## THERMAL SCIENCE

International Scientific Journal

### Thermal Science - Online First

online first only
### An analytical model on thermal performance evaluation of counter flow wet cooling tower

**ABSTRACT**

This paper proposes an analytical model for simultaneous heat and mass transfer processes in a counter flow wet cooling tower, with the assumption that the enthalpy of the saturated air is a linear function of the water surface temperature. The performance of the proposed analytical model is validated in some typical cases. The validation reveals that, when cooling range is in a certain interval, the proposed model is not only comparable with the accurate model, but also can reduce computational complexity. In addition, with the proposed analytical model, the thermal performance of the counter flow wet cooling towers in power plants is calculated. The results show that the proposed analytical model can be applied to evaluate and predict the thermal performance of counter flow wet cooling towers.

**KEYWORDS**

PAPER SUBMITTED: 2015-07-16

PAPER REVISED: 2016-05-09

PAPER ACCEPTED: 2016-05-11

PUBLISHED ONLINE: 2016-05-30

- Merkel F., Evaporative cooling. VDI-Zeitchrift, 70(1925), pp.123-128.
- Lemouari M., et al., Experimental analysis of heat and mass transfer phenomena in a direct contact evaporative cooling tower, Energy conversion and management, 50( 2009),6, pp.1610-1617.
- Lemouari M., Boumaza M., Experimental investigation of the performance characteristics of a counterflow wet cooling tower, International Journal of Thermal Sciences, 49(2010),10, pp.2049-2056.
- Gharagheizi F., et al., Experimental study on the performance of mechanical cooling tower with two types of film packing, Energy conversion and management, 48(2007), 1, pp.277-280.
- Simpson W. M., Sherwood T. K., Performance of small mechanical draft cooling towers, Refrigerating Engineering, 52 (1946), 6, pp.525-543.
- Wang W. et al., Coupling model and solving approach for performance evaluation of natural draft counter-flow wet cooling towers, Thermal Science, 00(2015), pp.6-6.
- Nasrabadi M., Finn D. P., Performance analysis of a low approach low temperature direct cooling tower for high-temperature building cooling systems, Energy and Buildings, 84(2014), pp.674-689.
- Jaber H., Webb R. L., Design of cooling towers by the effectiveness-NTU method, Journal of heat transfer, 111(1989), 4, pp.837-843.
- Saravanan M., et al., Energy and exergy analysis of counter flow wet cooling towers, Thermal Science, 12(2008), 2, pp.69-78.
- Kloppers J. C., Kröger D. G., Cooling tower performance evaluation: Merkel, Poppe, and e-NTU methods of analysis, Journal of engineering for gas turbines and power, 127(2005), 1, pp.1-7.
- Kloppers J. C., Kröger D. G., A critical investigation into the heat and mass transfer analysis of counterflow wet-cooling towers, International Journal of Heat and Mass Transfer, 48(2005), 3, pp.765-777.
- Fisenko S. P., et al., Evaporative cooling of water in a natural draft cooling tower, International Journal of Heat and Mass Transfer, 45(2002), 23, pp.4683-4694.
- Zhang Q., et al., Calculations on performance characteristics of counterflow reversibly used cooling towers, International journal of refrigeration, 35(2012), 2, pp.424-433.
- Yaqub M., Zubair S. M., Performance characteristics of counter flow wet cooling towers, Energy conversion and management, 44(2003),13, pp.2073-2091.
- El-Dessouky H. T. A., et al., A modified analysis of counter flow wet cooling towers, Journal of heat transfer, 119(1997), 3, pp.617-626.
- Picardo J. R., Variyar J. E., The Merkel equation revisited: A novel method to compute the packed height of a cooling tower, Energy Conversion and Management, 57(2012), pp.167-172.
- Asvapoositkul W., Treeutok S., A simplified method on thermal performance capacity evaluation of counter flow cooling tower, Applied Thermal Engineering, 38(2012), pp.160-167.
- Ren C., An analytical approach to the heat and mass transfer processes in counterflow cooling towers, Journal of heat transfer, 128(2006), 11, pp.1142-1148.
- Halasz B., Application of a general non-dimensional mathematical model to cooling towers, International journal of thermal sciences, 38(1999), 1, pp.75-88.
- Halasz B., A general mathematical model of evaporative cooling devices, General Thermal Review, 37(1998), 4, pp.245-255.
- Makkinejad N., Temperature profile in countercurrent/cocurrent spray towers, International journal of heat and mass transfer, 44(2000), 2, pp.429-442.
- Hasan A., Going below the wet-bulb temperature by indirect evaporative cooling: Analysis using a modified ε-NTU method, Applied Energy, 89(2012), 1, pp.237-245.
- Serna-González M., et al., MINLP optimization of mechanical draft counter flow wet-cooling towers, Chemical Engineering Research and Design, 88(2010), 5, pp.614-625.
- Poppe M., Heat and Mass Transfer in the evaporative cooling via counterflow and crossflow, VDI-Verlag, Hannover, Germany, 1973.