Design, fabrication, testing, and optimization of an evaporative cooling pad made of coconut (Cocos nucifera L.) twine

Date

6-2015

Degree

Bachelor of Science in Agricultural and Biosystems Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Kevin F. Yaptenco

Abstract

This study developed a new design of evaporative cooling pad made of coconut twine. A wind-tunnel setup evaluated the performance of the cooling pad. Using Box and Behnken design of experiment, laid out the order of trials that aided in determining the optimum operating conditions. The experiments used design variables of layers of the cooling pad (2, 4, 6), air velocity (1.0, 1.2, 1.4 m/s), and cooling pad thickness (10, 15, 20 cm). Response surface regression statistical analysis via desirability functions pointed to the optimum operating condition at two layers of cooling pad, 1.0 m/s air velocity, and 20 cm pad thickness with 62.02 % saturation efficiency and pressure loss of 83.06 Pa. A temperature drop of 2.15 degree Celsius and an increase of 14.58 % relative humidity between the cooling pads occured at these operating conditions with mass transfer coefficient of 21.21 kgw per (s-m2-kgw per kga). The total fabrication cost of coconut twine cooling pad is Php 152.55/m2. Assuming that the operating cist is the same with commercially available cellulosic pads and the coconut twine cooling pads, the fabrication cost of the coconut cooling twine is cheaper than the selling price of the commercially available cellulosic pads by Php 520/m2. For easier fabrication, a new machine can be developed to construct the cylindrical shape of the coconut twine cooling pad. And, the crisscross pattern is the recommended twining of coconut twine for easier air flow.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2015 A2 /B35

Document Type

Thesis

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