Abstract

In this study, the effects of the number of sub-channels on the thermal and hydrodynamic performance of plate heat exchangers (PHEs) designed to be used in balanced ventilation systems have been investigated numerically. In the design of PHEs, Taguchi method was used for 4 different effective factors (average air flow velocity, channel height, number of sub-channels and plate material) in 3 levels. Numerical analyzes of PHE models were performed with a CFD based package program. In Taguchi analysis, 2 and 6 sub-channels PHE models obtained close results (<1%) in terms of the number of sub-channels according to the selected performance parameter (combined thermal and hydrodynamic effectiveness-CTHE). And thus, the changes in recovered thermal power, pressure drop, flow effectiveness and thermal effectiveness in both PHE models were investigated depending on the average air flow velocity. According to the recovered thermal power and CTHE, it was found that the optimal average air flow velocity for both PHE models was 1.5 m/s. It has been determined that 2 sub-channels model is more advantageous in terms of thermal and hydrodynamic performance, weight and production

References

[1] Verhaart J. Balanced Ventilation System, Part of the problem or part of the solution? Final Report. April 23, 2010.
[2] Küçük H., Ünverdi M., Macar H. Havadan-havaya ısı geri kazanım cihazının Taguchi yöntemi ve HAD analizleri ile tasarımı. ULIBTK’17 21. Ulusal Isı Bilimi ve Tekniği Kongresi 2017;429-437.
[3] TESTO Whitepaper. CO2 izleme ve iç hava kalitesi. 2019.
[4] Wang Y., Kuckelkorn J., Zhao FY., Spliethoff H., Lang W. A state of art of review on interactions between energy performance and indoor environment quality in Passive House buildings. Renewable and Sustainable Energy Reviews 2017;72:1303-1319.
[5] https://www.hometips.com/how-it-works/ventilation-systems-exhaust.html. Access date: September 19, 2019.
[6] https://zehnderamerica.com/what-is-balanced-ventilation/. Access date: September 25, 2019.
[7] https://www.buildingscience.com/documents/information-sheets/info-611-balanced-ventilation-systems. Access date: September 25, 2019.
[8] Sakulpipatsin P, Cauberg JJM, Kooi HJ, Itard LCM. Application of the exergy concept to design effecient mechanical exhaust ventilation systems. In Building Simulation 2007. Pages 363-370.
[9] Kim MK. Baldini L. Energy analysis of a decentralized ventilation system compared with centralized ventilation systems in European climates: Based on review of analyses. Energy and Buildings 2016;111:424-433.
[10] Cuce M. Riffat S. A comprehensive review of heat recovery systems for building applications. Renewable and Sustainable Energy Reviews 2016;47:665-682.
[11] Šibalija TV., Majstorovic VD. Advanced Multiresponse Process Optimization: An Intelligent and Integrated Approach. Springer, 2016.
[12] Mori T., TSAI SC. Taguchi Methods Benefits, Impacts, Mathematics, Statistics, and Applications. ASME, 2011.
[13] Montgomery DC. Design and analysis of experiments. 4th ed. New York: John Wiley; 1997.
[14] Mitra A. Fundamentals of quality control and improvement. Wiley; 2016.
[15] Phadke, MS. Quality Engineering Using Robust Design. New Jersey: Prentice Hall; 1989.
[16] Ünverdi M., Küçük H. Performance comparison of plate heat exchangers designed using Taguchi method and computational fluid dynamics. Pamukkale Univ. Müh. Bilim Dergisi 2019; 25(4):373-386.
[17] Cengel, Y. Introduction to Thermodynamics and Heat Transfer. USA: McGraw-Hill; 2007.
[18] Kucuk H., Unverdi M. Plate heat exchanger design: a case study for ventilation systems of small residences. Innovations 2019;2:60-65
[19] ANSYS/Fluent Theory Guide. Version 15, Ansys Inc., 2013.
[20] ANSYS/Fluent User’s Guide. Version 15, Ansys Inc., 2013.
[21] Patankar SV. Numerical heat transfer and fluid flow. Washington, DC: Hemisphere; 1980.
[22] Winterbone DE. Turan A. Advanced Thermodynamics for Engineers. 2th ed. Oxford: Elsevier; 2015.
[23] Shah RK, Sekulic DP. Fundamentals of Heat Exchanger Design. Hoboken, New Jersey: John Wiley&Sons;2003.
[24] White FM. Fluid Mechanics. 8th ed. New York: McGraw-Hill; 2016.