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ThesisItem Open Access Experimental investigation of thermo- hydraulic performance of rotating packed bed using air-water System(G. B. Pant University of Agriculture and Technology, Pantnagar, 2022-04) Sandeep Kumar; Murthy, D. S.Rotating packed bed (RPB) has a great potential for process intensification in thermal systems. However, the available literature is only focused on its mass transfer aspects and no study shows its heat transfer aspects. In rotating packed bed, the water flows outwards from the inner eriphery of a rotating rotor by centrifugal action and air travels inwards from the outer periphery by imposed pressure gradient making a counter current interaction with each other. The rotation of the rotor gives control over the water distribution unlike in conventional columns where gravity is the only driving force. In present work, rotating packed bed (RPB) have been explored for process intensification in thermal systems using air-water as working fluids. The thermo-hydraulic performance of rotating packed was carried out considering the air flow rate range varying from 0.007625 kg/s to 0.020175 kg/s, water flow rate varies from 0.033 kg/s to 0.133 kg/s and rotational speed considered is 0-2000 rpm. The thermal performance parameters such as cooling range, approach, water evaporation rate, heat transfer rate, Merkel number, and effectiveness for the RBP were experimentally evaluated for the given airflow rate, water flow rate and water inlet temperature (35, 40, and 45°C) and rotational speed. The optimum result for all the thermal performance parameters was observed at 1200 rpm. At the optimum condition, the observed value of cooling range was 15 ̊C, the value of approach was 12.2 ̊C, water evaporation rate was 0.000904 kg/s, effectiveness was 0.49 and the Merkel number was 0.426. The results were found to be in agreement with CTI (Cooling Technology Institute) performance curve charts, confirming the feasibility of RPBs to be used as thermal systems.ThesisItem Open Access Experimental investigation of thermo-hydraulic performance of rotating packed bed using air-water system(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2022-04) Sandeep Kumar; Murthy, D.S.Rotating packed bed (RPB) has a great potential for process intensification in thermal systems. However, the available literature is only focused on its mass transfer aspects and no study shows its heat transfer aspects. In rotating packed bed, the water flows outwards from the inner periphery of a rotating rotor by centrifugal action and air travels inwards from the outer periphery by imposed pressure gradient making a counter current interaction with each other. The rotation of the rotor gives control over the water distribution unlike in conventional columns where gravity is the only driving force. In present work, rotating packed bed (RPB) have been explored for process intensification in thermal systems using air-water as working fluids. The thermo-hydraulic performance of rotating packed was carried out considering the air flow rate range varying from 0.007625 kg/s to 0.020175 kg/s, water flow rate varies from 0.033 kg/s to 0.133 kg/s and rotational speed considered is 0-2000 rpm. The thermal performance parameters such as cooling range, approach, water evaporation rate, heat transfer rate, Merkel number, and effectiveness for the RBP were experimentally evaluated for the given airflow rate, water flow rate and water inlet temperature (35, 40, and 45°C) and rotational speed. The optimum result for all the thermal performance parameters was observed at 1200 rpm. At the optimum condition, the observed value of cooling range was 15 ̊C, the value of approach was 12.2 ̊C, water evaporation rate was 0.000904 kg/s, effectiveness was 0.49 and the Merkel number was 0.426. The results were found to be in agreement with CTI (Cooling Technology Institute) performance curve charts, confirming the feasibility of RPBs to be used as thermal systems.
