Experimental and Theoretical Study for a Counter Flow Water Cooling Tower by Using (clear P.V.C.) Packing | ||
| journal of kerbala university | ||
| Article 1, Volume 8, Issue 1, May 2012, Pages 27-39 PDF (0 K) | ||
| Author | ||
| Hayder J.Kurji | ||
| Abstract | ||
| In this paper we study the performance of a counter flow water cooling tower by employing (clear PVC ) packing with inclined 45o from the vertical axis. For different flow rate of water the cooling load are studied experimentally and theoretically .It is found that an increase in water flow rate leads to a decrease in cooling range, whereas when the water flow rate was (0.3kg/s) the cooling range was (11 Co) and when the water flow rate was (0.5kg/s) the cooling range was (6 Co).Four different packing heights (0.12, 0.24, 0.36 , 0.48)m are tested by varying the air flow rates, and the water flow rates in three steps for each of the four packing heights, it is observed that the number of transfer units (performance coefficient) (NTU) or (KaV/L) increases by increasing air flow rate. The relation of NTU with (L/G) (water flow rate per unit area to air flow rate per unit area) are studied experimentally and theoretically. Moreover, the calculation for (KaV/L) is theoretically computed by using Tchebycheff method, and the least square method is used to correlate the experimental results for NTU in terms of (L/G). We conclude that best performance for tower packing is represented in providing minimum water to air ratio (L/G),where it is noticed that when the air flow rate per unit area constant then the NTU reaches to 1.9 with (L/G) equals 0.435 and NTU reaches to 0.42 with ( L/G) equals 0.87.We also conclude that when the inlet water temperature increases the (NTU) decreases and vice versa. The experimental results obtained in this paper reasonably agree with the theoretical results. | ||
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