Temperature control of exhaust gas of a transportation refrigeration unit
AssigneeCarrier Corporation
InventorMichael Swab
Life of this patent
Estimating the term…
Abstract
A transportation refrigeration unit includes an evaporator circulating a flow of refrigerant therethrough to cool a flow of supply air flowing over the evaporator, a compressor in fluid communication with the evaporator to compress the flow of refrigerant, and an engine operably connected to the compressor to drive operation of the compressor. The engine includes an exhaust pathway to direct an exhaust gas flow from the transportation refrigeration unit, and a nozzle extending circumferentially around the exhaust pathway defining a nozzle flowpath between the exhaust pathway and the nozzle, the nozzle configured to flow a cooling airflow along the nozzle flowpath to reduce a temperature of the exhaust gas flow.
Claims15
A transportation refrigeration unit comprising:
- an evaporator circulating a flow of refrigerant therethrough to cool a flow of supply air flowing over the evaporator;
- a compressor in fluid communication with the evaporator to compress the flow of refrigerant;
- an engine operably connected to the compressor to drive operation of the compressor, the engine including:
- an exhaust pathway to direct an exhaust gas flow from the transportation refrigeration unit;
- a nozzle extending circumferentially around the exhaust pathway defining a nozzle flowpath between the exhaust pathway and the nozzle, the nozzle configured to flow a cooling airflow along the nozzle flowpath to reduce a temperature of the exhaust gas flow;
- and
- a condenser fan configured to direct the cooling airflow from a condenser of the transportation refrigeration unit into the nozzle flowpath.
A method of operating a transportation refrigeration unit comprising:
- operating a compressor to compress a flow of refrigerant in the transportation refrigeration unit;
- operating an engine operably connected to the compressor to drive the compressor;
- directing a flow of exhaust gas away from the engine via an exhaust pathway;
- and
- flowing a cooling airflow through a nozzle flowpath defined between the exhaust pathway and a nozzle disposed circumferentially around the exhaust pathway, thereby reducing a temperature of the flow of exhaust gas exiting the exhaust pathway;
- wherein a condenser fan is configured to direct the cooling airflow from a condenser of the transportation refrigeration unit into the nozzle flowpath.
Dependencies are inferred from the claim text.