Turbomachinery

Activity

1. Cycles optimization and plant management:
   a. analysis of innovative solutions for industrial refrigeration plant management;
   b. theoretical analysis of direct and inverse thermodynamic by means of not conventional organic fluids.
2. Heat transfer in turbo machinery:
   a. experimental analysis of fluidized beds heat exchangers for regenerative heat internal combustion engines recovery systems;
   b. high temperature heat transfer mechanism between hot gases and gas turbine components;
   c. anti-icing de-icing systems for wind turbines.
3. Cooling systems for Gas Turbines and thermal machines:
   a. thermal barrier application for engine components;
   b. thermal machines refrigeration systems; experimental and theoretical study on transpiring-effusion systems.
4. Hydrogen:
   a. safe handling;
   b. innovative cooling for hydrogen fuelled turbines;
   c. wind-hydrogen systems.
5. Renewable energies:
   a. Small hydro plants;
   b. Wind energy: innovative solutions for cold climates operations.

Staff

Responsible: Lorenzo Battisti - Associate Professor

• Alessandra Brighenti - Ph.D.
• Luca Zanne - Ph.D. Student
• Filippo Degasperi - Technical Assistant
• Sergio Dell’Anna - Technical Assistant

Facilities

MSF - Medium speed wind tunnel - unheated open flow loop that operates in aspiration mode sucking ambient air with the following characteristics:

• test chamber section 300 X 300 mm;
• test section velocity 0÷50 m/s;
• drive system 2 X 6kW assial fans;

LSF1 - Low speed blow-down wind tunnel – heated open flow loop that operates in aspiration mode sucking ambient air through a quadrant vane nozzle inlet, for transient state heat transfer measurements. Main characteristics are:

• test chamber section 50X50 mm;
• test section velocity 0÷20 m/s;
• maximum flow temperature 353 K
• drive system 1 X 22.5 kW centrifugal blower;

LSF2 - Low speed wind tunnel – heated open flow loop that operates in aspiration mode sucking ambient air through a quadrant vane nozzle inlet, for steady state heat transfer measurements. Main characteristics are:

• test chamber section 50X50 mm;
• test section velocity 0÷20 m/s;
• maximum flow temperature 353 K
• drive system 1 X 22.5 kW centrifugal blower;

IWT - Icing wind tunnel – (under construction). Main characteristics are:

• test chamber section 300X300 mm;
• test section velocity 0÷70 m/s;
• drive system 1 X 45 kW centrifugal blower;
• minimum air temperature -10°C;
• water spraying system.

HF1 - Hydrodynamic tunnel: closed loop tunnel . Main characteristics are:

• test chamber section 80X80 mm;
• maximum test chamber velocity (Venturi nozzle) 40 m/s;
• drive system 1 X 15kW centrifugal pump;

HF2 - Machinery section – closed loop for micro hydraulic pumps and turbines test. Main characteristics are:

• 1 X 11.5 kW c.c. motor/generator;
• 1 X c.a./c.c. converter;
• booster pump H=80 m, Q=120 m3/h (45 kW);
• pneumatic control valve.

Instruments

Velocimetry
Laser Doppler anemometer "Dantec - 1D, back scattering, FVA"
Costant Temperature Anemometer System "TSI - mod. IFA 300"

Image acquisition

Digital high speed area scan camera "Dalsa- mod. CA-D1 0064 (2930 fps)"
Digital camera "Nikon- mod. Coolpix5400"

Sensors

Pressure calibrator "Druck- Type. DPI 610 (-70 to 70 mbar)"
Pressure scanner "Pressure Systems- mod. 9010 (16 channels, ± 2.5kPa)"
Pressure transducer "Lucas Schaevitz -mod. P2102 differential (± 2.5 bar)"
Pressure transducer "Druck- Type. LPM 5480 (0-5 mbar)"
Pressure transducer "Druck- Type. PDCR 4110 differential (0-70 mbar)"
Pressure transducer "Druck- Type. PMP 4170 differential (0-10 bar)"
Pressure transducer "MKS- mod. 223BD differential (0-10 Torr)"
Piezoelectric transducer "Kistler- Type. 603B1 (15000 psi, 500 kHz)"
Piezoelectric transducer "PCB- Type. M116A (100 psi, 125 kHz)"
2 Piezoresistive transducers "Kulite- mod. XTME 190M (140 bar, 1250 kHz)"
2 Electromagnetic flow measuring systems "Endress+Hauser - mod. Promag 33"
Thermo chromic Liquid Crystals "Hallcrest- TLC Sprayable Coating"
Torque transducer, encoder "Staiger Mohilo.-.type IE/Model W (50 Nm)"
2 platinum resistance thermometer "Hart Scientific - mod. 5627"

Electric and electronic facilities

High Temperature Air Heater "Sylvania- mod. Superserp X (36kW)"
DC power supply "Agilent Technologies- mod. 6684A (5kW 32V 128A)"
Electronic stroboscope "Strobotac- mod. 1538 (110-150000 rpm)"

Measurament and Data Acquisition systems

Plug in multifunction DAQ board "NI- mod. PCI 6034E"
Plug in DAQ board "Nicolet- mod. BE490XE"
Data acquisition/switch unit "Agilent Technologies- mod. 34970A"
Multimeter "Hewlett Packard mod. 34401A"
FFT analyzer for fast real time processing "Yokogawa- mod. SA2400"