Journal Publications

1. Cop, M., Barta, R.B., Thomas, C., and Hesse, U. (2023), “Experimental Investigation of a Heat Pump Tumble Dryer with a Zeotropic Refrigerant Mixture,” International Journal of Refrigeration. https://doi.org/10.1016/j.ijrefrig.2023.11.018

 

2. Stöckel, K., Nosbers, R., Barta, R.B., and Thomas, C. (2023). “Measurement of Vapour Pressure, Miscibility and Thermal Conductivity for Binary and Ternary Refrigerant Lubricant Mixtures in the Context of Heat Pump Tumble Dryers,” International Journal of Refrigeration. https://doi.org/10.1016/j.ijrefrig.2023.04.016

 

3. Dora, S., Barta, R.B., and Mini, K.M. (2023). “Study on Foam Concrete Incorporated with Expanded Vermiculite/Capric Acid PCM – A Novel Thermal Storage High-Performance Building Material,“ Construction and Building Materials. https://doi.org/10.1016/j.conbuildmat.2023.131903

 

4. Ossorio, R., Navarro-Peris, E., and Barta, R.B. (2022). “Impact of Lubricant in the Performance of Variable Speed Heat Pumps Working with R290,” International Journal of Refrigeration. https://doi.org/10.1016/j.ijrefrig.2022.10.003

 

5. Karaefe, R.E., Post, P., Venzik, V., Wotzka, P., Barta, R.B., Di Mare, F., and Müller, D. (2022). “On Integrated Fluid Screening and Turbomachinery Design for Optimized Industrial Heat Pumps,” Journal of Engineering for Gas Turbines and Power.  GTP-22-1422, https://doi.org/10.1115/1.4055795

 

6. Barta, R.B., Ziviani, D., and Groll, E.A. (2021). “Design and Commissioning of a Modular Multi-Stage Two-Evaporator Transcritical CO2 Test Stand,” International Journal of Refrigeration. https://doi.org/10.1016/j.ijrefrig.2021.05.033

 

7. Barta, R.B., Dhillon, P., Braun, J.E., Ziviani, D., and Groll, E.A. (2021). “Design and Optimization Strategy for Ejector Applied in Refrigeration Cycle,” Applied Thermal Engineering. https://doi.org/10.1016/j.applthermaleng.2021.116682

 

8. Barta, R.B., Ziviani, D., and Groll, E.A. (2021). “Review of Stationary and Transport CO2 Refrigeration and Air Conditioning Technologies,” Applied Thermal Engineering. 185. https://doi.org/10.1016/j.applthermaleng.2020.116422

 

9. Barta, R.B., Ziviani, D., and Groll, E.A. (2020). “Experimental Analyses of Different Control Strategies of an R-410A Split-System Heat Pump by Employing a Turbomachinery Expansion Recovery Device.” International Journal of Refrigeration. 112, pp. 189-200. https://doi.org/10.1016/j.ijrefrig.2019.12.027

 

Book Chapter                      

Bahman, A.M., Barta, R.B., Groll, E.A. and Ziviani, D. (2021). “Theoretical Analysis of the CO2 Expansion Process,” Transcritical CO2 Heat Pump: Fundamentals and Applications, pp. 99-135.

 

Patents

  1. Bederna, B.G., Barta, R.B., and Koschel, P. “System und Verfahren zum Kühlen einer Brennstoffzelle“ (System and Procedure to Cool a Fuel Cell). (Application submitted February 6th, 2023). DE 10 2023 102 803.0

 

  1. Bederna, B.G., Doerffel, C., Koschel, P. and Barta, R.B. “Vorrichtung und Verfahren zur Durchführung einer effizienten Zweiphasenkühlung einer Brennstoffzelle für mobile Anwendungen“ (Device and procedure to carry out efficient two-phase cooling of a fuel cell for mobile applications). (Application submitted November 22nd, 2022). DE 10 2022 130 895.2

 

  1. Ladd, D., Groll, E.A., Barta, R.B., and Ziviani, D. (2022). “Systems and Methods for Implementing Ejector Refrigeration Cycles with Cascaded Evaporation Stages,” US2022/0357078 A1.

 

  1. Barta, R.B., Simon, F., Ziviani, D., and Groll, E.A. (2020). „Control Method for Vapor Compression Cycle,” US2021/0180835 A1.

