to another embodiment of the present invention, step S240 includes a step S241 of selecting a variable damper 30, a step S242 of determining a variable range of an angle A step S243 of setting a target value of the pressure loss value of the air conditioning system 1, a step of analyzing the pressure loss value and the flow rate of each zone while varying the angle of the variable damper 30 according to the variable range S244), a step S245 of outputting an optimum value of the angle of the damper 30 when the pressure loss value reaches the target value and the necessary flow rate of each zone is satisfied (S245), the step of optimizing the angle (S246).

In step S241, the variable damper 30 is selected. The reason for selecting the variable damper 30 is that there may be a damper 30 that can not change the angle, which is due to design constraints as described in step S141. At this time, in step S241, in addition to the variable damper 30, the main duct 10 which can be changed can be selected.

In step S242, the variable range of the angle is determined. The variable range of the angle is formed from 90 degrees to 90 degrees when the maximum opening angle is 0 degree, and the user can limit it to 30 to 40 degrees. The variable range of angles may also be due to design or fabrication limitations as in step S242.

In the step S242, the variable range can be determined with respect to the angle of the damper 30, and in addition, it can be set to the specifications such as the diameter of the main duct 10, as well. This is to make it possible to vary both the angle of the damper 30 and the specification of the main duct 10 at the time of optimization.

In step S243, the target value of the pressure loss value of the air conditioning system 1 is set. The setting of the target value of the pressure loss value is the same as that of step S143 of the embodiment, and thus a detailed description thereof will be omitted.

In step S244, the pressure loss value and the flow rate of each zone are analyzed while changing the angle of the variable damper 30 according to the variable range. By varying the angle of the damper 30, the flow of gas to each zone can be changed. At this time, if the angle of the damper 30 is optimized, it is possible to reduce the capacity of the fan by reducing the pressure loss value while allowing the flow rate of the zone to meet the required flow rate of each zone.

Variable in step S244 may be the angle of the damper 30 as well as the dimension of the main duct 10. [ That is, in this embodiment, the angle of the damper 30 is varied, and at the same time, the optimization of the main duct 10 can be performed by checking the flow rate and the pressure loss value of each zone while varying the specifications of the main duct 10.

As described above, the variable in step S244 may include the dimensions of the branch duct 20 in addition to the angle of the damper 30 and the specifications of the main duct 10. The present invention can be applied to the damper 30 and the main duct 10 ) And the branch duct 20 are both included in the layout.

In step S245, the angle of the damper 30 when the pressure loss value reaches the target value and the necessary flow rate for each zone is satisfied is output as an optimization value. However, the specification of the main duct 10 may be output as an optimum value together with the angle of the damper 30.

In step S246, the damper 30 whose optimization value of the angle is the maximum opening angle is removed. The maximum opening angle (for example, 0 degree) means that the damper 30 is fully opened. That is, in this case, the damper 30 is unnecessarily installed and is preferably removed.

Therefore, in this embodiment, the number of dampers 30 installed can be reduced in the process of optimizing the damper 30, so that the manufacturing cost of the air conditioning system 1 can be reduced.

In step S250, the noise level of each zone is analyzed by using the gas flow in the layout, the specification of the main duct 10, and the angle of the damper 30. [ The noise analysis can be measured using the flow rate and the flow rate of the gas flow similar to that described in step S170, and the measured noise figure can be utilized for examining the necessity of installing a sound absorbing material.

As described above, in the present embodiment, the specification of the main duct 10 is initially set by using the layout including the main duct 10, and the optimization operation is performed through the layout further including the damper 30, It is possible to realize a design that can reduce the pressure loss while satisfying the flow rate, thereby greatly improving the completeness of the air conditioning system 1, thereby lowering the unit cost of the air conditioning system 1 and reducing the installation work flow.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: air conditioning system 10: main duct
20: branch duct 30: damper

Claims (9)

A method for designing an air conditioning system for supplying a gas flow to each zone via at least one main duct and at least one branch duct,
Determining a required flow rate of each zone to which the air conditioning system is connected;
Creating a layout including at least the main duct of the main duct and the branch duct;
Determining a specification of at least the main duct among the main duct and the branch duct according to a required flow rate of each zone; And
And optimizing the dimensions of the main duct or the branch duct in a layout including the main duct and the branch duct, while varying the specifications of the main duct or the branch duct. 2. The method of claim 1, wherein determining the dimensions of the duct comprises:
Wherein the cross-sectional size of the duct is determined using an equal friction loss method or a constant velocity method. 2. The method of claim 1,
Wherein the specifications of the main duct and the branch duct are derived so that a pressure loss value of the air conditioning system reaches a predetermined target value and a required flow rate of each zone is satisfied. 2. The method of claim 1,
Determining a variable range of the specification;
Analyzing the flow rate of each of the sections while varying the size of the main duct or the branch duct that can be varied according to the variable range; And
And outputting the optimized values of the main duct and the branch duct when the required flow rate of each zone is satisfied. 2. The method of claim 1,
Determining a variable range of the specification;
Setting a target value of a pressure loss value of the air conditioning system;
Analyzing the pressure loss value and the flow rate of each zone while varying the size of the main duct or the branch duct that can be varied according to the variable range; And
And outputting, as an optimization value, the specifications of the main duct and the branch duct when the pressure loss value reaches the target value and the required flow rate for each zone is satisfied. . 6. The method of claim 4 or 5,
Further comprising the step of selecting the main duct or the branch duct which is variable. The method according to claim 1,
Further comprising the step of standardizing the specifications of the main duct and the branch ducts. The method according to claim 1,
Further comprising the step of analyzing the noise level of each zone by using the gas flow in the layout and the specifications of the main duct and the branch duct. 9. The method of claim 8, wherein interpreting the noise level comprises:
Wherein the noise level is analyzed by using the flow rate of the gas flow and the specifications of the main duct and the branch duct.

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