Design of Catamaran Propulsion System with Demihull Distance Variation on Hospital Ship

Various problems faced by health services in the area of remote islands based on survey data Ministry of Health, that limited human resources in health and treatment facilities, as well as the difficult geographical conditions causing problems transport and communication are the main problem. From the above, the problems faced by means of a mobile hospital in the form of vessels operating from one small island to another small island is the solution of health problems for the people living within the island of Madura In this thesis the work will be done planning catamaran ship propulsion system with a variety of distances and determine the power demihull hospital equipmen. From the calculation results in a variation within demihull get with B = 19.51 m, 0,1B = 21.46, 0,2B = 23.41, 25.36 resulting 0,3B = 97.8 kN after the engine power of 812.71 kW obtained. From the selection of the engine 10 criteria obtained type Caterpillar 3508B engines. Power generators are required for a hospital ship is 75kW for 4 gensets.


I. INTRODUCTION 1
Accordi ng to survey done by Ministry of Health, there are various problems faced by health services in the isolated area.The first problem is the limited human resources in health and treatment facilities.Thus, the difficult geographical conditions lead to transportation and communication problems.
From the problems mentioned, a hospital mobile in the form of operating vessels from one island to another small island is the solution of health problems for people living in the Madura island.
The aims of this paper are to plan catamaran propulsion system with demihull distance varieties and determine the power of hospital equipment.

II. LITERATURE REVIEW
Catamaran is a type of vessel which has two hull (demihulls) connected by a construction so that it becomes a unity as a single ship.Catamaran type can be divided based on the shape of the hull under water [2] -Asymmetric Catamaran -Symmetrical Catamaran -Wave Piercing Catamaran 1. Twinhull ship model which both sides are symmetrical stream line (Model B) It is ssumed as two monohull vessels in which both hulls are associated with a certain distance.Then, the Amiadji, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, Email: amiadji@yahoo.comAgoes Santoso, Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, Email : agoes@its.ac.idBondan Al Akbar Sabastian, Departmen of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia, Email : bondan.alakbar25@gmail.comsystem will have the same wave with a stream line shape of the vessel.Around the submerged ship in water, it will develop and produce movement.This system can be seen schematically in FIG.It may be divided into two kinds of wave, the diverging wave and transverse wave.Generally, both waves placed near the prow and stern of the ship then move forward along the hull [6].
2. Doublehull ship model which both sides are asymmetric, the outside line stream hull which straight in the inside.(Model D) At the end of front part is the point of spreading fluid into sideways (follow the stream line) which almost the same with the image.The difference lies in the inner side walls are straight so the flow follows the shape of the hull straight up to stern ship.When it is implemented, this form will create waves to the considerable side [7].
3. Doublehull ship model which both sides are asymmetric, the inner side is stream line and straight in outside.(Model A and C) Fluid flow is formed from the prow of the ship concentrated in the middle vessel (between two hulls) which moves into stern ship.While in the sideways, the straight flow follows the hull of outer shape until the stern as shown in picture.This model is suitable for operating vessels in rivers or places surrounded by a lot of people because the catamarans model do not cause waves to the side larger than the catamarans model which streamline as the outer.
The different between model A and C come to the deck area in each vessels [1].Ship model C has a larger deck than the ship model A. Some advantages catamaran ship as follows: 1. Have a larger deck to carry passenger, vehicles, and large quantity goods.
2. With different hull from mono hull, this has important role to reduce the resistance on the vessel so it can produce the high speed and reduce fuel consumption.