 

Refereed Conference Proceedings and Presentations

  1. Stöckel, K., Barta, R.B., and Thomas, C., “Investigation of a Heat Pump Dishwasher with Natural Refrigerant Mixture,” Proc. of the 26th IIR Int’l Congress of Refrigeration, Paper 926, Paris, France, August 21-25, 2023. DOI: 10.18462/iir.icr.2023.0926

 

  1. Kücükkaya, D., Cop, M., Barta, R.B., and Thomas, C., “Experimental Investigation of a New Ultra-Low Temperature Refrigerant to Replace R23 in an Environmental Test Chamber,” Proc. of the 26th IIR Int’l Congress of Refrigeration, Paper 495, Paris, France, August 21-25, 2023. DOI: 10.18462/iir.icr.2023.0495

 

  1. Koschel, P., Bederna, B.G, Schönheit, M., Raddatz, M., and Barta, R.B., and Thomas, C., “Comparison of Different Architectures for Two-Phase Cooling of Polymer Electrolyte Fuel Cells in Aircraft,” Proc. of the 26th IIR Int’l Congress of Refrigeration, Paper 170, Paris, France, August 21-25, 2023. DOI: 10.18462/iir.icr.2023.0170

 

  1. Herden, D., Doerffel, C., and Barta, R.B., “Development of a Highly Efficient CO2 Ejector Cycle with Specially Designed High-Lift Ejector and Additional Subcooling Heat Exchanger for a Supermarket Booster System,” Proc. of the 26th IIR Int’l Congress of Refrigeration, Paper 228, Paris, France, August 21-25, 2023. DOI: 10.18462/iir.icr.2023.0228

 

  1. Bederna, B.G., Barta, R.B., and Thomas, C., “Thermodynamic Concept of a Novel Recuperative Two-Phase Heat Pump Cycle,” Proc. of the 26th IIR Int’l Congress of Refrigeration, Paper 588, Paris, France, August 21-25, 2023. DOI: 10.18462/iir.icr.2023.0588

 

  1. Stöckel, K., Barta, R.B., and Thomas, C., „Vermessung von Öl-Kältemittel-Schäumen (Meausurement of oil refrigerant foaming),“ Proc. of the Annual DKV-Conference, Magdeburg, Germany, November 16-18, 2022.

 

  1. Xu, Y., Pan, F., Barta, R.B., and Hesse, U. “A Numerical Model for Solid-Gaseous Two-Phase Flow of CO2 Flow with Sublimation in Pipes,” Proc. of the 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants, Trondheim, Norway, June 13-17, 2022. 10.18462/iir.gl2022.0047.

 

  1. Doerffel, C., Barta, R.B., and Hesse, U. “Experimental Investigation of Part-Load Performance of Enhanced CO2 Refrigeration Systems,” Proc. of the 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants, Trondheim, Norway, June 13-17, 2022. 10.18462/iir.gl2022.0035.

 

  1. Karaefe, E.K., Post, P., Venzik, V., Barta, R.B., Müller, D., and Di Mare, F., “On Integrated Fluid Screening and Turbomachinery Design for Optimized Industrial Heat Pumps,” Proc. of the ASME Turbo Expo, Rotterdam, The Netherlands, June 13-17, 2022.

 

  1. Xu, Y., Barta, R.B., and Hesse, U., „Experimentelle Untersuchung eines CO2-Sublimationskreislaufs im Dauerbetrieb (Experimental investigation of a CO2 sublimation cycle during longer operation),“ Proc. of the Annual DKV-Conference, Dresden, Germany, November 17-19, 2021.

 

  1. Bederna, B.G., Brandel, J., Barta, R.B., and Hesse, U., „Prozesse mit Anpassung der Gemischkonzetration (Processes with adjustment of refrigerant mixture composition),“ Proc. of the Annual DKV-Conference, Dresden, Germany, November 17-19, 2021.

 

  1. Bederna, B.G., Micus, F., Ziegler, O., Barta, R.B., and Hesse, U., „Anlage zur flexiblen Kraft-Kälte-Kopplung (Mechanical Assembly for flexible connection of power and cooling generation),“ Proc. of the Annual DKV-Conference, Dresden, Germany, November 17-19, 2021.

 

  1. Ohler, M., Bederna, B.G., Barta, R.B., and Hesse, U., „Life Cycle Assessment (LCA) of an Air-Cooled ORC System for Waste Heat Recovery,“ Proc. of the 6th Int’l Seminar on ORC Power Systems,, Paper 22, Munich, Germany, October 11-13, 2021.

 

  1. Bederna, B.G., Barta, R.B., and Hesse, U., „Composition Optimization of Zeotropic Mixtures for ORC Systems Considering Constraints,“ Proc. of the 6th Int’l Seminar on ORC Power Systems, Paper 21, Munich, Germany, October 11-13, 2021.

