Parametric Analysis of a Plain-Fin Compact Heat Exchanger for a Small-Scale Gas Turbine

Yıl 2020, , 287 - 300, 01.04.2020

Princely Kolle Epie , Can Haşimoğlu Göhkan Coşkun , Hakan Serhad Soyhan

https://doi.org/10.16984/saufenbilder.603756

Öz

The influence of the thermal parameters of a Plain-Fin Compact Heat Exchanger on its performance is examined in this paper. The objective of this work is to analyse the effect of the different flow and geometric parameters on the output performance of a plain fin compact heat exchanger (PFCHE) designed to be used on a small-scale gas turbine and how these parameters can be used for the optimisation of PFCHEs.
In this work, we examined the effects of the variation of input parameters of a plain-fin compact heat exchanger (fin length, fin height, fin thickness, mass flow rate of air and turbine exhaust gas) on the output performance of the heat exchanger (Overall heat exchanger efficiency, fin heat transfer efficiency and the outlet temperatures). The analytical expressions for the outlet temperatures and heat exchanger efficiencies were derived and analysed. Then the derived model was designed and simulated using CFD codes. Also, from the derived expressions, the performance model of the heat exchanger was programmed for analysis. From the results, it shows that the effectiveness (e-value), fin length, fin height and mass flow rates of the gases influence performance of a plain-fin compact heat exchanger. A 50% reduction in fin height can cause as much as an 18% increase in the fin efficiency of the heat exchanger. While a 50% increase in the effectiveness value can cause as much as a 40% increase in the outlet temperature.

Anahtar Kelimeler

Heat exchanger, compact heat exchanger, gas turbine, fin efficiency, PFCHE, fin length, fin height

Kaynakça

• [1] Medicine NA of SE and. Commercial Aircraft Propulsion and Energy Systems Research. 2016. doi:10.17226/23490.
• [2] Mcdonald CF, Massardo AF, Rodgers C, Stone A, Mcdonald CF, Rodgers C, et al. Recuperated gas turbine aeroengines . Part III : engine concepts for reduced emissions , lower fuel consumption , and noise abatement 2008. doi:10.1108/00022660810882773.
• [3] Thulukkanam K. Heat exchanger design handbook 2nd Edition. 2013.
• [4] Ramesh K. Shah, Dušan P. Sekulic. Fundamentals of Heat Exchanger Design. 2003.
• [5] Spakovsky) ZS. Thermodynamics and Propulsion. n.d.
• [6] Thakre PB, Pachghare PR. Performance Analysis on Compact Heat Exchanger. Mater Today Proc 2017;4:8447–53. doi:10.1016/j.matpr.2017.07.190.
• [7] Vr R, R AK. Parametric Study of Heat Transfer and Pressure Drop Characteristics of a Rectangular Offset Strip Fin Compact Heat Exchanger 2018;71:1381–6. doi:10.3303/CET1871231.
• [8] Doğan B. EXPERIMENTAL ANALYSIS OF THE EFFECT OF COLD FLUID INLET TEMPERATURE ON THE THERMAL PERFORMANCE OF A HEAT EXCHANGER 2016;2:583–92.
• [9] Asadi M, Khoshkhoo RH. Effects of mass flow rate in terms of pressure drop and heat transfer characteristics 2013;1:5–11.
• [10] Panthee P. Testing and Characterising the Performance of Heat Exchangers 2017.
• [11] Dewatwal J. DESIGN OF COMPACT PLATE FIN HEAT EXCHANGER. National Institute of Technology Rourkela, 2009.
• [12] Aral MC, Ho M, Suhermanto M. Heat Transfer Modelling of a Parallel Flow Micro Channel / Louvered Fin Condenser Using Refrigerants R134a and R1234yf n.d.:1–11.
• [13] Kakaç, Sadik; Liu, Hongtan; Pramuanjaroenkij A. HEAT EXCHANGERS 3rd Edition. CRC Press, Taylor & Francis Group; 2012.
• [14] Javaherdeh K, Vaisi A, Moosavi R. The effects of fin height , fin-tube contact thickness and louver length on the performance of a compact fin-and-tube heat exchanger 2018;36:825–34.