The Design Of Portable Hexagon Chicken Brooder That Provide Best Thermal Comfort For The Chicks.
UNIVERSITI TEKNIKAL MALAYSIA MELAKA
THE DESIGN OF PORTABLE HEXAGON CHICKEN BROODER
THAT PROVIDE BEST THERMAL COMFORT FOR THE
CHICKS
This report submitted in accordance with requirement of the Universiti Teknikal Malaysia Melaka (UTeM) for the Bachelor of mechanical Engineering Technology
(Refrigeration and Air-Conditioning System) (Hons.)
By
MUHAMAD FADHIL BIN JAMALUDIN B071210410
930627-08-5433
FACULTY OF ENGINEERING TECHNOLOGY 2015
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UNIVERSITI TEKNIKAL MALAYSIA MELAKA
BORANG PENGESAHAN STATUS LAPORAN PROJEK SARJANA MUDA TAJUK: The Design Of Portable Hexagon Chicken Brooder That Provide Best Thermal Comfort For The Chicks.
SESI PENGAJIAN: 2015/2016 Semester 1 Saya MUHAMAD FADHIL BIN JAMALUDIN
mengaku membenarkan Laporan PSM ini disimpan di Perpustakaan Universiti Teknikal Malaysia Melaka (UTeM) dengan syarat-syarat kegunaan seperti berikut: 1. Laporan PSM adalah hak milik Universiti Teknikal Malaysia Melaka dan penulis. 2. Perpustakaan Universiti Teknikal Malaysia Melaka dibenarkan membuat salinan
untuk tujuan pengajian sahaja dengan izin penulis.
3. Perpustakaan dibenarkan membuat salinan laporan PSM ini sebagai bahan pertukaran antara institusi pengajian tinggi.
4. **Sila tandakan ( )
SULIT
TERHAD
TIDAK TERHAD
(Mengandungi maklumat yang berdarjah keselamatan atau kepentingan Malaysia sebagaimana yang termaktub dalam AKTA RAHSIA RASMI 1972)
(Mengandungi maklumat TERHAD yang telah ditentukan oleh organisasi/badan di mana penyelidikan dijalankan)
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FAKULTI TEKNOLOGI KEJURUTERAAN Tel : +606 234 6623 | Faks : +606 23406526
Rujukan Kami (Our Ref) : Rujukan Tuan (Your Ref) :
28 JAN 2015
Pustakawan
Perpustakaan UTeM
Universiti Teknikal Malaysia Melaka Hang Tuah Jaya,
76100 Durian Tunggal, Melaka.
Tuan/Puan,
PENGKELASAN LAPORAN PSM SEBAGAI SULIT/TERHAD LAPORAN PROJEK SARJANA MUDA TEKNOLOGI KEJURUTERAAN PEMBUATAN (COURSE NAME): AAA BIN BBB
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2. Hal ini adalah kerana IANYA MERUPAKAN PROJEK YANG DITAJA OLEH SYARIKAT LUAR DAN HASIL KAJIANNYA ADALAH SULIT.
Sekian dimaklumkan. Terima kasih.
Yang benar,
________________
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* Potong yang tidak berkenaan
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TERHAD, MAKA BORANG INI TIDAK PERLU DISERTAKAN DALAM LAPORAN PSM.
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iv
DECLARATION
I hereby, declared this report entitled “The Design of Portable Hexagon Chicken Brooder That Provide Best Thermal Comfort For The Chicks” is the results of my
own research except as cited in references.
Signature :………
Name : MUHAMAD FADHIL BIN JAMLUDIN Date :
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v
APPROVAL
This report is submitted to the Faculty of Engineering Technology of UTeM as a partial fulfillment of the requirements for the degree of Bachelor of mechanical Engineering Technology (Refrigeration and Air-Conditioning System) (Hons.). The member of the supervisory is as follow:
………. (Project Supervisor)
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vi
ABSTRACT
Chicken brooder is the place for the young chicks live for early periods of growth, when their normal body temperature cannot be maintained by its own body. Unique from most other animals, chicks are unable to live for any long time of periods because it dependent on others heat source to maintain optimal body temperature. There are several type of heating system used in chicken brooder or poultry houses which are force air furnace, natural brooder, radiant brooder, radiant tube heaters, high intensity radiant heaters and “alternative”heating systems. Moreover, the design of the brooder before cannot provide best thermal comfort for the baby chicks. The purpose of this study is to design portable hexagon chicken brooder that can provide best thermal comfort for the chicks. To achieve the objective and solving the problem before, different type of materials use. Other than that, the brightness of the lamp also can be control so that, the temperature of the chicken brooder can be controlled. Besides that, the behaviour of the chicks captured using digital camera so that, we can know whether baby chicks feel comfort or not. Lastly, it is expected that this design of the portable chicken brooder can provide best thermal comfort for the chicks.
