Ventilatie RO-RO ENG.doc

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4. RO-RO VESSEL design guidelines for the HOLD VENTILATION SYSTEM

4.1 IntroductionCargo Ventilation Fan in Ro-Ro Vessel Size and location of the early decision with

respect to the hull structure and Steel Work Project to commence early in driving

accounts for a huge proportion.This successfully led the company, which was dried in a Ro-Ro Vessel's Cargo Hold

Vent. Fan's have been considered when determining the required quantity and Capacity

jeban musk "2" in the discussion, the actual 4401 / 2 line has been applied to the Vent.System, "3", introduced in the future thereafter by a similar Project design has been

somewhat helpful in the early planning stages are:

4.2 Design Considerations4.2.1 Restrictions

For Cargo Space Vent. System of one of the factors that determine the size of the spread

in the air in the working areas of the body is that it should not harm. In other words,

tolerance Hygiene (Hygienic Limits Value), and each should not exceed that specified inRule and Regulation Air Change Rate and Noise Level shall meet at the same time.

4.2.1.1 Sanitary tolerance HLV (Hygienic Limits Value) of the definition

Health Allowance (HLV) in the air that people breathe in a mixture of certain substances

or mixtures of certain substances that can be tolerated for an hour is defined as themaximum average concentration. Define the various units of this concentration is used

haneundeneun, Gas, vapor or dust (smoke. Fog) contained in the About This

concentration of contaminants mg /-Air is given by, the value addition, most PPM

( Parts Per Million) is also given by:The two HLV Threshold Level Value, Maximum Limit Value and Short-Term Limit

Value, which are three of the Vent. Calculation of the Threshold Level Value System isused primarily.* Threshold Level Value: During the entire operation for pollutants emitted to the

HLV

* Maximum Limit Value: 15 for pollutants emitted during the HLV* A Short Term Limit Value: measured concentrations of air that can be compared to

the approximate

Baseline (average value measured at least 15 minutes)

4.2.1.2 key pollutants

Gasoline, diesel, engine exhaust pollutants among Gas in the CO, NO, NO2, and Ben

tolerance for each country separately in health (HLV) is a regulation.In other words, in the workspace, to measure the degree of contamination of the air

pollutants are the most important CO (Carbon Monoxide), NO (Nitric Oxide), NO2

(Nitrogen Dioxide), and these three pollutants and other contaminants in the relationshipbetween The concentration of CO and NO in any particular threshold is lower than the

concentration of other pollutants do not have to worry about is not.

4.2.1.3 Air Change Rate


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The maximum allowable concentration of pollutants in addition to the regulations for the

minimum requirements for the Air Change Rate, which loaded the car to sail the vessel

within the explosive gas is generated when the Hold is intended to prevent accumulation,Loading / Unloading When the air is heavily polluted are provisions to prevent.

Air Change Rate on two requirements for consumers and business in each Authority or

Class Society, which DNV As an example, the lowest 6 Air Change / Hour are required.However, in some cases, Min. Supply Air Flow and 1ft3 / Minute / ft2-Deck Area (0.3M

/ Minute / m-Deck Area) is defined as:

4.2.1.4 Sound Levels

Cargo Space and Sound Level in Residential Area near the Upper Deck Ventilation

System of a significant influence on the design and operation. Two on the Measurement

of Sound Level requirements are defined, too.- N.M.D. The requirements.

* UPP Deck: 85 dB (A)

* Cargo Hold Area: 70 dB (A)

During loading / unloading where speech communication is required.* Cargo Hold Area: 90 dB (A)

Where no speech communication is required.

4.2.2 Ventilation

4.2.2.1 The purpose of VentilationOpen Deck area in a non-moving vehicles or cargo transported by the vehicle when the

vent. system of a goal contained in the exhaust of the vehicle pollutants is to avoid

focusing on one

However Vent. System is properly installed, despite the expected effect does not appearthere. In this case, Vent. System is easy enough to single-copy has been installed properly

the effects of inadequate at the same time in the Calendar section of the vehicle too much

and too often to come and go in the Loading / Unloading Plan may be caused.In other words, Ventilation System to prevent the concentration of the pollutant is in one

of the myriad ways available ppunimeul should keep in mind.

