## THERMAL SCIENCE

International Scientific Journal

### Thermal Science - Online First

online first only
### Thermoeconomic analysis of spiral heat exchanger with constant wall temperature

**ABSTRACT**

Thermo-economic analysis of spiral heat exchanger (SHE) is conducted. Different geometrical parameters, such as outer diameter, plate height, passage gap, etc. are used and varied in a wide range. Detailed thermal and total costs analyses were performed for two SHE with different process fluids (water and thermal oil) with temperature changes, while the wall temperature was kept constant (condensation). The results were shown graphically. It is determined that optimum values of number of entropy generation units correspond to minimum total annual cost. The optimal solution could be found in the recommended range of geometric sizes for defined inlet and outlet temperatures and process fluid flow rate.

**KEYWORDS**

PAPER SUBMITTED: 2017-06-05

PAPER REVISED: 2017-10-31

PAPER ACCEPTED: 2017-11-06

PUBLISHED ONLINE: 2018-05-13

- Burley, P., Foster, J., Economics and Thermodynamics - New Perspectives on Economic Analysis, Kluwer Academic Publishers, ISBN 0-7923-9446-1, 1994
- Valero, A., Torres, T., Exergy, energy system analysis and optimization, vol. 2. Thermoeconomic Analysis, EOLSS publisher, Oxford, UK, 2006
- Maheshwari, G., Patel, S.S., The Application of Entransy Dissipation Theory on the Performance Analysis of an Irreversible Atkinson Cycle, Universal Journal of Mechanical Engineering, 1 (2013), 4, pp. 114-121,
- Xu, M.T., Entransy dissipation theory and its application in heat transfer, Shandong University, P.R. China, Developments in Heat Transfer, Edited by Dr. Marco Aurelio Dos Santos Bernardes ISBN 978-953-307-569-3, Publisher InTech, published online, 2011
- McClintock, F. A., The design of heat exchangers for minimum irreversibility. ASME Paper, No. 51-A-108, (1951), presented at the ASME Annual Meeting
- Bejan, A., Entropy Generation through Heat and Fluid Flow, Wiley, New York, 1982
- Bejan, A., Advanced Engineering Thermodynamics, Wiley, New York, 1988
- Bejan, A., Entropy Generation Minimization, CRC Press, New York, 1995
- Bejan, A., Entropy generation minimization: the new thermodynamics of finite-size devices and finite-time processes, J Appl Phys, 79, (1996), pp.1191-1218
- Bertola, V., Cafaro, E., A critical analysis of the minimum entropy production theorem and its application to heat and fluid flow. Int J Heat Mass Transfer, 51, (2008), pp.1907-1912,
- Hesselgreaves, J.E., Rationalisation of second law analysis of heat exchanger. Int. J.Heat Mass Transfer, 43, (2000), pp. 4189-4204
- Ahmadi, P., et al., Cost and entropy generation minimization of a cross-flow plate fin heat exchanger using multi-objective genetic algorithm, J. Heat Transfer, 133, (2011), 2, pp. 021801-10
- Nag, P.K., Mukherjee, P., Thermodynamic optimization of convective heat transfer through a duct with constant wall temperature, International Journal of Heat and Mass Transfer,. 30, (1987), 2, pp. 401-405
- Bermejo, P., et al., Modeling of a Microchannel Evaporator for Space Electronics Cooling: Entropy Generation Minimization Approach, Heat Transfer Engineering, 34, (2013), 4, pp. 303-312
- Zhou, Y., et al., Optimization of plate-fin heat exchanger by minimizing specific entropy generation rate, International Journal of Heat and Mass Transfer, 78, (2014), pp. 942-946
- Nguyen, D.K., San, J.Y., Heat Transfer and Exergy Analysis of a Spiral Heat Exchanger, Heat Transfer Engineering, 37, (2016), 12, pp. 1521-0537
- Kaushik, S.C., Manjunath, K., Entropy generation and thermoeconomic analysis of wire-and-tube condenser, International Journal of Ambient Energy, 35, (2013), 2
- Melhem, O., et al., Entropy generation due to external fluid flow and heat transfer from a cylinder between parallel planes, Thermal Science, 21, (2017), 2, pp. 841-848
- Pourmahmoud, N., et al., The effects of longitudinal ribs on entropy generation for laminar forced convection in a micro-channel, Thermal Science, 20, (2016), 6, pp. 1963-1972
- Jaćimović, B., Genić, S.: Heat transfer operations and equipment (in Serbian language), Publisher Faculty of Mechanical engineering, Belgrade, Serbia, 2002
- Holger, M., Heat exchangers, Hemisphere Publishing Corporation, London, 1992
- Minton, P. E., Designing Spiral Heat Exchangers, Chemical Engineering, (1970), pp. 103-112
- Saravanan, K., Rajavael, R., An Experimental Investigation of Heat Transfer Coefficients for Spiral Plate Heat Exchanger, Modern Applied Science, 2, (2008), 5, pp. 14-20
- Garcia, M.M., Moreles, M.A., A Numerical Method for Rating Thermal Performance in Spiral Heat Exchangers, Modern Applied Science, 6, (2012), 6, pp. 54-63
- Guo, J., et al., Optimization design of shell-and-tube heat exchanger by entropy generation minimization and genetic algorithm, Applied Thermal Engineering, 29, (2009), pp. 2954-2960
- Yilmaz, M., et al., Performance evaluation criteria for heat exchangers based on second law analysis, Exergy - An International Journal, 1, (2001), 4, pp. 278-294
- Loh, H.P., et al., Process Equipment Cost Estimation-Final Report, DOE/NETL-2002/1169, 2002
- Seider, W. D., et al., Product and Process Design Principles: Synthesis, Analysis, and Evaluation, Wiley, New York, 2004
- Genić S., et al., Properties of process fluids (in Serbian language), SMEITS, Belgrade, Serbia, 2014