الصفحة الرئيسية / كتب هندسية / كتب HVAC / Automatic Control for commercial buildings

Automatic Control for commercial buildings

أسم الكتاب

Automatic Control for commercial buildings

الوصف

كتاب من شركة Honeywell أحدى الشركات الرائدة فى مجال BMS

رابط التحميل
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PREFACE

The purpose of this manual is to provide the reader with a fundamental understanding of controls and how they are applied to the many parts of heating, ventilating, and air conditioning systems in commercial buildings.
Many aspects of control are presented including air handling units, terminal units, chillers, boilers, building airflow, water and steam distribution systems, smoke management, and indoor air quality. Control fundamentals,theory, and types of controls provide background for application of controls to heating, ventilating, and air conditioning systems. Discussions of pneumatic, electric, electronic, and digital controls illustrate that applications may use one or more of several different control methods. Engineering data such as equipment sizing, use of psychrometric charts, and conversion formulas supplement and support the control information. To enhance understanding, definitions of terms are provided within individual sections.
Building management systems have evolved into a major consideration for the control engineer when evaluating a total heating, ventilating, and air conditioning system design. In response to this consideration, the basics of building management systems configuration are presented.
The control recommendations in this manual are general in nature and are not the basis for any specific job or installation. Control systems are furnished according to the plans and specifications prepared by the control engineer. In many instances there is more than one control solution. Professional expertise and judgment are
required for the design of a control system. This manual is not a substitute for such expertise and judgment.
Always consult a licensed engineer for advice on designing control systems.
It is hoped that the scope of information in this manual will provide the readers with the tools to expand their knowledge base and help develop sound approaches to automatic control.

CONTENTS

Foreward …………………………………………………………………………………… iii
Preface ………………………………………………………………………………………. v
Control System Fundamentals ……………………………………………………….. 1
Control Fundamentals …………………………………………………………………. 3
Introduction ……………………………………………………………………………… 5
Definitions ……………………………………………………………………………….. 5
HVAC System Characteristics ……………………………………………………. 8
Control System Characteristics ………………………………………………….. 15
Control System Components …………………………………………………….. 30
Characteristics and Attributes of Control Methods ………………………… 35
Psychrometric Chart Fundamentals ……………………………………………….. 37
Introduction ……………………………………………………………………………… 38
Definitions ……………………………………………………………………………….. 38
Description of the Psychrometric Chart ……………………………………….. 39
The Abridged Psychrometric Chart …………………………………………….. 40
Examples of Air Mixing Process …………………………………………………. 42
Air Conditioning Processes ……………………………………………………….. 43
Humidifying Process …………………………………………………………………. 44
Process Summary ……………………………………………………………………. 53
ASHRAE Psychrometric Charts …………………………………………………. 53

Pneumatic Control Fundamentals ………………………………………………….. 57
Introduction ……………………………………………………………………………… 59
Definitions ……………………………………………………………………………….. 59
Abbreviations …………………………………………………………………………… 60
Symbols………………………………………………………………………………….. 61
Basic Pneumatic Control System ……………………………………………….. 61
Air Supply Equipment ……………………………………………………………….. 65
Thermostats ……………………………………………………………………………. 69
Controllers ………………………………………………………………………………. 70
Sensor-Controller Systems ……………………………………………………….. 72
Actuators and Final Control Elements …………………………………………. 74
Relays and Switches ………………………………………………………………… 77
Pneumatic Control Combinations ……………………………………………….. 84
Pneumatic Centralization ………………………………………………………….. 89
Pneumatic Control System Example …………………………………………… 90
Electric Control Fundamentals …………………………………………………… 95
Introduction ……………………………………………………………………………… 97
Definitions ……………………………………………………………………………….. 97
How Electric Control Circuits are Classified …………………………………. 99
Series 40 Control Circuits ………………………………………………………….. 100
Series 80 Control Circuits ………………………………………………………….. 102
Series 60 Two-Position Control Circuits ……………………………………….. 103
Series 60 Floating Control Circuits ……………………………………………… 106
Series 90 Control Circuits ………………………………………………………….. 107
Motor Control Circuits ……………………………………………………………….. 114

