Closed-loop pipework system deaeration apparatus

摘要

De-aeration apparatus 500 with a water inlet 102 to an expansion pipework 106 receiving water from a closed-loop pipework system, the diameter of the outlet end 110 being larger than the inlet end. The outlet end opens below a normal operating level in a water tank 104 open to the atmosphere. The diameter of the outlet end section may increase towards the outlet end which may be dome-shaped. The tank may contain Raschig rings 202 and/or mesh to disrupt flow. The tank may have a partition to define an inlet area, the partition having a number of apertures which may be below the normal operating level and above the pipework outlet. There may be a flow-limiter 502 and pump 520 which are configured to maintain the level in the tank, potentially using a controller 530 and two level sensors 510,512. A heat exchanger connected to the closed-loop pipework system is also claimed.