Table 1 Required grams of water per every kilogram of air to keep the air saturated at 21,000 and 50,000 Pa if the temperature increases from T (C) by ΔT

From: Thermodynamic evaluation of contrail formation from a conventional jet fuel and an ammonia-based aviation propulsion system

 

p = 21,000 Pa

 

T (C)

 

-30

-40

50

-60

-70

ΔT (C)

     

5

0.1773

0.0739*

0.0281*+

0.0097*+

0.0029*+

10

0.2221

0.0948

0.0371*

0.0132*+

0.0042*+

15

0.2796

0.1223

0.0494*

0.0182*+

0.0060*+

20

0.3535

0.1584

0.0660*

0.0252*+

0.0087*+

25

0.4481

0.2057

0.0882

0.0349*

0.0126*+

30

0.5694

0.2672

0.1180

0.0484*

0.0182*+

 

p = 50,000 Pa

 

T (C)

 

-30

-40

-50

-60

-70

ΔT (C)

     

5

0.0742*

0.0310*+

0.0118*+

0.0041*+

0.0012*+

10

0.0928

0.0397*

0.0156*+

0.0055*+

0.0018*+

15

0.1167

0.0512*

0.0207*+

0.0076*+

0.0025*+

20

0.1471

0.0663*

0.0277*+

0.0106*+

0.0036*+

25

0.1858

0.0859

0.0370*

0.0146*+

0.0053*+

30

0.2347

0.1113

0.0494*

0.0203*+

0.0076*+

  1. * indicates supersaturation caused by the proposed electric aircraft, and + indicates supersaturation caused by a conventional airplane consuming jet fuel.
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