4.2.2.2 Ventilation System of the ship

Pipe or Duct System in the Calendar section soon as possible through the vehicle's

exhaust gases directly outside the already established a possible way in order to discharge

the ship's space is very limited, considering. Therefore, for the ship's Cargo Space Vent.In general, dilution ventilation is System (Dilution Vent.) Operated in accordance with

the principles of which the vehicle's exhaust gas mixed with air in general, sufficient to

be vented to the outside doeeoseo Supply Air Flow is raising. In this way, theconcentration of airborne contaminants can be kept as low as possible. Dilution

ventilation (Dilution Vent.) There are two major ways of Exhaust Air Vent. And Supply

Air Vent. Is a way.

(1) Exhaust Air Vent

By Fan discharge air from the schedule and Cargo Space, the Space Opening the Ramp

DOOR and the other came through the back by an external air is filled. In general,


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Exhaust Vent. System pressure at the Cargo Space "under atmospheric pressure (Sub-

Atmospheric Pressure)" is used when required by this "less than atmospheric pressure"

from the Cargo Space Cabin, Galley, such as the spread of contaminants out of town thatwill prevent.

(2) Supply Air VentThis Exhaust Air Vent. And is the opposite way, Fan of the outside air is supplied to

Cargo Space, Cargo Space was in the air the Ramp, and is discharged through the other

Opening. In this case, a slight rise in pressure within normal Cargo Space appears.But the ship's Vent. System is typically combine the above two methods, which can be

reversed by Fan of the outside air into the Cargo Hold and Supply may dispose of air

from the Cargo Hold can produce. However, Supply Air Terminal by the air flow more

air circulation in the Cargo Hold a greater influence, especially the fact that should beconsidered. It is the movement of air in the vicinity Exhaust Air Terminal Terminal near

the entrance to the only noticeable in a very small movement because.

4.2.2.3 dispersion of pollutantsAll Cargo Space and thoroughly mixed with the air pollution from or to maintain a

constant concentration is impossible. This is a different air flow phenomena, Cargo Spaceof a size and shape, Supply Air Opening of the structure and location, and set the amount

of Cargo, depending on location, etc. can be mixed with ambient air pollutants and was

the differences in the degree. Therefore, the entire Air Change in Cargo Space at verylow rate, which may not be, the air flow passage when there is any obstacle can cause

these symptoms.

In other words, the air flow, the flow distribution of the time retaining a steady state is

stable in general becoming a temper, but by the interference of a moving vehicle, and areinfluenced by external factors, such as, Cargo Space Air Change rate of change in locally

changing the concentration of exhaust gas concentration of pollutants also varies

accordingly.

4.2.2.4 Air Jets effects

Changes in the movement of air in order to give more permanent measures to be taken,one of these methods, a high-speed jet of air (Air Jets) to a device that can Vent. System

is to compensate for this device, the function of the secondary air jet air supply to be

spread to the entire Cargo Space, adjust the air, to flow, but the effect in the air jet (Air

Jets Effect) in the limit, the device close as possible to the required area for maximumeffect when there are available, Cargo Space, the less likely the movement of air within

the secondary air jet will increase the effectiveness of the device.

4.2.2.5 where the concentration of pollutants

Where the local concentration of pollutants is very varied, but generally the most

concentrated areas where the air vents and adjacent. For instance, a passenger in the CarDeck Ramp in normal use of the air inlet and the baechulyong Fan Deck is located at the

top of the front end. In this case, the average maximum concentrations of contaminants

away from the Ramp near the top of the front, that is the inside of the Car Deck: If the

exhaust Gas leaked out through the Car Deck Ramp on the inside of the air supply would


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be if the situation is reversed .

Because the symptoms are very important, Vent. Fan System's initial design should be

carefully considered when determining the location of the.

