Start-up Research on The Laboratory Micro CHP ORC Test Stand - PowerPoint PPT Presentation

Start-up Research on The Laboratory Micro CHP ORC Test Stand Sebastian Bykuć, Łukasz Breńkacz, Grzegorz Żywica, Piotr Klonowicz

System description Features: -Fluid: HFE7100 -Nominal power: 3 kW -Inlet pressure: 12 bar(a) -Inlet temperature: 170 º C -Outlet pressure: 1.18 bar(a)

System description

Object characteristics System description Prototype of peripheral pump Gear pump Gear pump

Object characteristics System description Design paramters: Rotational speed: 24 000 [rpm] Internal power: 3.00 [kW] Working medium: HFE 7100 Design paramters: Rotational speed: 35 000 [rpm] Internal power: 3.26 [kW] Working medium: HFE 7100 Cooperation with Lodz University of Technology (prof. Z. Kozanecki Team)

Object characteristics System description Model of the ORC power plant test stand Real construction

Object characteristics System description Flowmeter

Object characteristics System description Temperature and pressure sensors

System description

Results Flow rate 700 600 500 Q1 II I III Q2 Q (kg/h) 400 Q3 300 200 100 0 0 100 200 300 400 500 600 700 800 900 1000 Time (s) Mass flow rates (Q1- total flow rate, Q2-by-pass flow rate, Q3-turbine flow rate)

Results Pressure 10 9 8 Pressure of HFE 7100 (bar) P1 after evaporator 7 P2 before turbine P3 after turbine 6 P4 after regenerative heat exchanger P5 after condenser 5 P6 after pump I II III 4 3 2 1 0 100 200 300 400 500 600 700 800 900 1000 Time (s) Pressure curves in the time domain obtained during startup

Results Temperature 160 140 Temperature (°C) 120 T1 after pump T2 before turbine 100 T3 after turbine II I III T4 after regenerative heat exchanger 80 T5 after condenser T6 after pump 60 40 20 0 100 200 300 400 500 600 700 800 900 1000 Time (s) Temperature curves in the time domain obtained during startup

Results Turbine speed 26000 24000 22000 20000 Turbine speed (rpm) 18000 16000 III I II 14000 12000 10000 8000 6000 4000 2000 0 0 100 200 300 400 500 600 700 800 900 1000 Time (s) Rotational speed of turbogenerator in the time domain obtained during startup

Results Electric power 1400 1200 1000 Electric power (W) 800 I III II 600 400 200 0 0 100 200 300 400 500 600 700 800 900 1000 Time (s) Power generated in the time domain obtained during startup

Results Electric power plots

Conclusions -We have designed a fully functional micro CHP system with a hermetic microturbine based on a single, highly loaded stage. -The microturbine is fully hermetic -The gas bearings fully support the shaft even at low rotational speed, the turbine operation is very quiet -The detaled measurements of the efficiencies should be performed -"Real-life" conditions should be simulated and the system behavior should be examined

The research works presented in this presentation were financed by the project POIG.01.01.02-00- 016/08 “Model agroenergy complexes as an example of distributed cogeneration based on local renewable energy sources” Thank you for your attention The laboratory test stand of the ORC micro power plant Sebastian Bykuć, Łukasz Breńkacz, Grzegorz Żywica, Piotr Klonowicz