Читать книгу Introduction to Desalination - Fuad Nesf Alasfour - Страница 27

An adiabatic heat exchanger provides thermal load to feed seawater, such that feed seawater can be supplied to MEE desalination system at 70 °C.

Steam stream: 1 kg/s, 120 °C

 State 1: saturated vapor

 State 2: saturated liquid

Feed seawater stream:

 State 3: 20 °C

 State 4: 70 °C

x_f = 40 000 ppm

Find:

1 Feed seawater flow rate.

2 Assume feed is fresh water, find feed flow rate.

3 If steam (thermal load) is generated by conventional boiler using natural gas as a fuel, find fuel flow rate and emitted amount of CO2.

4 Provide emission table for three types of fuels to generate steam (thermal load).