DENMARK: The new Danfoss Intelligent Purging System (IPS) is a standalone, self-contained purging unit designed to remove non-condensable gases from up to eight points in an industrial ammonia refrigeration system.
Non-condensable gases can have a serious impact on the operating conditions, energy efficiency, and lifetime of a system. Air is the most abundant non-condensable gas impacting industrial refrigeration systems, often entering during operation or service.
Designed to be simple to install and service, the IPS requires just one mechanical connection, one electrical power connection, and one Modbus RTU connection. A plug-and-play setup wizard is said to enable initialisation in as little as 10 minutes and minimises the risk of errors during commissioning.
Self-diagnostic capabilities coupled with communication functionality enabled by Modbus RTU, provides remote operational and alarm status. In addition, the standalone design allows for fast pump-down—often in less than 20 minutes, Danfoss claims.
The IPS enacts automatic purging based on NCG buildup. According to Danfoss, it continually monitors the differential pressure between the system refrigerant and purging refrigerant, resulting in higher efficiency, a lower concentration of residual ammonia and a reduced compressor load.
Self-diagnostics is carried out on an ongoing basis and will shut down the IPS should the need arise. Danfoss argues that having only one integration point with the main system reduces risk in the event of issues with the main system. The IPS logs data on past purging cycles which makes it easier to identify system issues.