A number of researchers have developed other mathematical
models for open type cooling towers, notably Khan and Zubair
[9,16], Naphon [20] and Li et al. [21]. Khan and Zubair [16] describe
a mathematical model of an open counter flow cooling tower for
analysing heat and mass transfer when the Lewis factor is equal to
0.9 and NTU is estimated by means of an empirical equation based
on a correlated measurements of Simpson and Sherwood [22]. It is
noted that the majority of heat transfer (more than 60%) is due to
latent heat transfer in this kind of cooling tower for conditions
where the entering dry bulb and wet bulb temperatures were 29 C
and 21.1 C, respectively and the inlet water temperature was
28.7 C. The model was validated against experimental data to
within 7% [16]. Naphon [20] presents a mathematical model of a
direct contact counter flow open counter flow cooling tower using
an iterative solution method based on an approach described by
Khan and Zubair [9]. The predicted results were validated against
experimental data. It was shown that a 10% difference existed
between the modeled and measured data for outlet temperatures
of water and air, when the inlet air is 23 C and the tower inlet
water temperature was between 30 C and 40 C. Li et al. [21]
proposed a dynamic model of mechanical draft counter flow wet
cooling tower based on finite volume method. In this model, the
Lewis factor is estimated based on the Bosnjakovic relation and also
the water loss is estimated using a mass transfer analysis.
A number of researchers have developed other mathematical
models for open type cooling towers, notably Khan and Zubair
[9,16], Naphon [20] and Li et al. [21]. Khan and Zubair [16] describe
a mathematical model of an open counter flow cooling tower for
analysing heat and mass transfer when the Lewis factor is equal to
0.9 and NTU is estimated by means of an empirical equation based
on a correlated measurements of Simpson and Sherwood [22]. It is
noted that the majority of heat transfer (more than 60%) is due to
latent heat transfer in this kind of cooling tower for conditions
where the entering dry bulb and wet bulb temperatures were 29 C
and 21.1 C, respectively and the inlet water temperature was
28.7 C. The model was validated against experimental data to
within 7% [16]. Naphon [20] presents a mathematical model of a
direct contact counter flow open counter flow cooling tower using
an iterative solution method based on an approach described by
Khan and Zubair [9]. The predicted results were validated against
experimental data. It was shown that a 10% difference existed
between the modeled and measured data for outlet temperatures
of water and air, when the inlet air is 23 C and the tower inlet
water temperature was between 30 C and 40 C. Li et al. [21]
proposed a dynamic model of mechanical draft counter flow wet
cooling tower based on finite volume method. In this model, the
Lewis factor is estimated based on the Bosnjakovic relation and also
the water loss is estimated using a mass transfer analysis.
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