Thermal System for a Marine Vessel, Such System Installed in a Marine Vessel, a Marine Vessel Comprising the Thermal System, a Method of Controlling a Thermal System, and a Control Device

A thermal system for a marine vessel, comprising:

• a thermal liquid circuit;
• a pump system for circulating a thermal liquid in the thermal liquid circuit;
• a number of thermal consumers, said thermal consumers being arranged in parallel in said thermal liquid circuit, and said thermal consumers being arranged in series with respective Pressure Independent Control Valves (PICVs);
• a control device for controlling the pump system;
• and
• a differential pressure sensor adapted to sense a differential pressure indicative for the differential pressure over a critical one of said Pressure Independent Control Valves, whereby a signal from said differential pressure sensor is used by the control device as basis for controlling the pump system,
• whereby the differential pressure over the Pressure Independent Control Valve is at least approximated on basis of the signal from the differential pressure sensor.

A thermal system for a marine vessel, comprising:

• a thermal liquid circuit;
• a pump system for circulating a thermal liquid in the thermal liquid circuit;
• a number of thermal consumers, said thermal consumers being arranged in parallel in said thermal liquid circuit, and said thermal consumers being arranged in series with respective Pressure Independent Control Valves (PICVs);
• a control device for controlling the pump system;
• and
• a differential pressure sensor adapted to sense a differential pressure indicative for the differential pressure over a critical one of said Pressure Independent Control Valves, whereby a signal from said differential pressure sensor is used by the control device as basis for controlling the pump system,
• whereby the pump system is adjusted to provide a specific differential pressure across the critical Pressure Independent Control Valves as indicated by the differential pressure sensor.