所屬科目：輪機英文
(a) NOx formation depends on temperature as well as residence time. An important factor in NOx production during combustion is the after compression of burnt gases.
(b) When fuel and air have burned, high peak temperatures are achieved. If this burnt gases are further compressed, even higher temperatures and pressures will be reached leading to increased NOx emissions.
(c) The problem may be overcome by later injection of the fuel. This method may be the best known way to reduce the NOx emissions.
(d) Basically the delayed injection leads to lower peak pressures and therefore to less compression after combustion. Delayed injection leads to lower pressure and temperature throughout most of the combustion.
(e) Retarding injection timing also decreases the amount of fuel burnt before peak pressure, thus reducing the residence time and degree of after-compression of the first burnt gas.
(a) 封閉空間是否已徹底通風？
(b) 是否提供足夠的照明？
(c) 所有使用的裝備是否都為經批准的類型？
(d) 是否制定並瞭解緊急疏散程序？
(e) 值班的官員是否已被告知計畫進入？
(a) The Company should carry out internal safety audits on board and ashore at intervals not exceeding twelve months to verify whether safety and pollution- prevention activities comply with the safety management system.
(b) The Company should periodically evaluate the effectiveness of the safety management system in accordance with procedures established by the Company.
(c) The audits and possible corrective actions should be carried out in accordance with documented procedures.
(d) Personnel carrying out audits should be independent of the areas being audited unless this is impracticable due to the size and the nature of the Company.
(e) The management personnel responsible for the area involved should take timely corrective action on deficiencies found.
阿摩線上測驗
登入
阿摩線上測驗
登入