A group of 93 private investors who have invested a combined €5.8 million in Exergyn, a potentially ground-breaking clean-tech start-up, have written to the company’s board and other interested parties expressing their dissatisfaction with the strategy being pursued by the company. On April 14, the investors wrote, not just to the board, but also to the investment committee of Enterprise Ireland, which owns 1.8 per cent of the company. The same group of investors also wrote to the entrepreneur Norman Crowley, the owner of Crowley Carbon, who is also a shareholder. The board of Exergyn has, in turn, responded to…