High Efficiency Evaporator MEP: Multi-Effect Plate evaporator The Alfa Laval Multi-Effect Plate (MEP) evaporator is used, among other places, on cruise vessels and at diesel power plants to produce the highest quality fresh water at the lowest possible overall production costs. The MEP system shown here has three effects and an integrated shell & tube condenser. Application Supplying high quality fresh water to meet the demands onboard the fleets of the world and at diesel power plants is a challenge that must be addressed in order to support sustain­ ble development. To meet the growing demand for a potable and technical water, it is important to be able to provide­economical and efficient desalination technologies. the use of an optimized pump configuration and the application of frequency controlled motor on the sea water pump. MEP system from Alfa Laval The Alfa Laval MEP system is an easy-to-use fresh water distiller that uses seawater to produce the highest quality distillate­with a conductivity of less than 20 µS/cm at the lowest­possible overall production cost. With its modular design, this highly reliable MEP evaporator­ is easy to configure to the requirements of any vessel, diesel­ power plant. Straightforward operation and automated control­ provides maximum uptime at less cost compared to techno­ logies such as reverse osmosis (RO) and multi-stage flash (MSF). Its lightweight, space-saving design takes up less floor space while offering much higher thermal efficiency in relation­ to its volume and weight compared to other evaporators­ . This enables the production of much higher volumes of fresh water than other desalination technologies. Economical and highly efficient, the MEP employs combined plate-type evaporator/condenser effects to produce fresh water using the available waste heat from hot water or low-pressure steam, or a combination of both. The self-contained automated MEP evaporator is designed with very high thermal efficiency for high production rates using very little waste heat. Furthermore, the electric energy consumption is kept to a minimum through The MEP system offers the lowest possible consumption of both electric energy and chemicals. The electric energy consump­ion of the four-effect MEP-4-750 desalination unit, t for example, is less than 2.5 kWh/m³. Moreover, the MEP does not require brine circulation or any anti-foam injection, and its total anti-scale chemical consumption is less than traditional­multi-stage

Alfa Laval MEP in brief • Low water production cost • State-of-the-art and user-friendly control technology • Fast start-up and quick response to load changes • Corrosion-resistant titanium plates • Patented plate design and thin film process for high thermal efficiency • Unique construction that allows direct access to heating surfaces • Evaporator vessel of AISI 316L steel • High distillate purity and salinity of 5–10 ppm (10–20 µS/cm) • Capacity range: 180–1000 m3/24 h per unit The Alfa Laval MEP for cruise liners shown here has six effects and shell & tube condenser parallel to the evaporator...

Should calcium carbonate scaling occur, it is easily removed by chemical cleaning with a non-toxic solution using Cleaning-in-Place (CIP) equipment. In the unlikely event of calcium sulphate scaling, which usually results from incorrect operation of the unit, disassembly of the plate pack can be carried out, allowing the scale to fall to the bottom of the desalination vessel. This enables the unit to be brought back online at rated capacity with minimal downtime. This is not possible with a tubular system. Full access to heating surfaces Simply open the MEP access doors to inspect and/or clean...

Vessel diameter Length Width Height Service space should be decided depending on machine room layout. Capacity range Vessel diameter Capacity range1 * Upon request, Alfa Laval can also supply MEP systems with capacities up to 7000 m3/24h based on larger plates and vessels. The MEP system can supply between 180 and 1000 cubic meters of fresh water a day, depending on the unit employed. This means that ship owners and operators need to bunker less fresh water when at port. Based on standard components and a modular concept, each unit is custom-designed. Diesel plant installations, including...