 

  1. Doerffel, C., Barta, R.B., Thomas, C., and Hesse, U., “Experimental Investigation of Enhanced CO2 Refrigeration Systems at Varying Operating Conditions,” Proc. of the IIR Conference on Ammonia and CO2 Refrigeration Technologies, Ohrid, Macedonia, September 16-17, 2021.

 

  1. Stöckel, K., Nosbers, R., Barta, R.B., Thomas, C., and Hesse, U., „Experimental Investigation of Thermophysical Properties of Lubricant Refrigerant Mixtures,“ Proc. of the 6th IIR Conference on Thermophysical Properties and Transport Properties of Refrigerants, Paper 1917, Padova, Italy, September 1-3, 2021.

 

  1. Ren, J., Barta, R.B., Ziviani, D., and Groll, E.A., “Investigation of a Novel Ejector-Based R-290 Refrigeration Cycle,” Proc. of the 2021 ASHRAE Winter Conference, Chicago, Illinois, February 9-11, 2021.

 

  1. Barta, R.B., Bahman, A.M., Stania, L., Ziviani, D., and Groll, E.A., “Experimental and Mechanistic Numerical Analysis of a Variable Speed Residential Heat Pump Unit with an Expansion Work-Recovery Device,” Proc. of the 13th IEA Heat Pump Conference, Paper 82, Jeju, Korea, September 21-24, 2020.

 

  1. Shelly, T.J., Barta, R.B., Ziviani, D., and Groll, E.A., “Dynamic Modeling and Charge Minimization Study of a Packaged Propane Heat Pump with External Flow Reversal for Cold Climates,” Proc. of the 13th IEA Heat Pump Conference, Paper 102, Jeju, Korea, September 21-24, 2020.

 

  1. Barta, R.B., Ziviani, D. and Groll, E.A., “Development of Multi-Stage Two-Evaporator Transcritical Carbon Dioxide Cycle for Experimental Comparisons of Expansion Work Recovery Technologies,” Proc. of the 2020 ASHRAE Winter Conference, Orlando, Florida, February 1- 5, 2020.        

 

  1. Barta, R.B., Ziviani, D. and Groll, E.A., “Dynamic Modeling and Control Strategy of a Transcritical CO2 Cycle for a Multi-Temperature Refrigerated Container System for Military Applications,” Proc. of the 25th IIR Int’l Congress of Refrigeration, Paper 208, Montreal, Canada, August 24-30, 2019. DOI: 10.18462/iir.icr.2019.208

 

  1. Barta, R.B., Groll, E.A., and Hugenroth J.J., “Modeling and Control Strategy of a Transcritical Carbon Dioxide Cycle for Application in Multi-Temperature Refrigerated Container System,” Proc. of the 13th IIR Gustav Lorentzen Conference on Natural Refrigerants, Paper 1116, Valencia, Spain, June 18-20, 2018. DOI: 10.18462/iir.gl.2018.1116

 

  1. Barta, R.B., Groll, E.A., and Hugenroth J.J., “Modeling of S-RAM Energy Recovery Compressor Integration in a Transcritical Carbon Dioxide Cycle for Application in Multi-Temperature Refrigerated Container Systems,” Proc. of the 13th IIR Gustav Lorentzen Conference on Natural Refrigerants, Paper 1117, Valencia, Spain, June 18-20, 2018. DOI: 0.18462/iir.gl.2018.1117

 

  1. Barta, R.B. and Groll, E.A., “Application of Viper Energy Recovery Expansion Device in Transcritical Carbon Dioxide Refrigeration Cycle,” Proc. of the 12th IEA Heat Pump Conference, Paper 09, Rotterdam, The Netherlands, May 15-18, 2017.

 

Non-Peer Reviewed Conference Papers and Presentations

  1. Bederna, B.G. and Barta, R.B., “Potential of Power and Heat Prosumers for Climate-Neutral Energy Systems,” Proc. of the 19th International Refrigeration and Air Conditioning Conference at Purdue, Paper 2360, West Lafayette, IN, USA July 10 – 14, 2022.

 

  1. Winkler, T., Cop, M., Barta, R.B., and Hesse, U., “Experimental Investigation of a New Ultra-Low Temperature Refrigerant in an Environmental Test Chamber,” Proc. of the 19th International Refrigeration and Air Conditioning Conference at Purdue, Paper 2206, West Lafayette, IN, USA July 10 – 14, 2022.

