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A saturated mixture contains 100 lb of dry air. How much heat is required (Btu) to raise the dry bulb temperature from 30°F to 70°F? a)Find enthalpies of initial & final conditions b)Find the enthalpy differential c)Find heat energy by using     Q = m

A saturated mixture contains 100 lb of dry air. How much heat is required (Btu) to raise the dry bulb temperature from 30°F to 70°F? a)Find enthalpies of initial & final conditions b)Find the enthalpy differential c)Find heat energy by using     Q = m

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A saturated mixture contains 100 lb of dry air. How much heat is required (Btu) to raise the dry bulb temperature from 30°F to 70°F?

a)Find enthalpies of initial & final conditions

b)Find the enthalpy differential

c)Find heat energy by using     Q = m Δh

210 S0 |200 – 13 |190 85 85– – 1.2 180 65 85 WET BULB TEMPERATURE - °F: 170 E 11 160 80 80– 150 140 a 75 75- 130 A 70 110 2 70– 100 70 65– 60 60- 55- 50 55 8 50- 45 45- 40 40- S40% 36 35 2 30 25 20% 15 20= 1 10 10 10% RELATIVE HUMIDITY 10-= 5 -20– 10 15 20 60 65 70 85 95 100 110 115 120 DRY BULB TEMPERATURE - °F Linric Company Psychrometric Chart, www.linric.com 70 る ENTHALPY - BTU PER POUND OF DRY AIR VAPOR PRESSURE - INCHES OF MERCURY 3. 으。 15.5 HUMIDITY RATIO - GRAINS OF MOISTURE PER POUND OF DRY AIR 80 DEW POINT - °F 20 15.0 25%- 15% 14.5: 14.0 SPECIFIC VOLUME fAb OF DRY AIR- 13.5 %08 %06- 25 ENTHALPY - BTU PER POUND OF DRY AIR %0% %0%9 50% SATURATION TEMPERATURE - °F 50 13.0 45 35 12.5 30 20 42.0 LO
Transcribed Image Text:210 S0 |200 – 13 |190 85 85– – 1.2 180 65 85 WET BULB TEMPERATURE - °F: 170 E 11 160 80 80– 150 140 a 75 75- 130 A 70 110 2 70– 100 70 65– 60 60- 55- 50 55 8 50- 45 45- 40 40- S40% 36 35 2 30 25 20% 15 20= 1 10 10 10% RELATIVE HUMIDITY 10-= 5 -20– 10 15 20 60 65 70 85 95 100 110 115 120 DRY BULB TEMPERATURE - °F Linric Company Psychrometric Chart, www.linric.com 70 る ENTHALPY - BTU PER POUND OF DRY AIR VAPOR PRESSURE - INCHES OF MERCURY 3. 으。 15.5 HUMIDITY RATIO - GRAINS OF MOISTURE PER POUND OF DRY AIR 80 DEW POINT - °F 20 15.0 25%- 15% 14.5: 14.0 SPECIFIC VOLUME fAb OF DRY AIR- 13.5 %08 %06- 25 ENTHALPY - BTU PER POUND OF DRY AIR %0% %0%9 50% SATURATION TEMPERATURE - °F 50 13.0 45 35 12.5 30 20 42.0 LO
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