Fuel anti-icing and APU compartment drain combination

摘要

A heat exchanger has a first passage to be connected to a source of fuel. The heat exchanger has an outlet to communicate the fuel downstream. A second passage connects to a source of air. The air passes adjacent to the first passage to heat fuel in the first passage. A jet pump is positioned downstream of the second passage to receive air from the second passage. The jet pump includes a tap connected to a housing compartment to drain fluid from the compartment. A method is also disclosed.

主权项

1. A heat exchanger and fluid drain system comprising:
a heat exchanger having a first passage to be connected to a source of fuel, and said heat exchanger having an outlet on said first passage to communicate fuel downstream; a second passage for connecting to a source of air, said source of air passing adjacent to said first passage to heat fuel in the first passage; a jet pump positioned downstream of said second passage for receiving air from said second passage, said jet pump including a tap to be connected to a housing compartment to drain fluid from the housing compartment; a valve configured to selectively route air into one of the second passage, or into a third passage, the third passage serving to cool the air when fuel heating is not necessary; and a sensor configured to senses the temperature of fuel, and control said valve in response to the temperature.