Answer:
F
122
∘
F1
Step-by-step explanation:
The delta T (ΔT) is the temperature difference between the inlet and outlet of a system. In this case, for Feed Heater 1, the delta T can be calculated as follows:
Δ
�
=
Outlet Temperature
−
Inlet Temperature
ΔT=Outlet Temperature−Inlet Temperature
Δ
�
=
21
1
∘
F
−
19
9
∘
F
ΔT=211
∘
F−199
∘
F
Δ
�
=
1
2
∘
F
ΔT=12
∘
F
Therefore, the delta T for Feed Heater 1 is
∘
F
122
∘
F1
