Recuperator with microjet technology as a proposal for heat recovery from low-temperature sources

• Autorzy: Wajs J. , Mikielewicz D. , Fornalik-Wajs E. , Bajor M.

Identyfikatory

DOI

10.1515/aoter-2015-0032

• Języki publikacji: EN

Abstrakty

EN

A tendency to increase the importance of so-called dispersed generation, based on the local energy sources and the working systems utilizing both the fossil fuels and the renewable energy resources is observed nowadays. Generation of electricity on industrial or domestic scale together with production of heat can be obtained for example through employment of the ORC systems. It is mentioned in the EU directive 2012/27/EU for cogenerative production of heat and electricity. For such systems the crucial points are connected with the heat exchangers, which should be small in size but be able to transfer high heat fluxes. In presented paper the prototype microjet heat exchanger dedicated for heat recovery systems is introduced. Its novel construction is described together with the systematical experimental analysis of heat transfer and flow characteristics. Reported results showed high values of the overall heat transfer coefficient and slight increase in the pressure drop. The results of microjet heat exchanger were compared with the results of commercially available compact plate heat exchanger.

Słowa kluczowe

EN

heat exchanger; microjet technology; heat recovery; Wilson plot method

PL

wymiennik ciepła; odzysk ciepła; metoda Wilsona

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2015
• Tom: Vol. 36, no. 4
• Strony: 49--64
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Wajs J.

• Gdansk University of Technology, Faculty of Mechanical Engineering, Department of Energy and Industrial Apparatus, Narutowicza 11/12, 80-233 Gdansk

autor

Mikielewicz D.

• Gdansk University of Technology, Faculty of Mechanical Engineering, Department of Energy and Industrial Apparatus, Narutowicza 11/12, 80-233 Gdansk

autor

Fornalik-Wajs E.

• AGH University of Science and Technology, Faculty of Energy and Fuels, Department of Fundamental Research in Energy Engineering, Mickiewicza 30, 30-059 Kraków

autor

Bajor M.

• Gdansk University of Technology, Faculty of Mechanical Engineering, Department of Energy and Industrial Apparatus, Narutowicza 11/12, 80-233 Gdansk

Bibliografia

• [1] KREITH F. et. al.: Heat and Mass Transfer. Mechanical engineering handbook. CRC Press LLC, 1999.
• [2] WAJS J., MIKIELEWICZ D., FORNALIK-WAJS E.: Microjet heat exchanger of cylindrical geometry, dedicated both to the general applications and heat recovery from low temperature waste energy sources. Patent application P.404601, 2013 (in Polish).
• [3] WAJS J., MIKIELEWICZ D., BAJOR M.: Design and construction details of analyzed microjet heat exchanger. Rep. IFFM PASci 1059/13, Gdańsk 2013 (in Polish).
• [4] WAJS J., MIKIELEWICZ D., BAJOR M.: Preliminary flow characteristics analysis of microjet heat exchanger. Rep. IFFM PASci 216/2014, Gdańsk 2014 (in Polish).
• [5] WILSON E.E.: A basis for rational design of heat transfer apparatus. Trans. ASME 37(1915), 47–82.
• [6] MIKIELEWICZ J.: Application of Wilson metod for calculation of heat transfer coefficient. Technika Chłodnicza i Klimatyzacja 6(1995), 215–216 (in Polish).
• [7] FERNÁNDEZ-SEARA J., UHÍA F., SIERES J., CAMPO A.: A general review of the Wilson plot method and its modifications to determine convection coefficients in heat exchange devices. Appl. Therm. Eng. 27(2007), 2745–2757.
• [8] WAJS J., MIKIELEWICZ D.: Effect of surface finish on heat transfer performance of plate heat exchanger. In: Proc. 9th Int. Conf. Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2012), Malta 2012.
• [9] WAJS J., MIKIELEWICZ D.: Influence of metallic porous microlayer on pressure drop and heat transfer of stainless steel plate heat exchanger. Appl. Therm. Eng. 93(2016), 1337–1346, http://dx.doi.org/10.1016/j.applthermaleng.2015.08.101.