4.2.3 Determination of the required air flow.

4.2.3.1 the basic equationVent. System for the main purpose of using outside air is heavily polluted air in the

Calendar section in order to prevent the contamination of the vehicle containing the

diluted exhaust gas out the Calendar section of sikyeoseo would you want to remove.Thus, when the initial plan with a mixture of air and creates a complete discharge of

pollutants is needed to calculate the amount of outside air should be. In this case, the

following general formula uses.

.... .......................................................... (A)

Here, q = the amount of outside air pilyonghan m / sF = contaminant, mg / s

K = Sanitary tolerance, mg / m = dilution factor

= ambient air pollutants that are contained in

In this calculation, and the air full of pollutants, will be assumed as a mixture of

pollutants (F) and Sanitary Allowance (K) is on the shows. Also included in the

external air pollution () remit the special needs allowance, unless hygiene (K) 1 / 40, as

calculated by the vehicle per unit volume of air required in the calculation of the thumbwhen estimating the dilution factor () a Car Ferry from the ship, and 0.8 ~ 0.9, Ro-Ro

line is used and the value of 0.5 for Ro-Ro Ferry lines of the Car Deck Cargo Space and

the air is confirmed empirically by measuring the amount of value.The above expression (A) Calculate the required amount of air affects the basic elements

of the unknown, and the expression Vent. The initial plan, or installed on System Vent.

System can be a reference to evaluate.However, the expression (A) against the ship's Cargo Space required to calculate the

amount of air sikyigin a general, but here, in addition to supply a certain amount of

outside air pollutants in itself and its own, including the dilution factor and the fact that

should always be considered. In addition to health, without exceeding the tolerance thatcan be operated simultaneously on the details of the vehicle daetsu too seriously is one of

the elements that should be considered.

4.2.3.2 Pollutants (F) and Sanitary Allowance (K)

The most significant impact on the human body CO, NOX (Nitric Oxides), HC (Hydro

Carbon) each Authority for the as sanitary tolerance (maximum allowableconcentration: PPM) is defined and ~ for each vehicle exhaust gas

contained in the amount of pollutants (F) and has been shown.

maximum allowable concentration (PPM)


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Items

Author.

Carbon

Oxide

Nitrogen

OxideHydrocarbons

Number of

Air Change / hr

Sweden 60 5 1500 Min. 20

Norway 60 5 20

D. O. T.

(UK)

As Low as

Possible

As Low as

Possible

Min. 10

But HigherU. S. C. G 50 3 Adequate

Germany 50 5 Min. 20

Gasoline Engine: Cylinder Volume 1000 - 2200cm Ex) Passenger Cars

Operating CyclesPollution in mg/s

CO NOx HC

Idling (600 -

1000r/min)100 - 150 1 - 2 10 - 15

Constant Speed

15km/h

200 -250 3.3 - 3.5 15 - 20

Constant Speed

30km/h250 - 300 7 - 8.5 15 - 20

Acceleration 0.6m/s

(0 - 15km/h)250 - 300 5 - 6.5 15 - 20

Motor Braking

0.6m/s(15 - 0 km/h)110 - 140 1 28 - 33

Diesel Engine: Turbo-Supercharged Diesel Engine, Approximately 150kW

(200hk)Ex) Larger Lorries, Loaders and Larger Trucks

Operating Cycles Pollution in mg/sCO Nox HC NO2

Idling 20 - 30 17 - 25 15 - 25 5 - 8

Lift 2550r/min 170 10 - 100 ~ 100 5 - 50

Transport 2260r/min 150 600 - 700 ~ 130 25 - 30

Diesel: Suction Fed Diesel Engine With Air Storage Chamber, Approximately

150kW (200hk)

Ex) Larger Lorries, Loaders and Buses


CO Nox HC NO2Idling 20 - 25 25 - 30 2 - 4 8 - 9

Lift 2150r/min 50 - 60 10 - 130 10 - 15 5 - 65

Transport 2000r/min 130 - 150 100 - 225 15 - 35 4 - 9


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Diesel: Suction Fed Diesel Engine Without Air Storage Chamber, Approx.

