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Boeing
Boeing is one of the world's leading aerospace and commercial aircraft companies.
Project Objective
A water injection system is being proposed to reduce engine NOx and soot emissions as well as reduce engine maintenance costs. One part of the system involves the delivery of demineralized water to the engine. This is injected into the engine which leads to reduced combustor and turbine inlet temperatures that result in less NOx emissions and improved turbine life.
To ensure airplane safety and engine reliability, the airport's water delivery system must meet several requirements, among them are:
- This delivery system must insure that the water delivered to the engine is pure enough to prevent deterioration of any part of the engine.
- Fluids other than demineralized water must not be inadvertently, or deliberately, introduced into the airplane's water tank.
- The water must not be allowed to be put into another compartment, such as the fuel tank.
- The water in the distilled dispensing unit, or transport truck, at the airport must not freeze.
- There is also a possibility that the water injection system on the airplane will want to be used during certain parts of the flight other than at takeoff. In this case the distilled water will have to be stored and maintained above freezing in the aircraft wing tank via a heater.