Further extend usage section of README.md

README.md

@@ -54,12 +54,30 @@ To use the heat pump model classes in your own scripts, you can import them as f
 from heatpumps.models import HeatPumpSimple, HeatPumpEconIHX
 from heatpumps.parameters import get_params
 
+# Simple cycle model
+params = get_params('HeatPumpSimple')
+
+params['setup']['refrig'] = 'R1234yf'
+params['fluids']['wf'] = 'R1234yf'
+
+params['C3']['T'] = 85  # feed flow temperature of heat sink
+params['C1']['T'] = 50  # return flow temperature of heat sink
+
+hp = HeatPumpSimple(params=params)
+
+hp.run_model()
+hp.generate_state_diagram(diagram_type='logph')
+
+# Serial compression with closed economizer and internal heat exchanger
 econ_type = 'closed'
 params = get_params('HeatPumpEconIHX', econ_type=econ_type)
 
+params['ihx']['dT_sh'] = 7.5  # superheating by internal heat exchanger
+
 hp = HeatPumpEconIHX(params=params, econ_type=econ_type)
 
 hp.run_model()
+hp.perform_exergy_analysis(print_results=True)
 ```
 
 ## License