MILAN (Reuters) -Enel’s core earnings rose 6.7% last year lifted by a one-off capital gain and stronger green energy business in North America and Brazil to beat expectations and meet guidance. In preliminary results, Europe’s biggest utility said its ordinary earnings before interest, tax, depreciation and amortisation (EBITDA) were 19.2 billion euros ($22 billion)compared to a Refinitiv estimate of 18.5 billion euros. The result was also at the top end of the 18.7-19.3 billion euro range the group set last year in guidance. Enel, which last year made a capital gain of 1.763 billion euros on …