Performance analysis of counter flow cooling tower using reciprocating desiccant mesh
- PDF / 2,441,323 Bytes
- 21 Pages / 595.276 x 790.866 pts Page_size
- 3 Downloads / 207 Views
ORIGINAL
Performance analysis of counter flow cooling tower using reciprocating desiccant mesh Sanjay 1 & Ashutosh Kumar Verma 2 & Amarjeet Kumar Prasad 1 & Laxmikant Yadav 2
&
Avadhesh Yadav 3
Received: 29 March 2020 / Accepted: 30 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In hot and humid climates, the evaporative cooling system not works effectively. To reduce the relative humidity of inlet air, the reciprocating desiccant mesh (RDM) is introduced before the cooling tower. The cooling tower is fabricated as per the Merkel’s theory and RDM is placed before the cooling tower. Experiments have been conducted to compare the performance of normal and RDM cooling towers at different operating conditions. The results of this study indicate that the most favorable velocity and water flow rate of the RDM cooling tower are 1.8 m/s and 17.3 L/min, respectively. At this condition, the cooling effect of the RDM cooling tower is 1.6°C greater than the normal cooling tower. Further, the maximum effectiveness of normal and RDM cooling tower are 0.72 and 0.82, respectively. At last, this study recommends that the RDM cooling tower reduces water consumption as compared to the normal cooling tower due to the lower temperature of cold water. Abbreviations RH Relative humidity RDM Reciprocating desiccant WBT Wet-bulb temperature DBT Dry bulb temperature ETC Evacuated tube collector EF Exhaust fan DE Drift Eliminator Nomenclature Symbol Description wr Resultant uncertainty ˙ G Mass flow rate of air in cooling ˙ W Mass flow rate of liquid water in cooling tower TG2 Temperature of air at the exit of cooling tower
TG1 TW2 TW1 0
Y2 0
Y1 Units – kg/s kg/s °C
Ysat H2 H1 HW1 HW2
* Laxmikant Yadav [email protected] 1
Department of Mechanical Engineering, MMMUT, Gorakhpur, India
2
Department of Mechanical Engineering, NIT, Hamirpur, India
3
Department of Mechanical Engineering, NIT, Kurukshetra, Haryana, India
cwl cpg ΔHvap Cmin ky a hc
Temperature of air at the inlet of cooling tower °C Temperature of water at the exit of cooling tower °C Temperature of water at the inlet of cooling tower °C Humidity ratio of air at the exit of cooling tower kg/kg Humidity ratio of air at the inlet of cooling tower kg/kg Humidity ratio at saturated condition kg/kg Enthalpy of air at the exit of cooling tower kJ/kg Enthalpy of air at the inlet of cooling tower kJ/kg Enthalpy of water at the inlet of cooling tower kJ/kg Enthalpy of water at the exit of cooling tower kJ/kg Specific heat of liquid water kJ/kg K Specific heat of air kJ/kg K Enthalpy of vapourization kJ/kg Minimum heat capacity KJ/K Mass transfer coefficient kg/m2s Perimeter of control volume dz m Convective heat transfer coefficient W/m2K
Heat Mass Transfer
˙ cwr m ρavg. water E˙ Htg Ntg z Hsat ˙s m pcond ΔTmax
Mass flow rate of water consumed in the condenser Average density of water Evaporation loss Height of enthalpy gas transfer unitv Number of enthalpy gas transfer unit Height of packing sectionm Enthalpy of air at the sa
Data Loading...