Basic Calculation Barriers
According to Rawson and Tupper (2001), the total resistance suffered by moving ship in calm water surface consists of several components, for instance wave making resistance, skin frictional resistance, viscous pressure resistance, and water resistance resistance and appendage.
Holtrop method [4] is used to calculate the displacement full vessel obstacles in any conditions in the fixed speed remaining unchanged.The formula for calculating the barriers is: R T Based on the calculation of main engine In the planning of back side engine room location, there will be 2% lossing part while the location of the engine room on a ship midship area suffered losses of 3%.It is mentioned in the book "Principal terms of Naval Architecture 131  Brake Horse Power (BHP) There is an efficiency influence of the transmission gear wheel system (ηG) International Journal of Marine Engineering Innovation and Research, Vol. 1(3), Jun. 2017. 204-212 (pISSN: 2541-5972, eISSN: 2548-1479) 206  International Journal of Marine Engineering Innovation and Research, Vol. 1(3), Jun. 2017. 204-212 (pISSN: 2541-5972, eISSN: 2548-1479  International Journal of Marine Engineering Innovation and Research, Vol. 1(3), Jun. 2017. 204-212 (pISSN: 2541-5972, eISSN: 2548-1479) f. Power of Engine g. Fuel Fueled MDO and HFO engines selected then all get the same value.
h. Maintainability This type of machine and the installation will affect the treatment affects the cost and the number of crew aboard.
i. Maintainability This type of machine and the installation will affect the treatment affects the cost and the number of crew aboard.j.Reliability The more stuff there is getting cheaper conversely the few goods that the market will be more expensive because hard to find.Innovation and Research, Vol. 1(3), Jun. 2017. 204-212 (pISSN: 2541-5972, eISSN: 2548-1479 International Journal of Marine Engineering Innovation and Research, Vol. 1(3), Jun. 2017. 204-212 (pISSN: 2541-5972, eISSN: 2548-1479) 212 The floating hospital ship model is obtained with these lenght in 65,00 metres, beam in 21,46 metres, max draught in 3,5 metres, speed in 14 Knots and route from Raas to Kangean Island.

International Journal of Marine Engineering
This hospital ship has emergency and hospitality facilities services, surgery specialist, obstetricians and children's specialist with the total of patient's bed is 30 people.

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Effective Power or EHP is the power required to drive the boat in the water or to pull the boat with a speed v. Calculation of the effective power vessel.EHP = Rtdinas × Vs = 113,05 × 7,202 = 814,18 kW  Calculate Power on the stern tube Propeller Shafts DHP = EHP/ PC, PC = ηH x ηrr x ηo.Values t can be sought from the value w which known as that t = k.wk values between 0.7-0.9 and taken the value of k = 0.8= 0The ηrr value for ships with a propeller-type twin screw is 0.95 to 1.0 In planning the propeller and shaft tube is taken ηrr = 1.0 Propulsion Efficiency (ηo) is open water efficiency which efficiency of the propeller at the time of open water test.The amount is between 40-70%, and taken 55%.on the propeller shaft tube is calculated from the ratio between the effective power and the propulsive coefficient: DHP = EHP/PC = 1404,9 kW = 1910,2 HP  Calculate Power On Propeller Shaft SHP = DHP/ηs ηb = 1949,18 HP = 1453,5 kW  Calculate Prime Mover Power Required  BHPscrThe influence the efficiency of the transmission gear wheel system (ηG), on this assignment system uses a single reduction gear or single reduction gears with a loss of 2% for the forward direction so ηG = 98%.BHPscr = SHP/ηG = 1988,96 HP = 1483,2 kW  BHPmcr Power is obtained when the engine is maximum.The value of the engine when the engine is taken from the state service margin between 80% -85%.Therefore BHPmcr obtained in the following manner

Figure
Figure. 9.The Katalog

Figure
Figure.11.General arrangement Hardware General HospitalA completion of a required public hospital is a hospital medical equipment.Medical devices will be the means of service in public hospitals to provide action to the patient, care, and treatment.Generally, if it is seen from government regulation of medical devices, there are devices which are goods, apparatus, or instrument with each component of the array of parts produced and sold for maintenance, treatment, diagnosis, prevention, mitigation, and recovery for any symptoms of disorders of health that occur in the Alat bantu jalan Then 10 criterias of assessment resulting Caterpillar engines (3508B) which meets the requirements Propeller Selection.