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ATTACHMENT NO. 01 02 - -
NUMBER OF PAGES 3 2 - -
DOCUMENT NO. DOC. NO. 12 - 42 09 050 - BG
02 09/5/12 Categorizing Eq.I Gusti N. Dirgantara Ir. Dwi Priyanta, MSE. Ir. Hari Prastowo, MSc.
01 04/4/12 Document Format
REV. DATE DESCRIPTION PREPARED BY CHECKED BY APPROVED BY
DESIGN-IV: MACHINERY BASIC DESIGN
DESIGN-IV: MACHINERY BASIC DESIGN TECHNICAL SPECIFICATION OF OILY WATER
SEPARATOR (OWS) SYSTEM
- -
- -
DOC. NO. 12 - 42 09 050 - BG
Ir. Hari Prastowo, MSc.
APPROVED BY
DESIGN-IV: MACHINERY BASIC DESIGN
DESIGN-IV: MACHINERY BASIC DESIGN TECHNICAL SPECIFICATION OF OILY WATER
b. Marine Engineering, Roy L. Harrington, "Chapter XX - Piping System" :1971
3 ABBREVIATIONS
vs = Velocity of fluid
dm = Inside diameter
t = Wall thickness and time
Q = Qapacity
Rn = Reynold number
n = viscocity
hs = head static
hp = head pressure
hv = head velocity
hf = head friction
hl = head losses
H = head total
4 DESIGN PARAMETER
4.1 The summary of Doc. No. 11 - 42 09 050 - BG
NO CALCULATION SYMBOL RESULT
1 inside diameter of bilge pipe dH 8.75 inches
2 inside diameter branch bilge line dZ 4.97 inches
3 capacity of bilge pump Q 283.83
4 head total pump H 24.46 m
Bilge Pump Specification
Merk = Hyundai
Type = HCP300
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
In this document, we will design a bilge system in the engine room. In the engine room, we will find an leakage of oil that became from any machinery and pipe. Therefore, the oily bilge system is designed automatically operate as the primary bilge system in the engine room spaces. We need to consider about the mixed of oil and water in the engine room. We can not sent the water out if that has an oil, according to Marine Pollution statutory. And then we need a Oily Water Separator (OWS). Where, its function is to separate the water from oil content up to 15 ppm. In OWS it has an oily content monitor to control the content of oil in the water. If the content of oil in the water less than 15 ppm, we can sent the water out thorugh the overboard, if more than 15 ppm, the OWS system will sent the mixed to the sludge tank to have a circulating again, and the oil that sent to the sludge tank will be sent to the shore.
The purpose of this document is to design the bilge system in the engine room with oily water separator (OWS) system.
m3/h
Page 8 of 30
Qapacity = 1800 m3/h
Head = 150 m
Frequency = 60 Hz
Power = 125 kW
Project : DESIGN IV
Doc. No : 12 - 42 09 050 - BG
Rev.No : 02
Type : Philosopy
4.2 Main Engine
1. BHP = 6320 kW
2. SFOC = 173 gr/kWh
= 0.991
4. Time 1 trip = 4 days
5 DESIGN REQUIREMENT
5.1 PUMP
- Oily Bilge Pump
i. head static
ii. head pressure (the pressure in the suction and discharge has the same value)
iii. head velocity (the velocity in the suction and discharge has the same value)
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
3. ρ HFO ton/m3
cst in 50oC n/106
m2/s
l*L*v2/(D*2g)
m3/h
Accroding to ANEX I MARPOL 73/78 chapter II Regulation 17, the sludge tank capacity can be calculated by the following formula below:
This is the simple rotary positive displacement pumps. It consist of two meshed gears rotating in a closely fitted casing. Fluid is pumped around the outer periphery by being trapped in the tooth spaces. It does not travel back on the meshed part, since the teeth mesh closely in the centre. The example will be given by Figure 1.1 Gear Pump below.
