DNV approves Wärtsilä’s ammonia release mitigation system

Wärtsilä has received approval in principle (AiP) from classification society DNV for Wärtsilä Ammonia Release Mitigation Systems (WARMS).

The approval in principle covers its use on ships fuelled by ammonia with the DNV Class notation gas fuelled ammonia or on gas tankers fuelled by ammonia with the DNV Class notation GF NH3.

WARMS is designed for accurate and continuous monitoring of emissions. It features staged and controlled combustion, minimal energy consumption and waste, and a compact footprint. WARMS offers a green and safe alternative to venting pure ammonia, diluting it with air, or bubbling it in hazardous dirty water tanks.

The technology mitigates the risks associated with future fuels, such as ammonia, which can be hazardous to both health and the environment unless handled and stored with great care.

According to the company, with WARMS, typical emissions comprise nitrogen (N2) and water (H2O), with ammonia (NH3) emissions less than 30 ppm. In fact, in most cases NH3 emissions are close to 0 ppm.