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C Rotor design tool The rotor design tool enables iterative calculation of aerodynamic flow conditions, forces, blade shape and performance. It is used in the calculation of all numeric and graphed re- sults reported in the main report and in the appendices. The tool is programmed in Micro- soft Excel, making it difficult to fully document the code in this project thesis. Reference is therefore made to electronic version available on the CD-rom, enclosed as att. 2. The code is based on the theory of appendix B.1 and B.2, as well as code originating from [46]. The design tool divides the rotor into 8 annular elements. The inner element constitutes only 1.6 % of the total swept rotor area and it is empirically dispensed from the calculations under the assumption that this element only contains the hub of the rotor and no blades. Neglecting the inner part of the rotor is without any noticeable consequences on the power output. Figure C.1 shows the remaining 7 elements of a blade. Figure C.1: Blade divided into blade elements 139
LIST OF ATTACHMENTSROTOR DESIGN TOOL With the current rotor diameter of 2.7 m, the element size is 168.75 mm. The calculations are performed in the centre of each element. Figure C.2 shows the main program window, which may be divided into four sections. Below follows a description of each section with the intention of illustrating the functional- ity of the rotor design tool. 140 Figure C.2: Main program window of the rotor design tool SECTION 1 SECTION 2 SECTION 3 SECTION 4
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WIND TURBINE DESIGN
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ABSTRACT At the request of the Engi
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CONTENTS 1 Introduction ...........
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E Structural analysis of blades ...
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INTRODUCTION members. Today EWB-DK
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INTRODUCTION Figure 1.2: Left pictu
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INTRODUCTION 6
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PROBLEM STATEMENT reconfigured with
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PROBLEM STATEMENT 10
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METHODOLOGY Figure 3.1: Flow chart
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METHODOLOGY 14 3.1 Calculation meth
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CONCEPTUALISATION the kinetic wind
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CONCEPTUALISATION Figure 4.3: (a) D
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CONCEPTUALISATION issues due to tur
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CONCEPTUALISATION 22 Figure 4.8: Ty
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CONCEPTUALISATION � Darrieus 24 F
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CONCEPTUALISATION 26 Figure 4.13: G
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CONCEPTUALISATION Figure 4.14: Powe
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CONCEPTUALISATION 30 ID Requirement
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CONCEPTUALISATION most suitable sol
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CONCEPTUALISATION The embodiment de
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DESIGN PRESENTATION The main dimens
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DESIGN PRESENTATION The design prop
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DESIGN PRESENTATION The background
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ROTOR 42 6.1 Number of blades Moder
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ROTOR 44 Figure 6.4: Blade design s
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ROTOR Table 6.3 provides a material
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ROTOR Figure 6.7 displays the lift
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ROTOR Figure 6.9: Rotor power outpu
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ROTOR 6.2.3 Manufacturing During th
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ROTOR 54 The three sides of the tem
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ROTOR When the carving process is f
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ROTOR 58 Figure 6.17: Blade attachm
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ROTOR 60 Figure 6.19: Rotor power o
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ROTOR 62 Figure 6.22: Efficiency
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ROTOR sidering the output from the
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ROTOR 66
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GENERATOR AND ELECTRICAL SYSTEM 68
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GENERATOR AND ELECTRICAL SYSTEM The
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GENERATOR AND ELECTRICAL SYSTEM Fig
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GENERATOR AND ELECTRICAL SYSTEM 74
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YAW AND FURLING For an upwind wind
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YAW AND FURLING (16), which are bol
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YAW AND FURLING 80 8.2 Furling syst
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YAW AND FURLING 82 8.3 Summary The
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TOWER Concrete tower 84 Figure 9.1:
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TOWER 86 Figure 9.4: Turbulent air
Page 95 and 96: TOWER Figure 9.7 shows the tower ba
Page 97 and 98: TOWER models [41, p. 111]. Under ce
Page 99 and 100: ALTERNATIVE BLADE DESIGN 92 10.1 Ai
Page 101 and 102: ALTERNATIVE BLADE DESIGN 94 10.3 Su
Page 103 and 104: DESIGN EVALUATION 96 6 W Low-cost m
Page 105 and 106: DESIGN EVALUATION Weaknesses 1) The
Page 107 and 108: FURTHER DEVELOPMENT � Foundation
Page 109 and 110: FURTHER DEVELOPMENT 102
Page 111 and 112: CONCLUSION proposal is highly flexi
Page 113 and 114: NOMENCLATURE Abbreviation Descripti
Page 115 and 116: NOMENCLATURE Lgs Distance between u
Page 117 and 118: NOMENCLATURE 110
Page 119 and 120: BIBLIOGRAPHY [14] Magenn Power Inc.
Page 121 and 122: BIBLIOGRAPHY [53] H. J. Larsen, H.
Page 123 and 124: LIST OF ATTACHMENTSBASIS FOR CALCUL
Page 139 and 140: LIST OF ATTACHMENTSROTOR THEORY Thi
Page 141 and 142: LIST OF ATTACHMENTSROTOR THEORY 134
Page 143 and 144: LIST OF ATTACHMENTSROTOR THEORY Cho
Page 145: LIST OF ATTACHMENTSROTOR THEORY 138
Page 149 and 150: LIST OF ATTACHMENTSROTOR DESIGN TOO
Page 151 and 152: LIST OF ATTACHMENTSAIRFOIL With the
Page 153 and 154: LIST OF ATTACHMENTSAIRFOIL Complete
Page 155 and 156: LIST OF ATTACHMENTSSTRUCTURAL ANALY
Page 191 and 192: LIST OF ATTACHMENTSBLADE ATTACHMENT
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LIST OF ATTACHMENTSSTRUCTURAL VERIF
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LIST OF ATTACHMENTSTOWER ANALYSIS T
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LIST OF ATTACHMENTSFURLING AND YAW
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LIST OF ATTACHMENTSALTERNATIVE AIRF
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LIST OF ATTACHMENTSCOMPLIANCE WITH
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