Specific humidity of a kilogram of air at average sea level pressure 13

viii LIST OF TABLES

2.1 Specific humidity of a kilogram of air at average sea level pressure 13

3.1 Estimation cost for the project 40 ix LIST OF FIGURES 2.1 Different types of tumbler dryers 8 2.2 Conventional air vented dryer 9 2.3 Closed- air cycle heat pump dryer 10 2.4 Amount of water in air at 100 relative humidity across a Range of temperatures 14 2.5 Solar collector panel 15 2.6 Fan law impacts on air flow in AC condenser 16 3.1 Flow chart 18 3.2 Body of original dryer model 21 3.3 Marking process on galvanized metal 21 3.4 Cutting process by using shear machine 22 3.5 Bending process 22 3.6 Making a hole for a stove by using vertical drilling machine 23 3.7 Assembling process 23 3.8 Cutting side and top of cupboard to make a hole for airflow purposes 24 3.9 100 of cupboard body is done assembled 24 3.10 Gas stove is place at the bottom of cupboard 25 3.11 Weight balance is placed at the top of cupboard 25 3.12 Hanger bar and hanger is placed inside the cupboard 26 3.13 Complete assemble of original dryer model 27 3.14 Isometric view of an original dryer model 28 3.15 Basic component of using the cupboard 30 3.16 Recording data procedure for cotton clothes drying process 34 3.17 Recording data procedure for jeans trousers drying process 36 4.1 Air temperature inside cupboard during minimum, medium and 39 maximum flow rate of gas stove during unviability of air flow. x 4.2 Air temperature inside cupboard during minimum, medium and 40 maximum flow rate of gas stove during availability of air flow at second inlet and outlet of air flow. 4.3 Air temperature inside cupboard during minimum, medium and 42 maximum flow rate of gas stove during availability of air flow at first inlet and outlet of air flow. 4.4 Air temperature inside cupboard during minimum, medium and 43 maximum flow rate of gas stove during availability of all inlet and outlet of air flow 4.5 Clothes weight vs Time interval graph minimum 46 4.6 Clothes weight vs Time interval graph medium 48 4.7 Clothes weight vs Time interval graph maximum 50 4.8 Clothes weight vs Temperature during maximum flow rate of gas 51 4.9 Clothes drying rate vs Temperature during maximum flow rate of gas 52 4.10 Clothes weight vs drying rate during maximum flow rate of gas 53 4.11 Jeans trouser weight vs Time interval graph maximum 54 4.12 Drying rate vs Temperature during maximum flow rate of gas 55 4.13 Jeans weight vs Temperature during maximum flow rate of gas 56 4.14 Jeans weight vs drying rate during maximum flow rate of gas 57 xi LIST OF ABBREVIATIONS AND NOMENCLATURE ̇ - Gas mass flow rate ∆T air - Air temperature difference °C - Celcius Cp - Air constant pressure 1.6794kJkg Dr - Drying rate g - Gram Gc - Gas cost HTF - Heat Transfer Fluid IEA - International Energy Agency kg - kilogram kJ - kilojoule kW - Kilowatt Max - Maximum flow rate Med - Medium flow rate MEPS - Minimum Energy Performance Standards min - Minutes Min - Minimum flow rate xii Q gas - Energy input from gas s - Second T avg - Average air temperature T i - Initial temperature W - Watt W i - Initial weight clothes, jeans and propane gas W o - Final weight clothes, jeans and propane gas 1 In this chapter, introduction of the most important topics that involves background, problems statement, objectives, scope of the project is provided and the thesis organization of overall chapters is provided within the chapter.

1.1 Background