130kW (180hk)

Ex) Lorries, Loaders and Buses


CO NOx HC NO2

Idling 20 - 25 15 - 20 10 - 15 5 - 6Lift 2200r/min 50 - 60 22 - 26 40 - 50 10 - 15

Transport 2200r/min 170 - 200 135 - 150 10 - 15 5 - 6

Diesel: Suction Fed Diesel Engine Without Air Storage Chamber, Approx.

74kW (100hk)Ex) Fork Trucks and Passenger Cars


CO NOx HC NO2

Idling 3 - 5 2 - 5 1 0.5 - 1.5

Lift 3000r/min 50 - 60 5 - 10 30 - 40 2.5 - 5

Transport 3000r/min 60 - 70 40 - 50 10 - 20 1.5 - 2.5

4.2.3.3 Experience of air required by

The outside of the vehicle exhaust and supply air may not be fully mixed and

contaminated outside air itself is already a few that should also be considered. That theexpression (A) Under normal conditions, the exhaust gas emitted relative to normal,

because the calculated volume of air required and the movement of air may differ from

actual cases, and the concentration of exhaust gas varies widely. Here each vehicle typeand driving conditions are required depending on the need to empirically according to the

following indicates the amount of air.

BASED ON "Short-term Limit Values" (Exposure over a Period about 15

Minutes)


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BASED ON "Treshold Level Value" (Exposure over a Period Greater than 15

Min. but not exceeding an 8-hour Day)


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4.2.4 Other considerations Conditions

The air is introduced from the outside of each section of Cargo Space and schedule to be

spreading, the shape of each Cargo Space Deck height, width, Web Frame and vary

greatly depending on the number of Bulkhead.In other words, Cargo, Vehicle, Ramp and Other Opening Cargo Space because of the

impact of air flowing from the passage can not assume clear.

In this case, to take into account various conditions, while at sea air supply should bespread evenly across the Cargo Space and Loading / Unloading when jobs are

concentrated in the space should be provided with outside air. Depending on the type of

vessel when considering the diversity of the latter (Loading / Unloading) uniformlysatisfy the requirements of the uniqueness of each ship is not easy because the people

who work and taking into account special circumstances Supply / Exhaust Duct size and

location, Opening size, and should be properly designed. On Supply / Exhaust

Duct layout of the basic method is shown on.In addition to the special circumstances of each vessel should be considered for the

following information.

the vehicle's exhaust gases before they spread to other areas should be removed as


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soon as possible.

outside air pollutants are particularly concentrated in the area and jobs are concentrated

in areasTo Supply / Exhaust Air should be located on the Opening.

how to deploy the basic Duct

Supply / Exhaust Opening of the possible Web Plate, Frame, and so located to avoidinterference by

Yahamyeo, one area in each Duct Opening shall have at least two.

Supply / Exhaust Opening the Max. Air Velocity at the Opening 10M / S is designed so

that it does not exceedShould be.

not place obstacles in the eye area and obscure Deck Height is low and easy to press

the exhaust gasDeck that jeokdoel near the bottom of the vehicle's bottom, and so also should be

considered. Deck Height of the high- natyie to adjust the flow of air along the Supply / ExhaustOpening of the

Location and number must be taken into consideration. according to the air

flow from the Deck Height represents the shape of

Shows the experimental values. less air resistance because it has the properties you want to move toward the most of

the air


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Cargo, Open Space through the vehicle's place tends to get away with.

silheomchi about air flow phenomena


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Line 4.3 in 4401/02 Hold Vent. System

4.3.1 Lay-out of Vessel and Design Condition

4.3.1.1 Vent. Compartment of Cargo HoldBelow Cargo Hold as an independent 6 (no.1 ~ no.6) formed in the district,

and each section, the Fixed Deck, Bulkhead Door, Rapms, etc., or by a Water Tight Gas

Tight is a.

