In a spring-loaded piston-cylinder arrangement shown in Figure P4-57 0.03 m3 of air is contained in the spring-loaded piston-cylinder device shown in Figure. The spring constant is 875 N/m, and the piston diameter is 25 cm. When no force is exerted by the spring the piston, the state of the air is 2250 kPa and 240°C . This device is now cooled until the volume is one-half its original size. Determine the change in the specific internal energy and enthalpy of the air. solution: 185 kJ / kg , 258 kJ / kg

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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In a spring-loaded piston-cylinder arrangement shown in Figure P4-57 0.03 m3 of air is contained in the spring-loaded piston-cylinder device shown in Figure. The spring constant is 875 N/m, and the piston diameter is 25 cm. When no force is exerted by the spring the piston, the state of the air is 2250 kPa and 240°C . This device is now cooled until the volume is one-half its original size. Determine the change in the specific internal energy and enthalpy of the air. solution: 185 kJ / kg , 258 kJ / kg
ili
ce
ili
се
en
ki
bit
tm
erji
bit
eya
ve
öder
4-57) Şekil P4-57'de gösterilen yay-yüklü bir piston silin-
dır düzeneğinde 0.03 m³ hacminde hava bulunmaktadır. Yay
katsayısı 875 N/m ve piston çapı 25 cm'dir. Pistondaki yaya
güç uygulanmadığı durumda hava 2250 kPa ve 240°C'de
bulunmaktadır. Düzenek orjinalinin yarı hacmine gelene
kadar soğutulmuştur. Havanın özgül iç enerjisi ve entalpisin-
deki değişimi hesaplayınız. Çözüm: 185 kJ/kg, 258 kJ/kg
WWW
Hava
SEKİL P4-57
Yay
Transcribed Image Text:ili ce ili се en ki bit tm erji bit eya ve öder 4-57) Şekil P4-57'de gösterilen yay-yüklü bir piston silin- dır düzeneğinde 0.03 m³ hacminde hava bulunmaktadır. Yay katsayısı 875 N/m ve piston çapı 25 cm'dir. Pistondaki yaya güç uygulanmadığı durumda hava 2250 kPa ve 240°C'de bulunmaktadır. Düzenek orjinalinin yarı hacmine gelene kadar soğutulmuştur. Havanın özgül iç enerjisi ve entalpisin- deki değişimi hesaplayınız. Çözüm: 185 kJ/kg, 258 kJ/kg WWW Hava SEKİL P4-57 Yay
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