REDUCTION OF ENERGY USE IN INDUSTRIAL FACILITY

Abstract

Energy saving potentials related to steam generation and its usage in the medium size bakery are analyzed and presented. Input data needed for the investigation are gathered through detailed energy audit. Four energy savings measures are analysed in detail: 1) change of heat generator for space heating and domestic hot water preparation from steam boiler to condensing boiler, 2) reduction of heat losses from steam and condensate distribution lines, 3) heat utilization of return condensate and 4) replacement of the old, low efficiency steam boiler with high-efficient one. Implementation of these measures will result in substantial reduction of energy costs, ranging from 2.900 to 26.200 € annually. Interaction of all measures is analysed through energy efficiency improvement scenario, whose implementation will ensure significant energy cost savings, estimated at 40.793 € annually, with simple payback period shorter than 4 years. Implementation of presented measures will improve facility’s energy efficiency, represented through reduction of annual energy performance indicators by 6,14 %. Presented analysis revealed that steam generation and its usage in the industrial facilities offer a substantial potential for reduction of energy use and energy related cost.

Keywords

• Energy Audit
• Medium Size Bakery
• Energy Savings
• Energy Performance Indicator

References

1. [1] IEA, “Energy Balances of non-OECD Countries 2014,” Paris, 2014. doi: https://doi.org/10.1787/19962843-en.
2. [2] N. 40/6. Official Gazette of Bosnia and Herzegovina, “Bosnia and Herzegovina National Energy Efficiency Action Plan (NEEAP) 2016 - 2018.”
3. [3] IAE, “Energy Balances of non-OECD Countries 2015,” Paris, 2015. doi: 10.1787/energy_bal_non-oecd-2015-en.
4. [4] H. Lu, L. Price, and Q. Zhang, “Capturing the invisible resource: Analysis of waste heat potential in Chinese industry,” Appl. Energy, vol. 161, no. 2016, pp. 497–511, 2016, doi: 10.1016/j.apenergy.2015.10.060.
5. [5] Ö. Boydak, I. Ekmekçi, M. Yilmaz, and H. Köten, “Thermodynamic investigation of Organic Rankine Cycle (ORC) energy recovery system and recent studies,” Therm. Sci., vol. 2018, no. 6, pp. 2679–2690, 2018, doi: 10.2298/TSCI170720103B.
6. [6] K. Balaji and R. Ramkumar, “Study of waste heat recovery from steam turbine xhaust for vapour absorption system in sugar industry,” Procedia Eng., vol. 38, pp. 1352–1356, 2012, doi: 10.1016/j.proeng.2012.06.167.
7. [7] Y. Luo, E. Woolley, S. Rahimifard, and A. Simeone, “Improving energy efficiency within manufacturing by recovering waste heat energy,” J. Therm. Eng., vol. 1, no. 5, pp. 337–344, 2015, doi: 10.18186/jte.49943.
8. [8] F. Ünal, G. Temir, and H. Köten, “Energy, exergy and exergoeconomic analysis of solar-assisted vertical ground source heat pump system for heating season,” J. Mech. Sci. Technol., vol. 32, no. 8, pp. 3929–3942, Aug. 2018, doi: 10.1007/s12206-018-0744-1.

9. [9] S. Meyers, B. Schmitt, M. Chester-Jones, and B. Sturm, “Energy efficiency, carbon emissions, and measures towards their improvement in the food and beverage sector for six European countries,” Energy, vol. 104, pp. 266–283, 2016, doi: 10.1016/j.energy.2016.03.117.
10. [10] J. I. Chowdhury, Y. Hu, I. Haltas, N. Balta-Ozkan, G. Matthew, and L. Varga, “Reducing industrial energy demand in the UK: A review of energy efficiency technologies and energy saving potential in selected sectors,” Renew. Sustain. Energy Rev., vol. 94, no. February, pp. 1153–1178, 2018, doi: 10.1016/j.rser.2018.06.040.
11. [11] A. Ladha-Sabur, S. Bakalis, P. J. Fryer, and E. Lopez-Quiroga, “Mapping energy consumption in food manufacturing,” Trends Food Sci. Technol., vol. 86, no. December 2018, pp. 270–280, 2019, doi: 10.1016/j.tifs.2019.02.034.
12. [12] D. Kadric, N. Delalic, S. Midzic-Kurtagic, B. Delalic, and A. Hodzic, “Energy efficiency assestment and improvement measures for a medium size bakery,” Int. Conf. Innov. Technol. IN-TECH 2017, pp. 315–321, 2017.
13. [13] M. Kiliç and A. F. Altun, “Achieving Green Building Standards via Energy Efficiency Retrofit: A Case Study of an Industrial Facility,” Exergetic, Energ. Environ. Dimens., pp. 55–69, 2018, doi: 10.1016/B978-0-12-813734-5.00003-2.
14. [14] T. Taner and A. S. Dalkilic, “A feasibility study of solar energy-techno economic analysis from Aksaray city, Turkey,” J. Therm. Eng., vol. 5, no. 1, pp. 25–30, 2019.
15. [15] S. Bazarchi, G. R. N. Bidhendi, I. Ghazi, and A. Kasaeian, “a Techno-Economic Feasibility Study for Reducing the Energy Consumption in a Building: a Solar Energy Case Study for Bandar Abbas,” J. Therm. Eng., vol. 6, no. 4, pp. 633–650, 2020, doi: 10.18186/thermal.766463.
16. [16] A. Le-bail, T. Dessev, V. Jury, R. Zuniga, T. Park, and M. Pitroff, “Energy demand for selected bread making processes: Conventional versus part baked frozen technologies,” J. Food Eng., vol. 96, no. 4, pp. 510–519, 2010, doi: 10.1016/j.jfoodeng.2009.08.039.
17. [17] B. Visočnik Petelin and T. Skobe, “Energy Benchmarking Report. Slovenia,” 2005.
18. [18] J. Bujak, “Mathematical modelling of a steam boiler room to research thermal efficiency,” Energy, vol. 33, no. 12, pp. 1779–1787, 2008, doi: 10.1016/j.energy.2008.08.004.
19. [19] N. 81/19. Official Gazette of Federation of Bosnia and Herzegovina, “Rulebook on minimum requirements for energy performance of buildings,” 2019. [Online]. Available: http://www.ee-infos.ba/Content/docs/pravilnikominimalnimzahjtevima.pdf.
20. [20] CIBSE, “The economic thickness of insulation for hot pipes,” pp. 1–55, 1996, [Online]. Available: https://www.cibse.org/getmedia/3c90596e-89e7-437c-989a-3ad5f939eab5/FEB08-Economic-Thickness-of-Insulation-for-Hot-Pipes-1993-rep-1996.pdf.aspx.