ΕΛΛΗΝΙΚΗ ΔΗΜΟΚΡΑΤΙΑ Ανώτατο Εκπαιδευτικό Ίδρυμα Πειραιά Τεχνολογικού Τομέα Ξενόγλωσση Τεχνική Ορολογία Ενότητα: Boiler operation Παναγιώτης Τσατσαρός Τμήμα Μηχανολόγων Μηχανικών ΤΕ
Άδειες Χρήσης Το παρόν εκπαιδευτικό υλικό υπόκειται σε άδειες χρήσης Creative Commons. Για εκπαιδευτικό υλικό, όπως εικόνες, που υπόκειται σε άλλου τύπου άδειας χρήσης, η άδεια χρήσης αναφέρεται ρητώς. Χρηματοδότηση Το παρόν εκπαιδευτικό υλικό έχει αναπτυχθεί στα πλαίσια του εκπαιδευτικού έργου του διδάσκοντα. Το έργο «Ανοικτά Ακαδημαϊκά Μαθήματα στο Ανώτατο Εκπαιδευτικό Ίδρυμα Πειραιά Τεχνολογικού Τομέα» έχει χρηματοδοτήσει μόνο την αναδιαμόρφωση του εκπαιδευτικού υλικού. Το έργο υλοποιείται στο πλαίσιο του Επιχειρησιακού Προγράμματος «Εκπαίδευση και Δια Βίου Μάθηση» και συγχρηματοδοτείται από την Ευρωπαϊκή Ένωση (Ευρωπαϊκό Κοινωνικό Ταμείο) και από εθνικούς πόρους. 2
1. Exercise A:Open Questions... 4 2. Exercise B:Sentence Completion... 5 3. Exersice C:Checking facts and Ideas... 6 4. Exercise D: Matching Terms and Definitions... 7 3
1. Exercise A:Open Questions Answer the questions 1. What is referred to as "burner matching"?... 2. What are the main functions of a steam boiler?... 3. What is feedwater?... 4. What should water treatment aim at?... 5. What are the effects of the production of scale or deposits on boiler surface?... 6. What happens if the metal heat transfer surface is insufficiently cooled?... 7. What may scale be formed of?... 8. Under what circumstances may foam be formed?... 9. What problems may the presence of foam cause?... 10. How may a low level of oxygen content in the feedwater be established?... 4
2. Exercise B:Sentence Completion Finish up the incomplete sentences with information from the text: 1. In order to formulate the requirements and the recommendations of the boiler operation we must:.. 2. We should consider all limitations on furnace heat input in order to guarantee.. 3. Efficient operation and avoidance of damage to heat transfer surfaces can be achieved by. 4. Particular attention should be drawn to the effects of poor fuel or air mixing since these. 5. A systematic maintenance program aims at.. 6. The boiler cannot carry out its functions effectively unless. 7. If we wish to be consistent with the objectives of water treatment, we should 8. Water treatment to prevent corrosion should so adjust the quality of the water as to 9. Deposits can be produced by... 10. Deposits not only but also. 11. Shielding the underlying metal of the boiler from protective conditions in the water systems results in... 12. Scale must be detected and removed so as not to.. 5
3. Exersice C:Checking facts and Ideas Cheek if the following statements are True or False. Refer to the text to justify your answers. 1. The factor of heat input in the boiler operation is not of great importance to the boiler itself. 2. Since combustion quality is crucial, particular attention should be paid to it at least at the beginning of the cycle of life of the boiler. 3. Poor fuel and air mixing are causing dioxides released in atmosphere, thus polluting the atmosphere. 4. Water treatment is closely related to steam in several different ways. 5. A film of iron oxide created upon the surface of steel ensures the necessary protection for the boiler. 6. The simple refill of the boiler with fully treated or demineralized water is the prerequisite for its satisfying operation. 7. According to the text, the process of filling the system should be carried out following strict specifications and figures. 8. The operation of a closed hot water system such as the boiler is discourages any leakage... 6
4. Exercise D: Matching Terms and Definitions Match the technical terms from the text with their corresponding definitions: α/α Question Answer 1 Combustion a. a device wherein heat is released, then directly or indirectly transferred to a solid or liquid mass in order to influence a chemical or physical procedure taking place 2 Foaming b. the damage that happens to an object in normal and ordinary use during a time period 3 Corrosion c. to cause extended stains or block operation due to wear 4 Furnace tube d. deposits on internal surfaces caused by salts 5 Conductivity e. the burning process of a fuel releasing energy, carbon, monoxides and dioxides 6 Compound f. fixing in position for use 7 Impurities g. the deterioration of metal by chemical action 8 Scale h. entering or escaping accidentally 9 Installation i. consisting of two or more different elements 10 Foul j. bubbling caused by excessive alkalinity or the presence of oil on the water surface 11 Wear k. the property of transmitting heat, electricity, etc. 12 Leakage l. elements mixed with foreign matter 7