Electronic Control Fundamentals ………………………………………………… 119
Introduction ……………………………………………………………………………… 120
Definitions ……………………………………………………………………………….. 120
Typical System ………………………………………………………………………… 122
Components ……………………………………………………………………………. 122
Electronic Controller Fundamentals ……………………………………………. 129
Typical System Application ………………………………………………………… 130
Microprocessor-Based/DDC Fundamentals ……………………………………… 131
Introduction ……………………………………………………………………………… 133
Definitions ……………………………………………………………………………….. 133
Background …………………………………………………………………………….. 134
Advantages …………………………………………………………………………….. 134
Controller Configuration ……………………………………………………………. 135
Types of Controllers ………………………………………………………………….. 136
Controller Software …………………………………………………………………… 137
Controller Programming ……………………………………………………………. 142
Typical Applications ………………………………………………………………….. 145
Indoor Air Quality Fundamentals …………………………………………………… 149
Introduction ……………………………………………………………………………… 151
Definitions ……………………………………………………………………………….. 151
Abbreviations …………………………………………………………………………… 153
Indoor Air Quality Concerns ………………………………………………………. 154
Indoor Air Quality Control Applications ………………………………………… 164
Bibliography …………………………………………………………………………….. 170
Smoke Management Fundamentals ……………………………………………….. 171
Introduction ……………………………………………………………………………… 172
Definitions ……………………………………………………………………………….. 172
Objectives ……………………………………………………………………………….. 173
Design Considerations ……………………………………………………………… 173
Design Priniples ………………………………………………………………………. 175
Control Applications …………………………………………………………………. 178
Acceptance Testing ………………………………………………………………….. 181
Leakage Rated Dampers ………………………………………………………….. 181
Bibliography …………………………………………………………………………….. 182
Building Management System Fundamentals……………………………………. 183
Introduction ……………………………………………………………………………… 184
Definitions ……………………………………………………………………………….. 184
Background …………………………………………………………………………….. 185
System Configurations ……………………………………………………………… 186
System Functions …………………………………………………………………….. 189
Integration of Other Systems ……………………………………………………… 196

Control System Applications …………………………………………………………. 199
Air Handling System Control Applications ……………………………………….. 201
Introduction ……………………………………………………………………………… 203
Abbreviations …………………………………………………………………………… 203
Requirements for Effective Control ……………………………………………… 204
Applications-General ………………………………………………………………… 206
Valve and Damper Selection ……………………………………………………… 207
Symbols………………………………………………………………………………….. 208
Ventilation Control Processes ……………………………………………………. 209
Fixed Quantity of Outdoor Air Control …………………………………………. 211
Heating Control Processes ………………………………………………………… 223
Preheat Control Processes ……………………………………………………….. 228
Humidification Control Process ………………………………………………….. 235
Cooling Control Processes ………………………………………………………… 236
Dehumidification Control Processes …………………………………………… 243
Heating System Control Process ……………………………………………….. 246
Year-Round System Control Processes ………………………………………. 248
ASHRAE Psychrometric Charts …………………………………………………. 261
Building Airflow System Control Applications …………………………………. 263
Introduction ……………………………………………………………………………… 265
Definitions ……………………………………………………………………………….. 265
Airflow Control Fundamentals ……………………………………………………. 266
Airflow Control Applications ……………………………………………………….. 280
References ……………………………………………………………………………… 290
Chiller, Boiler, and Distribution System Control Applications …………….. 291
Introduction ……………………………………………………………………………… 295
Abbreviations …………………………………………………………………………… 295
Definitions ……………………………………………………………………………….. 295
Symbols………………………………………………………………………………….. 296
Chiller System Control ………………………………………………………………. 297
Boiler System Control ……………………………………………………………….. 327
Hot and Chilled Water Distribution Systems Control ……………………… 335
High Temperature Water Heating System Control …………………………. 374
District Heating Applications………………………………………………………. 380
Individual Room Control Applications …………………………………………… 395
Introduction ……………………………………………………………………………… 397
Unitary Equipment Control ………………………………………………………… 408
Hot Water Plant Considerations …………………………………………………. 424

Engineering Information ……………………………………………………………… 425
Valve Selection and Sizing ……………………………………………………………. 427
Introduction ……………………………………………………………………………… 428
Definitions ……………………………………………………………………………….. 428
Valve Selection ………………………………………………………………………… 432
Valve Sizing …………………………………………………………………………….. 437
Damper Selection and Sizing ………………………………………………………… 445
Introduction ……………………………………………………………………………… 447
Definitions ……………………………………………………………………………….. 447
Damper Selection …………………………………………………………………….. 448
Damper Sizing …………………………………………………………………………. 457
Damper Pressure Drop …………………………………………………………….. 462
Damper Applications ………………………………………………………………… 463
General Engineering Data ……………………………………………………………. 465
Introduction ……………………………………………………………………………… 466
Conversion Formulas and Tables ……………………………………………….. 466
Electrical Data …………………………………………………………………………. 473
Properties of Saturated Steam Data …………………………………………… 476
Airflow Data …………………………………………………………………………….. 477
Moisture Content of Air Data ……………………………………………………… 479
Index ……………………………………………………………………………… 483

أسم الكتاب Automatic Control for commercial buildings الوصف كتاب من شركة Honeywell أحدى الشركات الرائدة فى مجال BMS رابط التحميل   PREFACE The purpose of this manual is to provide the reader with a fundamental understanding of controls and how they are applied to the many parts of heating, ventilating, and air conditioning systems in commercial buildings. Many aspects of control are presented including air handling units, terminal units, chillers, boilers, building airflow, water and steam distribution systems, smoke management, and indoor air quality. Control fundamentals,theory, and types of controls provide background for application of controls to heating, ventilating, and air conditioning systems. Discussions…

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