4.3.1.2 Building Spec. On the basics

(1) Min. Air Change Rate

At Loading / Unload Condition: 20 Times / Hour At Navigation Condition: 10 Times / Hour

(2) Max. Gas Concentration

Cabon Monoxide: 35 PPM.

(3) Working Hour: 8 Hours / Day(4) Needed Air Amount: 7.5M3/sec/Car.

(5) Sound Level At Upper Deck: 85 dB (A) or less

At Cargo Hold: 85 dB (A) or less

(6) Wind Velocity (Air Flow) At Opening in Cargo Hold: 5 ~ 8 M / sec


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At Hull Opening: 10 M / sec or less

(7) Number of Driven Car Simultaneously

Hold Vent. Compartment

The following requirements in addition to Building Spec. The Duct of the batch, Electric

Motor, Steel Material, etc. about the default of a requirement imposed also include, but

are they in general deulrosseo design basically meet the doe was Specifications readinghere because it mentions did not.

Number and Diagram 4.3.2 Fan4.3.2.1 Fan-consuming calculations and Arrangement of

appears in each Vent. Compartment Fan because the areas to be completely

independent of the number of each of the first Comp. Shall determine the amount spent

by. To this end, each Deck. Broken down by volume for the Air Change (At Port andSea) and at the same time, depending on the vehicle operation to obtain the required

volume of air required in each case, the number of the Fan was calculated based on theactual installation, it should be the process that determines the number of Fan

are shown in

in the following ways: Sheet calculations are made.

indicates the term and each Deck, and Compartment, paragraph that the actual volume of term


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(M) is calculated by:

, term Building Spec.'s Requirement of 20-Air Change / Hour (At Port Condition), 10-Air Change / Hour (Sea Going Condition) that are required based on the Air Q'ty (m /

s) and 20Ach calculating, No.1 Deck the case of , , respectively 14,000

36000sec = 39m / sec will appear 10Ach 3600sec = 78m / s, 14,000 as

Building spec requirement of Section also simultaneously driving the vehicle that theaverage spend per car daetsu and air (7.5m / sec / Car), and the Air Q'ty calculatedbased on the inverse of the Air Changes were calculated.

In other words, No.1 Deck cases, the simultaneous operation so that the 7.5m / sec /

Car = 90m / Car = 90m / s, 90 vehicle 12 12 Car 14,000 m = 23 Ach is calculated

as:3600secFan Capacity protest decision shall be considered for a number of empirical factors. In other words, Fan bonhoseone used the Axial Flow Fan ("Flakt" Type FZMA-112) and

this is the characteristic curve of Fan , and appears as. However, Supply,Exhaust two cases differently in appearing Fan Impeller to the nature of the resulting

Pressure increased to reduce the impact, each Compartent that are installed on the Duct

to the nature of the resulting Pressure Drop an increase of as many uncertain factors tocompensate for the many empirical Capacity factors were determined Kami.

, and term , , and from the requirement to meet the Air Q'ty Min. 16 =

5EA is calculated as: 16 = 2.5EA, 90 16 = 49EA, 39 Fan shows the number and inthe case of each of No.1 Deck 78 In particular, if the Ro-Ro Port Condition of the line,

all Supply Fan Fan by two works, but some of the Sea Going Condition Supply Fan,Exhaust Fan as part of the whole because jakdongdoeeohya Reversible Fan Fan should be

part of. In other words, No.6 Compartment for in Section 6EA calculated as the

Supply Fan, and the corresponding Exhaust (Reversible) Fan to be Again 16 = 96m / s

ie 96 calculated, the a 6 (Sup.Fan) 11.2 9EA (Rev. Fan) is.

