Joule thomson cooling effect

Ph.D. Course Work

1. JOULE -THOMSON COOLING EFFECT Presented By Md. Shahanawaj Ansari [Ph.D. Course Work] Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

2. What is joule- thomson EFFECT ? # Change in temperature of a gas occurs when its pressure changes suddenly through a valve or porous plug. # This phenomena was first observed by James Joule and Thompson in 1852. Hence it is called JOULE-THOMSON EFFECT Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

3. SCHEMATIC DIAGRAM Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

4. Throttling of real gas Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

5. Conditions for joule- thomson effect # System should be insulated # It is an adiabatic process # Exchange of heat, Q=0 # Pressure should fall rapidly Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

6. Mathematical formula for joule –thomson effect H = U + PV H= Enthalpy P= Pressure V= Volume U= Internal Energy # Total enthalpy of the real remains constant. Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

7. JOULE -THOMSON CO-EFFICIENT Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

8. Applications of joule- thomson effect #In refrigerator as cooling # In petro-chemical Industry used to liquefy the gases # In cryogenic engines to liquefy nitrogen and oxygen gases Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

9. Conclusion # It describes the enthalpy of the gases. # It supports the principle of conservation of energy # Heat-Pump engines are developed due to this effect. Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.)

10. Dr. C.V. RAMAN UNIVERSITY ,KOTA,BILASPUR (C.G.) Thank You