ANALISIS PERFORMANSI MENARA PENDINGIN TIPE INDUCED DRAFT COUNTER FLOW

ADMIRAL, DYLAN and Marwani, Marwani (2016) ANALISIS PERFORMANSI MENARA PENDINGIN TIPE INDUCED DRAFT COUNTER FLOW. Undergraduate thesis, Sriwijaya university.

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Abstract

The purpose of this research i s to analyse the performance of induced draft counter flow cooling tower. Induced draft counter flow cooling tower is a cooling tower which the fan is on the top of the tower, that used to suck air from the environment. Fan is used to force the convection heat transfer between the water entering the cooling tower and the air that sucked into the cooling tower The air that goes into the tower will receive heat from the sprayed water causing heat transfer from water to air. The analysis is done by comparing the design condition with actual condition. Cooling tower consists of nine cell, each cell has 1 fan installation. Cooling water produced by the cooling tower will be channeled towards three process units namely Plant Ammonia, Urea Plant and Utility Plant. After the water passes through the process units and increased temperatures, the water will be retumed to the cooling tower to be cooled back. The cooling towers are also supplied by Demin Plant to cover losses due to water evaporation occurs in the cooling tower. After collecting data, known in design condition, cooling tower is operated at a flow rate of 26650 m3/h, while the flow rate at actual condition is 22286.44 mJ/h. The decline occurred in almost all performance parameters of the cooling tower. In conditions design, water temperature entering the cooling tower at 45.5°C and the outlet water temperature at 32°C. While on the actual temperature of water entering the cooling tower at 37.44°C and outlet water temperature at 30.92°C. This resulted in the decrease of temperature range from 13.5°C to 6.52°C, while the temperature approach dropped from 4°C to 3.42°C. The effectiveness of the cooling tower at design conditions is 77.14% and decreased by 11.55% to 65.59% from the design condition. Total heat load of cooling towers also decreased from 414219.441 kJ/s to 167574.304 kJ/s, this proves that the workload of the actual condition of the cooling tower is lighter than the design conditions. Heat load of the cooling tower is affected by the water flow rate and inlet temperature of cooling tower. Decrease in make up water flow rate due to the actual flow rate and evaporation loss. The rate of make up water flow decrease from 581.553 m3/h to 374.55 m3/h on the actual condition. Key Words : cooling tower, flow rate, water, air, effectivity, make up water Citations : 15 (2005-2016)

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	menara pendingin, laju aliran, air, udara, efektifitas, air pengganti
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1040-1119 Machinery exclusive of prime movers > TJ1073.5.B38 Fluid-film bearings.
Divisions:	03-Faculty of Engineering > 21201-Mechanical Engineering (S1)
Depositing User:	Ichlasyah Aisyah
Date Deposited:	09 Sep 2025 07:56
Last Modified:	09 Sep 2025 07:56
URI:	http://repository.unsri.ac.id/id/eprint/183771

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