Pressure Drop for Each Compartment stars Fan Capacity As a rule of thumb, assumingthe No.4 ~ 6 Deck, No. 7 ~ 9 Deck, No.10 ~ 12 Deck for each of 15m / s, 14m / s, 13m

/ s were determined as:When calculated as above, ~ hangeseowa ago in Cargo Hold Min. The number Fan

, , , respectively in the case of 46EA, 70EA, 24/60/36EA calculated, but the Building Spec.'s Requirements in order to meet common concurrent operation of vehicles

in Port Condition daetsu calculated based on 70EA protest the Min. Fan is the number.However, the "2. Design considerations, "as described in the Cargo Hold Vent. Position

and Duct System in Cargo Space, depending on the shape of the pollutants in certain

areas of congestion is expected as early as possible to eliminate this phenomenon intoconsideration the experiential Fan has added four. Because of this that the actual

installation of a number of Fan / Air Q'ty / Air Change is a clauses: Fan of the Line ofthe total number of 74 pieces, and two 39 Dual Supply Fan, Reversible Fan two 34Exhaust (Only) Fan 1 is composed of pieces.

Fan in the calculated total of more than 74 places on each attribute, and the installation in

accordance with Compariment , and each show in the Deck of the Duct Arr't ~ is shown in


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CALCULATION SHEET (1 / 2)


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CALCULATION SHEET (2 / 2)


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FAN of the characteristic curve

4.3.2.2 the flow of air

in the Port Condition hangeseoneun Compartment to be supplied to eachDeck and Air Q'ty in which case they represent the flow of air within the Cargo Hold

Forth gijuneu were in the city.

Ie, that each Deck Supply Air on each Ramp, Door, Other Opening to the

outside through the exhaust passage, and the schedule shows the geometry.However, Cargo Hold a whole when it is operating as a work area with the

entire Supply Air moves through the passage, and if the schedule because, if real, whichcan vary from time to time and the operating conditions of each Compartment Ramp,

Door and other Opening of the lungs, depending on the status of the dog the amount of

air flow and will be changed.

In this regard, in the Line of No.1 and No.2 Deck Movable Ramp state, assuming theClose, No.1 and No.2 Deck was installing in the Air Opening the Air to be immediately

released into the atmosphere Air Outlet Opening on the Upper Deck was installed.

number and characteristics of FAN


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Vent. System (Deck No.1 ~ 3)


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Vent. System (Deck No.4 ~ 6)


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Vent. System (Deck No. 7 ~ 9)


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Vent. System (Deck No. 10 ~ 12)

Loading / Unloading the city air flow


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The calculation for 4.3.3 Duct

4.3.3.1 Typical ArrangementThe hull has been structured for each Duct In general, as shown in (A), but

such as is in Duct, (B) and Accommodation Ladder close to the same Duct special

consideration because it had to install.

Typical Arr't of Duct

4.3.3.2 the basic equation (For Pressure Drop Calculation)Friction loss and for each Duct Pressure Loss In order to calculate the following

expression is used.

Friction Loss:

Here, the

= Friction CoefficientL = Length of Duct [m]D = Hydraulic Diameter [m]

A = Duct Area [m]S = Duct Circumference [m]

Pd = Dynamic Pressure [Pa]


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= Specific Gravity of Air [kg / m]V = Velocity in Duct [m / sec]

Pressure Loss:

Here = Pressure Loss Coefficient,Pd = Dynamic Pressure

4.3.3.3 Example of Calculation (For Pressure Drop Calculation)

(1) Friction 'Loss:

Rectangular Duct Size: 0.7m2.4m

Air Flow: 15m / s Estimated Friction Coefficient: 0.15

Length of Duct: 6.5m

Under the above conditions,


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(2) Pressure Loss Air Flow Q'ty (Q) = 14m / s

Transition-Estimated: 60Pa

GA 0.7, Net Area = 0.8 Gross Area = 2.4Pressure Loss in Penetration = Difference in Dynamic Pressure

Same as

Bend Sharp 90 4 EA

= 1.4

T-Shape

= 1.6

At Opening: Pressure Loss= The Dynamic Pressure in Opening

Bend Sharp 90

= 1.4

Over Pressure in Hold: 50PaThis Total Pressure Loss:

