Head of Department: Prof. Teodor Skiepko, DSc, PhD, Eng
Phone: +48 85 746 92 05
www.wm.ztcic.pb.edu.pl
E-mail: t.skiepko@pb.edu.pl

Research topics

1. Cooling and air-conditioning technology, with special focus on technologies connected with vehicles and buildings
   Research areas:
   ■ energy efficiency improvement in cooling systems, reduction of direct emission of greenhouse gases (CFC and HCFC),
   ■ application of ecological working fluids and systems driven by renewable energy sources,
   ■ development of ejection refrigeration systems driven by a low-temperature heat source, e.g. solar air-conditioning;
2. Recovery of the waste heat using recuperation, regeneration and the heat pump technology:
   ■ experimental investigation and numerical modelling of transport phenomena for selected processes and equipment,
   ■ analysis of operation of compact heat exchangers, water and steam boilers, regenerators, evaporators, condensers in air-conditioning systems, complex TEMA systems, analysis of condensation and boiling in mini channels, analysis of operation of heat exchangers based on the second law of the thermodynamics,
   ■ investigation of heat transfer and flow resistance in mini channels, application of mini channels in high efficiency refrigeration and air-conditioning systems operating with environmental friendly refrigerants,
   ■ optimization of energy conversion processes in power engineering.

Selected publications

1. Gagan J. Smierciew K., Butrymowicz D., et al. (2014), Comparative study of turbulence models in application to gas ejectors, International Journal of Thermal Sciences, 78, 9-15.
2. Butrymowicz D., Śmierciew K., Karwacki J., Gagan J. (2014), Experimental investigations of low-temperature driven ejection refrigeration cycle operating with isobutene, International Journal of Refrigeration, 39, 196-209.
3. Śmierciew K., Gagan J., Butrymowicz D., Karwacki J. (2014), Experimental investigations of solar driven ejector air-conditioning system, Energy and Buildingd, 80, 260-267.
4. Kołodziejczyk M. (2007), On a certain method for numerical analysis of the Navier – Stokes equations, Mathematical Methods and Physical Fields, 50(2),101-112.
5. Grygoruk C., Ratomski K., Kołodziejczyk M., Gagan J., Modliński J., Gajda B., Pietrewicz P., Mrugasz G. (2011), Fluid dynamics during embryo transfer, Fertility and Sterility, 96(2), 324-327.
6. Skiepko T., Shah R.K. (2004), Entropy Generation Extrema and Their Relationship with Heat Exchanger Effectiveness Number of Transfer Unit Behavior for Complex Flow Arrangements, Journal of Heat Transfer, Transactions ASME, 126(6), 994-1002.
7. Skiepko T., Shah R.K. (2005), Modelling and effect of leakages on heat transfer performance of fixed matrix regenerators, International Journal of Heat and Mass Transfer, 48(8), 1608-1632.
8. Skiepko T., Shah R.K. (2005), Exchanger Performance Behavior through Irreversibility Analysis for 1-2 TEMA G Heat Exchangers, Journal of Heat Transfer, Transactions ASME, 127(2), 1296-1304.
9. Butrymowicz D. (2013), Modern approaches to efficiency enhancement of thermal systems, Białystok, Printing House of Bialystok University of Technology, 213.

Test equipment

Floe-field diagnostic – PIV Measurements System

• measurement of the velocity field using the PIV technology;
• HI Sense PIV/PLIF camera and PIV SONY camera (resolution 1600×1200 pixels, 40 frames in full resolution, time between frames: 200 ns.);
• camera control module, laser optical measurement systems and sensor, positioning mechanism, image processor, Dynamic Studio Software;
• velocity field measurement;
• laser wavelength 532 nm;
• laser power 145 mW;
• frequency 15 Hz;
• precise positioning mechanism.

Aerodynamic tunnel

• investigation of conventional and mini-channels heat exchangers;
• steady and unsteady condition of investigation;
• dimensions: 1 x 1m;
• modern controlling system with data acquisition system;
• measurement of the temperature, pressure and relative humidity at ambient conditions;
• temperature sensor at the nozzle inlet;
• multiple spot temperature sensor at heat exchangerinlet and outlet;
• measurement of the static pressure drop at heat exchanger;
• measurement of the relative humidity of air at heat exchanger inlet and outlet;
• measurement of differential pressure at nozzle;
• measurement of the temperature and pressure of fluid at heat exchanger inlet and outlet;
• measurement of the fluid mass flow rate.

Vapour compression refrigeration system

• working fluid: propane;
• cooling capacity: 48 kW at -14oC/+45oC;
• investigation of vapour compression refrigeration systems;
• investigation of heat exchange and heat exchangers – evaporators and condensers;
• system suitable for external connections;
• modern controlling system with a data acquisition system.

Calorimeter KL-12Mn

• accuracy of temperature digital readout 0,001K;
• capacity of calorimetric bomb 0,35 dm3;
• marking the heat of combustion compliant with Polish Standard PN-C-04375;
• calibration with reference fluid;
• automatic control via a PC computer, storage and backup of test results.

Other laboratory equipment

• micro-interferometer BIOLAR PL;
• spectrometer Nicolet (Nexus);
• testing bench for the investigation of hydraulic pressure loss;
• multi-functional portable diesel and Jet Fuel analyser TD PPA, PetroSpec;
• multi-functional portable gasoline analyser GS PPA, PetroSpec.