ME 388 – Applied Instrumentation Laboratory Stirling Cooler Lab
Stirling Cooler Experiment
Laboratory Objectives Operating the Global Cooling Model 100B Stirling Cooler Applying Principles of Thermodynamic Calculating –Heat Rejected –Heat Lifted –Coefficient of Performance (COP)
Thermodynamics Ideal Stirling Cycle: –Regeneration - Cold –Expansion - ISO –Regeneration – Hot –Compression - ISO
Calculations Coefficient of Performance (COP) Heat Absorbed Delivered Power Heat Lost??
Calculations Heat Absorbed Heat Rejected
Procedure Setup Data Acquisition Turn on water and measure average flow Turn on heat accepter power Record data until heat accepter temperature reaches -30 °C Turn on heat rejecter power until equilibrium is reached around -20 °C Stop collecting data and turn off equipment
Transient Results
Results Temp.TimeCpdT/dtHeat LiftedPowerCOP (C)(sec) (J/kg-K) (K/s)(W) (experiment)(Global Cooling)(Carnot)
Results Volumetric Flow Rate Mass Flow Rate Equilibrium Heat Rejected Heat Lifted Heat Lost Power delivered COP 1.72E-6 m 3 /sec 1.72E-3 kg/sec W 4.52 W 7.67 W 9.86 W °C
Uncertainties Time: W t = 1 s Volume: W v = 1ml = m 3 Rejector Temp: W Tin = W Tout = 2C Current: 0.01 amps Voltage: 0.01 volts Stirling Power: 0.1 W
Uncertainty Analysis
Uncertainty Analysis (cont.)