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vii
ABSTRAK
“Chicken brooder” merupakan tempat untuk anak ayam yang baru dilahirkan dalam lingkungan (1-14 hari) apabila anak ayam tidak mampu untuk mengekalkan suhu yang diperlukan. Anak ayam merupakan binatang yang sangat unik daripada binatang-binatang lain kerana anak ayam tidak boleh hidup dalam jangka masa yang panjang jika anak ayam tidak dapat suhu yang diperlukan kerana anak ayam bergantung pada sumber haba yang lain untuk mengekalkan suhu badan yang optimum. Terdapat beberapa jenis sistem pemanasan yang digunakan untuk “chicken brooder” atau “poultry house” iaitu (“force air furnace”, “natural brooder”, “radiant brooder”, “radiant tube heater”, “high intensity radiant heater”, and “alternative heating”). Oleh sebab itu, reka bentuk untuk “brooder” yang ada di pasaran sekarang tidak mampu untuk memberikan keselesaan yang baik untuk anak ayam. Tujuan kajian ini dilakukan adalah untuk mereka bentuk “brooder” mudah alih yang boleh memberi keselesaan yang sempurna kepada anak ayam. Walaubagaimanapun, untuk mencapai objektif yang diinginkan pelbagai jenis bahan digunakan. Selain daripada itu, kecerahan lampu boleh diubah-ubah supaya suhu “brooder” boleh dikawal pada tahap yang diperlukan. Selain itu, pergerakan anak ayam dirakam menggunakan kamera digital supaya kita boleh tahu sama ada anak ayam berada dalam keaadaan selesa ataupun tidak. Akhir sekali, diharapkan agar “brooder house” ini dapat memberi keselesaan yang baik kepada anak ayam.
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viii
DEDICATIONS
Specially To my beloved parent To my kind brothers and sisters
To my kind lectures And not forgetting to all friends
For their
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ix
ACKNOWLEDGMENTS
Assalamualaikum Warahmatullah Wabarakatuh.
First and foremost, I praise Allah, the Almighty and Merciful for providing me this opportunity and granting me the capability to proceed and finish this report successfully. It is a pleasure to express my deepest appreciation to all those who made this project and report possible.
I would like to express my deepest sense of gratitude to Mr. Azwan bin Aziz, my esteemed supervisor. My cordial thanks to him for his invaluable supervision, warm encouragement, thoughtful guidance, insightful decision, and critical comments throughout the project. I could not have imagined having a better supervisor and mentor for my Bachelor Degree project.
My deepest thanks go to all lecturers who have taught me, directly or indirectly, for all these four years of studies. I will never forget all the precious knowledge learnt and gained insyaAllah.
To my beloved family, I would like to show my appreciation to them for the unwavering moral, emotional and financial support which they have given me consistently throughout my entire time spent in managing to complete this report.
Lastly, I want to thank my fellow friend and housemates who were there for me and also, for having the willingness to lend a helping hand in completing this project when I required certain assistance.
