a light to be vaporizatio exchanger using 250 kPa steam of 90% quality. The heat losses to the surrounding air have been estimated to be 5% of the heat transferred from the condensing steam to the oil. If the steam condensate leaves at its saturation point, what mass of steam per hour will be used in the exchanger? For light oil, Snecific aravity- 0 88

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Subject: thermodynamics

3. 2 m^3/min of a light oil are to be heated from 20C to 10oC (with zero vaporization) in an
exchanger using 250 kPa steam of 90% quality. The heat losses to the surrounding air have been
estimated to be 5% of the heat transferred from the condensing steam to the oil. If the steam
condensate leaves at its saturation point, what mass of steam per hour will be used in the
exchanger?
For light oil,
Specific gravity= 0.88
Specific heat= 2.00 kJ/kg-K
For steam at 250 kPa,
Saturated liquid: hf= 535.49 kJ/kg
vf= 0.001067 m^3/kg
Saturated vapor: hg= 2716.8 kJ/kg
vg= 0.7188 m^3/kg
Transcribed Image Text:3. 2 m^3/min of a light oil are to be heated from 20C to 10oC (with zero vaporization) in an exchanger using 250 kPa steam of 90% quality. The heat losses to the surrounding air have been estimated to be 5% of the heat transferred from the condensing steam to the oil. If the steam condensate leaves at its saturation point, what mass of steam per hour will be used in the exchanger? For light oil, Specific gravity= 0.88 Specific heat= 2.00 kJ/kg-K For steam at 250 kPa, Saturated liquid: hf= 535.49 kJ/kg vf= 0.001067 m^3/kg Saturated vapor: hg= 2716.8 kJ/kg vg= 0.7188 m^3/kg
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