DongHwa Entec

The Oil-tanker is designed for the bulk transportation of crude oil or petro-chemical products, and broadly there are two types of tankers, Product carrier and Crude oil carrier. In case of Product Carrier, every compartment shall be cleaned because different kinds of consignments are being stored in, otherwise they could contaminate each other. The remaining oil and oil sludge inside of oil tanker also shall be removed after unloading, because other kinds of oil might be stored in. For this work, S.W or F.W is needed to be heated above 70 ~ 80 ℃, by using Tank Cleaning Heater. http://ift.tt/2kAuk2A from www.dh.co.kr

Plate Type Heat Exchanger Plate Cooler is a typical heat-exchanger that uses wrinkled-thin metal plates to transfer heat between two fluids. Large commercial version uses gaskets between the metal plates, and this cooler can exchange large amount of heat in short period of time. Since the wrinkled heat transfer plate easily creates turbulence flow at low Reynolds number, the heat transfer co-efficient between two fluids is greater than 2~4 times than typical Tubular type heat-Exchanger, and its counter flow can also increase the heat-exchange rate. Moreover, the Plate Type Heat Exchanger is an ideal heat-exchanger because the temperature approach in a plate cooler may be as low as 1°C whereas tubular type requires an approach of 4°C or more. Therefore, it is enough to cool down main engine, generator engine and other auxiliary machines of the ship. Working Principle Gasket is attached to the heat plate which forms flow channel and acts seal up

Oil Heater is used to heat a fuel oil and lubricant oil for ships by using the steam generated from boiler. There are several type of oil heaters in the market: M/E & G/E F.O. Heater breaks the viscosity of fuel oil, while increase inflammable point; H.F.O. Purifier Heater breaks the viscosity of fuel oil of heavy fuel oil, and also increases oil temperature up to the degree which helps purification process. ; and L.O. Purifier Heater increases oil temperature up to the degree which helps purification of lubricant oil used in engine. http://ift.tt/2kAw5N7 from www.dh.co.kr

Since its foundation in 1980, DongHwa Entec has been successfully developed and manufactured the air cooler for both low speed and high speed engine for more than 20 years. Subsequently, DongHwa Entec has grown up into the global leader of air cooler market with taking 50% of market share. One of our products, Charged Air Cooler is used to raise temperature of compressed air which in-taken through Turbo Charger, in order to improve power and efficiency of diesel engine. And it is comprised of Fin & Tube, Tube sheet, Casting and Water Chamber. MARPOL 73/78 Annex VI , Regulation 14.Operation in Sulphur oxides (SOx) Emission Control Area, How to comply,  LOADNew and tighter fuel sulphur content regulations by the EU and the California Air Resources Board, MGO Cooling Unit for the solution is applied as follows;  Table : Fuel requirements for Ocean-Going Vessel Main Diesel Engines, Auxiliary Diesel Engines ( Including Diesel-Electric ), and Auxiliary Boilers. ht

B.O.G(Boil-off gas) is generated while LNG is being transported, and this gas is utilized as fuel in steam turbine for sailing of LNG Carrier. Therefore, water-feeding shall be maintained very strictly on LNG Carrier. Meanwhile, the general-purpose-steam is supplied from the main boiler, and utilized to operate various auxiliary components of the ship. However, if those auxiliary component are defaulted or being operated incorrectly, feed-water could be mixed with boiler water, and eventually the life-time of boiler could be shorten. In this reason, the steam for mail boiler and general-purpose-steam are separated. LNG RV/FSRU Regasfication System Sea water direct heating  Combined open/closed loop with seawater and steam heating Min. equipment Control simple Min. Energy consumption High pressure vaporizer : Shell and Tube type heat exchanger http://ift.tt/2kAzXOm from www.dh.co.kr

LNG that is being supplied from RV/FSRU(combination of LNG Tanker, Re-gasification facility and Gas unloading facility) by HP LNG Pump, is vaporized by HP Vaporizer. The seawater is utilized as a source of heat that vaporizes LNG, and also if the seawater temperature falls down, it will be heated by with Seawater Heating System. In such case, DongHwa Entec’s Seawater Heater may be used. LNG RV/FSRU Regasfication System Sea water direct heating  Combined open/closed loop with seawater and steam heating Min. equipment Control simple Min. Energy consumption High pressure vaporizer : Shell and Tube type heat exchanger http://ift.tt/2lTfsgA from www.dh.co.kr