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x
TABLE OF CONTENTS
DECLARATION iv
APPROVAL v
ABSTRACT vi
ABSTRAK vii
DEDICATION vii
ACKNOWLEDGMENTS ix
TABLE OF CONTENTS x
LIST OF FIGURES xv
LIST OF TABLES xvii
LIST OF SYMBOLS AND ABBREVIATION xviii
CHAPTER 1: INTRODUCTION
1.0 Background of the study 1
1.1 Problem statement 2
1.2 Objectives of the research 2
1.3 Scope of research 3
CHAPTER 2: LITERATURE REVIEW
2.0 Introduction 4
2.1 Heat transfer 4
2.2 Modes of heat transfer 2.2.1 Conduction
5 5
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xi 2.2.2 Convection
2.2.3 Radiation
8 9 2.3 Parameter
2.3.1 Temperature 2.3.2 Relative humidity 2.3.3 Ventilation
11 11 14 15 2.4 Radiant brooder
2.4.1 Radiant heat 2.4.2 Radiant zone
16 17 18 CHAPTER 3: METHODOLOGY
3.0 Introduction 20
3.1 First milestone 21
3.2 Second milestone 22
3.3 Third milestone
3.3.1 Material for brooder body 3.3.1.1 Cardboard (4x3 ft.) 3.3.1.2 Superlon insulator 3.3.2 Heat sources
3.3.2.1 Philips 100W incandescent bulb. 3.3.2.2 Sheet metal
3.3.3 Bedding material
3.3.4 Food and water container 3.3.5 Material for adjustable stand 3.3.5.1 Pvc pipe and fitting
24 24 24 25 25 26 27 27 28 28 28
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xii 3.3.6 Material for brooder base
3.3.6.1 Half inch wood
3.3.6.2 Plastic wheel (YD-W153.W154) 3.3.6.3 Garden net and circular hole 3.3.6.4 Small engsel
3.3.7 Devised use to take data
3.3.7.1 Temperature and humidity meter 3.3.7.2 Digital camera
29 29 30 30 31 31 32 3.4 Fourth milestone
3.4.1 Procedure design development 3.4.2 Procedure to run experiment
33 33 42 CHAPTER 4: RESULT AND CONCLUSION
4.1 Introduction 43
4.2 Experiment 1 and 2 43
4.3
4.4
Result for experiment 1 (without bedding and chicks) 4.3.1 Calculation for average temperature
4.3.1.1 Average temperature for ambient
4.3.1.2 Average temperature for 50% brightness 4.3.1.3 Average temperature for 100% brightness 4.3.2 Calculation for average humidity level
4.3.2.1 Average humidity level for ambient
4.3.2.2 Average humidity level for 50% brightness 4.3.2.3 Average humidity level for 100% brightness Experiment 2 (with bedding and without chicks)
4.4.1 Calculation for average temperature
44 46 46 46 46 48 48 48 48 49 51
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xiii 4.5
4.6 4.7
4.8
4.4.1.2 Average temperature for 50% brightness 4.4.1.3 Average temperature for 100% brightness 4.4.2 Calculation for average humidity level
4.4.2.1 Average humidity level for ambient
4.4.2.2 Average humidity level for 50% brightness 4.4.2.3 Average humidity level for 100% brightness Temperature comparison of experiment 1 and 2
Humidity comparison of experiment 1 and 2 Experiment 3 (with bedding and chicks) 4.7.1 Calculation for average temperature 4.7.1.1 Average temperature for ambient
4.7.1.2 Average temperature for 50% brightness 4.7.1.3 Average temperature for 100% brightness 4.7.2 Calculation for average humidity level
4.7.2.1 Average humidity level for ambient
4.7.2.2 Average humidity level for 50% brightness 4.7.2.3 Average humidity level for 100% brightness Behaviour of chicks at different height
51 51 53 53 53 54 55 56 58 60 60 60 60 62 62 62 63 64 CHAPTER 5: CONCLUSION & RECOMMENDATION
5.1 Introduction 66
5.2 Summary of research 66
5.3 Achievement of research objectives 66
5.4 Significance of research 67
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xiv
5.6 Problems faced during research 67
5.7 Suggestion for future work 68
APPENDICES 69
APPENDIX A 70
APPENDIX B 71
APPENDIX C1 APPENDIX C2
72 73
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xv
Figure 2.1: Heat transfer diagram (Chris Long and Naser Layma 2009). ... 5
Figure 2.2: Diagram of conduction heat transfer (Chris Long and Naser Layma 2009)... 6
Figure 2.3: Diagram of convection heat transfer (Chris Long and Naser Layma 2009)... 8
Figure 2.4: Heat transfer by radiation (John H. Lienhard, 2003). ... 10
Figure 2.5: Diagram for unclosed radiation (John H. Lienhard, 2003)... 10
Figure 2.6: Temperature analysis diagram (Michael Czarick the University of Georgia) ... 13
Figure 2.7: Temperature analysis diagram (Michael Czarick the University of Georgia) ... 14
Figure 2.8: Diagram for radiant brooder (Michael Czarick 1991). ... 16
Figure 2.9: Thermal image for radiant brooder (Michael Czarick the University of . 17 Figure 2.10: Radiant heat diagram (Michael Czarick the University of ... 18
Figure 2.11: Radiant zone for radiant brooder (Michael Czarick the University of .. 19
Figure 3.1: Methodology of the flowchart ... 20
Figure 3.2: Literature review flow chart ... 21
Figure 3.3: Brooder design. ... 22
Figure 3.4: 3D draft drawing for brooder body. ... 23
Figure 3.5: Isometric draft drawing for brooder house. ... 23
Figure 3.6: Cardboard ... 24