Page 9 of 30
Figure 1.1 Gear Pump
Project : DESIGN IV
Doc. No : 12 - 42 09 050 - BG
Rev.No : 02
Type : Philosopy
5.2 Valve and Fitting
a. Type
In oily-water bilge system will be used valve and fitting such as;
1. Butterfly Valve
Figure 5.3 Butterfly Valve
2. Remotely Butterfly Valve
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk, which allows for quick shut off. Butterfly valve are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. Used for stop valve only, for low working pressure. In this system, butterfly valve used in order before the pump, and as a connecting to another equipment to make a standby function. Below is the example of butterfly valve, shown in Figure 5.3 Butterfly Valve.
Remotely Butterfly Valve has the same function with butterfly valve but in this valve has remote as an automation control. It can be controled from another place to make it work automatic. This valve need another system in automation and cost especialy. In this system, remotely butterfly valve used in stripping system in each cargo oil tank. Because the hard acces situation and then need an automation system according to the safety conditon.
Remotely Butterfly Valve has the same function with butterfly valve but in this valve has remote as an automation control. It can be controled from another place to make it work automatic. This valve need another system in automation and cost especialy. In this system, remotely butterfly valve used in stripping system in each cargo oil tank. Because the hard acces situation and then need an automation system according to the safety conditon.
Has same function with globe valve, working in very high pressure and just has one-way direction. Usually this valve is used in order after the pump and another lines that the fluids shall not back through the same line or just one-way direction.
Hyraulic filters are very useful for removing solid contamination from lube and fuel oil system of marine machinery. Withous filters in the lube or fuel oil system, the machinery internal parts, bearing, piston, rings, liners etc. can get damaged, which will result in inefficient working of the machinery. In this system will be used Centrifugal Filter. These filters work on the principal of centrifugal force removing high density fluids and impurity from the oil. It is normally used for lube oil systems. Most of the auxiliary engines have attaced centrifugal filters. The example will be shown in Figure 5.4 Centrifugal Filter below.
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
Bilge suction are to be arranged as not to impede the cleaning of bilges and bilge well. They are to be fitted with easily detachable, corrosion resistant strums. Emergency bilge suction are to be arranged such that they are accesible, with free flow and at suitable distance from the tank top or the ship's bottom. For the size and design of bilge well, will refer to GL Rules for Hull Structure (I-1-1), Section 8, B.5.3. Bilge wells shall have a capacity of more than 0,2 m³.Small holds may have smaller bilge wells. For the use of manhole covers or hinged covers for the access to the bilge suctions, see Chapter 2 – Machinery Installations, Section 11.
Valves in connecting pipes between the bilge and the seawater and ballast water system, as well as between the bilge connections of different compartments, are to be so arranged that even in the event of faulty operation or intermediate positions of the valves, penetration of seawater through the bilge system will be safely prevented. Bilge discharge pipes are to be fitted with shut-off valves at the ship's shell. Bilge valves are to be arranged so as to be always accessible irrespective of the ballast and loading condition of the ship.
A screw-down non-return valve or a combination of a non-return valve without positive meansof closing and a shut-off valve are recognized as reverse flow protection.
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
m3
m3
m3
m3/h
Page 12 of 30
: DESIGN IV
: 12 - 42 09 050 - BG
: 02
: Philosopy
In this document, we will design a bilge system in the engine room. In the engine room, we will find an leakage of oil that became from any machinery and pipe. Therefore, the oily bilge system is designed automatically operate as the primary bilge system in the engine room spaces. We need to consider about the mixed of oil and water in the engine room. We can not sent the water out if that has an oil, according to Marine Pollution statutory. And then we need a Oily Water Separator (OWS). Where, its function is to separate the water from oil content up to 15 ppm. In OWS it has an oily content monitor to control the content of oil in the water. If the content of oil in the water less than 15 ppm, we can sent the water out thorugh the overboard, if more than 15 ppm, the OWS system will sent the mixed to the sludge tank to have a circulating again, and the oil that sent to the sludge tank will be sent to the shore.
