THERMODYNAMIC ANALYSIS OF EXPANDER APPLICATIONS INREFRIGERATION CYCLES

Explain how the temperature drop during the expansion process relates and contributes to the propulsion effect. Under which conditions would the exhaust temperature be equal to the inlet temperature?

In which of the following scenarios is thermal expansion a potential problem? 2 marksConstructing a bridgeMaking ice cubesDesigning a computerGrowing plants

he temperature of a system decreases in an(1 Ponto)Adiabatic expansionisothermal expansionisothermal compressionadiabatic compression

From what you have seen or read, list two examples each of thermal expansion in solids thermal expansion in liquids thermal expansion in gases

Q1. An insulated piston-cylinder device contains 0.1 m3 of saturated R-134a vapour at a pressure of 0.75 MPa. The refrigerant is now allowed to expand at constant entropy (isentropically) until the pressure drops to 0.36 MPa. a) Sketch a diagram of the process indicating the system and direction of all relevant energy and/or mass flows. List all your assumptions. b) Determine the final temperature in the cylinder. c) How much work is done by the refrigerant?