This expanded edition of David Chadderton's Air Conditioning is a textbook for undergraduate courses in building services and environmental engineering, and for BTEC continuing diploma, BTEC continuing educational diploma, higher national diploma and certificate courses in the building services engineering. It will also be of considerable help to students on nationalew certificate and diploma programmes. The book includes a new chapter on the application of fans to air duct systems. The principle of employing spreadsheet software for design calculations established in the first edition is expanded upon by the inclusion of data on air duct design, and fan and duct system performance curves. The principal spreadsheet cell contents are listed and the user is encouraged to adapt these spreadsheets for design applications. The author's book Building Services Engineering Spreadsheets will be a valuable reference for such adaptations. The design of air conditioning systems involves considerable calculation work, which is now mainly carried out using dedicated computer software.
However, the engineering principles need to be fully understood in the first instance, as do the basic formulae and calculation techniques used. The reader is actively involved in the use of such data by the generous use of worked examples, exercises and design assignments. Equations and data are from the Chartered Institution of Building Services Engineers Guide.
Table of Contents
Preface. Introduction. Acknowledgements. The use of SI units SI units; multiples and sub-multiples, physical constants.Symbols. List of figures. Air conditioning systems:The decision to air condition. Methods of system operation. Low cost cooling. Air handling zones. Single duct variable air temperature 100 per cent fresh air. Single duct variable temperature with recirculation. Single duct variable temperature multiple zone. Single duct variable air volume. Single duct variable air volume and temperature. Single duct variable air volume perimeter heating. Single duct with induction units. Single duct with fan coil units. Single duct reversible heat pump. Dual duct with variable temperature. Dual duct with variable air volume. Independent unit. Split system. Reversible heat pump. Chilled ceiling. District cooling. Project building. Airport system. Questions. Psychrometric Design Properties of humid air. Summary of formulae. Psychrometric processes. Heating. Cooling. Mixing. Steam humidification. Questions. Solar heat gain. Solar and internal heat gains. Sun position. Shading effects. Design total irradiance. Sol air temperature. Heat transmission through glazing. Heat gain through the opaque structure. Plant cooling load. Peak summertime temperature in a building. Balance temperature. Questions. Fluid flow. Pipe and duct equation. Water flow at 10oC. Water flow at 75oC. Flow of methane in pipes. Air flow in ducts. Heat carrying capacity. Pump and fan power consumption. Thermal storage. Questions. System design. Ventilation requirements. Air handling equations. Plant air flow design. Coordinated system calculations. Question. Ductwork design. Air pressure in a duct. Variations of pressure along a duct. Pressure changes at a fan. Flow measurement in a duct. Ductwork system design. Duct sizing program. Questions. Automatic control systems. Components of control systems. Control system diagramme. Heating and ventilating control. Single duct variable air temperature control. Single duct variable air volume control, vav. Chilled water plant. Electrical wiring diagramme. Questions. Commissioning and maintenance. Commissioning. Information required. Visual data. Electrical items. Setting to work. Duct air leakage test. Air flow regulation. Instruments needed. Gas detectors. Ventilation rate measurement. Commissioning automatic control systems. Commissioning sequence. Maintenance schedule. Questions. Fans and systems. Introduction. Fan types. Fan characteristic curves. Fan data calculation. Fan testing. Duct system characteristic. Fans in series. Fan power. Fan performance control. Commissioning and maintenance. Questions. References. Index.