Fresh Water Generator PPT

AUXILIARY MACHINERY 1 FRESHWATER GENERATOR (FWG) PRINCIPLES

LEARNING OBJECTIVES At the end of this lesson, you should be able to; Define what is Freshwater Generator (FWG), Understand the distillation process, Enumerate the different types of Freshwater Generator, Identify the parts of a Freshwater Generator.

WHAT IS FRESHWATER GENERATOR?

A

type of evaporator that converts sea water into drinkable freshwater.

HOW IT IS BEING DONE?



Sea water is evaporated using a heat source, separating pure water from salt, sediment and other elements.

WHAT IS SEA WATER OR SALT WATER?



Water from a sea or ocean which has a salinity of about 3.5% ( 35g of dissolved salt per kg of seawater).

WHAT IS SALINITY?



Is the saltiness or dissolved salt content of a body of water.

WHAT IS A BRINE?



Is a solution of salt in water.

TYPES OF FRESHWATER GENERATOR

Plate type 2. Shell and tube type 1.

PLATE TYPE

PLATE TYPE Parts Name 1. Seawater feed 2. Heating medium in 3. Heating medium out 4. Seawater cooling in 5. Seawater cooling out 6. Freshwater out 7. Evaporated steam 8. Demister 9. Condenser 10. Evaporator 11. Brine out

SHELL AND TUBE TYPE

SHELL & TUBE TYPE

EXAMPLE:

FWG PARAMETERS

QUESTION 1. 2. 3.

What is Freshwater Generator? What are the two types of Freshwater Generator ? Identify the parts of a plate type FWG.

NEXT TOPIC:

OPERATION AND MAINTENANCE OF FWG

OBJECTIVES

After this lesson, you should be able to; Explain the operation of a freshwater Generator,  Describe the treatment necessary for water produced by evaporators for human consumption,  Explain on the methods of preventive maintenance of a Freshwater 