PT. L a + +


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PT. L = 491Pa

(3) Pressure Loss reduction measures in the (B) if, Upper Deck to 12 Deck from Duct special shape of the full-

length and partial loss of pressure due to the very keunjeomeul full consideration to the

Ro-Ro line; 12 Deck with sufficient pressure air Impeller in order to supply a specialType of Fan Fan of using the Total Pressure Head as a way to increase the adoption, but

Example of calculation (2) - Bend Sharp 90 as shown in the case of pressure loss is

still largely appear. Bend 90 this in order to reduce the pressure loss in (i)the shape of (ii), (iii) can be transformed as:Where (2) - the previous figure, in the case of (i), (ii), (iii) When applied to

(i) PL = 4 1.4 41.7 = 233.3 Pa.

(ii) PL = 4 0.5 41.7 = 83.4 Pa.(iii) PL = 4 0.2 41.7 = 33.4 Pa

In other words Bend Duct, 90 geometry of (iii) By doing so, change the value to 1.4 to0.2 and the pressure loss is reduced to 33.3Pa in 233.3Pa can benefit from.

The Ro-Ro seoneseodo to get the same effect as above Bend Duct 90 and (iii) wasdesigned in the shape of.

Bend Duct 90 shape of

4.3.4 Noise Reduction

4.3.4.1 At Upper Deck

Upper Deck for Noise Reduction on each of the Fan of the as installed and ina separate Fan House Fan House as Wall Insulation with a thickness of 100mm and is

organized into Screen Pate Noise Level in the Upper Deck and Max. 85dB (A) has to

remain below. In particular, the Forward Part of Fan Fan House is installed in a speciallydesigned, Fan House Insulation wall thickness by more than 100 or Noise Reduction was

designed to achieve the effect.

4.3.4.2 At Cargo Hold as shown in Fan and Sound Absorber by installing Combind Hold within the

Noise Level two 85dB (A) were considered to be less than, Manual Damper Sound

Absorber installed in the fire, and emergency operations in the Hold to enable weremeasures.

Fan Noise Reduction, however, matters pertaining to the ship itself, in addition to the

noise caused by each piece of equipment that is installed on all outside noise and othernoise to be affected also by the uniform because the constant is calculated by the equation


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is difficult. Therefore, in Fan Noise Reduction Device for the estimated effects in the

design phase can be estimated only as an approximation measure is ready.

If the Upper Deck and the Cargo Hold bonhoseonui geonjowanryohu Noise Level is thereal measure of and, as appeared, the result value specified in the initial

design phase, and that each Authority Compared with baseline shows that very good

results is

Actual Noise Level of H.No. 4401 / 2

Position(Deck) Upper No. 1 No. 2 No. 3 No. 4 No. 5 No. 6

Noise Level :

dB(A)79.2 84.4 83 84.6 83.3 82.9 84

Position(Deck) No. 7 No. 8 No. 9 No. 10 No. 11 No.12

Noise Level :

dB(A)79.5 79.0 76.0 78.9 75.0 75.0 80.4

4.4 Conclusion

Which has been constructed in more than 4,410 company based in the / 2 line of the

Cargo Hold Vent System design considerations and the actual information that was

designed Vent. System for've gochalhae.However, as Ro-Ro lines and special Vent. System on a regular formula or reference for

the clean material shortage, especially in the human body harm pollutant type and

tolerance, and so for now in many ways being studied in the Free, because so farexperienced only by the numerous variables It is open to interpretation. Materials such as

described here, initial plans for the future at a similar Project Resources, shall be of a

think.

4.5 Resources

4.5.1 SIS Hand Book.150, 1st Edition, June.1982, Sweden

4.5.2 Svensk Standard SS 78 20 26. 1981-6-25. Sweden4.5.3 Svensk Standard SS 78 20 27. 1981-6-25. Sweden

4.5.4 Sf Review (Marine Edition). In 1973. Sweden.

4.5.5 Building Spec. For Daewoo H.No.4410 / 24.5.6 D.N.V Rule Book. N.N.D. Regulation

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