LEVEL CONTROL IN AN EVAPORATOR

摘要

A heating, ventilation and air-conditioning (HVAC) a falling film evaporator in flow communication with a condenser. The falling film evaporator includes a separator to separate vapor from liquid refrigerant and a plurality of evaporator tubes through which a volume of thermal energy transfer medium is flowed. A distribution system is operably connected to the separator to distribute a flow of liquid refrigerant over the plurality of evaporator tubes. A primary feed conduit delivers a flow of refrigerant to the separator, and at least one secondary feed conduit is in flow communication with the primary feed conduit. At least one auxiliary valve is located at the secondary feed conduit to regulate flow into the separator from the primary feed conduit. At least one sensor senses a level of a refrigerant pool in the evaporator. The sensor is operably connected to the at least one auxiliary valve to control operation thereof.

主权项

1. A heating, ventilation and air conditioning (HVAC) system comprising:
a condenser flowing a flow of refrigerant therethrough; a falling film evaporator in flow communication with the condenser including: a plurality of evaporator tubes through which a volume of thermal energy transfer medium is flowed; a distribution system to distribute a flow of liquid refrigerant over the plurality of evaporator tubes; and a primary feed conduit to deliver a flow of refrigerant to the evaporator; at least one secondary feed conduit in flow communication with the primary feed conduit; at least one auxiliary valve disposed at the secondary feed conduit to regulate flow into the evaporator from the primary feed conduit; and at least one sensor to sense a level of a refrigerant pool in the evaporator, the sensor operably connected to the at least one auxiliary valve to control operation thereof.