In order to protect body of the ship from extremely cold LNG Cargo, the Glycol Water (45% Glycol Water + 55% Fresh Water) is heated up to temperature of 90°C, and then circulated through Heating Coil that installed in temporary water-board between cargos. The Glycol Water Heater is used to heat Glycol water, and Glycol system is comprised of Glycol Water Heater and Pump, Tank. http://ift.tt/2lTjE0a from www.dh.co.kr

Fuel Switch Fuel Switch is an automatic control system for bunker change process. Recently, shipbuilding trends shifts towards the intelligent ship and consideration of sailor’s convenience and also, safety system of ship is emphasized. For this reason, Fuel Switch of DongHwa Entec is designed to control temperature changes [2℃/min] that is resulted from bunker change between HFO in high temperature and MGO/MDO in ordinary temperature, with consideration of safety. Consequently, risk of damage on engine can be mitigated and convenience of sailors has increased through automatic control instead of manual valve operation. Moreover, the remote system with HMI(ECR & LOCAL) enables sailors to control under the any circumstance. Also, it provides a real-time monitoring system over the entire bunker change process. Especially, it has an advantage of composite control over the entire bunker change process, in connection with MGO cooling unit. Donghwa total solution [MGO C/U + FUEL SW

Fuel Gas Supply System System configuration Fuel Gas Supply System(FGSS) is used to supply a fuel gas to ME-GI engine. The high pressure LNG is being supplied by HP liquefied natural gas pump and then, vaporized to natural gas. Glycol Water is generally used to heat-source for vaporizing liquefied natural gas, and Glycol Heating System is accompanied including Glycol Tank and Glycol Pump. Main fuel supply system package unit for both high pressure 2 stroke engine and low pressure 4 stroke generator engines IHM(intermediate Heat Medium) Heater package unit IHM Tank Container of IHM(50% Glycol + 50% water) IHM Pump Circulate the IHM from the LNG vaporizer to the IHM heater IHM Heater Heating IHM using steam with automatic temperature control Vaporizer package unit For 2 stroke high pressure main dual fuel engine • High pressure vaporizer Vaporization of high pressure super-critical LNG to the main engine For 4 stroke low pressure generator engines • Forcing vaporizer

Fresh Water Generator Fresh Water Generator is used to desalinate seawater for the ships. There are two types fresh water generator, R/O type and Low-pressure vapor type. Low-pressure vapor type is most widely used in commercial ships because it utilizes wasted engine jacket water or steam while sailing. The engine jacket water and steam can be utilized as a heat-source, and Shell & Tube type and Plate type are available. The seawater is heated by various heat-sources under the vacuum state, and then vaporized accordingly. The vaporized seawater is desalinated in separate filtering unit before condensed, and then fresh water is produced. Meanwhile, a salinity of produced fresh water shall remain at 0~10 ppm . Fresh Water Generator is comprised of vaporizer, condenser, demister, salinometer, distillate pump, ejector and steam injector. Multi-stage Fresh Water Generator can achieve high efficiency when large amount of fresh water is required with small amount of calories due to

Energy Saving System Recently, efforts of the various aspects and regulations for sailing ships to reduce the CO2 have been established. IMO MEPC 203 (62) meeting mentioned Energy Efficiency Design Index (EEDI) for new ships and a Ship Energy Efficiency Management Plan (SEEMP) through MARPOL Annex VI Regulation, and the raising energy efficiency is becoming inevitable.In the vessel, there are many products that can enhance the energy efficiency depending on the environment conditions.Among them, ESS is a product to reduce total power consumption by controlling pump of S.W., F.W., E / R ventilation fan and cargo hold fan.Therefore, how much energy can be reduced by ESS?Surprisingly by reducing the motor RPM of 10% through the ESS, 27% of power consumption is saving.As result of this, you can significantly save fuel Oil of D/G unnecessarily consuming on the ship. http://ift.tt/2lTjCFA from www.dh.co.kr

