Читать книгу Introduction to Desalination - Fuad Nesf Alasfour - Страница 17

1 Since T1 > T2, it is clear that steam is subjected to heat loss.Since , then . Since T1 > T2, then h2 – h1 is negative, which indicate that heat transfer sign is negative, implying that heat is lost from the system (steam) to the surrounding.

2 Isobaric process.

Extra activity:

Student can perform the following:

1 Describe boiling phenomenon in MEE system.

2 Why kinetic and potential energy terms have been neglected from energy balance (first law of thermodynamics)? Explain.

3 Explain the process associated with change of water droplet phase that surrounds the exterior pipe wall. What is the type of evaporation process?

4 Based on real numbers, compare the value of h1 against h2. Explain the physical meaning of such difference.

5 Sketch T–v, P–v, and T–s diagrams showing boiling process.