Figure 3.7: Cardboard size ... 24
Figure 3.8: Superlon insulator ... 25
Figure 3.9: Radiant brooder design. ... 26
Figure 3.10: Incandescent bulb. ... 26
Figure 3.11: Sheet metal. ... 27
Figure 3.12: Saw dust ... 27
Figure 3.13: water and food container. ... 28
Figure 3.14: PVC pipe and fitting ... 29
Figure 3.15: Half inch wood ... 29
Figure 3.16: Plastic wheel (YD-W153.W154). ... 30
Figure 3.17: Garden net and fine circular hole net... 30
Figure 3.18: Joints ... 31
Figure 3.19: Meter specification ... 32
Figure 3.20: Temperature and humidity meter ... 32
Figure 3.21: Digital camera... 32
Figure 4.1: The graph of the temperature( ̊C) versus height(in) for Experiment 1 ... 45
Figure 4.2: The graph of the humidity(%) versus height(in) for Experiment 1 ... 47
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xvi
Figure 4.4: The graph of the humidity(%) height(in) for experiment 2... 52 Figure 4.5: The graph of temperature( ̊C) versus height(in) for experiment 1 and 2. ... 56 Figure 4.6: The graph of the humidity(%) versus height(in) for experiment 1 and 2 57 Figure 4.7: The graph of the temperature( ̊C) versus height(in) for experiment 3... 59 Figure 4.8: The graph of the humidity(%) versus height(in) for experiment 3... 61
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xvii
Table 2.1: Thermal conductivity and diffusivity for typical solid materials at room
temperature ... 7
Table 2.2: Correct brooding temperature (at chick height) for various ages. Gerry .. 11
Table 2.3: Recommended air temperature during brooding for broilers by heat source. Brian D. Fairchild (2009). ... 12
Table 2.4: Standard temperature and humidity for chicken brooder. Hendric genetic ... 15
Table 3.1: Step 1 design development for base of brooder ... 33
Table 3.2: Step 2 procedure to make the body of the brooder. ... 37
Table 3.3: Step 3 procedure to make the upper of the brooder. ... 39
Table 3.4: Step 4 procedure to make the adjustable lamp stand. ... 40
Table 3.5: Step 5 procedure to make the lamp cover and electrical part. ... 41
Table 4.1: Result for experiment 1(without bedding and chicks) ... 44
Table 4.2: Result for Experiment 2(with bedding and without chicks) ... 49
Table 4.3: Temperature comparision result for Experiment 1 and 2 ... 55
Table 4.4: Humidity comparision result for Experiment 1 and Experiment 2 ... 56
Table 4.5: Result for Experiment 3(with bedding and chicks) ... 58
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xviii
LIST OF SYMBOLS AND ABBREVIATIONS
Ft. = Feet
In = Inch
T = Temperature
H = humidity
UTeM = Universiti teknikal Malaysia melaka ̊C = Degree celcius
% = Percent
PE = Polyethylene PP = Polypropylene
PET = Polyethylene terephthalate PS = polystyrene
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1
CHAPTER 1
INTRODUCTION
1.0Background
Chicken brooder is the place for the young chicks live for early periods of growth, when their normal body temperature cannot be maintained by its own body. Unique from most other animals, chicks are unable to live for any long time of periods because it dependent on others heat source to maintain optimal body temperature. There are several type of heating system used in chicken brooder or poultry houses which are force air furnace, natural brooder, radiant brooder, radiant tube heaters, high intensity radiant heaters and “alternative”heating systems. Under natural brooder, brooder hen rears her own chicks using its own quill and it continues to cultivate the chicks through providing the needed warmth and protection against predators. Radiant brooder refers to some type of heated source enclosure for bringing up the baby chicks. Radiant brooders include a heat source, feeders and waterers, and bedding. Besides that, forced air furnaces is the most simplistic heating system where 100% of heat produced is the form of very hot air, since the hot air is significantly lighter than the rest of the air in the brooders. Radiant tube heater use propane or natural gas act as the sources for the combustion that place near the ceiling of the chicken brooders. Forced air heater can be combined with radiant tube heater as the sources of heat for the brooders
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2
Nowadays, chicken brooder is growly develop by many researcher with several type of heating system. Due to the brooder, the thermal comfort of the chicks depends on the design, heat source, and material use. Therefore, the heat source will provide heat to maintain the temperature required for the chicks in the brooder. Radiant brooders provide radiant heat and air heat that will provide thermal comfort for the chicks. Other than that, radiant brooder also cost effective for smaller design, easy to maintain and also the radiant heat directly warm the floor.
