Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format. National Examinations, December 2014 — 07-Mec-B3 Energy Conversion and Power Generation. Three hours, closed book. Section A is calculative (Questions 1–4) and Section B is descriptive (Questions 5–6); a candidate answers three from Section A and one from Section B, four questions of 15 marks each constituting a complete 60-mark paper. Reference data for particular questions are bound in as attachment pages 9–13, reference formulae and constants as pages 14–17, and the Granet & Bluestein steam tables as pages 18–35. All six questions are solved here, because the set is a study resource rather than a three-hour sitting.
Reference texts. I. Granet and M. Bluestein, Thermodynamics and Heat Power, 6th ed. (the steam tables bound into this paper) · M. M. El-Wakil, Powerplant Technology (station heat balances, condensers, feedwater heating, nuclear and renewable plant) · Y. A. Çengel and M. A. Boles, Thermodynamics: An Engineering Approach, 9th ed. (Brayton and Rankine cycle analysis) · Y. A. Çengel, Heat and Mass Transfer, 6th ed. (surface-condenser and recuperator performance).
Property data. Every enthalpy, entropy and saturation temperature quoted below is read from the tables bound into this examination paper — General Constants on page 15 (\(c_p\) and \(c_v\) for helium, air and water), the Question 2 enthalpy table on page 10, the Koeberg condenser data sheet on page 11, the Belledune heat balance diagram on page 13, and Granet & Bluestein Tables A.1–A.4 on pages 19–35. Where a table entry has to be interpolated the interpolation is shown.