The purpose of this document is to design the bilge system in the engine room with oily water separator
Page 13 of 30
: DESIGN IV
: 12 - 42 09 050 - BG
: 02
: Philosopy
(the pressure in the suction and discharge has the same value)
(the velocity in the suction and discharge has the same value)
Accroding to ANEX I MARPOL 73/78 chapter II Regulation 17, the sludge tank capacity can be calculated
This is the simple rotary positive displacement pumps. It consist of two meshed gears rotating in a closely fitted casing. Fluid is pumped around the outer periphery by being trapped in the tooth spaces. It does not travel back on the meshed part, since the teeth mesh closely in the centre. The example will be given by
Page 14 of 30
: DESIGN IV
: 12 - 42 09 050 - BG
: 02
: Philosopy
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk, which allows for quick shut off. Butterfly valve are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. Used for stop valve only, for low working pressure. In this system, butterfly valve used in order before the pump, and as a connecting to another equipment to make a standby function. Below is the example of butterfly valve, shown in Figure
Remotely Butterfly Valve has the same function with butterfly valve but in this valve has remote as an automation control. It can be controled from another place to make it work automatic. This valve need another system in automation and cost especialy. In this system, remotely butterfly valve used in stripping system in each cargo oil tank. Because the hard acces situation and then need an automation system according to the safety conditon.
Remotely Butterfly Valve has the same function with butterfly valve but in this valve has remote as an automation control. It can be controled from another place to make it work automatic. This valve need another system in automation and cost especialy. In this system, remotely butterfly valve used in stripping system in each cargo oil tank. Because the hard acces situation and then need an automation system according to the safety conditon.
Has same function with globe valve, working in very high pressure and just has one-way direction. Usually this valve is used in order after the pump and another lines that the fluids
Hyraulic filters are very useful for removing solid contamination from lube and fuel oil system of marine machinery. Withous filters in the lube or fuel oil system, the machinery internal parts, bearing, piston, rings, liners etc. can get damaged, which will result in inefficient working of the machinery. In this system will be used Centrifugal Filter. These filters work on the principal of centrifugal force removing high density fluids and impurity from the oil. It is normally used for lube oil systems. Most of the auxiliary engines have attaced centrifugal filters. The example will
Bilge suction are to be arranged as not to impede the cleaning of bilges and bilge well. They are to be fitted with easily detachable, corrosion resistant strums. Emergency bilge suction are to be arranged such that they are accesible, with free flow and at suitable distance from the tank top or the ship's bottom. For the size and design of bilge well, will refer to GL Rules for Hull Structure (I-1-1), Section 8, B.5.3. Bilge wells shall have a capacity of more than 0,2 m³.Small holds may have smaller bilge wells. For the use of manhole covers or hinged covers for the access to the bilge
Valves in connecting pipes between the bilge and the seawater and ballast water system, as well as between the bilge connections of different compartments, are to be so arranged that even in the event of faulty operation or intermediate positions of the valves, penetration of seawater through the bilge system will be safely prevented. Bilge discharge pipes are to be fitted with shut-off valves at the ship's shell. Bilge valves are to be arranged so as to be always accessible irrespective of the
A screw-down non-return valve or a combination of a non-return valve without positive meansof closing and a shut-off valve are recognized as reverse flow protection.
DESAIN-IV: MACHINERY BASIC DESIGN
ATTACHMENT NO. 01
CALCULATION
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
DESAIN-IV: MACHINERY BASIC DESIGN
ATTACHMENT NO. 01
CALCULATION
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
Page 21 of 30
Project : DESIGN IV
Doc. No : 12 - 42 09 050 - BG
Rev.No : 01
Type : Attachment No. 01
1. Oily Bilge Pump
i. head static = 9.55 m
ii. head pressure = 0 m (the pressure in the suction and discharge has the same value)
iii. head velocity = 0 m (the velocity in the suction and discharge has the same value)
TECHNICAL SPECIFICATION OF OILY WATER SEPARATOR (OWS) SYSTEM
cst in 50oC n/106
m2/s
For the frictional losses (l) will be determned if the value of reynold number <2300 will be used formula Re/64, and if not the following formula is 0.02+0.0005/D