In order to maximize operation efficiency of main engine and other components (Aux. Engine, Purifier etc) of the ship, the Electric Heater is used to electrically heat various fluids such as lubricant oil and fuel oil. Electric heater is used to increase temperature of fluid up to required degree by heating, and it consists of heating section and control panel. Generally, the fuel oil, lubricant oil, jacket water and sea water are used with Electric Heater, and Shell body type and Tank mounting type are available. Within Tank mounting type, Side type is attached to side of tank while Top mounting type is attached to top of tank. The in-taken fluid is heated by the heating section of Electric Heater, and then heated fluid is discharged. For the control of this process, two different types of control systems are available, MC type and TPR type. MC type is an on-off step control type, and it can allocate capacity as much as needed. Meanwhile, TPR type is an electric current control type

The heat generated by boiler may be used in various components of the ship, but if the remaining heat has not transformed into condensate, it may disable pump to transport fluid, and subsequently, re-use is not possible. Therefore, the remaining steam is needed to be cooled and then reused as feed-water. Drain Cooler enables reuse of dumping steam and steam generated from various auxiliary components as well as saturated water through condensation. http://ift.tt/2lTlxdb from www.dh.co.kr

Deaerator is used to remove gas (oxygen, carbon dioxide) from feed-water for preventing corrosion inside of piping and heat-exchanger. At the same time, it can be utilized to heat feed-water, and maintain stable NPSH (Net Positive Suction Head) of feed-pump. Spray & Tray type is generally used in onshore plants while Spray & Scrubber type is applied to the ships. DongHwa Entec is developing and testing Spray, Tray and Scrubber type deaerator, and distributing them to market. Moreover, research and development are still going on for further improvement of their performances. We can meet any requirement from customer, over the whole process including performance design, strength design, material procurement, manufacturing and delivery. LNGC FOR DW2205(SCRUBBER TYPE) DAEJUN INDUSTRIAL COMPLEX #3,4(STEAM CONVERTOR) LG CALTAX COGENERATION #3 ICHON TOTAL ENERGY NO. 2 MHI/CHYODA PROJECT SAMSUNG ENG./DAINONG PJT http://ift.tt/2lk1iJ2 from www.dh.co.k

With most of oil tankers, the steam is used to run a pump attached to turbine when the cargo oil is being loaded. The vacuum condenser is installed to generate back-pressure for improving turbine performance, and recollecting exhaust steam. Additionally, it can be used to recollect steam that discharged from tanker ship with inert gas system. Generally, the high efficiency ejector or vacuum pump unit is attached to vacuum condenser in order to eject non-condensable gas. http://ift.tt/2lk9GIi from www.dh.co.kr

Cargo Drain Cooler enables the re-use of feed-water by condensing saturated water which being used in LNG tanker system equipment (Condensation line of LNG vaporizer, Forcing vaporizer, Boil off/warm-up heater, etc). from www.dh.co.kr

Since its foundation in 1980, DongHwa Entec has been successfully developed and manufactured the air cooler for both low speed and high speed engine for more than 20 years. Subsequently, DongHwa Entec has grown up into the global leader of air cooler market with taking 50% of market share. One of our products, Charged Air Cooler is used to raise temperature of compressed air which in-taken through Turbo Charger, in order to improve power and efficiency of diesel engine. And it is comprised of Fin & Tube, Tube sheet, Casting and Water Chamber.    Material Tube sheet :Naval Brass, Carbon Steel Tube :Cu-Ni (ø12.0×1.0t, ø14.0×0.8t, ø14.0×1.0t,ø16.0×0.8t) Fin : Copper Standard Size for B&W Cooler Insert TYPE A B C D E F LKM-©A 1425 1307 255.5 2302 2500.5 2756 LKM-©B 1425 1307 255.5 1937 2135.5 2391 LKM-©C 1425 1307 255.5 1614 1812.5 2608 LKM-©D 1111 992 225.5 1937 2090 2316 LKM-©E 1111 992 225.5 1614 1767.5 1993 LKM-©F 1111 992 225.5 1292 1445.5 1671 LK