RANKINE CYCLE MID-TEMPERATURE RECUPERATION
A system and method for recuperation is provided including a boiler wherein air and exhaust gas recirculation pass through the boiler and are cooled by thermal transfer with a coolant. The system includes an expander receiving coolant from the boiler, a recuperator receiving coolant from the expander, a condenser receiving coolant from the recuperator; a pump pumping coolant from the condenser to a low temperature portion of the boiler, and a valve, which allows coolant to pass directly from the boiler to the recuperator.
1 . A recuperation system including:
a boiler, wherein air and exhaust gas recirculation pass through the boiler and are cooled by thermal transfer with a coolant;
an expander receiving coolant from the boiler;
a recuperator receiving coolant from the expander;
a condenser receiving coolant from the recuperator;
a pump pumping coolant from the condenser to a low temperature portion of the boiler; and
a valve, wherein the valve allows coolant to pass directly from the boiler to the recuperator.
2 . The system of claim 1 wherein the valve is a three-way valve.
3 . The system of claim 1 further including a temperature sensor detecting the temperature at the intake manifold.
4 . The system of claim 3 further including a valve control controlling the valve.
5 . The system of claim 4 wherein the valve control receives an indication of the temperature at the intake manifold from the temperature sensor.
6 . The system of claim 5 wherein the valve control adjusts the position of the valve in response to the temperature at the intake manifold.
7 . A recuperation method including:
cooling air and exhaust gas recirculation passing through a boiler by thermal transfer with a coolant;
receiving the coolant from the boiler at an expander;
receiving the coolant from the expander at a recuperator;
receiving the coolant from the recuperator at a condenser;
pumping coolant from the condenser to a low temperature portion of the boiler; and
actuating a valve to allow coolant to pass directly from the boiler to the recuperator.
8 . The method of claim 7 wherein the valve is a three-way valve.
9 . The method of claim 7 further including detecting the temperature at the intake manifold using a temperature sensor.
10 . The method of claim 9 further including controlling the valve using a valve control.
11 . The method of claim 10 wherein the valve control receives an indication of the temperature at the intake manifold from the temperature sensor.
12 . The method of claim 11 wherein the valve control adjusts the position of the valve in response to the temperature at the intake manifold.