Your task is to design an environmental control system for a

Your task is to design an environmental control system for a jet aircraft using your knowledge of thermodynamics.

The following diagram is from the sytems manual of an F-15, depicting a portion of the environmental control system (ECS). The \"working fluid\" of the ECS is air.

Answer or solve the following:

1. In one or two sentences, explain \"bleed air\" and where it originates from within the aircraft.

2. Temperatures may or may not be expected to vary between the four locations (1, 2, A & B). Use the symbols, (<, >, =) between each of the three temperatures to depict most likely relationships and explain:

I have the answer for 1 but need help with 2 and 3.

Solution

2) Temperature may be expected to vary between 1,2 & A,B locations.

3) Q = 156.63 kJ/kg, C_p = 1.026 kJ/kgK, T₂ = 22^oC = 295K

Q = C_p*(T₁ - T₂)

Substituting and solving, we get

T₁ = 174.66 ^oC