Full Report 2.pdf - CHAPTER 1 INTRODUCTION 1.1 Background of Experiment Generally cooling tower is a heat removal device that rejects waste heat to the

Full Report 2.pdf - CHAPTER 1 INTRODUCTION 1.1 Background...

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1 CHAPTER 1 INTRODUCTION 1.1 Background of Experiment Generally, cooling tower is a heat removal device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Cooling tower may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or, in the case of closed circuit dry cooling towers, rely solely on air to cool the working fluid to near the dry-bulb air temperature. The laboratory cooling tower is a cooling tower unit that used to study the principles of cooling tower operation. It is used in conjunction with a residential size water heater to simulate a cooling tower used to provide cool water to an industrial process. However, in the case of laboratory unit, the water heater provides the cooling tower process load. In addition, laboratory cooling tower allows for complete control of the speed of the fan used in cooling the warm return water, the initial temperature of water heater that needed to be cooled and the water and the feed flowrate on the cooling tower performance. Experiment can be conducted by adjusting either three or just two of these parameters, which affected the amount of heat removal form water provided to the water heater. In this case, only speed of the fan used and initial temperature of water heater will be investigated to determine the affect towards the amount of heat removal and effectiveness of the system.
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2 1.2 Problem Statement In this experiment, the working principle of cooling tower is needed to be study. 1.3 Objectives of Experiment Basically, there are three objectives of the experiment as follows: i) To investigate the effect of fan speed and initial temperature on the cooling tower performance. ii) To determine the waterside actual cooling load (kW) and energy (J/s) produced. iii) To obtain the value of k G a. 1.4 Scope of Experiment In this experiment, the scope is to investigate the principles of cooling process of cooling tower system based on the different of fan speed and water heater temperature. For each of different fan speed and water heat supplied to the system, need to further study the characteristics of effect toward the temperature of the system. 1.5 Significant of Experiment This experiment is very important because in industrial cooling towers can be used to remove heat from various sources such as machinery or heated process material. The primary use of large, industrial cooling tower is to remove the heat absorbed in the circulating cooling water systems used in power plant, petroleum refineries, petrochemical plants, natural gas processing plants, food processing plants, semi-conductor plants, and for other industrial facilities such as in condensers of distillation columns, for cooling liquid in crystallization and others. A cooling tower serves to dissipate the heat into the
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3 atmosphere instead and wind and air diffusion spreads the heat over a much larger area than hot water can distribute heat in a body of water. Some coal-fired and nuclear power
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  • Spring '19
  • Halieza

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