 

  1. Kramer, T., Lemberg, K., Barta, R.B., Raddatz, M., and Hesse, U., “Experimental Investigation of Additively Manufactured Microchannel Evaporator Performance Using Low-GWP Refrigerants Compared to Conventional Air Cooling in Electronics Cooling,” Proc. of the 19th International Refrigeration and Air Conditioning Conference at Purdue, Paper 2324, West Lafayette, IN, USA July 10 – 14, 2022.

 

  1. Ossorio, R., Navarro-Peris, E., Barta, R.B., and Lopez, A., “Impact of Lubricant in Variable Speed Heat Pumps with R290,” Proc. of the 19th International Refrigeration and Air Conditioning Conference at Purdue, Paper 2215, West Lafayette, IN, USA July 10 – 14, 2022.

 

  1. Alhussain, O., Bahman, A., Barta, R.B., Ziviani, D., and Groll, E.A., “Refrigerant Charge Optimization of a Variable Speed Residential Heat Pump with an Expander/Separator,” Proc. of the 19th International Refrigeration and Air Conditioning Conference at Purdue, Paper 2154, West Lafayette, IN, USA July 10 – 14, 2022.

 

  1. Doerffel, C., Barta, R.B., and Hesse, U., „Untersuchung effizienzsteigernder Maßnahmen an einer CO2-Kälteanlage im Teillastbetrieb (Investigation of efficiency-increasing measures on a CO2 refrigeration system in part-load operation),“ Proc. of the Annual DKV-Conference, Dresden, Germany, November 17-19, 2021.

 

  1. Barta, R.B., Dhillon, P., Ziviani, D., Braun, J.E., and Groll, E.A., “Experimental and Numerical Optimization of a Variable-Geometry Ejector in a Transcritical CO2 Refrigeration Cycle,” Proc. of the 18th Int’l Refrigeration and Air Conditioning Conf. at Purdue, Paper 2569, Purdue University, West Lafayette, IN, USA, Mai 24-28, 2021

 

  1. Barta, R.B., Beck, P.E., Ziviani, D., and Groll, E.A., “Experimental Comparison of Cycle Modifications to a Multi-Stage Two-Evaporator Transcritical CO2 Refrigeration Cycle,” Proc. of the 18th Int’l Refrigeration and Air Conditioning Conf. at Purdue, Paper 2166, Purdue University, West Lafayette, IN, USA, Mai 24-28, 2021

 

  1. Barta, R.B., Ziviani, D., and Groll, E.A., “Numerical Analysis of Active Flow Boiling Regime Management Using a Vapor-Compression Cycle Applied to Electronic Processor Cooling,” Proc. of the 18th Int’l Refrigeration and Air Conditioning Conf. at Purdue, Paper 2167, Purdue University, West Lafayette, IN, USA, Mai 24-28, 2021

 

  1. Barta, R.B., Simon, F., and Groll, E.A., “Experimental Analysis and Design Improvements on Combined Viper Expansion Work Recovery Turbine and Flow Phase Separation Device Applied in R410A Heat Pump,” Proc. of the 17th Int’l Refrigeration and Air Conditioning Conf. at Purdue, Paper 2251, Purdue University, West Lafayette, IN, July 9-12, 2018.

 

  1. Barta, R.B., Hugenroth, J., and Groll, E.A., “Modeling of S-RAM Energy Recovery Compressor in Transcritical Carbon Dioxide Cycle for Application in Electronics Cooling in Variable Gravity,” Proc. of the 17th Int’l Refrigeration and Air Conditioning Conf. at Purdue, Paper 2489, Purdue University, West Lafayette, IN, July 9-12, 2018.

 

  1. Czapla, N., Inamdar, H., Barta, R.B. and Groll, E.A., “Theoretical Analysis of the Impact of an Energy Recovery Expansion Device in a CO2 Refrigeration System,” Proc. of the 23rd Int’l Compressor Eng. Conf. at Purdue, Paper 1550, Purdue University, West Lafayette, IN, July 11-14, 2016.

 

Periodicals and Articles

  1. Cop, M., Mickoleit, E., Stoeckel, K., Barta, R.B., Jaeger, A., Hesse, U., Breitkopf, C. (2022) „ Predictive Screening of Working Fluid Mixtures to Increase the Energy Efficiency of Refrigeration Systems and Heat Pumps,”IEA Annex 54 Yearly Report.

 

  1. Bederna, B.G., Ziegler, O., Barta, R.B., Hesse, U. (2022), „Anlagekonzept zur flexiblen Kraft-Kälte.-Kopplung (System concept for flexible combined cooling-heating-power cycles),“ KI.