Читать книгу Introduction to Desalination - Fuad Nesf Alasfour - Страница 28

1 Energy balance (first law): of thermal load (≈11 time of steam flow rate).Alternative solutioncp is calculated at then kg) of thermal load.

2 If feed is fresh water

3 The of natural gas fuel.For CO2 emission

4 Environmental impact of burning fossil fuels.

Fuel	Calorific value (MJ/kg)	CO2 (kg/kgfuel)	CO2/energy (kg/MJ)	SO2 (kg/kgfuel)
Coal	26	2.361	0.091	0.018
Fuel oil	42	3.153	0.075	0.040
Natural gas	55	2.750	0.050	0

Extra activity:

Student can perform the following:

1 Perform parametric study to investigate the effect of on . Plot and explain.

2 Perform parametric study to investigate the effect of xf on . Plot and explain.

3 Find the values of the following thermo‐physical parameters at and (xf= 40 000 ppm); boiling point elevation (BPE), μ, v, k, hfg, cp, u, s, ρ. Explain the reason behind the differences.

4 Find the values of the following thermo‐physical parameters at under two salinities; xf = 20 000 and 40 000 ppm for; BPE, μ, v, k, hfg, cp, u, s, ρ. Explain the reason behind the differences.

5 Calculate entropy generation and irreversibility per mass of feedwater flow rate.