Therefore, based on the above statement the radiant brooders needed to be developed with the best type of material and design that capable to provide best thermal comfort for the chicks. All the consideration while develop this project will provide many advantages to the brooders. The improvement and novelty for the brooder will ensure that the brooder give best thermal comfort for the chicks
1.2Objectives of Research
The objectives of this project are as follows:
Main Objective:
To design portable hexagon chicken brooder that give best thermal comfort for chicks.
Specific Objectives:
1. To measure the humidity level and temperature in the brooder using temperature and humidity sensor.
2. To identify the behavior of chicks at different temperature.
3. To correlate association between design of portable chicken brooder with some of parameters.
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3
By narrowing the needs for this project, a few guidelines are proposed to ensure that this project will achieve its objectives. The scopes covered for this project are:
i. Design hexagon brooder that use radiant heat.
ii. Measuring temperature and humidity level using temperature and humidity sensor.
iii. Identified the behavior of chicks at certain temperature by captured or recorded using digital camera.
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4
CHAPTER 2
LITERATURE REVIEW
This chapter discusses about the articles related to this project. It is consists of the products that have been developed by institutions before this project. This chapter contains the theory and implementation of the components, equipment and programming language used in the previous project.
2.0 Introduction
Solomon Demeke (2012) stated that, chicken brooder is the place for the young chicks live for early periods of growth, when they are unable to maintain their normal body temperature. Other than that, Cora Cooke (1943) stated that brooder house must be capable on maintaining the desired brooding temperature under the different weather conditions. Besides, the place must be tightly constructed to prevent drafts, and must have floor that can be cleaned and disinfected readily. The lighting that is provided in the brooder must be necessary with the number of chicks so it will receive adequate light. There are several type of heating system used in the brooders or poultry house which are force air furnace, conventional brooder, radiant brooder, radiant tube heaters, high intensity radiant heaters and “alternative” heating systems.
2.1 Heat transfer
According to Chris Long and Naser Sayma (2009), energy may exist in two forms, such as heat or work. Heat is usually the level of thermal energy transferred over a good time frame interval. Heat is said to be transferred, when it crosses the boundary. It is said to be natural that heat always flows from high temperature to the
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5 temperature difference (gradient).
Figure 2.1: Heat transfer diagram (Chris Long and Naser Layma 2009).
Heat transfer is study on the rate at which heat is transfer, duration of heating or cooling for certain heat duty and surface area. Others, heat transfer also the thermal energy transport due to temperature different.
2.2 Modes of heat transfer
There are three fundamental type involving heat transfers which will be conduction, convection as well as radiation stated by Chris Long and Naser Layma (2009).
2.2.1 Conduction
Energy is actually transferred throughout the program boundary due to your temperature difference by the mechanism linked to intermolecular interactions. Conduction demands matter and does not demand any bulk of motion.
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6
Figure 2.2:Diagram of conduction heat transfer (Chris Long and Naser Layma 2009).
� = −�� ��=−��� −�∆�
The rate of heat transfer per unit area is linearly proportional to the normal temperature gradient.
When the proportionality constant is inserted, then
q is the heat transfer rate ( W )
k is a material thermal conductivity (w/m.K )
A is cross sectional area in the direction of heat flow ( � ) dT/dx is the temperature gradient in direction of heat flow ( K ) dx is the thickness ( m )
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1
CHAPTER 1
INTRODUCTION
1.0Background
Chicken brooder is the place for the young chicks live for early periods of growth, when their normal body temperature cannot be maintained by its own body. Unique from most other animals, chicks are unable to live for any long time of periods because it dependent on others heat source to maintain optimal body temperature. There are several type of heating system used in chicken brooder or poultry houses which are force air furnace, natural brooder, radiant brooder, radiant tube heaters, high intensity radiant heaters and “alternative”heating systems. Under natural brooder, brooder hen rears her own chicks using its own quill and it continues to cultivate the chicks through providing the needed warmth and protection against predators. Radiant brooder refers to some type of heated source enclosure for bringing up the baby chicks. Radiant brooders include a heat source, feeders and waterers, and bedding. Besides that, forced air furnaces is the most simplistic heating system where 100% of heat produced is the form of very hot air, since the hot air is significantly lighter than the rest of the air in the brooders. Radiant tube heater use propane or natural gas act as the sources for the combustion that place near the ceiling of the chicken brooders. Forced air heater can be combined with radiant tube heater as the sources of heat for the brooders
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2
1.1Problem Statements
Nowadays, chicken brooder is growly develop by many researcher with several type of heating system. Due to the brooder, the thermal comfort of the chicks depends on the design, heat source, and material use. Therefore, the heat source will provide heat to maintain the temperature required for the chicks in the brooder. Radiant brooders provide radiant heat and air heat that will provide thermal comfort for the chicks. Other than that, radiant brooder also cost effective for smaller design, easy to maintain and also the radiant heat directly warm the floor.
Therefore, based on the above statement the radiant brooders needed to be developed with the best type of material and design that capable to provide best thermal comfort for the chicks. All the consideration while develop this project will provide many advantages to the brooders. The improvement and novelty for the brooder will ensure that the brooder give best thermal comfort for the chicks
1.2Objectives of Research
The objectives of this project are as follows:
Main Objective:
To design portable hexagon chicken brooder that give best thermal comfort for chicks.
Specific Objectives:
1. To measure the humidity level and temperature in the brooder using temperature and humidity sensor.
2. To identify the behavior of chicks at different temperature.
3. To correlate association between design of portable chicken brooder with some of parameters.
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3
1.3Scope of Research
By narrowing the needs for this project, a few guidelines are proposed to ensure that this project will achieve its objectives. The scopes covered for this project are:
i. Design hexagon brooder that use radiant heat.
ii. Measuring temperature and humidity level using temperature and humidity sensor.
iii. Identified the behavior of chicks at certain temperature by captured or recorded using digital camera.
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4
CHAPTER 2
LITERATURE REVIEW
This chapter discusses about the articles related to this project. It is consists of the products that have been developed by institutions before this project. This chapter contains the theory and implementation of the components, equipment and programming language used in the previous project.
2.0 Introduction
Solomon Demeke (2012) stated that, chicken brooder is the place for the young chicks live for early periods of growth, when they are unable to maintain their normal body temperature. Other than that, Cora Cooke (1943) stated that brooder house must be capable on maintaining the desired brooding temperature under the different weather conditions. Besides, the place must be tightly constructed to prevent drafts, and must have floor that can be cleaned and disinfected readily. The lighting that is provided in the brooder must be necessary with the number of chicks so it will receive adequate light. There are several type of heating system used in the brooders or poultry house which are force air furnace, conventional brooder, radiant brooder, radiant tube heaters, high intensity radiant heaters and “alternative” heating systems.
2.1 Heat transfer
According to Chris Long and Naser Sayma (2009), energy may exist in two forms, such as heat or work. Heat is usually the level of thermal energy transferred over a good time frame interval. Heat is said to be transferred, when it crosses the boundary. It is said to be natural that heat always flows from high temperature to the
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5
minimal temperature region.. The most importance to make heat to be transferred is temperature difference (gradient).
Figure 2.1: Heat transfer diagram (Chris Long and Naser Layma 2009).
Heat transfer is study on the rate at which heat is transfer, duration of heating or cooling for certain heat duty and surface area. Others, heat transfer also the thermal energy transport due to temperature different.
2.2 Modes of heat transfer
There are three fundamental type involving heat transfers which will be conduction, convection as well as radiation stated by Chris Long and Naser Layma (2009).
2.2.1 Conduction
Energy is actually transferred throughout the program boundary due to your temperature difference by the mechanism linked to intermolecular interactions. Conduction demands matter and does not demand any bulk of motion.
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6
Figure 2.2:Diagram of conduction heat transfer (Chris Long and Naser Layma 2009).
� = −�� ��=−��� −�∆�
The rate of heat transfer per unit area is linearly proportional to the normal temperature gradient.
When the proportionality constant is inserted, then
q is the heat transfer rate ( W )
k is a materialthermal conductivity ( w/m.K )
A is cross sectional area in the direction of heat flow ( � ) dT/dx is the temperature gradient in direction of heat flow ( K ) dx is the thickness ( m )